3093 lines
143 KiB
Plaintext
3093 lines
143 KiB
Plaintext
import "@std/mem"
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import "@std/arraylist"
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import "@std/hashmap"
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import "@source/ast"
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import "@source/diagnostics"
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import "@source/strpool"
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import "@source/lower"
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import "@source/interpreter"
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import "@source/ir"
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sema :: import "@source/sema"
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typecheck :: import "@source/sema/check"
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@hide:file no_node :: maxval!(ast.NodeId)
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@hide:file no_index :: maxval!(usize)
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@hide:file
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Error :: alias mem.AllocError | diagnostics.CapacityError | strpool.InternError
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@hide:file
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ValueKind :: enum {
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invalid
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type
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integer
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boolean
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string
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function
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null
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real
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aggregate
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}
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@hide:file
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Value :: struct {
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kind ValueKind = .invalid
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node ast.NodeId = no_node
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magnitude u64 = 0
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negative bool = false
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boolean bool = false
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annotation ast.NodeId = no_node
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}
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@hide:file
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Instance :: struct {
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function ast.NodeId
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arguments []mut Value
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declaration ast.NodeId = no_node
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type ast.NodeId = no_node
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next usize = no_index
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diagnostic diagnostics.DiagnosticId = diagnostics.no_diagnostic
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signature ast.NodeId = no_node
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value ast.NodeId = no_node
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}
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@hide:file
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Rewrite :: struct { target ast.NodeId, saved ast.NodeId }
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#! owns an undo log and retained checking obligations; deinit releases them with their retained allocator.
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#! borrows the caller's AST builder; call deinit before finishing or deinitializing that builder.
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#! generated nodes remain arena-owned and are released with the AST.
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Result :: struct {
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builder @mut ast.Builder
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changes arraylist.ArrayList(Rewrite)
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constraints arraylist.ArrayList(ast.NodeId)
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}
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#! restores rewritten source nodes in the borrowed builder and releases the undo log and checking obligations.
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#! does not remove generated arena nodes or restore resolution bindings.
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deinit proc(result @mut Result) void {
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index := result.changes.items.len
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while (index > 0) {
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index -= 1
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change :: result.changes.items[index]
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ast.replace_node_from_source(result.builder, change.target, change.saved)
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}
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arraylist.deinit(&result.changes)
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arraylist.deinit(&result.constraints)
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}
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@hide:file
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State :: struct {
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allocator mem.Allocator
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builder @mut ast.Builder
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tree ast.Tree
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strings @mut strpool.StringPool
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bindings arraylist.ArrayList(sema.Binding)
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declarations arraylist.ArrayList(ast.NodeId)
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instances arraylist.ArrayList(Instance)
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cache hashmap.AutoHashMap(usize, usize)
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expanded arraylist.ArrayList(u8)
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diagnostics @mut diagnostics.Store
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depth usize = 0
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original_count usize
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rewrites @mut Result
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mapping []mut ast.NodeId
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resolution @mut sema.Resolution
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evaluation_diagnostic diagnostics.DiagnosticId = diagnostics.no_diagnostic
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type_execution_depth usize = 0
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type_execution_remaining usize = 0
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}
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#! elaborates templates into cached concrete declarations in the caller-owned `builder` arena.
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#! extends `resolution` to cover generated nodes; no template reaches checking or lowering.
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#! `allocator` supplies returned logs, temporary storage released on every exit, and replacement resolution bindings.
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#! use the allocator retained by `resolution`; the returned Result borrows `builder` until the caller calls deinit.
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#! on failure, restores rewritten source nodes and releases logs; generated nodes remain arena-owned.
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elaborate proc(
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allocator mem.Allocator,
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builder @mut ast.Builder,
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root ast.NodeId,
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resolution @mut sema.Resolution,
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strings @mut strpool.StringPool,
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diagnostic_store @mut diagnostics.Store,
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) Result ! Error {
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result := Result{ builder = builder, changes = arraylist.init(allocator), constraints = arraylist.init(allocator) }
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errdefer deinit(&result)
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# explicit evaluation is useful even in packages without generic declarations.
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original :: ast.view(builder, root)
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needed := false
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for (0..ast.node_count(&original)) |i| {
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id :: ast.NodeId(i)
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class :: ast.node_class(&original, id)
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if (class == .expression and ast.expr_kind(&original, id) == .comptime_expr) needed = true
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if (class == .expression and ast.expr_kind(&original, id) == .builtin_call) {
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name :: ast.builtin_call(&original, id).name
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if (mem.eql(ast.source_text(&original, ast.node_span(&original, name)), "field")) needed = true
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}
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if (class == .function and ast.function_generic(&original, id)) needed = true
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if (class == .function) {
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result_type :: sema.binding(resolution, ast.function_decl(&original, id).return_type)
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if (
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(result_type.kind == .builtin and result_type.data.builtin == .type)
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or type_array_annotation(&original, resolution.storage.bindings,
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ast.function_decl(&original, id).return_type)
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) needed = true
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}
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if (needed) break
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}
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if (!needed) return result
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mapping :: try mem.alloc(ast.NodeId, allocator, ast.node_count(&original))
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defer mem.free(allocator, mapping)
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state := State{
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allocator = allocator, builder = builder, tree = ast.view(builder, root), strings = strings,
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bindings = arraylist.init(allocator), declarations = arraylist.init(allocator),
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instances = arraylist.init(allocator), cache = hashmap.init(allocator),
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expanded = arraylist.init(allocator), diagnostics = diagnostic_store,
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original_count = ast.node_count(&original),
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rewrites = &result,
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mapping = mapping,
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resolution = resolution,
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}
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defer arraylist.deinit(&state.bindings)
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defer arraylist.deinit(&state.declarations)
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defer arraylist.deinit(&state.expanded)
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defer hashmap.deinit(&state.cache)
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defer {
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for (state.instances.items) |instance| mem.free(allocator, instance.arguments)
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arraylist.deinit(&state.instances)
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}
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count :: ast.node_count(&state.tree)
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for (0..count) |i| try arraylist.append(&state.bindings, sema.binding(resolution, ast.NodeId(i)))
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for (0..ast.package_decl_count(&state.tree)) |i| {
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id :: ast.package_decl(&state.tree, i)
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if (ast.decl_kind(&state.tree, id) == .function and template(&state, id)) continue
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try arraylist.append(&state.declarations, id)
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}
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index := 0
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while (index < state.declarations.items.len) {
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try expand(&state, state.declarations.items[index])
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index += 1
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}
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try remember(&state, root)
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try ast.set_package_declarations(builder, root, state.declarations.items)
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try refresh(&state)
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owned :: try mem.alloc(sema.Binding, allocator, state.bindings.items.len)
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memcopy!(owned, state.bindings.items)
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sema.replace_bindings(resolution, owned)
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return result
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}
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@hide:file
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refresh proc(state @mut State) void ! mem.AllocError {
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state.tree = ast.view(state.builder, state.tree.root)
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count :: ast.node_count(&state.tree)
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while (state.bindings.items.len < count) try arraylist.append(&state.bindings, sema.Binding{})
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while (state.expanded.items.len < count) try arraylist.append(&state.expanded, u8(0))
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}
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@hide:file
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binding proc(state @State, id ast.NodeId) sema.Binding {
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if (usize(id) >= state.bindings.items.len) return sema.Binding{}
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return state.bindings.items[usize(id)]
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}
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@hide:file
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reject proc(state @mut State, id ast.NodeId, code diagnostics.Code) void ! Error {
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span :: ast.node_span(&state.tree, id)
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diagnostic :: try diagnostics.add(state.diagnostics, code, span)
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invalid :: try ast.add_invalid_expr(state.builder, span, diagnostic)
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try replace(state, id, invalid)
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try refresh(state)
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state.bindings.items[usize(id)] = sema.Binding{ kind = .invalid, data = sema.BindingData{ diagnostic = diagnostic } }
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}
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@hide:file
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expand proc(state @mut State, id ast.NodeId) void ! Error {
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try refresh(state)
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if (state.expanded.items[usize(id)] != 0) return
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state.expanded.items[usize(id)] = 1
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class :: ast.node_class(&state.tree, id)
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if (class == .statement and ast.stmt_kind(&state.tree, id) == .expression) {
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expression :: ast.statement_expr(&state.tree, id)
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if (
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ast.expr_kind(&state.tree, expression) == .match_expr
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and try specialize_match(state, expression, id)
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) return
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}
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if (
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class == .expression and ast.expr_kind(&state.tree, id) == .match_expr
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and try specialize_match(state, id, no_node)
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) return
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if (class == .statement and ast.stmt_kind(&state.tree, id) == .if_stmt) {
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conditional :: ast.if_stmt(&state.tree, id)
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explicit :: ast.expr_kind(&state.tree, conditional.condition) == .comptime_expr
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if (conditional.capture == null and (explicit or usize(id) >= state.original_count)) {
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condition :: if (explicit) ast.comptime_operand(&state.tree, conditional.condition) else conditional.condition
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try expand(state, condition)
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if (explicit or branch_constant(state, condition, 0)) {
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state.evaluation_diagnostic = diagnostics.no_diagnostic
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boolean :: try builtin(state, condition, .bool)
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value :: try evaluate_ir(state, condition, boolean)
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if (explicit and value.kind == .invalid and state.evaluation_diagnostic == diagnostics.no_diagnostic)
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state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
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.comptime_argument_required, ast.node_span(&state.tree, condition))
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if (state.evaluation_diagnostic != diagnostics.no_diagnostic) {
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invalid :: try ast.add_invalid_stmt(state.builder, ast.node_span(&state.tree, id),
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state.evaluation_diagnostic)
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try replace(state, id, invalid)
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try refresh(state)
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return
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}
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if (value.kind == .boolean) {
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branch := conditional.then_block
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if (!value.boolean) {
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if (conditional.else_block) |other| branch = other
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else branch = try ast.add_block(state.builder, ast.node_span(&state.tree, id), &[])
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}
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replacement :: try ast.add_block_stmt(state.builder, branch)
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try replace(state, id, replacement)
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try refresh(state)
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try expand(state, branch)
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return
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}
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}
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}
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}
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if (class == .expression and ast.expr_kind(&state.tree, id) == .comptime_expr) {
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operand :: ast.comptime_operand(&state.tree, id)
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state.evaluation_diagnostic = diagnostics.no_diagnostic
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value :: try evaluate(state, operand)
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if (value.annotation == no_node or !type_array_annotation(&state.tree, state.bindings.items, value.annotation))
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try arraylist.append(&state.rewrites.constraints, operand)
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if (value.kind == .invalid) {
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try reject_evaluation(state, id)
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return
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}
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concrete :: try materialize(state, value)
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replacement := concrete.node
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if (value.annotation != no_node and value.kind != .type) {
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replacement = try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, id),
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value.annotation, replacement)
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try refresh(state)
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}
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try replace(state, id, replacement)
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try refresh(state)
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return
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}
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if (class == .expression and ast.expr_kind(&state.tree, id) == .builtin_call) {
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name :: ast.builtin_call(&state.tree, id).name
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if (mem.eql(ast.source_text(&state.tree, ast.node_span(&state.tree, name)), "field")) {
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try expand_field(state, id)
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return
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}
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}
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if (class == .expression and ast.expr_kind(&state.tree, id) == .call) {
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callee :: ast.call_expr(&state.tree, id).callee
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try expand(state, callee)
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resolved :: binding(state, callee)
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if (
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resolved.kind == .declaration
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and ast.node_class(&state.tree, resolved.data.declaration) == .function
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and template(state, resolved.data.declaration)
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) {
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try specialize_call(state, id, resolved.data.declaration)
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return
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}
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}
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count :: ast.child_count(&state.tree, id)
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for (0..count) |i| {
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child :: ast.child(&state.tree, id, i)
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try expand(state, child)
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}
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if (!try type_array_projection(state, id)) {
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try reject_evaluation(state, id)
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return
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}
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if (class == .expression and ast.expr_kind(&state.tree, id) == .binary) {
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view :: ast.binary_expr(&state.tree, id)
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if (
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(view.operator == .equal or view.operator == .not_equal)
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and branch_constant(state, view.left, 0) and branch_constant(state, view.right, 0)
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) {
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left :: try evaluate(state, view.left)
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right :: try evaluate(state, view.right)
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if (left.kind == .type and right.kind == .type) _ = try evaluate_binary(state, id)
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}
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}
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if (usize(id) >= state.original_count and class == .expression and ast.expr_kind(&state.tree, id) == .array_type) {
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view :: ast.array_type(&state.tree, id)
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if (view.count) |count_node| {
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try arraylist.append(&state.rewrites.constraints, count_node)
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value :: try evaluate(state, count_node)
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if (value.kind == .integer) {
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folded :: try materialize(state, value)
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replacement :: try ast.add_array_type(state.builder, ast.node_span(&state.tree, id),
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folded.node, view.element, view.mutable)
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try replace(state, id, replacement)
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try refresh(state)
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}
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}
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}
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}
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# erase only the name: ordinary selection checks the base and retains its place,
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# evaluation order, mutability and active-union checks through both backends.
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@hide:file
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expand_field proc(state @mut State, id ast.NodeId) void ! Error {
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if (ast.call_arg_count(&state.tree, id) != 2) {
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try reject(state, id, .argument_count_mismatch)
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return
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}
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base :: ast.call_arg(&state.tree, id, 0)
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argument :: ast.call_arg(&state.tree, id, 1)
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state.evaluation_diagnostic = diagnostics.no_diagnostic
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value :: try evaluate(state, argument)
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if (value.kind != .string) {
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if (state.evaluation_diagnostic == diagnostics.no_diagnostic)
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state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
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.comptime_argument_required, ast.node_span(&state.tree, argument))
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try reject_evaluation(state, id)
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return
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}
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try arraylist.append(&state.rewrites.constraints, argument)
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text :: ast.literal_text(&state.tree, value.node)
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bytes := arraylist.init(u8, state.allocator)
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defer arraylist.deinit(&bytes)
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cursor := usize(1)
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while (cursor < text.len - 1) {
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byte :: ast.string_next(text, &cursor) catch {
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try reject(state, id, .invalid_escape)
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return
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}
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try arraylist.append(&bytes, byte)
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}
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# only canonical decimal names denote tuple ordinals; "01" is a name.
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numeric := bytes.items.len > 0 and (bytes.items.len == 1 or bytes.items[0] != '0')
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ordinal := u64(0)
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for (bytes.items) |byte| {
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if (byte < '0' or byte > '9') {
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numeric = false
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break
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}
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digit :: u64(byte - '0')
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if (ordinal > divtrunc!(maxval!(u64) - digit, u64(10))) {
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numeric = false
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break
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}
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ordinal = ordinal * 10 + digit
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}
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span :: ast.node_span(&state.tree, argument)
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member := no_node
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if (numeric) member = try ast.add_integer(state.builder, span, ordinal)
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else {
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interned :: try strpool.intern(state.strings, bytes.items)
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member = try ast.add_generated_identifier(state.builder, span, interned, bytes.items)
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}
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selection :: try ast.add_selection(state.builder, ast.node_span(&state.tree, id), base, member)
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try replace(state, id, selection)
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try refresh(state)
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state.expanded.items[usize(id)] = 0
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try expand(state, id)
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}
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# runtime bodies share the type-producer selector, but retain ordinary runtime
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# parameters and control transfers in the selected arm.
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@hide:file
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specialize_match proc(state @mut State, id, statement ast.NodeId) bool ! Error {
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subject :: ast.match_expr(&state.tree, id).subject
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explicit :: ast.expr_kind(&state.tree, subject) == .comptime_expr
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if (!explicit and usize(id) < state.original_count) return false
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try expand(state, subject)
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if (!explicit and !branch_constant(state, subject, 0)) return false
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state.evaluation_diagnostic = diagnostics.no_diagnostic
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index :: try type_match_arm(state, id)
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if (index == no_index) {
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try reject_evaluation(state, id)
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return true
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}
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arm :: ast.match_arm_view(&state.tree, ast.match_arm(&state.tree, id, index))
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selected :: try type_match_body(state, id, arm)
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if (selected == no_node or (statement == no_node and !arm.expression)) {
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try reject_evaluation(state, id)
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return true
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}
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try expand(state, selected)
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if (statement != no_node) {
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replacement := no_node
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if (arm.expression) replacement = try ast.add_expression_stmt(state.builder, selected)
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else replacement = try ast.add_block_stmt(state.builder, selected)
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try replace(state, statement, replacement)
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} else {
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resolved :: binding(state, selected)
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try remember(state, id)
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ast.replace_node_from_source(state.builder, id, selected)
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try refresh(state)
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state.bindings.items[usize(id)] = resolved
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}
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try refresh(state)
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return true
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}
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# only probe side-effect-free expressions. ordinary calls stay runtime unless the
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# source requests evaluation with $(); probing must not execute FFI or emit traps.
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@hide:file
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branch_constant proc(state @State, id ast.NodeId, depth usize) bool {
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if (depth >= 128) return false
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resolved :: binding(state, id)
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if (resolved.kind == .builtin) return true
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if (resolved.kind == .declaration) {
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target :: resolved.data.declaration
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if (ast.node_class(&state.tree, target) == .function) return true
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if (ast.node_class(&state.tree, target) != .statement) return false
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declaration :: ast.statement_decl(&state.tree, target)
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initializer :: ast.expr_kind(&state.tree, declaration.initializer)
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# contextual aggregates may omit defaults with runtime calls.
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if (declaration.type != null and (initializer == .record_literal or initializer == .array_literal)) return false
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return (
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declaration.mutability == .constant
|
|
and branch_constant(state, declaration.initializer, depth + 1)
|
|
)
|
|
}
|
|
match ast.expr_kind(&state.tree, id) {
|
|
.literal_int, .literal_float, .literal_bool, .literal_string, .literal_null, .literal_void: return true
|
|
.typed_constant: return branch_constant(state, ast.typed_constant(&state.tree, id).value, depth + 1)
|
|
.enum_literal: return true
|
|
.record_literal: {
|
|
# typed literals may omit defaults; materialized constants are complete
|
|
# contextual literals inside a typed_constant wrapper.
|
|
for (0..ast.record_field_count(&state.tree, id)) |i| {
|
|
field :: ast.field(&state.tree, ast.record_field(&state.tree, id, i))
|
|
if (field.value == null or !branch_constant(state, field.value?, depth + 1)) return false
|
|
}
|
|
return ast.record_literal(&state.tree, id).type == null
|
|
}
|
|
.array_literal: {
|
|
for (0..ast.array_element_count(&state.tree, id)) |i| {
|
|
if (!branch_constant(state, ast.array_element(&state.tree, id, i), depth + 1)) return false
|
|
}
|
|
return true
|
|
}
|
|
.selection: return branch_constant(state, ast.selection_expr(&state.tree, id).base, depth + 1)
|
|
.index: {
|
|
view :: ast.index_expr(&state.tree, id)
|
|
return branch_constant(state, view.base, depth + 1) and branch_constant(state, view.index, depth + 1)
|
|
}
|
|
.unary: {
|
|
view :: ast.unary_expr(&state.tree, id)
|
|
return (
|
|
(view.operator == .negate or view.operator == .logical_not)
|
|
and branch_constant(state, view.operand, depth + 1)
|
|
)
|
|
}
|
|
.binary: {
|
|
view :: ast.binary_expr(&state.tree, id)
|
|
return (
|
|
branch_constant(state, view.left, depth + 1)
|
|
and branch_constant(state, view.right, depth + 1)
|
|
)
|
|
}
|
|
.pointer_type: return branch_constant(state, ast.pointer_type(&state.tree, id).element, depth + 1)
|
|
.optional_type, .alias_expr: return branch_constant(state, ast.type_operand(&state.tree, id), depth + 1)
|
|
.record_type, .union_type, .enum_type, .distinct_type, .array_type, .slice_type, .function_type,
|
|
.fallible_type, .sum_type: return true
|
|
else: return false
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
builtin proc(state @mut State, at ast.NodeId, kind sema.BuiltinType) ast.NodeId ! Error {
|
|
id :: try ast.add_identifier(state.builder, ast.node_span(&state.tree, at), strpool.no_str)
|
|
try refresh(state)
|
|
state.bindings.items[usize(id)] = sema.Binding{ kind = .builtin, data = sema.BindingData{ builtin = kind } }
|
|
return id
|
|
}
|
|
|
|
@hide:file
|
|
reference proc(state @mut State, at, target ast.NodeId) ast.NodeId ! Error {
|
|
id :: try ast.add_identifier(state.builder, ast.node_span(&state.tree, at), strpool.no_str)
|
|
try refresh(state)
|
|
state.bindings.items[usize(id)] = sema.Binding{ kind = .declaration, data = sema.BindingData{ declaration = target } }
|
|
return id
|
|
}
|
|
|
|
@hide:file
|
|
is_type proc(state @State, id ast.NodeId) bool {
|
|
value :: binding(state, id)
|
|
return value.kind == .builtin and value.data.builtin == .type
|
|
}
|
|
|
|
# recognize erased result signatures without evaluating dependent lengths or
|
|
# elaborating their bodies. aliases retain the same compile-time-only contract.
|
|
@hide:file
|
|
type_array_annotation proc(tree @ast.Tree, bindings []sema.Binding, input ast.NodeId) bool {
|
|
current := input
|
|
array := false
|
|
for (0..128) |_| {
|
|
resolved :: bindings[usize(current)]
|
|
if (resolved.kind == .builtin) return array and resolved.data.builtin == .type
|
|
if (resolved.kind == .declaration) {
|
|
declaration :: resolved.data.declaration
|
|
if (ast.node_class(tree, declaration) != .statement) return false
|
|
view :: ast.statement_decl(tree, declaration)
|
|
if (view.mutability != .constant) return false
|
|
current = view.initializer
|
|
} else if (ast.expr_kind(tree, current) == .array_type) {
|
|
array = true
|
|
current = ast.array_type(tree, current).element
|
|
} else if (ast.expr_kind(tree, current) == .alias_expr) {
|
|
current = ast.type_operand(tree, current)
|
|
} else return false
|
|
}
|
|
return false
|
|
}
|
|
|
|
@hide:file
|
|
compiletime_result proc(state @State, annotation ast.NodeId) bool {
|
|
return is_type(state, annotation) or type_array_annotation(&state.tree, state.bindings.items, annotation)
|
|
}
|
|
|
|
@hide:file
|
|
specialize_call proc(state @mut State, call, function ast.NodeId) void ! Error {
|
|
if (state.depth >= 128 or state.instances.items.len >= 4096) {
|
|
try reject(state, call, .specialization_limit)
|
|
return
|
|
}
|
|
state.depth += 1
|
|
defer state.depth -= 1
|
|
count :: ast.function_param_count(&state.tree, function)
|
|
# type and type-array results have no runtime call: every input is specialized.
|
|
type_result :: compiletime_result(state, ast.function_decl(&state.tree, function).return_type)
|
|
runtime := usize(0)
|
|
for (0..count) |i| {
|
|
if (!type_result and !ast.param(&state.tree, ast.function_param(&state.tree, function, i)).comptime) runtime += 1
|
|
}
|
|
supplied :: ast.call_arg_count(&state.tree, call)
|
|
explicit :: supplied == count
|
|
if (!explicit and (type_result or supplied != runtime)) {
|
|
try reject(state, call, .argument_count_mismatch)
|
|
return
|
|
}
|
|
arguments :: try mem.alloc(Value, state.allocator, count)
|
|
defer mem.free(state.allocator, arguments)
|
|
mem.set(arguments, Value{})
|
|
runtime_arguments := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&runtime_arguments)
|
|
position := 0
|
|
for (0..count) |i| {
|
|
parameter :: ast.function_param(&state.tree, function, i)
|
|
view :: ast.param(&state.tree, parameter)
|
|
if (view.comptime and !explicit) continue
|
|
argument :: ast.call_arg(&state.tree, call, position)
|
|
position += 1
|
|
try expand(state, argument)
|
|
if (type_result or view.comptime) {
|
|
state.evaluation_diagnostic = diagnostics.no_diagnostic
|
|
annotation := view.type
|
|
contextual := contextual_literal(state, argument)
|
|
if (!contextual and !is_type(state, annotation)) {
|
|
type :: try canonical_type(state, annotation)
|
|
contextual = type != no_node and ast.expr_kind(&state.tree, type) == .fallible_type
|
|
}
|
|
if (contextual or type_array_annotation(&state.tree, state.bindings.items, annotation))
|
|
annotation = try argument_annotation(state, function, view.type, arguments)
|
|
arguments[i] = try evaluate_expected(state, argument, annotation)
|
|
if (arguments[i].kind == .invalid) {
|
|
try reject_evaluation(state, call)
|
|
return
|
|
}
|
|
if (is_type(state, view.type) != (arguments[i].kind == .type)) {
|
|
try reject(state, call, .type_mismatch)
|
|
return
|
|
}
|
|
} else {
|
|
try arraylist.append(&runtime_arguments, argument)
|
|
}
|
|
}
|
|
if (!explicit) {
|
|
for (0..usize(2)) |phase| {
|
|
position = 0
|
|
for (0..count) |i| {
|
|
parameter :: ast.function_param(&state.tree, function, i)
|
|
view :: ast.param(&state.tree, parameter)
|
|
if (view.comptime) continue
|
|
argument :: runtime_arguments.items[position]
|
|
position += 1
|
|
contextual :: flexible(state, argument)
|
|
if (contextual != (phase == 1)) continue
|
|
actual :: try expression_type(state, argument, 0)
|
|
if (actual == no_node or !try infer(state, function, view.type, actual, arguments, contextual)) {
|
|
try reject(state, call, .cannot_infer_generic)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (0..count) |i| {
|
|
parameter :: ast.function_param(&state.tree, function, i)
|
|
if (ast.param(&state.tree, parameter).comptime and arguments[i].kind == .invalid) {
|
|
try reject(state, call, .cannot_infer_generic)
|
|
return
|
|
}
|
|
}
|
|
key := usize(function)
|
|
for arguments |argument| {
|
|
if (argument.kind != .invalid) key = mix(key, try value_hash(state, argument))
|
|
}
|
|
head := no_index
|
|
if (hashmap.get(&state.cache, key)) |found| head = found
|
|
current := head
|
|
instance := no_index
|
|
while (current != no_index) {
|
|
entry :: state.instances.items[current]
|
|
equal := entry.function == function and entry.arguments.len == count
|
|
if (equal) {
|
|
for (0..count) |i| {
|
|
if (!try value_equal(state, entry.arguments[i], arguments[i])) {
|
|
equal = false
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if (equal) {
|
|
instance = current
|
|
break
|
|
}
|
|
current = entry.next
|
|
}
|
|
if (instance == no_index) {
|
|
for (0..count) |i| {
|
|
if (arguments[i].kind != .invalid) arguments[i] = try materialize(state, arguments[i])
|
|
}
|
|
values :: try mem.alloc(Value, state.allocator, count)
|
|
memcopy!(values, arguments)
|
|
instance = state.instances.items.len
|
|
arraylist.append(&state.instances, Instance{ function = function, arguments = values, next = head }) catch |err| {
|
|
mem.free(state.allocator, values)
|
|
return err
|
|
}
|
|
# cache heads are replaced without reallocating a second entry for the same hash.
|
|
if (head != no_index) {
|
|
for (state.cache.entries) |@entry| {
|
|
if (entry.hash != 0 and entry.key == key) {
|
|
entry.value = instance
|
|
break
|
|
}
|
|
}
|
|
} else {
|
|
hashmap.put(&state.cache, key, instance) catch |err| {
|
|
match err {
|
|
.key_exists: unreachable
|
|
else: return err
|
|
}
|
|
}
|
|
}
|
|
try instantiate(state, instance, call)
|
|
if (binding(state, call).kind == .invalid) {
|
|
state.instances.items[instance].diagnostic = binding(state, call).data.diagnostic
|
|
return
|
|
}
|
|
}
|
|
diagnostic :: state.instances.items[instance].diagnostic
|
|
if (diagnostic != diagnostics.no_diagnostic) {
|
|
invalid :: try ast.add_invalid_expr(state.builder, ast.node_span(&state.tree, call), diagnostic)
|
|
try replace(state, call, invalid)
|
|
try refresh(state)
|
|
state.bindings.items[usize(call)] = sema.Binding{ kind = .invalid, data = sema.BindingData{ diagnostic = diagnostic } }
|
|
return
|
|
}
|
|
target :: state.instances.items[instance].declaration
|
|
if (target == no_node and state.instances.items[instance].value == no_node) {
|
|
try reject(state, call, .specialization_cycle)
|
|
return
|
|
}
|
|
if (explicit) {
|
|
signature :: state.instances.items[instance].signature
|
|
for (0..count) |i| {
|
|
parameter :: ast.function_param(&state.tree, signature, i)
|
|
view :: ast.param(&state.tree, parameter)
|
|
if (
|
|
(!type_result and !view.comptime) or is_type(state, view.type)
|
|
or type_array_annotation(&state.tree, state.bindings.items, view.type)
|
|
) continue
|
|
original :: ast.call_arg(&state.tree, call, i)
|
|
constraint :: try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, original), view.type, original)
|
|
try refresh(state)
|
|
try arraylist.append(&state.rewrites.constraints, constraint)
|
|
}
|
|
}
|
|
replacement := state.instances.items[instance].value
|
|
if (replacement == no_node) {
|
|
callee :: try reference(state, call, target)
|
|
if (state.instances.items[instance].type != no_node)
|
|
replacement = try ast.add_type_operand(state.builder, ast.node_span(&state.tree, call), callee, true)
|
|
else replacement = try ast.add_call(state.builder, ast.node_span(&state.tree, call), callee, runtime_arguments.items)
|
|
}
|
|
try replace(state, call, replacement)
|
|
try refresh(state)
|
|
}
|
|
|
|
@hide:file
|
|
instantiate proc(state @mut State, index usize, call ast.NodeId) void ! Error {
|
|
function :: state.instances.items[index].function
|
|
type_result :: compiletime_result(state, ast.function_decl(&state.tree, function).return_type)
|
|
count :: state.original_count
|
|
clone_start :: ast.node_count(&state.tree)
|
|
mapping :: state.mapping
|
|
mem.set(mapping, no_node)
|
|
parameters :: ast.function_param_count(&state.tree, function)
|
|
for (0..parameters) |i| {
|
|
parameter :: ast.function_param(&state.tree, function, i)
|
|
if (!type_result and !ast.param(&state.tree, parameter).comptime) continue
|
|
value :: state.instances.items[index].arguments[i]
|
|
replacement := value.node
|
|
annotation :: ast.param(&state.tree, parameter).type
|
|
if (!is_type(state, annotation)) {
|
|
concrete_type :: try ast.clone_subtree(state.builder, annotation, mapping)
|
|
replacement = try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, parameter), concrete_type, value.node)
|
|
try refresh(state)
|
|
}
|
|
for (0..count) |n| {
|
|
resolved :: binding(state, ast.NodeId(n))
|
|
if (
|
|
resolved.kind == .declaration and resolved.data.declaration == parameter
|
|
and ast.node_class(&state.tree, ast.NodeId(n)) == .expression
|
|
) mapping[n] = replacement
|
|
}
|
|
}
|
|
clone :: try ast.clone_subtree(state.builder, function, mapping)
|
|
try refresh(state)
|
|
# copy original resolution, remapping references to cloned locals and runtime parameters.
|
|
for (0..count) |i| {
|
|
target :: mapping[i]
|
|
if (target == no_node or usize(target) < clone_start) continue
|
|
if (ast.node_class(&state.tree, target) == .expression and ast.expr_kind(&state.tree, target) == .typed_constant) continue
|
|
value := state.bindings.items[i]
|
|
if (value.kind == .declaration) {
|
|
original :: value.data.declaration
|
|
if (original != function and usize(original) < count and mapping[usize(original)] != no_node)
|
|
value.data.declaration = mapping[usize(original)]
|
|
}
|
|
state.bindings.items[usize(target)] = value
|
|
}
|
|
state.instances.items[index].signature = try ast.copy_node(state.builder, clone)
|
|
try refresh(state)
|
|
view :: ast.function_decl(&state.tree, clone)
|
|
for (0..parameters) |i| {
|
|
parameter :: ast.function_param(&state.tree, clone, i)
|
|
annotation :: ast.param(&state.tree, parameter).type
|
|
if ((type_result or ast.param(&state.tree, parameter).comptime) and !is_type(state, annotation)) {
|
|
if (!try valid_value(state, annotation, state.instances.items[index].arguments[i])) {
|
|
value :: state.instances.items[index].arguments[i]
|
|
code :: if (value.kind == .integer and try integer_type(state, annotation))
|
|
diagnostics.Code.literal_out_of_range else diagnostics.Code.type_mismatch
|
|
try reject(state, call, code)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
if (type_result) {
|
|
if (state.type_execution_depth == 0) state.type_execution_remaining = 4096
|
|
state.type_execution_depth += 1
|
|
defer state.type_execution_depth -= 1
|
|
state.evaluation_diagnostic = diagnostics.no_diagnostic
|
|
constraints_start :: state.rewrites.constraints.items.len
|
|
returned :: try return_type_value(state, view.body, ast.NodeId(clone_start), view.return_type)
|
|
if (returned == no_node) {
|
|
try reject_type_result(state, call, returned, constraints_start)
|
|
return
|
|
}
|
|
if (!is_type(state, view.return_type)) {
|
|
state.instances.items[index].value = returned
|
|
return
|
|
}
|
|
result := returned
|
|
kind :: ast.expr_kind(&state.tree, returned)
|
|
if (kind != .record_type and kind != .union_type and kind != .enum_type and kind != .distinct_type) {
|
|
result = try ast.add_type_operand(state.builder, ast.node_span(&state.tree, returned), returned, true)
|
|
try refresh(state)
|
|
}
|
|
declaration :: try ast.add_statement_decl(state.builder, view.span, view.name,
|
|
ast.name_id(&state.tree, function), null, .constant, result)
|
|
try refresh(state)
|
|
state.instances.items[index].declaration = declaration
|
|
state.instances.items[index].type = returned
|
|
state.bindings.items[usize(declaration)] = sema.Binding{ kind = .declaration, data = sema.BindingData{ declaration = declaration } }
|
|
try arraylist.append(&state.declarations, declaration)
|
|
if (!try expand_type_matches(state, declaration)) {
|
|
try reject_type_result(state, call, result, constraints_start)
|
|
return
|
|
}
|
|
try expand(state, declaration)
|
|
constraint_count :: state.rewrites.constraints.items.len
|
|
for (constraints_start..constraint_count) |i| {
|
|
constraint :: state.rewrites.constraints.items[i]
|
|
if (!try expand_type_matches(state, constraint)) {
|
|
try reject_type_result(state, call, result, constraints_start)
|
|
return
|
|
}
|
|
try expand(state, constraint)
|
|
}
|
|
} else {
|
|
runtime := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&runtime)
|
|
for (0..parameters) |i| {
|
|
parameter :: ast.function_param(&state.tree, clone, i)
|
|
if (!ast.param(&state.tree, parameter).comptime) try arraylist.append(&runtime, parameter)
|
|
}
|
|
concrete :: try ast.add_function_decl(state.builder, view.span, view.name,
|
|
ast.name_id(&state.tree, function), view.return_type, runtime.items, view.body)
|
|
ast.replace_node(state.builder, clone, concrete)
|
|
try refresh(state)
|
|
state.instances.items[index].declaration = clone
|
|
state.bindings.items[usize(clone)] = sema.Binding{ kind = .declaration, data = sema.BindingData{ declaration = clone } }
|
|
try arraylist.append(&state.declarations, clone)
|
|
try expand(state, clone)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
reject_evaluation proc(state @mut State, call ast.NodeId) void ! Error {
|
|
diagnostic :: state.evaluation_diagnostic
|
|
if (diagnostic == diagnostics.no_diagnostic) {
|
|
try reject(state, call, .comptime_argument_required)
|
|
return
|
|
}
|
|
invalid :: try ast.add_invalid_expr(state.builder, ast.node_span(&state.tree, call), diagnostic)
|
|
try replace(state, call, invalid)
|
|
try refresh(state)
|
|
state.bindings.items[usize(call)] = sema.Binding{ kind = .invalid, data = sema.BindingData{ diagnostic = diagnostic } }
|
|
}
|
|
|
|
# failed deferred elaboration must not leave unchecked type expressions in the package.
|
|
@hide:file
|
|
reject_type_result proc(state @mut State, call, result ast.NodeId, constraints_start usize) void ! Error {
|
|
try reject_evaluation(state, call)
|
|
state.evaluation_diagnostic = binding(state, call).data.diagnostic
|
|
if (result != no_node) try reject_evaluation(state, result)
|
|
for (constraints_start..(state.rewrites.constraints.items.len)) |i|
|
|
try reject_evaluation(state, state.rewrites.constraints.items[i])
|
|
}
|
|
|
|
@hide:file
|
|
evaluation_dependencies proc(
|
|
state @mut State, id ast.NodeId, flags []mut u8, declarations @mut arraylist.ArrayList(ast.NodeId),
|
|
) bool ! Error {
|
|
if ((flags[usize(id)] & 4) != 0) return true
|
|
flags[usize(id)] = flags[usize(id)] | 4
|
|
resolved :: binding(state, id)
|
|
if (resolved.kind == .declaration) {
|
|
target :: resolved.data.declaration
|
|
if ((flags[usize(target)] & 8) == 0 and (flags[usize(target)] & 2) == 0) {
|
|
class :: ast.node_class(&state.tree, target)
|
|
if (class == .parameter) return false
|
|
if (class == .statement and ast.statement_decl(&state.tree, target).mutability == .variable) return false
|
|
flags[usize(target)] = flags[usize(target)] | 2
|
|
try arraylist.append(declarations, target)
|
|
}
|
|
}
|
|
for (0..ast.child_count(&state.tree, id)) |i| {
|
|
if (!try evaluation_dependencies(state, ast.child(&state.tree, id, i), flags, declarations)) return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
@hide:file
|
|
evaluation_owned proc(state @State, id ast.NodeId, flags []mut u8) void {
|
|
if ((flags[usize(id)] & 8) != 0) return
|
|
flags[usize(id)] = flags[usize(id)] | 8
|
|
for (0..ast.child_count(&state.tree, id)) |i| evaluation_owned(state, ast.child(&state.tree, id, i), flags)
|
|
}
|
|
|
|
@hide:file
|
|
contextual_literal proc(state @State, id ast.NodeId) bool {
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
return kind == .record_literal or kind == .array_literal or kind == .enum_literal
|
|
}
|
|
|
|
@hide:file
|
|
argument_annotation proc(
|
|
state @mut State, function, annotation ast.NodeId, arguments []Value,
|
|
) ast.NodeId ! Error {
|
|
mapping :: try mem.alloc(ast.NodeId, state.allocator, state.original_count)
|
|
defer mem.free(state.allocator, mapping)
|
|
mem.set(mapping, no_node)
|
|
for (0..ast.function_param_count(&state.tree, function)) |i| {
|
|
if (arguments[i].kind == .invalid) continue
|
|
parameter :: ast.function_param(&state.tree, function, i)
|
|
value :: try materialize(state, arguments[i])
|
|
for (0..mapping.len) |n| {
|
|
resolved :: binding(state, ast.NodeId(n))
|
|
if (
|
|
resolved.kind == .declaration and resolved.data.declaration == parameter
|
|
and ast.node_class(&state.tree, ast.NodeId(n)) == .expression
|
|
) mapping[n] = value.node
|
|
}
|
|
}
|
|
start :: ast.node_count(&state.tree)
|
|
result :: try ast.clone_subtree(state.builder, annotation, mapping)
|
|
try refresh(state)
|
|
for (0..mapping.len) |i| {
|
|
target :: mapping[i]
|
|
if (target != no_node and usize(target) >= start) state.bindings.items[usize(target)] = state.bindings.items[i]
|
|
}
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
evaluate_expected proc(state @mut State, id, annotation ast.NodeId) Value ! Error {
|
|
if (type_array_annotation(&state.tree, state.bindings.items, annotation)) {
|
|
constant :: try type_execution_value(state, id, annotation)
|
|
if (constant == no_node or !try type_array_initialized(state, constant, id)) return Value{}
|
|
value :: ast.typed_constant(&state.tree, constant)
|
|
return Value{ kind = .aggregate, node = value.value, annotation = value.type }
|
|
}
|
|
if (!is_type(state, annotation)) {
|
|
type :: try canonical_type(state, annotation)
|
|
if (type != no_node and (contextual_literal(state, id) or ast.expr_kind(&state.tree, type) == .fallible_type))
|
|
return try evaluate_ir(state, id, type)
|
|
}
|
|
return try evaluate(state, id)
|
|
}
|
|
|
|
# values leaving the temporary interpreter must own no interpreter addresses or module IDs.
|
|
# rebuild contextual source literals while the module and its escaped flat cells are alive.
|
|
@hide:file
|
|
serialize_value proc(
|
|
state @mut State, module @ir.Module, checked @typecheck.Result,
|
|
type typecheck.Type, value ir.Value, span ast.Span,
|
|
) ast.NodeId ! Error {
|
|
result := no_node
|
|
if (type.kind == .array) {
|
|
array :: typecheck.array_type(checked, type.array_type)
|
|
elements := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&elements)
|
|
for (0..array.len) |i| {
|
|
child :: ir.aggregate_item(module, value, i)
|
|
node :: try serialize_value(state, module, checked, array.element, child, span)
|
|
if (node == no_node) return no_node
|
|
try arraylist.append(&elements, node)
|
|
}
|
|
result = try ast.add_array_literal(state.builder, span, elements.items)
|
|
} else if (type.kind == .record) {
|
|
record :: typecheck.record_type(checked, type.record_type)
|
|
# untagged storage has no active member; choosing one could discard bytes.
|
|
if (record.is_union and record.tag_type.kind != .enumeration) return no_node
|
|
fields := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&fields)
|
|
for (record.fields) |field, i| {
|
|
if (record.is_union and !ir.union_active(module, value, i)) continue
|
|
if (record.is_union and field.type.kind == .void) {
|
|
result = try ast.add_enum_literal(state.builder, span, field.name?)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
child :: ir.aggregate_item(module, value, i)
|
|
node :: try serialize_value(state, module, checked, field.type, child, span)
|
|
if (node == no_node) return no_node
|
|
generated :: try ast.add_field(state.builder, span, field.name, null, node)
|
|
try refresh(state)
|
|
try arraylist.append(&fields, generated)
|
|
}
|
|
result = try ast.add_record_literal(state.builder, span, null, fields.items)
|
|
} else if (type.kind == .fallible) {
|
|
container :: typecheck.array_type(checked, type.array_type)
|
|
failed :: ir.union_tag(module, value).data.integer == 1
|
|
index :: if (failed) usize(1) else usize(0)
|
|
channel :: if (failed) container.error_type else container.element
|
|
child :: ir.aggregate_item(module, value, index)
|
|
result = try serialize_value(state, module, checked, channel, child, span)
|
|
if (result == no_node) return no_node
|
|
# keep named success/error types distinct even when their members overlap.
|
|
annotation := no_node
|
|
if (channel.nominal != no_node) annotation = channel.nominal
|
|
else if (channel.kind == .enumeration) annotation = typecheck.enum_type(checked, channel.enum_type).declaration
|
|
else if (channel.kind == .record) annotation = typecheck.record_type(checked, channel.record_type).declaration
|
|
if (annotation != no_node) {
|
|
concrete :: try materialize(state, Value{ kind = .type, node = annotation })
|
|
result = try ast.add_typed_constant(state.builder, span, concrete.node, result)
|
|
}
|
|
} else if (type.kind == .enumeration) {
|
|
enumeration :: typecheck.enum_type(checked, type.enum_type)
|
|
negative :: !ir.unsigned_integer(value.type) and value.data.integer < 0
|
|
magnitude :: if (negative) u64(-(value.data.integer + 1)) + 1 else value.data.unsigned
|
|
for (enumeration.members) |member| {
|
|
if (member.magnitude == magnitude and member.negative == negative) {
|
|
result = try ast.add_enum_literal(state.builder, span, member.name)
|
|
break
|
|
}
|
|
}
|
|
} else if (type.kind == .optional) {
|
|
container :: typecheck.array_type(checked, type.array_type)
|
|
if (container.element.kind == .pointer or container.element.kind == .function) {
|
|
absent :: if (container.element.kind == .function)
|
|
value.data.function == maxval!(ir.FunctionId)
|
|
else value.data.unsigned == maxval!(u64)
|
|
if (!absent) return no_node
|
|
result = try ast.add_literal(state.builder, .null, span)
|
|
} else if (!ir.aggregate_item(module, value, 0).data.boolean) {
|
|
result = try ast.add_literal(state.builder, .null, span)
|
|
} else {
|
|
child :: ir.aggregate_item(module, value, 1)
|
|
return try serialize_value(state, module, checked, container.element, child, span)
|
|
}
|
|
} else if (ir.integer_bits(value.type) != 0 and type.kind != .pointer) {
|
|
negative :: !ir.unsigned_integer(value.type) and value.data.integer < 0
|
|
magnitude :: if (negative) u64(-(value.data.integer + 1)) + 1 else value.data.unsigned
|
|
result = try ast.add_integer(state.builder, span, magnitude)
|
|
if (negative) result = try ast.add_unary(state.builder, span, .negate, result)
|
|
} else if (type.kind == .float) {
|
|
result = try ast.add_float(state.builder, span, value.data.real)
|
|
} else if (type.kind == .bool) {
|
|
result = try ast.add_boolean(state.builder, span, value.data.boolean)
|
|
} else if (type.kind == .string) {
|
|
result = try ast.add_string(state.builder, span, ir.string_bytes(module, value.data.string))
|
|
} else if (type.kind == .void) {
|
|
result = try ast.add_literal(state.builder, .void, span)
|
|
}
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
constant_equal proc(state @mut State, left, right ast.NodeId) bool ! Error {
|
|
kind :: ast.expr_kind(&state.tree, left)
|
|
if (kind != ast.expr_kind(&state.tree, right)) return false
|
|
if (kind == .literal_void) return true
|
|
if (kind == .typed_constant) {
|
|
a :: ast.typed_constant(&state.tree, left)
|
|
b :: ast.typed_constant(&state.tree, right)
|
|
return try same_type(state, a.type, b.type) and try constant_equal(state, a.value, b.value)
|
|
}
|
|
if (kind == .array_literal) {
|
|
count :: ast.array_element_count(&state.tree, left)
|
|
if (count != ast.array_element_count(&state.tree, right)) return false
|
|
for (0..count) |i| {
|
|
if (!try constant_equal(state, ast.array_element(&state.tree, left, i), ast.array_element(&state.tree, right, i))) return false
|
|
}
|
|
return true
|
|
}
|
|
if (kind == .record_literal) {
|
|
count :: ast.record_field_count(&state.tree, left)
|
|
if (count != ast.record_field_count(&state.tree, right)) return false
|
|
for (0..count) |i| {
|
|
a :: ast.field(&state.tree, ast.record_field(&state.tree, left, i))
|
|
b :: ast.field(&state.tree, ast.record_field(&state.tree, right, i))
|
|
if ((a.name == null) != (b.name == null)) return false
|
|
if (a.name != null and ast.name_id(&state.tree, a.name?) != ast.name_id(&state.tree, b.name?)) return false
|
|
if (!try constant_equal(state, a.value?, b.value?)) return false
|
|
}
|
|
return true
|
|
}
|
|
if (kind == .enum_literal)
|
|
return ast.name_id(&state.tree, ast.enum_literal(&state.tree, left)) == ast.name_id(&state.tree, ast.enum_literal(&state.tree, right))
|
|
return try value_equal(state, try evaluate(state, left), try evaluate(state, right))
|
|
}
|
|
|
|
@hide:file
|
|
constant_hash proc(state @mut State, id ast.NodeId) usize ! Error {
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
hash :: enum_index(kind)
|
|
if (kind == .literal_void) return hash
|
|
if (kind == .typed_constant) {
|
|
value :: ast.typed_constant(&state.tree, id)
|
|
return mix(mix(hash, try type_hash(state, value.type)), try constant_hash(state, value.value))
|
|
}
|
|
if (kind == .array_literal) {
|
|
result := hash
|
|
for (0..ast.array_element_count(&state.tree, id)) |i|
|
|
result = mix(result, try constant_hash(state, ast.array_element(&state.tree, id, i)))
|
|
return result
|
|
}
|
|
if (kind == .record_literal) {
|
|
result := hash
|
|
for (0..ast.record_field_count(&state.tree, id)) |i| {
|
|
field :: ast.field(&state.tree, ast.record_field(&state.tree, id, i))
|
|
if (field.name) |name| result = mix(result, usize(ast.name_id(&state.tree, name)))
|
|
result = mix(result, try constant_hash(state, field.value?))
|
|
}
|
|
return result
|
|
}
|
|
if (kind == .enum_literal) return mix(hash, usize(ast.name_id(&state.tree, ast.enum_literal(&state.tree, id))))
|
|
return try value_hash(state, try evaluate(state, id))
|
|
}
|
|
|
|
@hide:file
|
|
evaluate_call proc(state @mut State, call ast.NodeId) Value ! Error {
|
|
callee :: try evaluate(state, ast.call_expr(&state.tree, call).callee)
|
|
if (callee.kind != .function and callee.kind != .type) return Value{}
|
|
result_type := callee.node
|
|
function := no_node
|
|
if (callee.kind == .function) {
|
|
resolved :: binding(state, callee.node)
|
|
if (resolved.kind != .declaration) return Value{}
|
|
function = resolved.data.declaration
|
|
result_type = ast.function_decl(&state.tree, resolved.data.declaration).return_type
|
|
}
|
|
arguments := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&arguments)
|
|
for (0..ast.call_arg_count(&state.tree, call)) |i| {
|
|
argument :: ast.call_arg(&state.tree, call, i)
|
|
value := Value{}
|
|
if (function != no_node and i < ast.function_param_count(&state.tree, function)) {
|
|
annotation :: ast.param(&state.tree, ast.function_param(&state.tree, function, i)).type
|
|
value = try evaluate_expected(state, argument, annotation)
|
|
} else value = try evaluate(state, argument)
|
|
if (value.kind == .invalid) return Value{}
|
|
concrete := try materialize(state, value)
|
|
if (value.annotation != no_node) {
|
|
concrete.node = try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, value.node),
|
|
value.annotation, concrete.node)
|
|
try refresh(state)
|
|
}
|
|
try arraylist.append(&arguments, concrete.node)
|
|
}
|
|
# reuse checking, typed IR and the interpreter: compile-time arithmetic and local
|
|
# inference must have exactly the same semantics as an ordinary runtime call.
|
|
span :: ast.node_span(&state.tree, call)
|
|
invocation :: try ast.add_call(state.builder, span, callee.node, arguments.items)
|
|
try refresh(state)
|
|
return try evaluate_ir(state, invocation, result_type)
|
|
}
|
|
|
|
@hide:file
|
|
evaluate_ir proc(state @mut State, expression, result_type ast.NodeId) Value ! Error {
|
|
if (result_type == no_node) return Value{}
|
|
span :: ast.node_span(&state.tree, expression)
|
|
returned :: try ast.add_return_stmt(state.builder, span, expression)
|
|
statements [1]ast.NodeId :: [returned]
|
|
body :: try ast.add_block(state.builder, span, statements[..])
|
|
try refresh(state)
|
|
return try evaluate_ir_body(state, expression, body, result_type)
|
|
}
|
|
|
|
@hide:file
|
|
evaluate_ir_body proc(state @mut State, at, body, result_type ast.NodeId) Value ! Error {
|
|
span :: ast.node_span(&state.tree, at)
|
|
wrapper :: try ast.add_function_decl(state.builder, span, span, strpool.no_str, result_type, &[], body)
|
|
try refresh(state)
|
|
declarations := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&declarations)
|
|
try arraylist.append(&declarations, wrapper)
|
|
flags := arraylist.init(u8, state.allocator)
|
|
defer arraylist.deinit(&flags)
|
|
index := usize(0)
|
|
while (index < declarations.items.len) {
|
|
declaration :: declarations.items[index]
|
|
try expand(state, declaration)
|
|
while (flags.items.len < ast.node_count(&state.tree)) try arraylist.append(&flags, u8(0))
|
|
flags.items[usize(declaration)] = flags.items[usize(declaration)] | 2
|
|
evaluation_owned(state, declaration, flags.items)
|
|
if (!try evaluation_dependencies(state, declaration, flags.items, &declarations)) return Value{}
|
|
index += 1
|
|
}
|
|
root :: try ast.add_package(state.builder, span, declarations.items)
|
|
try refresh(state)
|
|
bindings :: try mem.alloc(sema.Binding, state.allocator, state.bindings.items.len)
|
|
memcopy!(bindings, state.bindings.items)
|
|
sema.replace_bindings(state.resolution, bindings)
|
|
tree :: ast.view(state.builder, root)
|
|
diagnostic_store := diagnostics.init(state.allocator)
|
|
defer diagnostics.deinit(&diagnostic_store)
|
|
# Resolution's existing diagnostic IDs remain valid in this temporary store.
|
|
for (state.diagnostics.list.items) |diagnostic| try arraylist.append(&diagnostic_store.list, diagnostic)
|
|
original_diagnostics :: diagnostics.count(&diagnostic_store)
|
|
checked := try typecheck.check(state.allocator, &tree, state.resolution, &diagnostic_store)
|
|
defer typecheck.deinit(&checked)
|
|
if (diagnostics.count(&diagnostic_store) != original_diagnostics) {
|
|
diagnostic :: diagnostic_store.list.items[original_diagnostics]
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics, diagnostic.code, diagnostic.span)
|
|
return Value{}
|
|
}
|
|
module := try lower.lower_evaluation(state.allocator, &tree, state.resolution, &checked, wrapper, &diagnostic_store)
|
|
defer ir.deinit(&module)
|
|
outcome := try interpreter.run_evaluation(state.allocator, &module, &diagnostic_store)
|
|
defer interpreter.deinit(&outcome)
|
|
if (outcome.trap) |trap| {
|
|
if (usize(trap) < original_diagnostics) state.evaluation_diagnostic = trap
|
|
else {
|
|
diagnostic :: diagnostics.get(&diagnostic_store, trap)?
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics, diagnostic.code, diagnostic.span)
|
|
}
|
|
return Value{}
|
|
}
|
|
value :: outcome.value
|
|
source_type :: typecheck.type_of(&checked, result_type)
|
|
node :: try serialize_value(state, &module, &checked, source_type, value, span)
|
|
if (node == no_node) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics, .comptime_value_escape, span)
|
|
return Value{}
|
|
}
|
|
if (ir.aggregate(value.type) or source_type.kind == .enumeration or source_type.kind == .void)
|
|
return Value{ kind = .aggregate, node = node, annotation = result_type }
|
|
result := try evaluate(state, node)
|
|
result.annotation = result_type
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
TypeLocal :: struct {
|
|
declaration ast.NodeId
|
|
value ast.NodeId
|
|
annotation ast.NodeId
|
|
}
|
|
|
|
@hide:file
|
|
TypeExecution :: struct {
|
|
locals arraylist.ArrayList(TypeLocal)
|
|
mapping []mut ast.NodeId
|
|
first_owned ast.NodeId
|
|
returned ast.NodeId = no_node
|
|
result_type ast.NodeId
|
|
loop_depth usize = 0
|
|
}
|
|
|
|
@hide:file
|
|
TypeFlow :: enum { next, returned, break, continue, invalid }
|
|
|
|
# type values cannot enter runtime IR. execute their control flow here, substituting
|
|
# owned constants into snapshots; ordinary value operations still use checked IR.
|
|
@hide:file
|
|
return_type_value proc(state @mut State, block, first_owned, result_type ast.NodeId) ast.NodeId ! Error {
|
|
# ponytail: snapshots recheck scalar IR; cap type-control work at 4096 steps
|
|
# until type values can share one persistent checked execution frame.
|
|
execution := TypeExecution{
|
|
locals = arraylist.init(state.allocator),
|
|
mapping = try mem.alloc(ast.NodeId, state.allocator, ast.node_count(&state.tree)),
|
|
first_owned = first_owned,
|
|
result_type = result_type,
|
|
}
|
|
defer arraylist.deinit(&execution.locals)
|
|
defer mem.free(state.allocator, execution.mapping)
|
|
mem.set(execution.mapping, no_node)
|
|
if (try execute_type_block(state, &execution, block) != .returned) return no_node
|
|
return execution.returned
|
|
}
|
|
|
|
@hide:file
|
|
type_step proc(state @mut State, at ast.NodeId) bool ! Error {
|
|
if (state.type_execution_remaining == 0) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.comptime_execution_limit, ast.node_span(&state.tree, at))
|
|
return false
|
|
}
|
|
state.type_execution_remaining -= 1
|
|
return true
|
|
}
|
|
|
|
@hide:file
|
|
prepare_type_snapshot proc(state @mut State, execution @mut TypeExecution, id ast.NodeId) void {
|
|
if (usize(id) >= execution.mapping.len) return
|
|
# substituted arguments belong to the caller, including nominal type identity.
|
|
if (id < execution.first_owned) {
|
|
execution.mapping[usize(id)] = id
|
|
return
|
|
}
|
|
execution.mapping[usize(id)] = no_node
|
|
resolved :: binding(state, id)
|
|
if (resolved.kind == .declaration) {
|
|
for (execution.locals.items) |local| {
|
|
if (local.declaration == resolved.data.declaration) {
|
|
execution.mapping[usize(id)] = local.value
|
|
return
|
|
}
|
|
}
|
|
}
|
|
for (0..ast.child_count(&state.tree, id)) |i|
|
|
prepare_type_snapshot(state, execution, ast.child(&state.tree, id, i))
|
|
}
|
|
|
|
@hide:file
|
|
bind_type_snapshot proc(state @mut State, execution @TypeExecution, id, start ast.NodeId) void {
|
|
if (usize(id) >= execution.mapping.len) return
|
|
target :: execution.mapping[usize(id)]
|
|
if (target == no_node or target < start) return
|
|
resolved := binding(state, id)
|
|
if (resolved.kind == .declaration) {
|
|
declaration :: resolved.data.declaration
|
|
if (usize(declaration) < execution.mapping.len and execution.mapping[usize(declaration)] != no_node)
|
|
resolved.data.declaration = execution.mapping[usize(declaration)]
|
|
}
|
|
state.bindings.items[usize(target)] = resolved
|
|
for (0..ast.child_count(&state.tree, id)) |i|
|
|
bind_type_snapshot(state, execution, ast.child(&state.tree, id, i), start)
|
|
}
|
|
|
|
@hide:file
|
|
type_snapshot proc(state @mut State, execution @mut TypeExecution, id ast.NodeId) ast.NodeId ! Error {
|
|
prepare_type_snapshot(state, execution, id)
|
|
start :: ast.NodeId(ast.node_count(&state.tree))
|
|
result :: try ast.clone_subtree(state.builder, id, execution.mapping)
|
|
try refresh(state)
|
|
bind_type_snapshot(state, execution, id, start)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
nominal_type_value proc(state @State, id ast.NodeId) bool {
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
return kind == .record_type or kind == .union_type or kind == .enum_type or kind == .distinct_type
|
|
}
|
|
|
|
# select with ordinary checked IR so patterns, overlap and exhaustiveness have
|
|
# the same rules as runtime matching, without checking unexecuted type bodies.
|
|
@hide:file
|
|
type_match_arm proc(state @mut State, id ast.NodeId) usize ! Error {
|
|
if (!try expand_type_matches(state, ast.match_expr(&state.tree, id).subject)) return no_index
|
|
try expand(state, ast.match_expr(&state.tree, id).subject)
|
|
arms := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&arms)
|
|
patterns := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&patterns)
|
|
for (0..ast.match_arm_count(&state.tree, id)) |i| {
|
|
arm_id :: ast.match_arm(&state.tree, id, i)
|
|
arm :: ast.match_arm_view(&state.tree, arm_id)
|
|
# selector bodies omit source capture uses, but must retain their resolver failures.
|
|
if (arm.capture) |capture| {
|
|
resolved :: binding(state, capture)
|
|
if (resolved.kind == .invalid) {
|
|
state.evaluation_diagnostic = resolved.data.diagnostic
|
|
return no_index
|
|
}
|
|
}
|
|
if (
|
|
i > 0
|
|
and arm.expression != ast.match_arm_view(
|
|
&state.tree,
|
|
ast.match_arm(&state.tree, id, 0),
|
|
).expression
|
|
) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.type_mismatch, ast.node_span(&state.tree, arm_id))
|
|
return no_index
|
|
}
|
|
patterns.items = patterns.items[..0]
|
|
for (0..ast.match_pattern_count(&state.tree, arm_id)) |j| {
|
|
pattern :: ast.match_pattern(&state.tree, arm_id, j)
|
|
if (!try expand_type_matches(state, pattern)) return no_index
|
|
try expand(state, pattern)
|
|
try arraylist.append(&patterns, pattern)
|
|
}
|
|
span :: ast.node_span(&state.tree, arm_id)
|
|
index :: try ast.add_integer(state.builder, span, u64(i))
|
|
selector :: try ast.add_match_arm(state.builder, span, patterns.items,
|
|
arm.capture, index, true, arm.catch_all)
|
|
try refresh(state)
|
|
try arraylist.append(&arms, selector)
|
|
}
|
|
selector :: try ast.add_match(state.builder, ast.node_span(&state.tree, id),
|
|
ast.match_expr(&state.tree, id).subject, arms.items)
|
|
try refresh(state)
|
|
# selector arms contain only indices. do not specialize this synthetic match
|
|
# again while its checked evaluation expands the wrapper.
|
|
state.expanded.items[usize(selector)] = 1
|
|
selected :: try evaluate_ir(state, selector, try builtin(state, id, .usize))
|
|
if (selected.kind != .integer) return no_index
|
|
return usize(selected.magnitude)
|
|
}
|
|
|
|
# match checking has already validated every capture. copy the active payload
|
|
# out of owned constant storage, never an address in the temporary interpreter.
|
|
@hide:file
|
|
type_match_capture proc(state @mut State, id ast.NodeId) ast.NodeId ! Error {
|
|
subject :: ast.match_expr(&state.tree, id).subject
|
|
annotation :: try expression_type(state, subject, 0)
|
|
value :: try evaluate_ir(state, subject, annotation)
|
|
if (value.kind != .aggregate or ast.expr_kind(&state.tree, value.node) != .record_literal) return no_node
|
|
payload :: ast.field(&state.tree, ast.record_field(&state.tree, value.node, 0))
|
|
for (0..ast.record_field_count(&state.tree, annotation)) |i| {
|
|
field :: ast.field(&state.tree, ast.record_field(&state.tree, annotation, i))
|
|
if (
|
|
field.name != null and payload.name != null
|
|
and ast.name_id(&state.tree, field.name?) == ast.name_id(&state.tree, payload.name?)
|
|
) {
|
|
result :: try ast.add_typed_constant(state.builder,
|
|
ast.node_span(&state.tree, subject), field.type?, payload.value?)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
}
|
|
return no_node
|
|
}
|
|
|
|
@hide:file
|
|
type_match_body proc(state @mut State, id ast.NodeId, arm ast.MatchArmView) ast.NodeId ! Error {
|
|
if (arm.capture == null) return arm.body
|
|
value :: try type_match_capture(state, id)
|
|
if (value == no_node) return no_node
|
|
execution := TypeExecution{
|
|
locals = arraylist.init(state.allocator),
|
|
mapping = try mem.alloc(ast.NodeId, state.allocator, ast.node_count(&state.tree)),
|
|
first_owned = ast.NodeId(0),
|
|
result_type = no_node,
|
|
}
|
|
defer arraylist.deinit(&execution.locals)
|
|
defer mem.free(state.allocator, execution.mapping)
|
|
mem.set(execution.mapping, no_node)
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = arm.capture?, value = value, annotation = ast.typed_constant(&state.tree, value).type,
|
|
})
|
|
return try type_snapshot(state, &execution, arm.body)
|
|
}
|
|
|
|
@hide:file
|
|
type_value_expression proc(state @mut State, input ast.NodeId) ast.NodeId ! Error {
|
|
expression := input
|
|
while (ast.expr_kind(&state.tree, expression) == .match_expr) {
|
|
if (!try type_step(state, expression)) return no_node
|
|
index :: try type_match_arm(state, expression)
|
|
if (index == no_index) return no_node
|
|
arm :: ast.match_arm_view(&state.tree, ast.match_arm(&state.tree, expression, index))
|
|
if (!arm.expression) return no_node
|
|
expression = try type_match_body(state, expression, arm)
|
|
if (expression == no_node) return no_node
|
|
}
|
|
return expression
|
|
}
|
|
|
|
# normalize only selected expression arms before ordinary expansion can visit them.
|
|
# nominal results enter here after their instance declaration is cached.
|
|
@hide:file
|
|
expand_type_matches proc(state @mut State, id ast.NodeId) bool ! Error {
|
|
if (ast.node_class(&state.tree, id) == .expression and ast.expr_kind(&state.tree, id) == .match_expr) {
|
|
selected :: try type_value_expression(state, id)
|
|
if (selected == no_node) return false
|
|
resolved :: binding(state, selected)
|
|
try remember(state, id)
|
|
ast.replace_node_from_source(state.builder, id, selected)
|
|
try refresh(state)
|
|
state.bindings.items[usize(id)] = resolved
|
|
}
|
|
for (0..ast.child_count(&state.tree, id)) |i| {
|
|
if (!try expand_type_matches(state, ast.child(&state.tree, id, i))) return false
|
|
}
|
|
return try type_array_projection(state, id)
|
|
}
|
|
|
|
@hide:file
|
|
type_array_projection proc(state @mut State, id ast.NodeId) bool ! Error {
|
|
if (ast.node_class(&state.tree, id) != .expression) return true
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
if (kind == .index or kind == .selection) {
|
|
base :: if (kind == .index) ast.index_expr(&state.tree, id).base else ast.selection_expr(&state.tree, id).base
|
|
base_binding :: binding(state, base)
|
|
if (base_binding.kind == .invalid) {
|
|
state.evaluation_diagnostic = base_binding.data.diagnostic
|
|
return false
|
|
}
|
|
if (ast.expr_kind(&state.tree, base) != .typed_constant) return true
|
|
array :: ast.typed_constant(&state.tree, base)
|
|
if (!try type_array_storage(state, array.type)) return true
|
|
selected := no_node
|
|
if (kind == .index) {
|
|
index :: try type_array_index(state, ast.index_expr(&state.tree, id).index,
|
|
ast.array_element_count(&state.tree, array.value))
|
|
if (index == no_index) return false
|
|
selected = ast.array_element(&state.tree, array.value, index)
|
|
if (ast.expr_kind(&state.tree, selected) == .literal_undefined) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.read_before_initialization, ast.node_span(&state.tree, id))
|
|
return false
|
|
}
|
|
} else {
|
|
member :: ast.selection_expr(&state.tree, id).member
|
|
if (!mem.eql(ast.literal_text(&state.tree, member), "len")) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.unknown_field, ast.node_span(&state.tree, member))
|
|
return false
|
|
}
|
|
count :: try ast.add_integer(state.builder, ast.node_span(&state.tree, id),
|
|
u64(ast.array_element_count(&state.tree, array.value)))
|
|
selected = try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, id),
|
|
try builtin(state, id, .usize), count)
|
|
try refresh(state)
|
|
}
|
|
# copying a nominal definition into the projection would create a new
|
|
# identity on every read. retain its original node behind a type alias.
|
|
if (nominal_type_value(state, selected)) {
|
|
selected = try ast.add_type_operand(state.builder, ast.node_span(&state.tree, id), selected, true)
|
|
try refresh(state)
|
|
}
|
|
resolved :: binding(state, selected)
|
|
try remember(state, id)
|
|
ast.replace_node_from_source(state.builder, id, selected)
|
|
try refresh(state)
|
|
state.bindings.items[usize(id)] = resolved
|
|
}
|
|
return true
|
|
}
|
|
|
|
# type arrays are persistent AST values, never runtime storage. keep the same
|
|
# typed-constant snapshots as ordinary aggregates, but validate their leaves here.
|
|
@hide:file
|
|
type_array_storage proc(state @mut State, annotation ast.NodeId) bool ! Error {
|
|
current := annotation
|
|
for (0..128) |_| {
|
|
if (is_type(state, current)) return current != annotation
|
|
current = try canonical_type(state, current)
|
|
if (current == no_node or ast.expr_kind(&state.tree, current) != .array_type) return false
|
|
current = ast.array_type(&state.tree, current).element
|
|
}
|
|
return false
|
|
}
|
|
|
|
@hide:file
|
|
type_array_index proc(state @mut State, expression ast.NodeId, count usize) usize ! Error {
|
|
usize_type :: try builtin(state, expression, .usize)
|
|
actual :: try expression_type(state, expression, 0)
|
|
if (!flexible(state, expression) and (actual == no_node or !try same_type(state, actual, usize_type))) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_index_type, ast.node_span(&state.tree, expression))
|
|
return no_index
|
|
}
|
|
value :: try evaluate_ir(state, expression, usize_type)
|
|
if (value.kind != .integer) return no_index
|
|
if (value.magnitude >= u64(count)) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.index_out_of_bounds, ast.node_span(&state.tree, expression))
|
|
return no_index
|
|
}
|
|
return usize(value.magnitude)
|
|
}
|
|
|
|
@hide:file
|
|
type_array_compatible proc(state @mut State, expected, actual ast.NodeId) bool ! Error {
|
|
if (is_type(state, expected) or is_type(state, actual))
|
|
return is_type(state, expected) and is_type(state, actual)
|
|
left :: try canonical_type(state, expected)
|
|
right :: try canonical_type(state, actual)
|
|
if (left == no_node or right == no_node) return false
|
|
if (ast.expr_kind(&state.tree, left) != .array_type or ast.expr_kind(&state.tree, right) != .array_type) return false
|
|
a :: ast.array_type(&state.tree, left)
|
|
b :: ast.array_type(&state.tree, right)
|
|
if (a.mutable != b.mutable or b.count == null) return false
|
|
if (a.count) |count| {
|
|
if (!try value_equal(state, try evaluate(state, count), try evaluate(state, b.count?))) return false
|
|
}
|
|
return try type_array_compatible(state, a.element, b.element)
|
|
}
|
|
|
|
# undefined leaves are initialization state, not type values. snapshots may copy
|
|
# that state locally; procedure boundaries require every leaf to be initialized.
|
|
@hide:file
|
|
type_array_initialized proc(state @mut State, value, at ast.NodeId) bool ! Error {
|
|
kind :: ast.expr_kind(&state.tree, value)
|
|
if (kind == .literal_undefined) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.read_before_initialization, ast.node_span(&state.tree, at))
|
|
return false
|
|
}
|
|
if (kind == .typed_constant)
|
|
return try type_array_initialized(state, ast.typed_constant(&state.tree, value).value, at)
|
|
if (kind == .array_literal) {
|
|
for (0..ast.array_element_count(&state.tree, value)) |i| {
|
|
if (!try type_array_initialized(state, ast.array_element(&state.tree, value, i), at)) return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
# bound the expanded snapshot, not just its dimensions, so later reads and
|
|
# initialization checks cannot traverse an exponentially shared empty shape.
|
|
@hide:file
|
|
type_array_undefined proc(state @mut State, expression, annotation ast.NodeId) ast.NodeId ! Error {
|
|
if (is_type(state, annotation)) return expression
|
|
type :: try canonical_type(state, annotation)
|
|
descriptor :: ast.array_type(&state.tree, type)
|
|
length := Value{}
|
|
if (descriptor.count) |count| length = try evaluate(state, count)
|
|
if (length.kind != .integer or length.negative) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_array_length, ast.node_span(&state.tree, annotation))
|
|
return no_node
|
|
}
|
|
# validate child dimensions even when this dimension is empty.
|
|
child :: try type_array_undefined(state, expression, descriptor.element)
|
|
if (child == no_node) return no_node
|
|
elements := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&elements)
|
|
for (0..length.magnitude) |i| {
|
|
if (!try type_step(state, expression)) return no_node
|
|
element := child
|
|
if (i != 0) element = try type_array_undefined(state, expression, descriptor.element)
|
|
if (element == no_node) return no_node
|
|
try arraylist.append(&elements, element)
|
|
}
|
|
span :: ast.node_span(&state.tree, expression)
|
|
type_span :: ast.node_span(&state.tree, annotation)
|
|
element_type :: if (ast.expr_kind(&state.tree, child) == .typed_constant)
|
|
ast.typed_constant(&state.tree, child).type else descriptor.element
|
|
count :: try ast.add_integer(state.builder, span, length.magnitude)
|
|
concrete :: try ast.add_array_type(state.builder, type_span, count, element_type, descriptor.mutable)
|
|
literal :: try ast.add_array_literal(state.builder, span, elements.items)
|
|
result :: try ast.add_typed_constant(state.builder, span, concrete, literal)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
type_array_value proc(state @mut State, expression, annotation ast.NodeId) ast.NodeId ! Error {
|
|
if (ast.expr_kind(&state.tree, expression) == .literal_undefined)
|
|
return try type_array_undefined(state, expression, annotation)
|
|
type :: try canonical_type(state, annotation)
|
|
array :: ast.array_type(&state.tree, type)
|
|
if (ast.expr_kind(&state.tree, expression) == .typed_constant) {
|
|
actual :: ast.typed_constant(&state.tree, expression)
|
|
if (try type_array_compatible(state, type, actual.type)) return expression
|
|
} else if (ast.expr_kind(&state.tree, expression) == .array_literal) {
|
|
count :: ast.array_element_count(&state.tree, expression)
|
|
if (array.count) |length| {
|
|
value :: try evaluate(state, length)
|
|
if (value.kind != .integer or value.negative) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_array_length, ast.node_span(&state.tree, length))
|
|
return no_node
|
|
}
|
|
if (value.magnitude != u64(count)) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.array_length_mismatch, ast.node_span(&state.tree, expression))
|
|
return no_node
|
|
}
|
|
}
|
|
elements := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&elements)
|
|
element_type := array.element
|
|
for (0..count) |i| {
|
|
element :: try type_execution_value(state,
|
|
ast.array_element(&state.tree, expression, i), element_type)
|
|
if (element == no_node) return no_node
|
|
if (ast.expr_kind(&state.tree, element) == .typed_constant)
|
|
element_type = ast.typed_constant(&state.tree, element).type
|
|
try arraylist.append(&elements, element)
|
|
}
|
|
# empty outer arrays still need concrete, valid child dimensions.
|
|
if (count == 0) {
|
|
child := element_type
|
|
while (!is_type(state, child)) {
|
|
child = try canonical_type(state, child)
|
|
descriptor :: ast.array_type(&state.tree, child)
|
|
value := Value{}
|
|
if (descriptor.count) |length| value = try evaluate(state, length)
|
|
if (value.kind != .integer or value.negative) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_array_length, ast.node_span(&state.tree, child))
|
|
return no_node
|
|
}
|
|
child = descriptor.element
|
|
}
|
|
}
|
|
span :: ast.node_span(&state.tree, expression)
|
|
length :: try ast.add_integer(state.builder, span, u64(count))
|
|
concrete :: try ast.add_array_type(state.builder, ast.node_span(&state.tree, annotation),
|
|
length, element_type, array.mutable)
|
|
literal :: try ast.add_array_literal(state.builder, span, elements.items)
|
|
result :: try ast.add_typed_constant(state.builder, span, concrete, literal)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.type_mismatch, ast.node_span(&state.tree, expression))
|
|
return no_node
|
|
}
|
|
|
|
# rebuild only the indexed path so previous snapshots retain their owned values.
|
|
@hide:file
|
|
type_array_update proc(
|
|
state @mut State, execution @mut TypeExecution, target, root, current, input ast.NodeId,
|
|
) ast.NodeId ! Error {
|
|
# find the outermost index; rebuild its child before copying this parent.
|
|
first := target
|
|
while (true) {
|
|
if (ast.expr_kind(&state.tree, first) != .index) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_assignment_target, ast.node_span(&state.tree, target))
|
|
return no_node
|
|
}
|
|
base :: ast.index_expr(&state.tree, first).base
|
|
if (base == root) break
|
|
first = base
|
|
}
|
|
array :: ast.typed_constant(&state.tree, current)
|
|
descriptor :: ast.array_type(&state.tree, array.type)
|
|
if (!descriptor.mutable) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_index_assignment, ast.node_span(&state.tree, target))
|
|
return no_node
|
|
}
|
|
expression :: try type_snapshot(state, execution, ast.index_expr(&state.tree, first).index)
|
|
if (!try expand_type_matches(state, expression)) return no_node
|
|
count :: ast.array_element_count(&state.tree, array.value)
|
|
index :: try type_array_index(state, expression, count)
|
|
if (index == no_index) return no_node
|
|
previous :: ast.array_element(&state.tree, array.value, index)
|
|
updated := no_node
|
|
if (first == target) updated = try type_execution_value(state, input, descriptor.element)
|
|
else updated = try type_array_update(state, execution, target, first, previous, input)
|
|
if (updated == no_node) return no_node
|
|
elements := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&elements)
|
|
for (0..count) |i| {
|
|
element :: if (i == index) updated else ast.array_element(&state.tree, array.value, i)
|
|
try arraylist.append(&elements, element)
|
|
}
|
|
span :: ast.node_span(&state.tree, target)
|
|
literal :: try ast.add_array_literal(state.builder, span, elements.items)
|
|
result :: try ast.add_typed_constant(state.builder, span, array.type, literal)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
type_execution_value proc(state @mut State, input, annotation ast.NodeId) ast.NodeId ! Error {
|
|
if (annotation == no_node) return no_node
|
|
expression :: try type_value_expression(state, input)
|
|
if (expression == no_node) return no_node
|
|
if (!try expand_type_matches(state, annotation)) return no_node
|
|
# a recursive record needs its cached declaration before expanding its fields.
|
|
if (is_type(state, annotation) and nominal_type_value(state, expression)) {
|
|
concrete :: try materialize(state, Value{ kind = .type, node = expression })
|
|
constraint :: try ast.add_type_operand(state.builder, ast.node_span(&state.tree, expression), concrete.node, true)
|
|
try refresh(state)
|
|
try arraylist.append(&state.rewrites.constraints, constraint)
|
|
return concrete.node
|
|
}
|
|
if (!try expand_type_matches(state, expression)) return no_node
|
|
try expand(state, expression)
|
|
resolved :: binding(state, expression)
|
|
if (resolved.kind == .invalid) {
|
|
state.evaluation_diagnostic = resolved.data.diagnostic
|
|
return no_node
|
|
}
|
|
if (try type_array_storage(state, annotation)) return try type_array_value(state, expression, annotation)
|
|
if (is_type(state, annotation)) {
|
|
if (ast.expr_kind(&state.tree, expression) == .literal_undefined) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.read_before_initialization, ast.node_span(&state.tree, expression))
|
|
return no_node
|
|
}
|
|
value :: try evaluate(state, expression)
|
|
if (value.kind != .type) {
|
|
if (state.evaluation_diagnostic == diagnostics.no_diagnostic)
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.type_mismatch, ast.node_span(&state.tree, expression))
|
|
return no_node
|
|
}
|
|
concrete :: try materialize(state, value)
|
|
constraint :: try ast.add_type_operand(state.builder, ast.node_span(&state.tree, expression), concrete.node, true)
|
|
try refresh(state)
|
|
try arraylist.append(&state.rewrites.constraints, constraint)
|
|
return concrete.node
|
|
}
|
|
value :: try evaluate_ir(state, expression, annotation)
|
|
if (value.kind == .invalid) return no_node
|
|
concrete :: try materialize(state, value)
|
|
result :: try ast.add_typed_constant(state.builder, ast.node_span(&state.tree, expression), annotation, concrete.node)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
# check capture guards with ordinary IR without elaborating either source body.
|
|
@hide:file
|
|
type_capture_guard proc(state @mut State, expression, capture ast.NodeId) Value ! Error {
|
|
resolved :: binding(state, capture)
|
|
if (resolved.kind == .invalid) {
|
|
state.evaluation_diagnostic = resolved.data.diagnostic
|
|
return Value{}
|
|
}
|
|
span :: ast.node_span(&state.tree, expression)
|
|
yes :: try ast.add_boolean(state.builder, span, true)
|
|
no :: try ast.add_boolean(state.builder, span, false)
|
|
taken :: try ast.add_return_stmt(state.builder, span, yes)
|
|
skipped :: try ast.add_return_stmt(state.builder, span, no)
|
|
taken_statements [1]ast.NodeId :: [taken]
|
|
skipped_statements [1]ast.NodeId :: [skipped]
|
|
then_block :: try ast.add_block(state.builder, span, taken_statements[..])
|
|
else_block :: try ast.add_block(state.builder, span, skipped_statements[..])
|
|
selector :: try ast.add_if_stmt(state.builder, span, expression, then_block, else_block)
|
|
ast.set_capture(state.builder, selector, capture)
|
|
statements [1]ast.NodeId :: [selector]
|
|
body :: try ast.add_block(state.builder, span, statements[..])
|
|
try refresh(state)
|
|
return try evaluate_ir_body(state, expression, body, try builtin(state, expression, .bool))
|
|
}
|
|
|
|
# update one owned aggregate through ordinary assignment checking and execution.
|
|
# only the target's root becomes a temporary local; indices and RHS retain their
|
|
# pre-assignment snapshots, and no interpreter storage survives the evaluation.
|
|
@hide:file
|
|
type_assignment_value proc(
|
|
state @mut State, execution @mut TypeExecution, statement ast.NodeId, index usize,
|
|
) ast.NodeId ! Error {
|
|
assignment :: ast.assignment_stmt(&state.tree, statement)
|
|
local :: execution.locals.items[index]
|
|
span :: ast.node_span(&state.tree, statement)
|
|
value :: try type_snapshot(state, execution, assignment.value)
|
|
mutability :: if (ast.node_class(&state.tree, local.declaration) == .statement)
|
|
ast.statement_decl(&state.tree, local.declaration).mutability else ast.Mutability.constant
|
|
temporary :: try ast.add_statement_decl(state.builder, span, span, strpool.no_str,
|
|
local.annotation, mutability, local.value)
|
|
try refresh(state)
|
|
target := no_node
|
|
{
|
|
execution.locals.items[index].value = try reference(state, assignment.target, temporary)
|
|
defer execution.locals.items[index].value = local.value
|
|
target = try type_snapshot(state, execution, assignment.target)
|
|
}
|
|
if (!try expand_type_matches(state, target) or !try expand_type_matches(state, value)) return no_node
|
|
update :: try ast.add_assignment_stmt(state.builder, span, target, value)
|
|
returned :: try ast.add_return_stmt(state.builder, span, try reference(state, statement, temporary))
|
|
statements [3]ast.NodeId :: [temporary, update, returned]
|
|
body :: try ast.add_block(state.builder, span, statements[..])
|
|
try refresh(state)
|
|
result :: try evaluate_ir_body(state, statement, body, local.annotation)
|
|
if (result.kind == .invalid) return no_node
|
|
concrete :: try materialize(state, result)
|
|
owned :: try ast.add_typed_constant(state.builder, span, local.annotation, concrete.node)
|
|
try refresh(state)
|
|
return owned
|
|
}
|
|
|
|
@hide:file
|
|
execute_type_block proc(state @mut State, execution @mut TypeExecution, block ast.NodeId) TypeFlow ! Error {
|
|
saved :: execution.locals.items.len
|
|
defer execution.locals.items = execution.locals.items[..saved]
|
|
for (0..ast.block_statement_count(&state.tree, block)) |i| {
|
|
statement :: ast.block_statement(&state.tree, block, i)
|
|
if (!try type_step(state, statement)) return .invalid
|
|
flow :: try execute_type_statement(state, execution, statement)
|
|
if (flow != .next) return flow
|
|
}
|
|
return .next
|
|
}
|
|
|
|
# substitute selector names without snapshotting away the assignment's root place.
|
|
@hide:file
|
|
type_assignment_target proc(state @mut State, execution @mut TypeExecution, id ast.NodeId) ast.NodeId ! Error {
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
if (kind == .builtin_call) {
|
|
name :: ast.builtin_call(&state.tree, id).name
|
|
if (!mem.eql(ast.source_text(&state.tree, ast.node_span(&state.tree, name)), "field")) return id
|
|
if (ast.call_arg_count(&state.tree, id) != 2) {
|
|
try reject(state, id, .argument_count_mismatch)
|
|
return no_node
|
|
}
|
|
base :: try type_assignment_target(state, execution, ast.call_arg(&state.tree, id, 0))
|
|
if (base == no_node) return no_node
|
|
argument :: try type_snapshot(state, execution, ast.call_arg(&state.tree, id, 1))
|
|
arguments [2]ast.NodeId :: [base, argument]
|
|
result :: try ast.add_builtin_call(state.builder, ast.node_span(&state.tree, id), name, arguments[..])
|
|
try refresh(state)
|
|
try expand(state, result)
|
|
if (binding(state, result).kind == .invalid) return no_node
|
|
return result
|
|
}
|
|
if (kind != .selection and kind != .index) return id
|
|
base :: if (kind == .selection) ast.selection_expr(&state.tree, id).base else ast.index_expr(&state.tree, id).base
|
|
selected :: try type_assignment_target(state, execution, base)
|
|
if (selected == no_node or selected == base) return if (selected == no_node) no_node else id
|
|
result := no_node
|
|
if (kind == .selection)
|
|
result = try ast.add_selection(state.builder, ast.node_span(&state.tree, id),
|
|
selected, ast.selection_expr(&state.tree, id).member)
|
|
else result = try ast.add_index(state.builder, ast.node_span(&state.tree, id),
|
|
selected, ast.index_expr(&state.tree, id).index)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
execute_type_statement proc(state @mut State, execution @mut TypeExecution, statement ast.NodeId) TypeFlow ! Error {
|
|
match ast.stmt_kind(&state.tree, statement) {
|
|
.return_stmt: {
|
|
if (ast.return_stmt(&state.tree, statement).value) |value| {
|
|
expression :: try type_snapshot(state, execution, value)
|
|
execution.returned = try type_execution_value(state, expression, execution.result_type)
|
|
if (execution.returned != no_node
|
|
and !try type_array_initialized(state, execution.returned, value)) return .invalid
|
|
if (execution.returned != no_node) return .returned
|
|
}
|
|
return .invalid
|
|
}
|
|
.declaration: {
|
|
declaration :: ast.statement_decl(&state.tree, statement)
|
|
snapshot :: try type_snapshot(state, execution, declaration.initializer)
|
|
expression :: try type_value_expression(state, snapshot)
|
|
if (expression == no_node) return .invalid
|
|
annotation := no_node
|
|
if (declaration.type) |type| annotation = try type_snapshot(state, execution, type)
|
|
else if (nominal_type_value(state, expression)) annotation = try builtin(state, expression, .type)
|
|
else {
|
|
if (!try expand_type_matches(state, expression)) return .invalid
|
|
try expand(state, expression)
|
|
annotation = try expression_type(state, expression, 0)
|
|
if (annotation == no_node) {
|
|
value :: try evaluate(state, expression)
|
|
if (value.kind == .type) annotation = try builtin(state, expression, .type)
|
|
}
|
|
}
|
|
if (annotation == no_node) return .invalid
|
|
value :: try type_execution_value(state, expression, annotation)
|
|
if (value == no_node) return .invalid
|
|
if (ast.expr_kind(&state.tree, value) == .typed_constant)
|
|
annotation = ast.typed_constant(&state.tree, value).type
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = statement, value = value, annotation = annotation,
|
|
})
|
|
}
|
|
.assignment_stmt: {
|
|
assignment :: ast.assignment_stmt(&state.tree, statement)
|
|
target :: try type_assignment_target(state, execution, assignment.target)
|
|
if (target == no_node) return .invalid
|
|
if (target != assignment.target) {
|
|
normalized :: try ast.add_assignment_stmt(state.builder,
|
|
ast.node_span(&state.tree, statement), target, assignment.value)
|
|
try refresh(state)
|
|
# synthesized places still need local substitution in snapshots.
|
|
previous :: execution.mapping.len
|
|
execution.mapping = try mem.realloc(state.allocator, execution.mapping, ast.node_count(&state.tree))
|
|
mem.set(execution.mapping[previous..], no_node)
|
|
return try execute_type_statement(state, execution, normalized)
|
|
}
|
|
root := assignment.target
|
|
while (true) {
|
|
kind :: ast.expr_kind(&state.tree, root)
|
|
if (kind == .selection and binding(state, root).kind == .none)
|
|
root = ast.selection_expr(&state.tree, root).base
|
|
else if (kind == .index) root = ast.index_expr(&state.tree, root).base
|
|
else break
|
|
}
|
|
resolved :: binding(state, root)
|
|
index := no_index
|
|
if (resolved.kind == .declaration) {
|
|
for (execution.locals.items) |local, i| {
|
|
if (local.declaration == resolved.data.declaration) index = i
|
|
}
|
|
}
|
|
if (
|
|
index == no_index
|
|
or (root == assignment.target
|
|
and (ast.node_class(&state.tree, execution.locals.items[index].declaration) != .statement
|
|
or ast.statement_decl(&state.tree, execution.locals.items[index].declaration).mutability != .variable))
|
|
) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_assignment_target, ast.node_span(&state.tree, assignment.target))
|
|
return .invalid
|
|
}
|
|
if (root != assignment.target) {
|
|
if (try type_array_storage(state, execution.locals.items[index].annotation)) {
|
|
local :: execution.locals.items[index]
|
|
if (
|
|
ast.node_class(&state.tree, local.declaration) != .statement
|
|
or ast.statement_decl(&state.tree, local.declaration).mutability != .variable
|
|
) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics,
|
|
.invalid_index_assignment, ast.node_span(&state.tree, assignment.target))
|
|
return .invalid
|
|
}
|
|
input :: try type_snapshot(state, execution, assignment.value)
|
|
if (!try expand_type_matches(state, input)) return .invalid
|
|
value :: try type_array_update(state, execution, assignment.target, root, local.value, input)
|
|
if (value == no_node) return .invalid
|
|
execution.locals.items[index].value = value
|
|
return .next
|
|
}
|
|
value :: try type_assignment_value(state, execution, statement, index)
|
|
if (value == no_node) return .invalid
|
|
execution.locals.items[index].value = value
|
|
return .next
|
|
}
|
|
expression :: try type_snapshot(state, execution, assignment.value)
|
|
value :: try type_execution_value(state, expression, execution.locals.items[index].annotation)
|
|
if (value == no_node) return .invalid
|
|
execution.locals.items[index].value = value
|
|
}
|
|
.if_stmt, .while_stmt: {
|
|
looping :: ast.stmt_kind(&state.tree, statement) == .while_stmt
|
|
condition := no_node
|
|
body := no_node
|
|
other := no_node
|
|
capture ?ast.NodeId := null
|
|
if (looping) {
|
|
view :: ast.while_stmt(&state.tree, statement)
|
|
capture = view.capture
|
|
condition = view.condition
|
|
body = view.body
|
|
} else {
|
|
view :: ast.if_stmt(&state.tree, statement)
|
|
capture = view.capture
|
|
condition = view.condition
|
|
body = view.then_block
|
|
if (view.else_block) |branch| other = branch
|
|
}
|
|
if (looping) execution.loop_depth += 1
|
|
defer if (looping) execution.loop_depth -= 1
|
|
saved :: execution.locals.items.len
|
|
defer execution.locals.items = execution.locals.items[..saved]
|
|
invariant :: branch_constant(state, condition, 0)
|
|
value := Value{}
|
|
while (true) {
|
|
if (!try type_step(state, condition)) return .invalid
|
|
if (!invariant or value.kind == .invalid) {
|
|
expression :: try type_snapshot(state, execution, condition)
|
|
if (capture) |name| value = try type_capture_guard(state, expression, name)
|
|
else {
|
|
boolean :: try builtin(state, expression, .bool)
|
|
value = try evaluate_ir(state, expression, boolean)
|
|
}
|
|
}
|
|
if (value.kind != .boolean) return .invalid
|
|
if (!value.boolean) {
|
|
if (!looping and other != no_node) return try execute_type_block(state, execution, other)
|
|
return .next
|
|
}
|
|
execution.locals.items = execution.locals.items[..saved]
|
|
if (capture) |name| {
|
|
expression :: try type_snapshot(state, execution, condition)
|
|
unwrapped :: try ast.add_unary(state.builder,
|
|
ast.node_span(&state.tree, condition), .unwrap, expression)
|
|
try refresh(state)
|
|
annotation :: try expression_type(state, unwrapped, 0)
|
|
payload :: try type_execution_value(state, unwrapped, annotation)
|
|
if (payload == no_node) return .invalid
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = name, value = payload, annotation = annotation,
|
|
})
|
|
}
|
|
flow :: try execute_type_block(state, execution, body)
|
|
if (!looping or flow == .returned or flow == .invalid) return flow
|
|
if (flow == .break) return .next
|
|
}
|
|
}
|
|
.expression: {
|
|
expression :: ast.statement_expr(&state.tree, statement)
|
|
if (ast.expr_kind(&state.tree, expression) != .match_expr) return .invalid
|
|
snapshot :: try type_snapshot(state, execution, expression)
|
|
index :: try type_match_arm(state, snapshot)
|
|
if (index == no_index) return .invalid
|
|
arm :: ast.match_arm_view(&state.tree, ast.match_arm(&state.tree, expression, index))
|
|
saved :: execution.locals.items.len
|
|
defer execution.locals.items = execution.locals.items[..saved]
|
|
if (arm.capture) |capture| {
|
|
value :: try type_match_capture(state, snapshot)
|
|
if (value == no_node) return .invalid
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = capture, value = value, annotation = ast.typed_constant(&state.tree, value).type,
|
|
})
|
|
}
|
|
if (!arm.expression) return try execute_type_block(state, execution, arm.body)
|
|
body :: try type_snapshot(state, execution, arm.body)
|
|
value :: try type_value_expression(state, body)
|
|
if (value == no_node) return .invalid
|
|
annotation :: try expression_type(state, value, 0)
|
|
if (try type_execution_value(state, value, annotation) == no_node) return .invalid
|
|
}
|
|
.for_stmt: return try execute_type_for(state, execution, statement)
|
|
.block_stmt: return try execute_type_block(state, execution, ast.statement_block(&state.tree, statement))
|
|
.break_stmt, .continue_stmt: {
|
|
if (execution.loop_depth == 0) {
|
|
code :: if (ast.stmt_kind(&state.tree, statement) == .break_stmt)
|
|
diagnostics.Code.break_outside_loop else diagnostics.Code.continue_outside_loop
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics, code, ast.node_span(&state.tree, statement))
|
|
return .invalid
|
|
}
|
|
return if (ast.stmt_kind(&state.tree, statement) == .break_stmt) TypeFlow.break else TypeFlow.continue
|
|
}
|
|
else: return .invalid
|
|
}
|
|
return .next
|
|
}
|
|
|
|
# retain an array place, but freeze its indices at loop entry. snapshots then read
|
|
# the current owned root after body assignments without re-evaluating the place.
|
|
@hide:file
|
|
type_collection_place proc(state @mut State, execution @mut TypeExecution, id ast.NodeId) ast.NodeId ! Error {
|
|
resolved :: binding(state, id)
|
|
if (resolved.kind == .declaration) {
|
|
for (execution.locals.items) |local| {
|
|
if (local.declaration == resolved.data.declaration) return id
|
|
}
|
|
return no_node
|
|
}
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
if (kind != .selection and kind != .index) return no_node
|
|
base :: if (kind == .selection) ast.selection_expr(&state.tree, id).base else ast.index_expr(&state.tree, id).base
|
|
place :: try type_collection_place(state, execution, base)
|
|
if (place == no_node) return no_node
|
|
result := no_node
|
|
if (kind == .selection) {
|
|
result = try ast.add_selection(state.builder, ast.node_span(&state.tree, id),
|
|
place, ast.selection_expr(&state.tree, id).member)
|
|
} else {
|
|
index :: try type_snapshot(state, execution, ast.index_expr(&state.tree, id).index)
|
|
value :: try type_execution_value(state, index, try builtin(state, index, .usize))
|
|
if (value == no_node) return no_node
|
|
result = try ast.add_index(state.builder, ast.node_span(&state.tree, id), place, value)
|
|
}
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
type_collection_read proc(state @mut State, execution @mut TypeExecution, id ast.NodeId) ast.NodeId ! Error {
|
|
if (binding(state, id).kind == .declaration) return try type_snapshot(state, execution, id)
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
base :: if (kind == .selection) ast.selection_expr(&state.tree, id).base else ast.index_expr(&state.tree, id).base
|
|
value :: try type_collection_read(state, execution, base)
|
|
result := no_node
|
|
if (kind == .selection)
|
|
result = try ast.add_selection(state.builder, ast.node_span(&state.tree, id),
|
|
value, ast.selection_expr(&state.tree, id).member)
|
|
else result = try ast.add_index(state.builder, ast.node_span(&state.tree, id),
|
|
value, ast.index_expr(&state.tree, id).index)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
execute_type_collection proc(state @mut State, execution @mut TypeExecution, statement ast.NodeId) TypeFlow ! Error {
|
|
loop :: ast.for_stmt(&state.tree, statement)
|
|
span :: ast.node_span(&state.tree, statement)
|
|
if (loop.capture) |capture| {
|
|
if (binding(state, capture).kind == .invalid) {
|
|
state.evaluation_diagnostic = binding(state, capture).data.diagnostic
|
|
return .invalid
|
|
}
|
|
}
|
|
if (loop.index) |index| {
|
|
if (binding(state, index).kind == .invalid) {
|
|
state.evaluation_diagnostic = binding(state, index).data.diagnostic
|
|
return .invalid
|
|
}
|
|
}
|
|
snapshot :: try type_snapshot(state, execution, loop.iterable)
|
|
if (!try expand_type_matches(state, snapshot)) return .invalid
|
|
try expand(state, snapshot)
|
|
annotation :: try expression_type(state, snapshot, 0)
|
|
if (annotation == no_node) return .invalid
|
|
collection :: try type_execution_value(state, snapshot, annotation)
|
|
if (collection == no_node) return .invalid
|
|
count := Value{}
|
|
if (try type_array_storage(state, annotation)) {
|
|
count = Value{ kind = .integer,
|
|
magnitude = u64(ast.array_element_count(&state.tree, ast.typed_constant(&state.tree, collection).value)) }
|
|
} else {
|
|
# validate the loop contract even for empty collections, without executing
|
|
# its type-valued body. the synthetic body exits before reading an element.
|
|
stop :: try ast.add_break_stmt(state.builder, span)
|
|
stops [1]ast.NodeId :: [stop]
|
|
body :: try ast.add_block(state.builder, span, stops[..])
|
|
selector :: try ast.add_for_stmt(state.builder, span, collection, loop.capture, loop.index,
|
|
loop.pointer_capture, loop.index_capture, body)
|
|
length := no_node
|
|
if (ast.expr_kind(&state.tree, annotation) == .array_type) length = ast.array_type(&state.tree, annotation).count?
|
|
else {
|
|
value :: try evaluate(state, collection)
|
|
if (value.kind == .string) {
|
|
text :: ast.literal_text(&state.tree, value.node)
|
|
cursor := usize(1)
|
|
size := u64(0)
|
|
while (cursor < text.len - 1) {
|
|
_ = ast.string_next(text, &cursor) catch { return .invalid }
|
|
size += 1
|
|
}
|
|
length = try ast.add_integer(state.builder, span, size)
|
|
} else length = try ast.add_integer(state.builder, span, 0)
|
|
}
|
|
returned :: try ast.add_return_stmt(state.builder, span, length)
|
|
statements [2]ast.NodeId :: [selector, returned]
|
|
wrapper :: try ast.add_block(state.builder, span, statements[..])
|
|
try refresh(state)
|
|
count = try evaluate_ir_body(state, statement, wrapper, try builtin(state, statement, .usize))
|
|
if (count.kind != .integer) return .invalid
|
|
}
|
|
if (loop.pointer_capture and loop.capture != null) {
|
|
state.evaluation_diagnostic = try diagnostics.add(state.diagnostics, .comptime_value_escape, span)
|
|
return .invalid
|
|
}
|
|
place := no_node
|
|
if (ast.expr_kind(&state.tree, annotation) == .array_type)
|
|
place = try type_collection_place(state, execution, loop.iterable)
|
|
if (state.evaluation_diagnostic != diagnostics.no_diagnostic) return .invalid
|
|
saved :: execution.locals.items.len
|
|
defer execution.locals.items = execution.locals.items[..saved]
|
|
execution.loop_depth += 1
|
|
defer execution.loop_depth -= 1
|
|
for (0..usize(count.magnitude)) |i| {
|
|
if (!try type_step(state, statement)) return .invalid
|
|
execution.locals.items = execution.locals.items[..saved]
|
|
index :: try ast.add_integer(state.builder, span, u64(i))
|
|
try refresh(state)
|
|
if (loop.capture) |capture| {
|
|
current := collection
|
|
if (place != no_node) current = try type_collection_read(state, execution, place)
|
|
element :: try ast.add_index(state.builder, span, current, index)
|
|
try refresh(state)
|
|
element_type :: try expression_type(state, element, 0)
|
|
value :: try type_execution_value(state, element, element_type)
|
|
if (value == no_node) return .invalid
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = capture, value = value, annotation = element_type,
|
|
})
|
|
}
|
|
if (loop.index) |capture| {
|
|
type :: try builtin(state, capture, .usize)
|
|
value :: try type_execution_value(state, index, type)
|
|
if (value == no_node) return .invalid
|
|
try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = capture, value = value, annotation = type,
|
|
})
|
|
}
|
|
flow :: try execute_type_block(state, execution, loop.body)
|
|
if (flow == .returned or flow == .invalid) return flow
|
|
if (flow == .break) return .next
|
|
}
|
|
return .next
|
|
}
|
|
|
|
@hide:file
|
|
execute_type_for proc(state @mut State, execution @mut TypeExecution, statement ast.NodeId) TypeFlow ! Error {
|
|
loop :: ast.for_stmt(&state.tree, statement)
|
|
if (ast.expr_kind(&state.tree, loop.iterable) != .range)
|
|
return try execute_type_collection(state, execution, statement)
|
|
if (loop.pointer_capture or loop.index_capture) return .invalid
|
|
bounds :: ast.range_expr(&state.tree, loop.iterable)
|
|
start :: try type_snapshot(state, execution, bounds.start)
|
|
end :: try type_snapshot(state, execution, bounds.end)
|
|
typed_bound :: if (flexible(state, start)) end else start
|
|
annotation :: try expression_type(state, typed_bound, 0)
|
|
if (annotation == no_node or !try integer_type(state, annotation)) return .invalid
|
|
current := try type_execution_value(state, start, annotation)
|
|
limit :: try type_execution_value(state, end, annotation)
|
|
if (current == no_node or limit == no_node) return .invalid
|
|
saved :: execution.locals.items.len
|
|
defer execution.locals.items = execution.locals.items[..saved]
|
|
if (loop.capture) |capture| try arraylist.append(&execution.locals, TypeLocal{
|
|
declaration = capture, value = current, annotation = annotation,
|
|
})
|
|
execution.loop_depth += 1
|
|
defer execution.loop_depth -= 1
|
|
while (true) {
|
|
if (!try type_step(state, statement)) return .invalid
|
|
span :: ast.node_span(&state.tree, statement)
|
|
operator ast.BinaryOperator :: if (bounds.inclusive) .less_equal else .less
|
|
comparison :: try ast.add_binary(state.builder, span, operator, current, limit)
|
|
try refresh(state)
|
|
keep :: try evaluate(state, comparison)
|
|
if (keep.kind != .boolean) return .invalid
|
|
if (!keep.boolean) return .next
|
|
if (loop.capture != null) execution.locals.items[saved].value = current
|
|
flow :: try execute_type_block(state, execution, loop.body)
|
|
if (flow == .returned or flow == .invalid) return flow
|
|
if (flow == .break) return .next
|
|
if (try value_equal(state, try evaluate(state, current), try evaluate(state, limit))) return .next
|
|
one :: try ast.add_integer(state.builder, span, 1)
|
|
increment :: try ast.add_binary(state.builder, span, .add, current, one)
|
|
try refresh(state)
|
|
current = try type_execution_value(state, increment, annotation)
|
|
if (current == no_node) return .invalid
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
mix proc(left, right usize) usize {
|
|
return (left << 7) xor (left >> (sizeof!(usize) * 8 - 7)) xor right
|
|
}
|
|
|
|
@hide:file
|
|
evaluate proc(state @mut State, id ast.NodeId) Value ! Error {
|
|
if (state.depth >= 128) return Value{}
|
|
state.depth += 1
|
|
defer state.depth -= 1
|
|
try expand(state, id)
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
resolved :: binding(state, id)
|
|
if (resolved.kind == .builtin and resolved.data.builtin != .type) return Value{ kind = .type, node = id }
|
|
if (resolved.kind == .declaration) {
|
|
target :: resolved.data.declaration
|
|
class :: ast.node_class(&state.tree, target)
|
|
if (class == .function) {
|
|
if (template(state, target)) return Value{}
|
|
return Value{ kind = .function, node = id }
|
|
}
|
|
if (class == .statement) {
|
|
declaration :: ast.statement_decl(&state.tree, target)
|
|
if (declaration.mutability != .constant) return Value{}
|
|
value := try evaluate(state, declaration.initializer)
|
|
if (declaration.type) |annotation| value.annotation = annotation
|
|
return value
|
|
}
|
|
return Value{}
|
|
}
|
|
match kind {
|
|
.typed_constant: {
|
|
view :: ast.typed_constant(&state.tree, id)
|
|
value := try evaluate_expected(state, view.value, view.type)
|
|
value.annotation = view.type
|
|
return value
|
|
}
|
|
.literal_int: {
|
|
value := u64(0)
|
|
for ast.literal_text(&state.tree, id) |byte| {
|
|
if (byte < '0' or byte > '9') return Value{}
|
|
digit :: u64(byte - '0')
|
|
if (value > divtrunc!(maxval!(u64) - digit, u64(10))) return Value{}
|
|
value = value * 10 + digit
|
|
}
|
|
return Value{ kind = .integer, node = id, magnitude = value }
|
|
}
|
|
.literal_float: {
|
|
if (ast.float_value(&state.tree, id)) |value| return Value{
|
|
kind = .real, node = id, magnitude = ptrcast!(@u64, &value)^,
|
|
}
|
|
return try evaluate_ir(state, id, try builtin(state, id, .float))
|
|
}
|
|
.literal_bool: return Value{ kind = .boolean, node = id,
|
|
boolean = mem.eql(ast.literal_text(&state.tree, id), "true") }
|
|
.literal_string: {
|
|
text :: ast.literal_text(&state.tree, id)
|
|
cursor := usize(1)
|
|
while (cursor < text.len - 1) {
|
|
_ = ast.string_next(text, &cursor) catch {
|
|
try reject(state, id, .invalid_escape)
|
|
return Value{}
|
|
}
|
|
}
|
|
return Value{ kind = .string, node = id }
|
|
}
|
|
.literal_null: return Value{ kind = .null, node = id }
|
|
.literal_void: return Value{ kind = .aggregate, node = id, annotation = try builtin(state, id, .void) }
|
|
.record_type, .array_type, .slice_type, .pointer_type, .function_type, .optional_type,
|
|
.enum_type, .union_type, .distinct_type, .fallible_type, .sum_type:
|
|
return Value{ kind = .type, node = id }
|
|
.alias_expr: return try evaluate(state, ast.type_operand(&state.tree, id))
|
|
.unary: {
|
|
view :: ast.unary_expr(&state.tree, id)
|
|
value := try evaluate(state, view.operand)
|
|
if (view.operator == .negate and value.kind == .integer) value.negative = value.magnitude != 0 and !value.negative
|
|
else if (view.operator == .negate and value.kind == .real) value.magnitude = value.magnitude xor (u64(1) << 63)
|
|
else if (view.operator == .logical_not and value.kind == .boolean) value.boolean = !value.boolean
|
|
else return Value{}
|
|
value.node = id
|
|
return value
|
|
}
|
|
.binary: return try evaluate_binary(state, id)
|
|
.call: return try evaluate_call(state, id)
|
|
.record_literal, .array_literal, .selection, .index, .match_expr, .builtin_call, .catch_expr:
|
|
return try evaluate_ir(state, id, try expression_type(state, id, 0))
|
|
else: return Value{}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
evaluate_binary proc(state @mut State, id ast.NodeId) Value ! Error {
|
|
view :: ast.binary_expr(&state.tree, id)
|
|
if (view.operator == .divide) return try evaluate_ir(state, id, try builtin(state, id, .float))
|
|
left :: try evaluate(state, view.left)
|
|
if (left.kind == .invalid) return Value{}
|
|
if (left.kind == .boolean) {
|
|
if (view.operator == .logical_and and !left.boolean) return Value{ kind = .boolean, node = id, boolean = false }
|
|
if (view.operator == .logical_or and left.boolean) return Value{ kind = .boolean, node = id, boolean = true }
|
|
}
|
|
right := try evaluate(state, view.right)
|
|
if (left.kind == .invalid or right.kind == .invalid) return Value{}
|
|
if (left.kind == .real or right.kind == .real) {
|
|
boolean :: (
|
|
view.operator == .equal or view.operator == .not_equal or view.operator == .less
|
|
or view.operator == .less_equal or view.operator == .greater or view.operator == .greater_equal
|
|
)
|
|
kind sema.BuiltinType :: if (boolean) .bool else .float
|
|
result_type :: try builtin(state, id, kind)
|
|
return try evaluate_ir(state, id, result_type)
|
|
}
|
|
if (
|
|
left.annotation != no_node and right.annotation != no_node
|
|
and left.kind == .integer and right.kind == .integer
|
|
and !try same_type(state, left.annotation, right.annotation)
|
|
) return Value{}
|
|
if (view.operator == .equal or view.operator == .not_equal) {
|
|
if (left.kind != right.kind) return Value{}
|
|
equal :: try value_equal(state, left, right)
|
|
if (left.kind == .type) {
|
|
operands [2]ast.NodeId :: [view.left, view.right]
|
|
for (operands) |operand| {
|
|
constraint :: try ast.add_type_operand(state.builder,
|
|
ast.node_span(&state.tree, operand), operand, true)
|
|
try refresh(state)
|
|
try arraylist.append(&state.rewrites.constraints, constraint)
|
|
}
|
|
folded :: try ast.add_boolean(state.builder, ast.node_span(&state.tree, id),
|
|
equal == (view.operator == .equal))
|
|
try replace(state, id, folded)
|
|
try refresh(state)
|
|
}
|
|
return Value{ kind = .boolean, node = id, boolean = equal == (view.operator == .equal) }
|
|
}
|
|
if (left.kind == .boolean and right.kind == .boolean) {
|
|
if (view.operator == .logical_and) return Value{ kind = .boolean, node = id, boolean = left.boolean and right.boolean }
|
|
if (view.operator == .logical_or) return Value{ kind = .boolean, node = id, boolean = left.boolean or right.boolean }
|
|
return Value{}
|
|
}
|
|
if (left.kind != .integer or right.kind != .integer) return Value{}
|
|
annotation :: if (left.annotation != no_node) left.annotation else right.annotation
|
|
less :: if (left.negative != right.negative) left.negative
|
|
else if (left.negative) left.magnitude > right.magnitude else left.magnitude < right.magnitude
|
|
equal :: left.magnitude == right.magnitude and left.negative == right.negative
|
|
match view.operator {
|
|
.less: return Value{ kind = .boolean, node = id, boolean = less }
|
|
.less_equal: return Value{ kind = .boolean, node = id, boolean = less or equal }
|
|
.greater: return Value{ kind = .boolean, node = id, boolean = !less and !equal }
|
|
.greater_equal: return Value{ kind = .boolean, node = id, boolean = !less }
|
|
.multiply: {
|
|
if (right.magnitude != 0 and left.magnitude > divtrunc!(maxval!(u64), right.magnitude)) return Value{}
|
|
magnitude :: left.magnitude * right.magnitude
|
|
return try integer_value(state, id, magnitude, magnitude != 0 and left.negative != right.negative, annotation)
|
|
}
|
|
.add, .subtract: {
|
|
if (view.operator == .subtract and right.magnitude != 0) right.negative = !right.negative
|
|
if (left.negative == right.negative) {
|
|
if (left.magnitude > maxval!(u64) - right.magnitude) return Value{}
|
|
return try integer_value(state, id, left.magnitude + right.magnitude, left.negative, annotation)
|
|
}
|
|
if (left.magnitude < right.magnitude) return try integer_value(state, id, right.magnitude - left.magnitude, right.negative, annotation)
|
|
return try integer_value(state, id, left.magnitude - right.magnitude,
|
|
left.magnitude != right.magnitude and left.negative, annotation)
|
|
}
|
|
else: return Value{}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
canonical_type proc(state @mut State, id ast.NodeId) ast.NodeId ! Error {
|
|
value :: try evaluate(state, id)
|
|
return if (value.kind == .type) value.node else no_node
|
|
}
|
|
|
|
@hide:file
|
|
same_type proc(state @mut State, left, right ast.NodeId) bool ! Error {
|
|
if (is_type(state, left) or is_type(state, right))
|
|
return is_type(state, left) and is_type(state, right)
|
|
a :: try canonical_type(state, left)
|
|
b :: try canonical_type(state, right)
|
|
if (a == no_node or b == no_node) return false
|
|
if (a == b) return true
|
|
x :: binding(state, a)
|
|
y :: binding(state, b)
|
|
if (x.kind == .builtin or y.kind == .builtin) return x.kind == .builtin and y.kind == .builtin and builtin_identity(x.data.builtin) == builtin_identity(y.data.builtin)
|
|
kind :: ast.expr_kind(&state.tree, a)
|
|
if (kind == .sum_type or ast.expr_kind(&state.tree, b) == .sum_type)
|
|
return try type_subset(state, a, b) and try type_subset(state, b, a)
|
|
if (kind != ast.expr_kind(&state.tree, b)) return false
|
|
match kind {
|
|
.pointer_type: {
|
|
p :: ast.pointer_type(&state.tree, a)
|
|
q :: ast.pointer_type(&state.tree, b)
|
|
return p.mutable == q.mutable and p.many == q.many and try same_type(state, p.element, q.element)
|
|
}
|
|
.array_type: {
|
|
p :: ast.array_type(&state.tree, a)
|
|
q :: ast.array_type(&state.tree, b)
|
|
if (p.mutable != q.mutable or p.count == null or q.count == null) return false
|
|
pv :: try evaluate(state, p.count?)
|
|
qv :: try evaluate(state, q.count?)
|
|
return try value_equal(state, pv, qv) and try same_type(state, p.element, q.element)
|
|
}
|
|
.slice_type: {
|
|
p :: ast.slice_type(&state.tree, a)
|
|
q :: ast.slice_type(&state.tree, b)
|
|
if (p.mutable != q.mutable or (p.sentinel == null) != (q.sentinel == null)) return false
|
|
if (p.sentinel) |sentinel| {
|
|
if (!try value_equal(state, try evaluate(state, sentinel), try evaluate(state, q.sentinel?))) return false
|
|
}
|
|
return try same_type(state, p.element, q.element)
|
|
}
|
|
.optional_type: return try same_type(state, ast.type_operand(&state.tree, a), ast.type_operand(&state.tree, b))
|
|
.fallible_type: {
|
|
p :: ast.binary_expr(&state.tree, a)
|
|
q :: ast.binary_expr(&state.tree, b)
|
|
return try same_type(state, p.left, q.left) and try same_type(state, p.right, q.right)
|
|
}
|
|
.function_type: {
|
|
count :: ast.function_param_count(&state.tree, a)
|
|
if (count != ast.function_param_count(&state.tree, b)) return false
|
|
if (!try same_type(state, ast.callable_result(&state.tree, a), ast.callable_result(&state.tree, b))) return false
|
|
for (0..count) |i| {
|
|
p :: ast.param(&state.tree, ast.function_param(&state.tree, a, i)).type
|
|
q :: ast.param(&state.tree, ast.function_param(&state.tree, b, i)).type
|
|
if (!try same_type(state, p, q)) return false
|
|
}
|
|
return true
|
|
}
|
|
else: return false
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
type_subset proc(state @mut State, left, right ast.NodeId) bool ! Error {
|
|
a :: try canonical_type(state, left)
|
|
b :: try canonical_type(state, right)
|
|
if (a == no_node or b == no_node) return false
|
|
if (ast.expr_kind(&state.tree, a) == .sum_type) {
|
|
view :: ast.binary_expr(&state.tree, a)
|
|
return try type_subset(state, view.left, b) and try type_subset(state, view.right, b)
|
|
}
|
|
if (ast.expr_kind(&state.tree, b) == .sum_type) {
|
|
view :: ast.binary_expr(&state.tree, b)
|
|
return try type_subset(state, a, view.left) or try type_subset(state, a, view.right)
|
|
}
|
|
return try same_type(state, a, b)
|
|
}
|
|
|
|
@hide:file
|
|
value_equal proc(state @mut State, left, right Value) bool ! Error {
|
|
if (left.kind != right.kind) return false
|
|
return match left.kind {
|
|
.invalid, .null: true
|
|
.type: try same_type(state, left.node, right.node)
|
|
.integer: left.magnitude == right.magnitude and left.negative == right.negative
|
|
.boolean: left.boolean == right.boolean
|
|
.function: binding(state, left.node).data.declaration == binding(state, right.node).data.declaration
|
|
.real: left.magnitude == right.magnitude
|
|
.aggregate: (
|
|
try same_type(state, left.annotation, right.annotation)
|
|
and try constant_equal(state, left.node, right.node)
|
|
)
|
|
.string: try same_string(state, left.node, right.node)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
value_hash proc(state @mut State, value Value) usize ! Error {
|
|
hash :: enum_index(value.kind)
|
|
negative :: if (value.negative) usize(1) else usize(0)
|
|
boolean :: if (value.boolean) usize(1) else usize(0)
|
|
return match value.kind {
|
|
.type: mix(hash, try type_hash(state, value.node))
|
|
.integer: mix(mix(hash, usize(value.magnitude)), negative)
|
|
.boolean: mix(hash, boolean)
|
|
.function: mix(hash, usize(binding(state, value.node).data.declaration))
|
|
.string: string_hash(hash, ast.literal_text(&state.tree, value.node))
|
|
.real: mix(hash, usize(value.magnitude))
|
|
.aggregate: mix(mix(hash, try type_hash(state, value.annotation)), try constant_hash(state, value.node))
|
|
.invalid, .null: hash
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
string_hash proc(seed usize, text []u8) usize {
|
|
result := seed
|
|
cursor := usize(1)
|
|
while (cursor < text.len - 1) {
|
|
byte :: ast.string_next(text, &cursor) catch { return 0 }
|
|
result = mix(result, usize(byte))
|
|
}
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
type_hash proc(state @mut State, id ast.NodeId) usize ! Error {
|
|
node :: try canonical_type(state, id)
|
|
if (node == no_node) return 0
|
|
resolved :: binding(state, node)
|
|
if (resolved.kind == .builtin) return mix(1, enum_index(builtin_identity(resolved.data.builtin)))
|
|
kind :: ast.expr_kind(&state.tree, node)
|
|
hash := enum_index(kind)
|
|
match kind {
|
|
.pointer_type: {
|
|
view :: ast.pointer_type(&state.tree, node)
|
|
mutable :: if (view.mutable) usize(1) else usize(0)
|
|
many :: if (view.many) usize(1) else usize(0)
|
|
hash = mix(hash, mutable)
|
|
hash = mix(hash, many)
|
|
return mix(hash, try type_hash(state, view.element))
|
|
}
|
|
.array_type: {
|
|
view :: ast.array_type(&state.tree, node)
|
|
mutable :: if (view.mutable) usize(1) else usize(0)
|
|
hash = mix(hash, mutable)
|
|
if (view.count) |count| hash = mix(hash, try value_hash(state, try evaluate(state, count)))
|
|
return mix(hash, try type_hash(state, view.element))
|
|
}
|
|
.slice_type: {
|
|
view :: ast.slice_type(&state.tree, node)
|
|
mutable :: if (view.mutable) usize(1) else usize(0)
|
|
hash = mix(hash, mutable)
|
|
if (view.sentinel) |sentinel| hash = mix(hash, try value_hash(state, try evaluate(state, sentinel)))
|
|
return mix(hash, try type_hash(state, view.element))
|
|
}
|
|
.optional_type: return mix(hash, try type_hash(state, ast.type_operand(&state.tree, node)))
|
|
.sum_type: {
|
|
view :: ast.binary_expr(&state.tree, node)
|
|
# set fingerprints must ignore ordering, grouping and repeated members.
|
|
# colliding fingerprints still use full type equality in the cache chain.
|
|
return try type_hash(state, view.left) | try type_hash(state, view.right)
|
|
}
|
|
.fallible_type: {
|
|
view :: ast.binary_expr(&state.tree, node)
|
|
return mix(mix(hash, try type_hash(state, view.left)), try type_hash(state, view.right))
|
|
}
|
|
.function_type: {
|
|
hash = mix(hash, try type_hash(state, ast.callable_result(&state.tree, node)))
|
|
for (0..ast.function_param_count(&state.tree, node)) |i| {
|
|
parameter :: ast.function_param(&state.tree, node, i)
|
|
hash = mix(hash, try type_hash(state, ast.param(&state.tree, parameter).type))
|
|
}
|
|
return hash
|
|
}
|
|
else: return mix(hash, usize(node))
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
expression_type proc(state @mut State, id ast.NodeId, depth usize) ast.NodeId ! Error {
|
|
if (depth >= 128) return no_node
|
|
try expand(state, id)
|
|
resolved :: binding(state, id)
|
|
if (resolved.kind == .builtin and resolved.data.builtin != .type) return try builtin(state, id, .type)
|
|
if (resolved.kind == .declaration) {
|
|
target :: resolved.data.declaration
|
|
class :: ast.node_class(&state.tree, target)
|
|
if (class == .parameter) {
|
|
annotation :: ast.param(&state.tree, target).type
|
|
return try canonical_type(state, annotation)
|
|
}
|
|
if (class == .statement) {
|
|
declaration :: ast.statement_decl(&state.tree, target)
|
|
if (declaration.type) |annotation| return try canonical_type(state, annotation)
|
|
return try expression_type(state, declaration.initializer, depth + 1)
|
|
}
|
|
if (class == .function) {
|
|
params := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(¶ms)
|
|
for (0..ast.function_param_count(&state.tree, target)) |i|
|
|
try arraylist.append(¶ms, ast.function_param(&state.tree, target, i))
|
|
result :: try ast.add_function_type(state.builder, ast.node_span(&state.tree, id),
|
|
ast.function_decl(&state.tree, target).return_type, params.items)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
return no_node
|
|
}
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
match kind {
|
|
.record_type, .array_type, .slice_type, .pointer_type, .function_type, .optional_type,
|
|
.enum_type, .union_type, .distinct_type, .fallible_type, .sum_type, .alias_expr:
|
|
return try builtin(state, id, .type)
|
|
.typed_constant: return try canonical_type(state, ast.typed_constant(&state.tree, id).type)
|
|
.literal_int: return try builtin(state, id, .i64)
|
|
.literal_float: return try builtin(state, id, .f64)
|
|
.literal_bool: return try builtin(state, id, .bool)
|
|
.literal_string: return try builtin(state, id, .string)
|
|
.literal_void: return try builtin(state, id, .void)
|
|
.catch_expr: {
|
|
type :: try expression_type(state, ast.catch_expr(&state.tree, id).operand, depth + 1)
|
|
if (type == no_node or ast.expr_kind(&state.tree, type) != .fallible_type) return no_node
|
|
return try canonical_type(state, ast.binary_expr(&state.tree, type).left)
|
|
}
|
|
.record_literal: {
|
|
view :: ast.record_literal(&state.tree, id)
|
|
if (view.type) |annotation| return try canonical_type(state, annotation)
|
|
fields := arraylist.init(ast.NodeId, state.allocator)
|
|
defer arraylist.deinit(&fields)
|
|
for (0..ast.record_field_count(&state.tree, id)) |i| {
|
|
field :: ast.field(&state.tree, ast.record_field(&state.tree, id, i))
|
|
if (field.value == null) return no_node
|
|
type :: try expression_type(state, field.value?, depth + 1)
|
|
if (type == no_node) return no_node
|
|
generated :: try ast.add_field(state.builder, field.span, field.name, type, null)
|
|
try refresh(state)
|
|
try arraylist.append(&fields, generated)
|
|
}
|
|
result :: try ast.add_record_type(state.builder, ast.node_span(&state.tree, id), fields.items)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
.array_literal: {
|
|
count :: ast.array_element_count(&state.tree, id)
|
|
if (count == 0) return no_node
|
|
element :: try expression_type(state, ast.array_element(&state.tree, id, 0), depth + 1)
|
|
if (element == no_node) return no_node
|
|
length :: try ast.add_integer(state.builder, ast.node_span(&state.tree, id), u64(count))
|
|
try refresh(state)
|
|
result :: try ast.add_array_type(state.builder, ast.node_span(&state.tree, id), length, element, false)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
.call: {
|
|
callee :: ast.call_expr(&state.tree, id).callee
|
|
destination :: binding(state, callee)
|
|
if (destination.kind == .builtin) return callee
|
|
if (destination.kind == .declaration and ast.node_class(&state.tree, destination.data.declaration) == .function) return try canonical_type(state, ast.function_decl(&state.tree, destination.data.declaration).return_type)
|
|
signature :: try expression_type(state, callee, depth + 1)
|
|
if (signature != no_node and ast.expr_kind(&state.tree, signature) == .function_type)
|
|
return try canonical_type(state, ast.callable_result(&state.tree, signature))
|
|
return no_node
|
|
}
|
|
.unary: {
|
|
view :: ast.unary_expr(&state.tree, id)
|
|
operand :: try expression_type(state, view.operand, depth + 1)
|
|
if (operand == no_node) return no_node
|
|
if (view.operator == .address_of) {
|
|
mutable := false
|
|
target :: binding(state, view.operand)
|
|
if (target.kind == .declaration and ast.node_class(&state.tree, target.data.declaration) == .statement)
|
|
mutable = ast.statement_decl(&state.tree, target.data.declaration).mutability == .variable
|
|
result :: try ast.add_pointer_type(state.builder, view.span, operand, mutable, false)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
if (view.operator == .dereference and ast.expr_kind(&state.tree, operand) == .pointer_type)
|
|
return try canonical_type(state, ast.pointer_type(&state.tree, operand).element)
|
|
if (view.operator == .unwrap and ast.expr_kind(&state.tree, operand) == .optional_type)
|
|
return try canonical_type(state, ast.type_operand(&state.tree, operand))
|
|
return operand
|
|
}
|
|
.binary: {
|
|
view :: ast.binary_expr(&state.tree, id)
|
|
if (
|
|
view.operator == .equal or view.operator == .not_equal or view.operator == .less
|
|
or view.operator == .less_equal or view.operator == .greater or view.operator == .greater_equal
|
|
or view.operator == .logical_and or view.operator == .logical_or
|
|
) return try builtin(state, id, .bool)
|
|
return try expression_type(state, view.left, depth + 1)
|
|
}
|
|
.selection: {
|
|
view :: ast.selection_expr(&state.tree, id)
|
|
base := try expression_type(state, view.base, depth + 1)
|
|
if (base == no_node) return no_node
|
|
if (ast.expr_kind(&state.tree, base) == .pointer_type) base = try canonical_type(state, ast.pointer_type(&state.tree, base).element)
|
|
if (base == no_node) return no_node
|
|
member :: ast.literal_text(&state.tree, view.member)
|
|
base_kind :: ast.expr_kind(&state.tree, base)
|
|
if (
|
|
mem.eql(member, "len") and (
|
|
base_kind == .array_type or base_kind == .slice_type
|
|
or (binding(state, base).kind == .builtin and binding(state, base).data.builtin == .string)
|
|
)
|
|
)
|
|
return try builtin(state, id, .usize)
|
|
if (base_kind != .record_type and base_kind != .union_type) return no_node
|
|
for (0..ast.record_field_count(&state.tree, base)) |i| {
|
|
field :: ast.field(&state.tree, ast.record_field(&state.tree, base, i))
|
|
if (field.name) |name| {
|
|
if (ast.name_id(&state.tree, name) == ast.name_id(&state.tree, view.member))
|
|
return try canonical_type(state, field.type?)
|
|
}
|
|
}
|
|
return no_node
|
|
}
|
|
.index: {
|
|
view :: ast.index_expr(&state.tree, id)
|
|
base :: try expression_type(state, view.base, depth + 1)
|
|
if (base == no_node) return no_node
|
|
base_kind :: ast.expr_kind(&state.tree, base)
|
|
if (base_kind == .array_type) {
|
|
element :: ast.array_type(&state.tree, base).element
|
|
return if (is_type(state, element)) element else try canonical_type(state, element)
|
|
}
|
|
if (base_kind == .slice_type) return try canonical_type(state, ast.slice_type(&state.tree, base).element)
|
|
if (base_kind == .pointer_type) return try canonical_type(state, ast.pointer_type(&state.tree, base).element)
|
|
if (binding(state, base).kind == .builtin and binding(state, base).data.builtin == .string) return try builtin(state, id, .u8)
|
|
return no_node
|
|
}
|
|
.slice: {
|
|
view :: ast.slice_expr(&state.tree, id)
|
|
base :: try expression_type(state, view.base, depth + 1)
|
|
if (base == no_node) return no_node
|
|
base_kind :: ast.expr_kind(&state.tree, base)
|
|
element := no_node
|
|
mutable := false
|
|
if (base_kind == .array_type) {
|
|
element = ast.array_type(&state.tree, base).element
|
|
mutable = ast.array_type(&state.tree, base).mutable
|
|
}
|
|
if (base_kind == .pointer_type) {
|
|
element = ast.pointer_type(&state.tree, base).element
|
|
mutable = ast.pointer_type(&state.tree, base).mutable
|
|
}
|
|
if (base_kind == .slice_type) {
|
|
element = ast.slice_type(&state.tree, base).element
|
|
mutable = ast.slice_type(&state.tree, base).mutable
|
|
}
|
|
if (element == no_node) return no_node
|
|
result :: try ast.add_slice_type(state.builder, ast.node_span(&state.tree, id), element, mutable, null)
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
else: return no_node
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
parameter_index proc(state @State, function, id ast.NodeId) usize {
|
|
for (0..ast.function_param_count(&state.tree, function)) |i| {
|
|
if (ast.function_param(&state.tree, function, i) == id and ast.param(&state.tree, id).comptime) return i
|
|
}
|
|
return no_index
|
|
}
|
|
|
|
@hide:file
|
|
infer_value proc(state @mut State, function, pattern ast.NodeId, actual Value, arguments []mut Value, contextual bool) bool ! Error {
|
|
resolved :: binding(state, pattern)
|
|
if (resolved.kind == .declaration) {
|
|
index :: parameter_index(state, function, resolved.data.declaration)
|
|
if (index != no_index) {
|
|
if (arguments[index].kind == .invalid) {
|
|
arguments[index] = actual
|
|
return true
|
|
}
|
|
if (contextual and arguments[index].kind == .type and actual.kind == .type) return true
|
|
return try value_equal(state, arguments[index], actual)
|
|
}
|
|
}
|
|
return try value_equal(state, try evaluate(state, pattern), actual)
|
|
}
|
|
|
|
@hide:file
|
|
infer proc(state @mut State, function, pattern, actual ast.NodeId, arguments []mut Value, contextual bool) bool ! Error {
|
|
resolved :: binding(state, pattern)
|
|
if (resolved.kind == .declaration and parameter_index(state, function, resolved.data.declaration) != no_index)
|
|
return try infer_value(state, function, pattern, Value{ kind = .type, node = actual }, arguments, contextual)
|
|
kind :: ast.expr_kind(&state.tree, pattern)
|
|
actual_kind :: ast.expr_kind(&state.tree, actual)
|
|
match kind {
|
|
.pointer_type: {
|
|
if (actual_kind != .pointer_type) return false
|
|
return try infer(state, function, ast.pointer_type(&state.tree, pattern).element,
|
|
ast.pointer_type(&state.tree, actual).element, arguments, contextual)
|
|
}
|
|
.slice_type: {
|
|
element := no_node
|
|
if (actual_kind == .slice_type) element = ast.slice_type(&state.tree, actual).element
|
|
if (actual_kind == .array_type) element = ast.array_type(&state.tree, actual).element
|
|
if (element == no_node) return false
|
|
return try infer(state, function, ast.slice_type(&state.tree, pattern).element, element, arguments, contextual)
|
|
}
|
|
.array_type: {
|
|
if (actual_kind != .array_type) return false
|
|
p :: ast.array_type(&state.tree, pattern)
|
|
a :: ast.array_type(&state.tree, actual)
|
|
if (p.count) |count| {
|
|
if (a.count == null or !try infer_value(state, function, count, try evaluate(state, a.count?), arguments, false)) return false
|
|
}
|
|
return try infer(state, function, p.element, a.element, arguments, contextual)
|
|
}
|
|
.optional_type: {
|
|
element :: if (actual_kind == .optional_type) ast.type_operand(&state.tree, actual) else actual
|
|
return try infer(state, function, ast.type_operand(&state.tree, pattern), element, arguments, contextual)
|
|
}
|
|
.call: {
|
|
callee :: binding(state, ast.call_expr(&state.tree, pattern).callee)
|
|
if (callee.kind != .declaration) return false
|
|
for (0..(state.instances.items.len)) |i| {
|
|
instance :: state.instances.items[i]
|
|
if (instance.type == no_node or instance.function != callee.data.declaration) continue
|
|
if (try canonical_type(state, instance.type) != actual) continue
|
|
count :: ast.call_arg_count(&state.tree, pattern)
|
|
if (count != instance.arguments.len) return false
|
|
for (0..count) |j| {
|
|
if (!try infer_value(state, function, ast.call_arg(&state.tree, pattern, j), instance.arguments[j], arguments, contextual)) return false
|
|
}
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
else: return true
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
materialize proc(state @mut State, value Value) Value ! Error {
|
|
result := value
|
|
span :: ast.node_span(&state.tree, value.node)
|
|
if (value.kind == .type and nominal_type_value(state, value.node)) {
|
|
# refer to declared nominal types, rather than reusing their definition as
|
|
# an annotation and turning its value-role checker cell into an annotation.
|
|
for (state.declarations.items) |declaration| {
|
|
if (
|
|
ast.node_class(&state.tree, declaration) == .statement
|
|
and ast.statement_decl(&state.tree, declaration).initializer == value.node
|
|
) {
|
|
result.node = try reference(state, value.node, declaration)
|
|
return result
|
|
}
|
|
}
|
|
}
|
|
if (value.kind == .integer) {
|
|
result.node = try ast.add_integer(state.builder, span, value.magnitude)
|
|
if (value.negative) result.node = try ast.add_unary(state.builder, span, .negate, result.node)
|
|
} else if (value.kind == .boolean) {
|
|
result.node = try ast.add_boolean(state.builder, span, value.boolean)
|
|
} else if (value.kind == .real) {
|
|
result.node = try ast.add_float(state.builder, span, ptrcast!(@f64, &value.magnitude)^)
|
|
}
|
|
try refresh(state)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
valid_value proc(state @mut State, annotation ast.NodeId, value Value) bool ! Error {
|
|
type :: try canonical_type(state, annotation)
|
|
if (type == no_node) return false
|
|
resolved :: binding(state, type)
|
|
if (resolved.kind == .builtin) {
|
|
kind :: resolved.data.builtin
|
|
if (kind == .bool) return value.kind == .boolean
|
|
if (kind == .string) return value.kind == .string
|
|
if (kind == .float or kind == .f64) return value.kind == .real
|
|
if (kind == .void) return (
|
|
value.kind == .aggregate and value.annotation != no_node
|
|
and try same_type(state, type, value.annotation)
|
|
)
|
|
if (value.kind != .integer) return false
|
|
bits := u32(64)
|
|
signed := false
|
|
match kind {
|
|
.i8, .c_char: {
|
|
bits = 8
|
|
signed = true
|
|
}
|
|
.i16, .c_short: {
|
|
bits = 16
|
|
signed = true
|
|
}
|
|
.i32, .c_int: {
|
|
bits = 32
|
|
signed = true
|
|
}
|
|
.int, .i64, .isize, .c_long, .c_longlong: signed = true
|
|
.u8, .c_uchar: bits = 8
|
|
.u16, .c_ushort: bits = 16
|
|
.u32, .c_uint: bits = 32
|
|
.u64, .uint, .usize, .c_ulong, .c_ulonglong: {}
|
|
else: return false
|
|
}
|
|
limit := maxval!(u64)
|
|
if (signed) {
|
|
limit = u64(1) << (bits - 1)
|
|
if (!value.negative) limit -= 1
|
|
} else {
|
|
if (value.negative) return false
|
|
if (bits != 64) limit = (u64(1) << bits) - 1
|
|
}
|
|
return value.magnitude <= limit
|
|
}
|
|
kind :: ast.expr_kind(&state.tree, type)
|
|
if (value.kind == .aggregate) return value.annotation != no_node and try same_type(state, type, value.annotation)
|
|
if (kind == .optional_type) return value.kind == .null or try valid_value(state, ast.type_operand(&state.tree, type), value)
|
|
if (kind == .slice_type and value.kind == .string) {
|
|
view :: ast.slice_type(&state.tree, type)
|
|
child :: try canonical_type(state, view.element)
|
|
return (
|
|
!view.mutable and child != no_node and binding(state, child).kind == .builtin
|
|
and binding(state, child).data.builtin == .u8
|
|
)
|
|
}
|
|
if (kind == .function_type and value.kind == .function) {
|
|
actual :: try expression_type(state, value.node, 0)
|
|
return actual != no_node and try same_type(state, type, actual)
|
|
}
|
|
if (kind == .distinct_type) return try valid_value(state, ast.type_operand(&state.tree, type), value)
|
|
return false
|
|
}
|
|
|
|
@hide:file
|
|
enum_index proc($T type, value T) usize {
|
|
match typeinfo!(T) {
|
|
.enum |info|: {
|
|
inline for (info.fields) |field| {
|
|
if (value == field!(T, field.name)) return field.index
|
|
}
|
|
unreachable
|
|
}
|
|
else: unreachable
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
remember proc(state @mut State, target ast.NodeId) void ! mem.AllocError {
|
|
if (usize(target) >= state.original_count) return
|
|
saved :: try ast.copy_node(state.builder, target)
|
|
try arraylist.append(&state.rewrites.changes, Rewrite{ target = target, saved = saved })
|
|
}
|
|
|
|
@hide:file
|
|
replace proc(state @mut State, target, source ast.NodeId) void ! mem.AllocError {
|
|
try remember(state, target)
|
|
ast.replace_node(state.builder, target, source)
|
|
}
|
|
|
|
@hide:file
|
|
builtin_identity proc(kind sema.BuiltinType) sema.BuiltinType {
|
|
return match kind {
|
|
.i64, .c_long, .c_longlong: .int
|
|
.f64: .float
|
|
.uint, .c_ulong, .c_ulonglong: .u64
|
|
.c_char: .i8
|
|
.c_uchar: .u8
|
|
.c_short: .i16
|
|
.c_ushort: .u16
|
|
.c_int: .i32
|
|
.c_uint: .u32
|
|
else: kind
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
integer_type proc(state @mut State, annotation ast.NodeId) bool ! Error {
|
|
type :: try canonical_type(state, annotation)
|
|
if (type == no_node) return false
|
|
resolved :: binding(state, type)
|
|
if (resolved.kind == .builtin) {
|
|
return match builtin_identity(resolved.data.builtin) {
|
|
.int, .i8, .i16, .i32, .isize, .u8, .u16, .u32, .u64, .usize: true
|
|
else: false
|
|
}
|
|
}
|
|
if (ast.expr_kind(&state.tree, type) == .distinct_type) return try integer_type(state, ast.type_operand(&state.tree, type))
|
|
return false
|
|
}
|
|
|
|
@hide:file
|
|
integer_value proc(state @mut State, id ast.NodeId, magnitude u64, negative bool, annotation ast.NodeId) Value ! Error {
|
|
result :: Value{ kind = .integer, node = id, magnitude = magnitude, negative = negative, annotation = annotation }
|
|
if (annotation != no_node and !try valid_value(state, annotation, result)) return Value{}
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
same_string proc(state @State, left, right ast.NodeId) bool ! Error {
|
|
a :: ast.literal_text(&state.tree, left)
|
|
b :: ast.literal_text(&state.tree, right)
|
|
ac := usize(1)
|
|
bc := usize(1)
|
|
while (ac < a.len - 1 and bc < b.len - 1) {
|
|
av :: ast.string_next(a, &ac) catch { return false }
|
|
bv :: ast.string_next(b, &bc) catch { return false }
|
|
if (av != bv) return false
|
|
}
|
|
return ac == a.len - 1 and bc == b.len - 1
|
|
}
|
|
|
|
@hide:file
|
|
flexible proc(state @State, id ast.NodeId) bool {
|
|
kind :: ast.expr_kind(&state.tree, id)
|
|
if (kind == .literal_int or kind == .literal_float) return true
|
|
if (kind == .unary) {
|
|
view :: ast.unary_expr(&state.tree, id)
|
|
return view.operator == .negate and flexible(state, view.operand)
|
|
}
|
|
if (kind == .binary) {
|
|
view :: ast.binary_expr(&state.tree, id)
|
|
return (
|
|
(view.operator == .add or view.operator == .subtract or view.operator == .multiply or view.operator == .divide)
|
|
and flexible(state, view.left) and flexible(state, view.right)
|
|
)
|
|
}
|
|
return false
|
|
}
|
|
|
|
@hide:file
|
|
template proc(state @State, id ast.NodeId) bool {
|
|
return ast.function_generic(&state.tree, id) or compiletime_result(state, ast.function_decl(&state.tree, id).return_type)
|
|
}
|