1553 lines
69 KiB
Plaintext
1553 lines
69 KiB
Plaintext
import "@std/debug"
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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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sema :: import "@source/sema"
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TypeKind :: enum {
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none,
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invalid,
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int,
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float,
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bool,
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string,
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void,
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function,
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range,
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array,
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usize,
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}
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ArrayId :: distinct u32
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no_array :: maxval!(ArrayId)
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ArrayType :: struct {
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element Type
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len usize
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mutable bool
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}
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Type :: struct {
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kind TypeKind = .none
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function ast.NodeId = ast.NodeId(maxval!(u32))
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diagnostic diagnostics.DiagnosticId = diagnostics.no_diagnostic
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array_type ArrayId = no_array
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range_element TypeKind = .none
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}
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@hide:file
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Storage :: struct {
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types []mut Type
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arrays arraylist.ArrayList(ArrayType)
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fallthroughs hashmap.AutoHashMap(ast.NodeId, diagnostics.DiagnosticId)
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allocator mem.Allocator
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}
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#! owns node-indexed types, interned array descriptors, and function fallthrough obligations; release with deinit.
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#! function IDs refer to the caller-owned AST; diagnostic IDs refer to the caller-owned store.
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Result :: struct { storage Storage }
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@hide:file
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no_index :: maxval!(usize)
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@hide:file
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Role :: enum {
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none,
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expression,
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declaration,
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parameter,
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function,
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annotation,
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invalid,
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body,
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return_stmt,
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if_stmt,
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assignment_stmt,
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while_stmt,
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for_stmt,
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loop_capture,
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loop_control,
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}
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@hide:file
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GroupLink :: struct {
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parent usize = 0
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size usize = 1
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}
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@hide:file
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Cell :: struct {
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role Role = .none
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type Type = Type{}
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numeric bool = false
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anchored bool = false
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demand TypeKind = .none
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fixed bool = false
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local bool = false
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assignment_value bool = false
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for_iterable bool = false
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expected Type = Type{}
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visiting bool = false
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constant_visiting bool = false
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count_declaration bool = false
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literal ast.NodeId = ast.NodeId(maxval!(u32))
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producer ast.NodeId = ast.NodeId(maxval!(u32))
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capture ast.NodeId = ast.NodeId(maxval!(u32))
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first_edge usize = no_index
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return_annotation ast.NodeId = ast.NodeId(maxval!(u32))
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}
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@hide:file
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Edge :: struct {
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dependent ast.NodeId
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next usize
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}
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@hide:file
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State :: struct {
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tree @ast.Tree
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resolution @sema.Resolution
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diagnostics @mut diagnostics.Store
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types []mut Type
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cells []mut Cell
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groups []mut GroupLink
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edges arraylist.ArrayList(Edge)
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arrays arraylist.ArrayList(ArrayType)
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collecting_assignment bool = false
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has_assignments bool = false
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}
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#! borrows the AST, resolution, and diagnostic store only during checking.
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#! temporary constraints are freed on every exit; Result owns types, array descriptors, and fallthrough obligations.
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check proc(
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allocator mem.Allocator,
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tree @ast.Tree,
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resolution @sema.Resolution,
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diagnostic_store @mut diagnostics.Store,
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) Result ! (mem.AllocError | diagnostics.CapacityError) {
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count :: ast.node_count(tree)
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types :: try mem.alloc(Type, allocator, count)
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errdefer mem.free(allocator, types)
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mem.set(types, Type{})
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cells :: try mem.alloc(Cell, allocator, count)
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defer mem.free(allocator, cells)
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mem.set(cells, Cell{})
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groups :: try mem.alloc(GroupLink, allocator, count)
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defer mem.free(allocator, groups)
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mem.set(groups, GroupLink{})
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for (0..count) |i| groups[i].parent = i
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queue :: try mem.alloc(ast.NodeId, allocator, count)
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defer mem.free(allocator, queue)
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state := State{
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tree = tree,
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resolution = resolution,
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diagnostics = diagnostic_store,
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types = types,
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cells = cells,
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groups = groups,
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edges = arraylist.init(allocator),
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arrays = arraylist.init(allocator),
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}
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defer arraylist.deinit(&state.edges)
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errdefer arraylist.deinit(&state.arrays)
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for 0..ast.package_decl_count(tree) |i| {
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id :: ast.package_decl(tree, i)
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if (ast.decl_kind(tree, id) == .statement) cells[usize(id)].count_declaration = true
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}
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for (0..ast.package_decl_count(tree)) |i| {
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id :: ast.package_decl(tree, i)
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match ast.decl_kind(tree, id) {
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.statement: try collect_declaration(&state, id)
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.function: try collect_function(&state, id)
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.invalid: collect_invalid(&state, id)
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}
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}
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# Preserve binding errors before RHS errors propagate. Indexed writability
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# waits for shapes; neither check poisons the target's type.
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for 0..count |i| {
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if (cells[i].role != .assignment_stmt) continue
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target :: ast.assignment_stmt(tree, ast.NodeId(i)).target
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if (ast.expr_kind(tree, target) != .identifier) continue
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binding :: sema.binding(resolution, target)
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if (binding.kind == .invalid) {
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cells[i].type = invalid_type(binding.data.diagnostic)
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} else if (binding.kind == .declaration and !mutable_target(&state, target)) {
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cells[i].type = invalid_type(try diagnostics.add(
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diagnostic_store, .invalid_assignment_target, ast.node_span(tree, target),
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))
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}
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}
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# aliases share a type variable; explicit annotations and parameters are boundaries.
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or ast.expr_kind(tree, id) != .identifier) continue
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binding :: sema.binding(resolution, id)
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if (binding.kind != .declaration) continue
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target :: binding.data.declaration
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try depend(&state, target, id)
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if (cells[usize(target)].fixed) cells[i].type = cells[usize(target)].type
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}
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role == .declaration and !cells[i].fixed) {
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join(&state, id, ast.statement_decl(tree, id).initializer)
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}
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if (cells[i].role != .expression or ast.expr_kind(tree, id) != .identifier) continue
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binding :: sema.binding(resolution, id)
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if (binding.kind == .declaration and !cells[i].assignment_value and !cells[usize(binding.data.declaration)].fixed) {
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join(&state, id, binding.data.declaration)
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}
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}
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# assignment inputs observe established declaration types, never contribute
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# constraints back into those declarations.
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for 0..2 |phase| {
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if (phase == 1 and !state.has_assignments) break
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assignment_values :: phase == 1
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if (assignment_values) {
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (!cells[i].assignment_value or cells[i].role != .expression or ast.expr_kind(tree, id) != .identifier) continue
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binding :: sema.binding(resolution, id)
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if (binding.kind == .declaration) cells[i].type = types[usize(binding.data.declaration)]
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}
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}
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# Calls use the signature result before contextual literal inference.
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .call) continue
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callee :: ast.call_expr(tree, id).callee
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signature :: try infer_shape(&state, callee, false)
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if (signature.function != ast.NodeId(maxval!(u32))) {
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result :: ast.function_decl(tree, signature.function).return_type
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seed(&state, id, types[usize(result)])
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} else if (signature.kind == .invalid) {
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seed(&state, id, signature)
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}
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}
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .call) continue
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callee :: ast.call_expr(tree, id).callee
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signature :: group_type(&state, callee)
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if (signature.function != ast.NodeId(maxval!(u32))) continue
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if (signature.kind == .invalid) {
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seed(&state, id, signature)
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} else if (signature.kind != .none or cells[root(&state, usize(callee))].numeric) {
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seed(&state, id, invalid_type(try diagnostics.add(diagnostic_store, .not_callable, ast.node_span(tree, callee))))
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} else {
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# without a function anchor, share the eventual inference error.
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join(&state, id, callee)
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}
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}
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for (0..count) |i| {
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if (cells[i].role == .none or cells[i].role == .body or cells[i].assignment_value != assignment_values or types[i].kind == .invalid) continue
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types[i] = cells[root(&state, i)].type
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}
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# reject nonnumeric operations before connecting otherwise valid inputs.
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try apply_contexts(&state, assignment_values, true)
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try prepare_shapes(&state, assignment_values, false)
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try prepare_ranges(&state, assignment_values, false)
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values) continue
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match ast.expr_kind(tree, id) {
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.unary: {
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expression :: ast.unary_expr(tree, id)
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if (expression.operator == .negate) try require_numeric(&state, id, expression.operand)
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}
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.binary: {
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expression :: ast.binary_expr(tree, id)
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if (logical(expression.operator) or bool_equality(&state, id)) continue
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try require_numeric(&state, id, expression.left)
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try require_numeric(&state, id, expression.right)
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}
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else: {}
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}
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}
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propagate(&state, queue)
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# numeric edges join flexible operands; rigid inputs supply only demands.
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values) continue
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match ast.expr_kind(tree, id) {
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.unary: {
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expression :: ast.unary_expr(tree, id)
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if (expression.operator == .negate) try numeric_operand(&state, id, expression.operand)
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}
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.binary: {
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expression :: ast.binary_expr(tree, id)
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if (logical(expression.operator)) continue
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if (comparison(expression.operator)) {
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if (!bool_equality(&state, id)) try comparison_operands(&state, id)
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} else {
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try numeric_operand(&state, id, expression.left)
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try numeric_operand(&state, id, expression.right)
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if (expression.operator == .divide) {
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try impose(&state, id, .float, .integer_division, expression.span)
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}
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}
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}
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else: {}
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}
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}
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try apply_contexts(&state, assignment_values, false)
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try prepare_shapes(&state, assignment_values, false)
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try prepare_ranges(&state, assignment_values, true)
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for 0..count |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .index) continue
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try demand(&state, ast.index_expr(tree, id).index, Type{ kind = .usize }, .invalid_index_type)
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}
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# defaults follow ordinary program demands, then isolated assignment demands.
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for (0..count) |i| {
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if (root(&state, i) != i or cells[i].assignment_value != assignment_values) continue
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if (cells[i].type.kind == .invalid) continue
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if (cells[i].numeric and cells[i].anchored) {
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kind TypeKind :: if (cells[i].demand != .none) cells[i].demand else .int
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cells[i].type = Type{ kind = kind }
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}
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}
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try prepare_shapes(&state, assignment_values, true)
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if (!assignment_values) try specialize_annotations(&state)
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .expression or cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .call) continue
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callee :: ast.call_expr(tree, id).callee
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signature :: group_type(&state, callee)
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if (signature.function != ast.NodeId(maxval!(u32)) or signature.kind == .none or signature.kind == .invalid) continue
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if (group_type(&state, id).kind != .invalid) {
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seed(&state, id, invalid_type(try diagnostics.add(diagnostic_store, .not_callable, ast.node_span(tree, callee))))
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}
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}
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for (0..count) |i| {
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if (assignment_values or cells[i].role != .declaration or types[i].kind == .invalid) continue
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index :: root(&state, i)
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if (cells[index].type.kind != .none) continue
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diagnostic :: try diagnostics.add(diagnostic_store, .cannot_infer_type, ast.statement_decl(tree, ast.NodeId(i)).name)
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cells[index].type = invalid_type(diagnostic)
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}
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for (0..count) |i| {
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if (cells[i].role == .none or cells[i].role == .body or cells[i].assignment_value != assignment_values or types[i].kind == .invalid) continue
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types[i] = cells[root(&state, i)].type
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}
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}
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for (0..count) |i| try validate(&state, ast.NodeId(i))
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# errors travel only from dependencies to users. A rejected use never poisons
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# an explicitly typed declaration, and body errors do not erase signatures.
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propagate(&state, queue)
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# validate conditions after operand errors have reached their users.
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for (0..count) |i| {
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id :: ast.NodeId(i)
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if (cells[i].role != .if_stmt and cells[i].role != .while_stmt) continue
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condition :: if (cells[i].role == .if_stmt) ast.if_stmt(tree, id).condition else ast.while_stmt(tree, id).condition
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actual :: types[usize(condition)]
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if (actual.kind != .invalid and actual.kind != .bool) {
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try fail(&state, condition, .condition_not_bool, ast.node_span(tree, condition))
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}
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}
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for (0..count) |i| {
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if (cells[i].role != .for_stmt) continue
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iterable :: ast.for_stmt(tree, ast.NodeId(i)).iterable
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actual :: types[usize(iterable)]
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if (actual.kind != .invalid and actual.kind != .range) {
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try fail(&state, iterable, .invalid_for_iterable, ast.node_span(tree, iterable))
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}
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}
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propagate(&state, queue)
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fallthroughs hashmap.AutoHashMap(ast.NodeId, diagnostics.DiagnosticId) := hashmap.init(allocator)
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errdefer hashmap.deinit(&fallthroughs)
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for (0..ast.package_decl_count(tree)) |i| {
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id :: ast.package_decl(tree, i)
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if (ast.decl_kind(tree, id) != .function) continue
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function :: ast.function_decl(tree, id)
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result :: types[usize(function.return_type)]
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if (result.kind == .void or result.kind == .invalid or types[usize(id)].kind == .invalid) continue
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if (block_falls_through(&state, function.body)) {
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# fallthrough is independent of errors in paths that may not execute.
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diagnostic :: try diagnostics.add(diagnostic_store, .missing_return, ast.node_span(tree, function.body))
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hashmap.put(&fallthroughs, id, diagnostic) catch |err| {
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match err {
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.key_exists: unreachable
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else: return err
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}
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}
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}
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}
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return Result{ storage = Storage{
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types = types,
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arrays = state.arrays,
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fallthroughs = fallthroughs,
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allocator = allocator,
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} }
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}
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#! returns a type without retaining a reference to checker temporaries.
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type_of proc(result @Result, id ast.NodeId) Type {
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debug.assert(usize(id) < result.storage.types.len)
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return result.storage.types[usize(id)]
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}
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#! returns the original diagnostic for a function's nonvoid fallthrough, independent of body errors.
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#! null means the function has no fallthrough obligation; lowering still owns trap placement.
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fallthrough_diagnostic proc(result @Result, function ast.NodeId) ?diagnostics.DiagnosticId {
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return hashmap.get(&result.storage.fallthroughs, function)
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}
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array_type_count proc(result @Result) usize {
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return result.storage.arrays.items.len
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}
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array_type proc(result @Result, id ArrayId) ArrayType {
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debug.assert(usize(id) < result.storage.arrays.items.len)
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return result.storage.arrays.items[usize(id)]
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}
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#! releases type, descriptor, and fallthrough storage using the allocator retained by check.
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deinit proc(result @mut Result) void {
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mem.free(result.storage.allocator, result.storage.types)
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arraylist.deinit(&result.storage.arrays)
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hashmap.deinit(&result.storage.fallthroughs)
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}
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@hide:file
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propagate proc(state @mut State, queue []mut ast.NodeId) void {
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next := usize(0)
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end := usize(0)
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for (0..(state.types.len)) |i| {
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if (state.types[i].kind != .invalid) continue
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queue[end] = ast.NodeId(i)
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end += 1
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}
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while (next < end) {
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source :: queue[next]
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next += 1
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edge := state.cells[usize(source)].first_edge
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while (edge != no_index) {
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dependent :: state.edges.items[edge].dependent
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if (state.types[usize(dependent)].kind != .invalid) {
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state.types[usize(dependent)] = invalid_type(state.types[usize(source)].diagnostic)
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queue[end] = dependent
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end += 1
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}
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edge = state.edges.items[edge].next
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}
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}
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}
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@hide:file
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|
require_numeric proc(state @mut State, expression, operand ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
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index :: root(state, usize(operand))
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type :: state.cells[index].type
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if (type.kind == .invalid) {
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state.types[usize(expression)] = type
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return
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}
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if (type.kind == .none or state.cells[index].numeric or numeric_kind(type.kind)) return
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try fail(state, expression, .invalid_operand, ast.node_span(state.tree, expression))
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}
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@hide:file
|
|
invalid_type proc(diagnostic diagnostics.DiagnosticId) Type {
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return Type{ kind = .invalid, diagnostic = diagnostic }
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}
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|
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@hide:file
|
|
root proc(state @mut State, index usize) usize {
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current := index
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while (state.groups[current].parent != current) current = state.groups[current].parent
|
|
next := index
|
|
while (state.groups[next].parent != next) {
|
|
parent :: state.groups[next].parent
|
|
state.groups[next].parent = current
|
|
next = parent
|
|
}
|
|
return current
|
|
}
|
|
|
|
@hide:file
|
|
group_type proc(state @mut State, id ast.NodeId) Type {
|
|
return state.cells[root(state, usize(id))].type
|
|
}
|
|
|
|
@hide:file
|
|
seed proc(state @mut State, id ast.NodeId, type Type) void {
|
|
index :: root(state, usize(id))
|
|
if (state.cells[index].type.kind != .invalid) state.cells[index].type = type
|
|
}
|
|
|
|
@hide:file
|
|
join proc(state @mut State, left, right ast.NodeId) void {
|
|
a := root(state, usize(left))
|
|
b := root(state, usize(right))
|
|
if (a == b) return
|
|
if (state.groups[a].size < state.groups[b].size) {
|
|
saved :: a
|
|
a = b
|
|
b = saved
|
|
}
|
|
state.groups[b].parent = a
|
|
state.groups[a].size += state.groups[b].size
|
|
if (state.cells[a].type.kind == .none or state.cells[b].type.kind == .invalid) {
|
|
state.cells[a].type = state.cells[b].type
|
|
}
|
|
state.cells[a].numeric = state.cells[a].numeric or state.cells[b].numeric
|
|
state.cells[a].anchored = state.cells[a].anchored or state.cells[b].anchored
|
|
if (state.cells[a].demand == .none) state.cells[a].demand = state.cells[b].demand
|
|
if (state.cells[a].literal == ast.NodeId(maxval!(u32))) state.cells[a].literal = state.cells[b].literal
|
|
if (state.cells[a].producer == ast.NodeId(maxval!(u32))) state.cells[a].producer = state.cells[b].producer
|
|
}
|
|
|
|
@hide:file
|
|
depend proc(state @mut State, source, dependent ast.NodeId) void ! mem.AllocError {
|
|
next :: state.cells[usize(source)].first_edge
|
|
try arraylist.append(&state.edges, Edge{ dependent = dependent, next = next })
|
|
state.cells[usize(source)].first_edge = state.edges.items.len - 1
|
|
}
|
|
|
|
@hide:file
|
|
collect_invalid proc(state @mut State, id ast.NodeId) void {
|
|
state.cells[usize(id)].role = .invalid
|
|
state.cells[usize(id)].type = invalid_type(ast.invalid(state.tree, id).diagnostic)
|
|
}
|
|
|
|
@hide:file
|
|
check_annotation proc(state @mut State, id ast.NodeId, allow_void bool) Type ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.cells[usize(id)].role == .annotation) return state.types[usize(id)]
|
|
state.cells[usize(id)].role = .annotation
|
|
if (ast.expr_kind(state.tree, id) == .array_type) {
|
|
view :: ast.array_type(state.tree, id)
|
|
element := try check_annotation(state, view.element, true)
|
|
element_binding :: sema.binding(state.resolution, view.element)
|
|
if ((element_binding.kind == .builtin
|
|
and (element_binding.data.builtin == .int or element_binding.data.builtin == .float))
|
|
or element.kind == .void or element.kind == .range) {
|
|
element = invalid_type(try diagnostics.add(state.diagnostics, .invalid_array_element_type, ast.node_span(state.tree, view.element)))
|
|
state.types[usize(view.element)] = element
|
|
state.cells[usize(view.element)].type = element
|
|
}
|
|
len := no_index
|
|
type := element
|
|
if (view.count) |count| {
|
|
try collect_expression(state, count)
|
|
if (constant_integer(state, count)) |value| {
|
|
if (!value.negative and value.magnitude <= u64(maxval!(usize))) {
|
|
len = usize(value.magnitude)
|
|
if (len == no_index) type = invalid_type(try diagnostics.add(state.diagnostics, .array_size_overflow, ast.node_span(state.tree, count)))
|
|
} else {
|
|
type = invalid_type(try diagnostics.add(state.diagnostics, .invalid_array_length, ast.node_span(state.tree, count)))
|
|
}
|
|
} else {
|
|
actual :: group_type(state, count)
|
|
type = if (actual.kind == .invalid) actual else invalid_type(try diagnostics.add(state.diagnostics, .invalid_array_length, ast.node_span(state.tree, count)))
|
|
}
|
|
}
|
|
if (type.kind != .invalid) type = try intern_array(state, ArrayType{ element = element, len = len, mutable = view.mutable })
|
|
state.types[usize(id)] = type
|
|
state.cells[usize(id)].type = type
|
|
return type
|
|
}
|
|
binding :: sema.binding(state.resolution, id)
|
|
type := Type{}
|
|
match binding.kind {
|
|
.invalid: type = invalid_type(binding.data.diagnostic)
|
|
.builtin: {
|
|
type.kind = match binding.data.builtin {
|
|
.int, .i64: .int
|
|
.float, .f64: .float
|
|
.usize: .usize
|
|
.bool: .bool
|
|
.string: .string
|
|
.void: .void
|
|
}
|
|
if (type.kind == .void and !allow_void) {
|
|
type = invalid_type(try diagnostics.add(state.diagnostics, .invalid_void_type, ast.node_span(state.tree, id)))
|
|
}
|
|
}
|
|
else: type = invalid_type(try diagnostics.add(state.diagnostics, .expected_type, ast.node_span(state.tree, id)))
|
|
}
|
|
state.types[usize(id)] = type
|
|
state.cells[usize(id)].type = type
|
|
return type
|
|
}
|
|
|
|
@hide:file
|
|
collect_declaration proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
declaration :: ast.statement_decl(state.tree, id)
|
|
state.cells[usize(id)].role = .declaration
|
|
if (declaration.type) |type| {
|
|
state.cells[usize(id)].fixed = true
|
|
state.cells[usize(id)].type = try check_annotation(state, type, false)
|
|
try depend(state, type, id)
|
|
}
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .invalid) {
|
|
state.cells[usize(id)].fixed = true
|
|
state.cells[usize(id)].type = invalid_type(binding.data.diagnostic)
|
|
}
|
|
try collect_expression(state, declaration.initializer)
|
|
try depend(state, declaration.initializer, id)
|
|
}
|
|
|
|
@hide:file
|
|
collect_function proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
function :: ast.function_decl(tree, id)
|
|
state.cells[usize(id)].role = .function
|
|
state.cells[usize(id)].fixed = true
|
|
state.cells[usize(id)].type = Type{ kind = .function, function = id }
|
|
_ = try check_annotation(state, function.return_type, true)
|
|
try depend(state, function.return_type, id)
|
|
for (0..ast.function_param_count(tree, id)) |i| {
|
|
parameter :: ast.function_param(tree, id, i)
|
|
state.cells[usize(parameter)].role = .parameter
|
|
state.cells[usize(parameter)].fixed = true
|
|
state.cells[usize(parameter)].type = try check_annotation(state, ast.param(tree, parameter).type, false)
|
|
binding :: sema.binding(state.resolution, parameter)
|
|
if (binding.kind == .invalid) state.cells[usize(parameter)].type = invalid_type(binding.data.diagnostic)
|
|
try depend(state, ast.param(tree, parameter).type, parameter)
|
|
try depend(state, parameter, id)
|
|
}
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .invalid) {
|
|
state.cells[usize(id)].type = invalid_type(binding.data.diagnostic)
|
|
state.cells[usize(id)].type.function = id
|
|
}
|
|
try collect_block(state, function.body, function.return_type, false)
|
|
}
|
|
|
|
@hide:file
|
|
collect_capture proc(state @mut State, id, body ast.NodeId) void ! mem.AllocError {
|
|
state.cells[usize(id)].role = .loop_capture
|
|
state.cells[usize(id)].fixed = true
|
|
state.cells[usize(id)].local = true
|
|
state.cells[usize(id)].type = Type{ kind = .int }
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .invalid) {
|
|
state.cells[usize(id)].type = invalid_type(binding.data.diagnostic)
|
|
}
|
|
try depend(state, id, body)
|
|
}
|
|
|
|
@hide:file
|
|
collect_block proc(state @mut State, id, return_annotation ast.NodeId, in_loop bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
state.cells[usize(id)].role = .body
|
|
for (0..ast.block_statement_count(tree, id)) |i| {
|
|
statement :: ast.block_statement(tree, id, i)
|
|
match ast.stmt_kind(tree, statement) {
|
|
.declaration: {
|
|
state.cells[usize(statement)].local = true
|
|
try collect_declaration(state, statement)
|
|
}
|
|
.expression: try collect_expression(state, ast.statement_expr(tree, statement))
|
|
.return_stmt: {
|
|
state.cells[usize(statement)].role = .return_stmt
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
state.cells[usize(statement)].return_annotation = return_annotation
|
|
if (ast.return_stmt(tree, statement).value) |value| {
|
|
try collect_expression(state, value)
|
|
try depend(state, value, statement)
|
|
}
|
|
}
|
|
.if_stmt: {
|
|
conditional :: ast.if_stmt(tree, statement)
|
|
state.cells[usize(statement)].role = .if_stmt
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
try collect_expression(state, conditional.condition)
|
|
try depend(state, conditional.condition, statement)
|
|
try collect_block(state, conditional.then_block, return_annotation, in_loop)
|
|
try depend(state, conditional.then_block, id)
|
|
if (conditional.else_block) |other| {
|
|
try collect_block(state, other, return_annotation, in_loop)
|
|
try depend(state, other, id)
|
|
}
|
|
}
|
|
.assignment_stmt: {
|
|
assignment :: ast.assignment_stmt(tree, statement)
|
|
state.cells[usize(statement)].role = .assignment_stmt
|
|
state.has_assignments = true
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
binding :: sema.binding(state.resolution, assignment.target)
|
|
if (binding.kind == .builtin) {
|
|
state.cells[usize(assignment.target)].role = .expression
|
|
state.cells[usize(assignment.target)].type = invalid_type(try diagnostics.add(
|
|
state.diagnostics, .invalid_assignment_target, ast.node_span(tree, assignment.target),
|
|
))
|
|
} else {
|
|
try collect_expression(state, assignment.target)
|
|
}
|
|
state.collecting_assignment = true
|
|
try collect_expression(state, assignment.value)
|
|
state.collecting_assignment = false
|
|
try depend(state, assignment.target, statement)
|
|
try depend(state, assignment.value, statement)
|
|
}
|
|
.while_stmt: {
|
|
loop :: ast.while_stmt(tree, statement)
|
|
state.cells[usize(statement)].role = .while_stmt
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
try collect_expression(state, loop.condition)
|
|
try depend(state, loop.condition, statement)
|
|
try collect_block(state, loop.body, return_annotation, true)
|
|
try depend(state, loop.body, id)
|
|
}
|
|
.for_stmt: {
|
|
loop :: ast.for_stmt(tree, statement)
|
|
state.cells[usize(statement)].role = .for_stmt
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
state.cells[usize(loop.iterable)].for_iterable = true
|
|
try collect_expression(state, loop.iterable)
|
|
try depend(state, loop.iterable, statement)
|
|
if (loop.pointer_capture) {
|
|
state.cells[usize(statement)].type = invalid_type(try diagnostics.add(
|
|
state.diagnostics, .range_pointer_capture, loop.span,
|
|
))
|
|
}
|
|
if (loop.index_capture) {
|
|
diagnostic :: try diagnostics.add(state.diagnostics, .range_index_capture, loop.span)
|
|
if (state.cells[usize(statement)].type.kind != .invalid) {
|
|
state.cells[usize(statement)].type = invalid_type(diagnostic)
|
|
}
|
|
}
|
|
if (loop.capture) |capture| {
|
|
try collect_capture(state, capture, loop.body)
|
|
state.cells[usize(loop.iterable)].capture = capture
|
|
}
|
|
if (loop.index) |index| try collect_capture(state, index, loop.body)
|
|
try collect_block(state, loop.body, return_annotation, true)
|
|
try depend(state, loop.body, id)
|
|
}
|
|
.break_stmt, .continue_stmt: {
|
|
state.cells[usize(statement)].role = .loop_control
|
|
state.cells[usize(statement)].type = Type{ kind = .void }
|
|
if (!in_loop) {
|
|
code :: if (ast.stmt_kind(tree, statement) == .break_stmt)
|
|
diagnostics.Code.break_outside_loop
|
|
else
|
|
diagnostics.Code.continue_outside_loop
|
|
state.cells[usize(statement)].type = invalid_type(try diagnostics.add(
|
|
state.diagnostics, code, ast.node_span(tree, statement),
|
|
))
|
|
}
|
|
}
|
|
.invalid: collect_invalid(state, statement)
|
|
}
|
|
source :: if (ast.stmt_kind(tree, statement) == .expression) ast.statement_expr(tree, statement) else statement
|
|
try depend(state, source, id)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
collect_expression proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.cells[usize(id)].role != .none) return
|
|
tree :: state.tree
|
|
state.cells[usize(id)].role = .expression
|
|
state.cells[usize(id)].assignment_value = state.collecting_assignment
|
|
match ast.expr_kind(tree, id) {
|
|
.literal_int: {
|
|
state.cells[usize(id)].numeric = true
|
|
state.cells[usize(id)].anchored = true
|
|
}
|
|
.literal_float: state.cells[usize(id)].type = Type{ kind = .float }
|
|
.literal_bool: state.cells[usize(id)].type = Type{ kind = .bool }
|
|
.literal_string: state.cells[usize(id)].type = Type{ kind = .string }
|
|
.identifier: {
|
|
binding :: sema.binding(state.resolution, id)
|
|
match binding.kind {
|
|
.invalid: state.cells[usize(id)].type = invalid_type(binding.data.diagnostic)
|
|
.builtin: state.cells[usize(id)].type = invalid_type(try diagnostics.add(state.diagnostics, .type_not_value, ast.node_span(tree, id)))
|
|
else: {}
|
|
}
|
|
}
|
|
.unary: {
|
|
expression :: ast.unary_expr(tree, id)
|
|
if (expression.operator == .negate) state.cells[usize(id)].producer = id
|
|
if (expression.operator == .logical_not) {
|
|
state.cells[usize(id)].type = Type{ kind = .bool }
|
|
} else {
|
|
state.cells[usize(id)].numeric = true
|
|
}
|
|
operand :: expression.operand
|
|
try collect_expression(state, operand)
|
|
try depend(state, operand, id)
|
|
}
|
|
.binary: {
|
|
expression :: ast.binary_expr(tree, id)
|
|
if (!comparison(expression.operator) and !logical(expression.operator)) state.cells[usize(id)].producer = id
|
|
if (comparison(expression.operator) or logical(expression.operator)) {
|
|
state.cells[usize(id)].type = Type{ kind = .bool }
|
|
} else {
|
|
state.cells[usize(id)].numeric = true
|
|
}
|
|
try collect_expression(state, expression.left)
|
|
try collect_expression(state, expression.right)
|
|
try depend(state, expression.left, id)
|
|
# the RHS may be skipped, so its errors do not erase the bool result.
|
|
if (!logical(expression.operator)) try depend(state, expression.right, id)
|
|
}
|
|
.range: {
|
|
expression :: ast.range_expr(tree, id)
|
|
state.cells[usize(id)].type = Type{ kind = .range }
|
|
if (!state.cells[usize(id)].for_iterable) {
|
|
state.cells[usize(id)].type = invalid_type(try diagnostics.add(
|
|
state.diagnostics, .range_value_not_supported, expression.span,
|
|
))
|
|
}
|
|
try collect_expression(state, expression.start)
|
|
try collect_expression(state, expression.end)
|
|
try depend(state, expression.start, id)
|
|
try depend(state, expression.end, id)
|
|
}
|
|
.call: {
|
|
callee :: ast.call_expr(tree, id).callee
|
|
try collect_expression(state, callee)
|
|
try depend(state, callee, id)
|
|
for (0..ast.call_arg_count(tree, id)) |i| {
|
|
argument :: ast.call_arg(tree, id, i)
|
|
try collect_expression(state, argument)
|
|
try depend(state, argument, id)
|
|
}
|
|
}
|
|
.array_type: {
|
|
state.cells[usize(id)].type = invalid_type(try diagnostics.add(state.diagnostics, .type_not_value, ast.node_span(tree, id)))
|
|
}
|
|
.array_literal: {
|
|
state.cells[usize(id)].literal = id
|
|
for 0..ast.array_element_count(tree, id) |i| {
|
|
element :: ast.array_element(tree, id, i)
|
|
try collect_expression(state, element)
|
|
try depend(state, element, id)
|
|
}
|
|
}
|
|
.index: {
|
|
expression :: ast.index_expr(tree, id)
|
|
try collect_expression(state, expression.base)
|
|
try collect_expression(state, expression.index)
|
|
try depend(state, expression.base, id)
|
|
try depend(state, expression.index, id)
|
|
}
|
|
.invalid: collect_invalid(state, id)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
numeric_kind proc(kind TypeKind) bool {
|
|
return kind == .int or kind == .float or kind == .usize
|
|
}
|
|
|
|
@hide:file
|
|
comparison proc(operator ast.BinaryOperator) bool {
|
|
return (
|
|
operator == .equal or operator == .not_equal or operator == .less
|
|
or operator == .less_equal or operator == .greater or operator == .greater_equal
|
|
)
|
|
}
|
|
|
|
@hide:file
|
|
logical proc(operator ast.BinaryOperator) bool {
|
|
return operator == .logical_and or operator == .logical_or
|
|
}
|
|
|
|
@hide:file
|
|
bool_equality proc(state @mut State, id ast.NodeId) bool {
|
|
expression :: ast.binary_expr(state.tree, id)
|
|
return (
|
|
(expression.operator == .equal or expression.operator == .not_equal)
|
|
and group_type(state, expression.left).kind == .bool
|
|
and group_type(state, expression.right).kind == .bool
|
|
)
|
|
}
|
|
|
|
@hide:file
|
|
comparison_operands proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.types[usize(id)].kind == .invalid) return
|
|
expression :: ast.binary_expr(state.tree, id)
|
|
left :: root(state, usize(expression.left))
|
|
right :: root(state, usize(expression.right))
|
|
# only operand groups receive numeric demands; the result stays bool.
|
|
if (state.cells[left].numeric or state.cells[left].type.kind == .none) {
|
|
state.cells[left].numeric = true
|
|
try numeric_constraint(state, expression.left, expression.right, id)
|
|
} else if (state.cells[right].numeric or state.cells[right].type.kind == .none) {
|
|
state.cells[right].numeric = true
|
|
try numeric_constraint(state, expression.right, expression.left, id)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
impose proc(state @mut State, id ast.NodeId, kind TypeKind, code diagnostics.Code, span ast.Span) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
index :: root(state, usize(id))
|
|
if (state.cells[index].type.kind == .invalid) return
|
|
state.cells[index].anchored = true
|
|
if (state.cells[index].demand == .none) {
|
|
state.cells[index].demand = kind
|
|
} else if (state.cells[index].demand != kind) {
|
|
state.cells[index].type = invalid_type(try diagnostics.add(state.diagnostics, code, span))
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
numeric_operand proc(state @mut State, expression, operand ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
try numeric_constraint(state, expression, operand, expression)
|
|
}
|
|
|
|
@hide:file
|
|
numeric_constraint proc(state @mut State, expression, operand, operation ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
index :: root(state, usize(operand))
|
|
type :: state.cells[index].type
|
|
if (state.types[usize(expression)].kind == .invalid or state.types[usize(operand)].kind == .invalid) return
|
|
if (group_type(state, expression).kind == .invalid) return
|
|
if (state.cells[index].numeric or type.kind == .none) {
|
|
expression_demand :: state.cells[root(state, usize(expression))].demand
|
|
operand_demand :: state.cells[index].demand
|
|
join(state, expression, operand)
|
|
if (expression_demand != .none) {
|
|
try impose(state, expression, expression_demand, .invalid_operand, ast.node_span(state.tree, operation))
|
|
}
|
|
if (operand_demand != .none) {
|
|
try impose(state, expression, operand_demand, .invalid_operand, ast.node_span(state.tree, operation))
|
|
}
|
|
} else if (numeric_kind(type.kind)) {
|
|
try impose(state, expression, type.kind, .invalid_operand, ast.node_span(state.tree, operation))
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
demand proc(state @mut State, id ast.NodeId, expected Type, code diagnostics.Code) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.types[usize(id)].kind == .invalid) return
|
|
index :: root(state, usize(id))
|
|
if (expected.kind == .array) {
|
|
literal :: state.cells[index].literal
|
|
if (literal == ast.NodeId(maxval!(u32))) return
|
|
previous :: state.cells[index].expected
|
|
if (previous.kind == .array and !same_type(state, previous, expected)) {
|
|
if (!has_inferred_count(state, previous) and !has_inferred_count(state, expected)) {
|
|
state.cells[index].type = invalid_type(try diagnostics.add(state.diagnostics, code, ast.node_span(state.tree, id)))
|
|
return
|
|
}
|
|
}
|
|
state.cells[index].expected = expected
|
|
descriptor :: state.arrays.items[usize(expected.array_type)]
|
|
len :: ast.array_element_count(state.tree, literal)
|
|
if (descriptor.len != no_index and descriptor.len != len) {
|
|
try fail(state, literal, .array_length_mismatch, ast.node_span(state.tree, literal))
|
|
}
|
|
for (0..len) |i| try demand(state, ast.array_element(state.tree, literal, i), descriptor.element, code)
|
|
return
|
|
}
|
|
if (!numeric_kind(expected.kind)) return
|
|
if (!state.cells[index].numeric and state.cells[index].type.kind != .none) return
|
|
state.cells[index].numeric = true
|
|
try impose(state, id, expected.kind, code, ast.node_span(state.tree, id))
|
|
}
|
|
|
|
@hide:file
|
|
range_bound_context proc(state @mut State, id ast.NodeId, family TypeKind) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.types[usize(id)].kind == .invalid) return
|
|
index :: root(state, usize(id))
|
|
if (state.cells[index].type.kind == .invalid) return
|
|
if (state.cells[index].demand != .none and state.cells[index].demand != family) {
|
|
try fail(state, id, .invalid_range_bound, ast.node_span(state.tree, id))
|
|
return
|
|
}
|
|
try demand(state, id, Type{ kind = family }, .invalid_range_bound)
|
|
}
|
|
|
|
@hide:file
|
|
fail proc(state @mut State, id ast.NodeId, code diagnostics.Code, span ast.Span) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.types[usize(id)].kind == .invalid) return
|
|
state.types[usize(id)] = invalid_type(try diagnostics.add(state.diagnostics, code, span))
|
|
}
|
|
|
|
@hide:file
|
|
require_bool proc(state @mut State, operand ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
type :: state.types[usize(operand)]
|
|
if (type.kind != .invalid and type.kind != .bool) {
|
|
try fail(state, operand, .invalid_operand, ast.node_span(state.tree, operand))
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
mutable_target proc(state @State, id ast.NodeId) bool {
|
|
if (ast.expr_kind(state.tree, id) == .index) {
|
|
view :: ast.index_expr(state.tree, id)
|
|
base :: state.types[usize(view.base)]
|
|
return base.kind == .array and state.arrays.items[usize(base.array_type)].mutable and mutable_target(state, view.base)
|
|
}
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind != .declaration) return false
|
|
target :: binding.data.declaration
|
|
if (state.cells[usize(target)].role != .declaration or !state.cells[usize(target)].local) return false
|
|
return ast.statement_decl(state.tree, target).mutability == .variable
|
|
}
|
|
|
|
@hide:file
|
|
same_signature proc(state @State, left, right ast.NodeId) bool {
|
|
tree :: state.tree
|
|
if (ast.function_param_count(tree, left) != ast.function_param_count(tree, right)) return false
|
|
left_result :: ast.function_decl(tree, left).return_type
|
|
right_result :: ast.function_decl(tree, right).return_type
|
|
if (!same_type(state, state.types[usize(left_result)], state.types[usize(right_result)])) return false
|
|
for (0..ast.function_param_count(tree, left)) |i| {
|
|
left_param :: ast.function_param(tree, left, i)
|
|
right_param :: ast.function_param(tree, right, i)
|
|
if (!same_type(state, state.types[usize(left_param)], state.types[usize(right_param)])) return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
@hide:file
|
|
compatible proc(state @mut State, value ast.NodeId, expected Type) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
actual :: state.types[usize(value)]
|
|
if (actual.kind == .invalid or expected.kind == .invalid) return
|
|
if (!same_type(state, actual, expected)) {
|
|
try fail(state, value, .type_mismatch, ast.node_span(state.tree, value))
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
validate proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
match state.cells[usize(id)].role {
|
|
.declaration: {
|
|
declaration :: ast.statement_decl(tree, id)
|
|
if (state.types[usize(declaration.initializer)].kind == .void) {
|
|
try fail(state, declaration.initializer, .type_mismatch, ast.node_span(tree, declaration.initializer))
|
|
}
|
|
if (declaration.type) |type| try compatible(state, declaration.initializer, state.types[usize(type)])
|
|
}
|
|
.assignment_stmt: {
|
|
assignment :: ast.assignment_stmt(tree, id)
|
|
target_type :: state.types[usize(assignment.target)]
|
|
if (target_type.kind == .invalid) return
|
|
if (mutable_target(state, assignment.target)) {
|
|
try compatible(state, assignment.value, target_type)
|
|
} else {
|
|
code :: if (ast.expr_kind(tree, assignment.target) == .index)
|
|
diagnostics.Code.invalid_index_assignment else diagnostics.Code.invalid_assignment_target
|
|
try fail(state, id, code, ast.node_span(tree, assignment.target))
|
|
}
|
|
}
|
|
.return_stmt: {
|
|
statement :: ast.return_stmt(tree, id)
|
|
expected :: state.types[usize(state.cells[usize(id)].return_annotation)]
|
|
if (expected.kind == .invalid) return
|
|
if (statement.value) |value| {
|
|
actual :: state.types[usize(value)]
|
|
if (actual.kind == .invalid) {
|
|
state.types[usize(id)] = actual
|
|
} else if (!same_type(state, actual, expected)) {
|
|
try fail(state, value, .return_type_mismatch, ast.node_span(tree, value))
|
|
state.types[usize(id)] = state.types[usize(value)]
|
|
}
|
|
} else if (expected.kind != .void) {
|
|
try fail(state, id, .return_type_mismatch, statement.span)
|
|
}
|
|
}
|
|
.expression: {
|
|
match ast.expr_kind(tree, id) {
|
|
.unary: {
|
|
expression :: ast.unary_expr(tree, id)
|
|
if (expression.operator == .logical_not) {
|
|
try require_bool(state, expression.operand)
|
|
return
|
|
}
|
|
operand :: state.types[usize(expression.operand)]
|
|
if (operand.kind != .invalid and (!numeric_kind(operand.kind) or operand.kind == .usize)) {
|
|
try fail(state, id, .invalid_operand, ast.node_span(tree, id))
|
|
}
|
|
}
|
|
.binary: {
|
|
expression :: ast.binary_expr(tree, id)
|
|
if (logical(expression.operator)) {
|
|
try require_bool(state, expression.left)
|
|
try require_bool(state, expression.right)
|
|
return
|
|
}
|
|
left :: state.types[usize(expression.left)]
|
|
right :: state.types[usize(expression.right)]
|
|
if (left.kind == .invalid or right.kind == .invalid) return
|
|
if ((expression.operator == .equal or expression.operator == .not_equal)
|
|
and left.kind == .bool and right.kind == .bool) return
|
|
if (!numeric_kind(left.kind) or !numeric_kind(right.kind) or left.kind != right.kind) {
|
|
try fail(state, id, .invalid_operand, expression.span)
|
|
} else if (expression.operator == .divide and left.kind != .float) {
|
|
try fail(state, id, .integer_division, expression.span)
|
|
}
|
|
}
|
|
.range: {
|
|
expression :: ast.range_expr(tree, id)
|
|
start_type :: state.types[usize(expression.start)]
|
|
end_type :: state.types[usize(expression.end)]
|
|
family TypeKind :: if (start_type.kind == .usize or end_type.kind == .usize) .usize else .int
|
|
if (start_type.kind != .invalid and start_type.kind != family) {
|
|
try fail(state, expression.start, .invalid_range_bound, ast.node_span(tree, expression.start))
|
|
}
|
|
if (end_type.kind != .invalid and end_type.kind != family) {
|
|
try fail(state, expression.end, .invalid_range_bound, ast.node_span(tree, expression.end))
|
|
}
|
|
}
|
|
.array_literal: {
|
|
actual :: state.types[usize(id)]
|
|
if (actual.kind != .array) return
|
|
element :: state.arrays.items[usize(actual.array_type)].element
|
|
for 0..ast.array_element_count(tree, id) |i| {
|
|
child :: ast.array_element(tree, id, i)
|
|
if (element.kind == .void or element.kind == .range) {
|
|
try fail(state, child, .invalid_array_element_type, ast.node_span(tree, child))
|
|
} else {
|
|
try compatible(state, child, element)
|
|
}
|
|
}
|
|
if (array_cells(state, actual) == null) try fail(state, id, .array_size_overflow, ast.node_span(tree, id))
|
|
}
|
|
.index: {
|
|
view :: ast.index_expr(tree, id)
|
|
base :: state.types[usize(view.base)]
|
|
index :: state.types[usize(view.index)]
|
|
if (index.kind != .invalid and index.kind != .usize) {
|
|
try fail(state, view.index, .invalid_index_type, ast.node_span(tree, view.index))
|
|
}
|
|
if (base.kind != .invalid and base.kind != .array) {
|
|
try fail(state, id, .not_indexable, ast.node_span(tree, view.base))
|
|
}
|
|
}
|
|
.call: try validate_call(state, id)
|
|
else: {}
|
|
}
|
|
}
|
|
else: {}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
validate_call proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
expression :: ast.call_expr(tree, id)
|
|
callee :: state.types[usize(expression.callee)]
|
|
signature :: group_type(state, expression.callee)
|
|
if (signature.function == ast.NodeId(maxval!(u32))) {
|
|
if (callee.kind != .invalid) {
|
|
try fail(state, id, .not_callable, ast.node_span(tree, expression.callee))
|
|
}
|
|
return
|
|
}
|
|
parameter_count :: ast.function_param_count(tree, signature.function)
|
|
if (parameter_count != ast.call_arg_count(tree, id)) {
|
|
diagnostic :: try diagnostics.add(state.diagnostics, .argument_count_mismatch, expression.span)
|
|
if (callee.kind != .invalid) state.types[usize(id)] = invalid_type(diagnostic)
|
|
}
|
|
for (0..ast.call_arg_count(tree, id)) |i| {
|
|
if (i >= parameter_count) continue
|
|
parameter :: ast.function_param(tree, signature.function, i)
|
|
try compatible(state, ast.call_arg(tree, id, i), state.types[usize(parameter)])
|
|
}
|
|
}
|
|
|
|
|
|
@hide:file
|
|
block_falls_through proc(state @State, id ast.NodeId) bool {
|
|
tree :: state.tree
|
|
for (0..ast.block_statement_count(tree, id)) |i| {
|
|
statement :: ast.block_statement(tree, id, i)
|
|
kind :: ast.stmt_kind(tree, statement)
|
|
source :: if (kind == .expression) ast.statement_expr(tree, statement) else statement
|
|
if (state.types[usize(source)].kind == .invalid) return false
|
|
match kind {
|
|
.return_stmt, .break_stmt, .continue_stmt, .invalid: return false
|
|
.if_stmt: {
|
|
conditional :: ast.if_stmt(tree, statement)
|
|
then_falls :: block_falls_through(state, conditional.then_block)
|
|
if (conditional.else_block) |other| {
|
|
if (!then_falls and !block_falls_through(state, other)) return false
|
|
}
|
|
}
|
|
else: {}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
@hide:file
|
|
ConstantInteger :: struct {
|
|
magnitude u64
|
|
negative bool = false
|
|
}
|
|
|
|
@hide:file
|
|
constant_integer proc(state @mut State, id ast.NodeId) ?ConstantInteger {
|
|
if (state.cells[usize(id)].constant_visiting) return null
|
|
state.cells[usize(id)].constant_visiting = true
|
|
defer state.cells[usize(id)].constant_visiting = false
|
|
match ast.expr_kind(state.tree, id) {
|
|
.literal_int: {
|
|
text :: ast.source_text(state.tree, ast.node_span(state.tree, id))
|
|
value := u64(0)
|
|
for text |byte| {
|
|
if (byte < '0' or byte > '9') return null
|
|
digit :: u64(byte - '0')
|
|
if (value > divtrunc!(maxval!(u64) - digit, u64(10))) return null
|
|
value = value * 10 + digit
|
|
}
|
|
return ConstantInteger{ magnitude = value }
|
|
}
|
|
.identifier: {
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind != .declaration) return null
|
|
target :: binding.data.declaration
|
|
if (!state.cells[usize(target)].count_declaration) return null
|
|
declaration :: ast.statement_decl(state.tree, target)
|
|
if (declaration.mutability != .constant) return null
|
|
if (declaration.type) |annotation| {
|
|
type_binding :: sema.binding(state.resolution, annotation)
|
|
if (type_binding.kind != .builtin) return null
|
|
kind :: type_binding.data.builtin
|
|
if (kind != .int and kind != .i64 and kind != .usize) return null
|
|
}
|
|
return constant_integer(state, declaration.initializer)
|
|
}
|
|
.unary: {
|
|
view :: ast.unary_expr(state.tree, id)
|
|
if (view.operator != .negate) return null
|
|
if (constant_integer(state, view.operand)) |value| {
|
|
return ConstantInteger{ magnitude = value.magnitude, negative = value.magnitude != 0 and !value.negative }
|
|
}
|
|
return null
|
|
}
|
|
.binary: {
|
|
view :: ast.binary_expr(state.tree, id)
|
|
left := ConstantInteger{ magnitude = 0 }
|
|
right := ConstantInteger{ magnitude = 0 }
|
|
if (constant_integer(state, view.left)) |value| left = value else return null
|
|
if (constant_integer(state, view.right)) |value| right = value else return null
|
|
if (view.operator == .multiply) {
|
|
if (right.magnitude != 0 and left.magnitude > divtrunc!(maxval!(u64), right.magnitude)) return null
|
|
magnitude :: left.magnitude * right.magnitude
|
|
return ConstantInteger{ magnitude = magnitude, negative = magnitude != 0 and left.negative != right.negative }
|
|
}
|
|
if (view.operator != .add and view.operator != .subtract) return null
|
|
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 null
|
|
return ConstantInteger{ magnitude = left.magnitude + right.magnitude, negative = left.negative }
|
|
}
|
|
if (left.magnitude < right.magnitude) {
|
|
return ConstantInteger{ magnitude = right.magnitude - left.magnitude, negative = right.negative }
|
|
}
|
|
return ConstantInteger{ magnitude = left.magnitude - right.magnitude, negative = left.magnitude != right.magnitude and left.negative }
|
|
}
|
|
else: return null
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
intern_array proc(state @mut State, descriptor ArrayType) Type ! mem.AllocError {
|
|
for state.arrays.items |existing, i| {
|
|
if (existing.len == descriptor.len and existing.mutable == descriptor.mutable
|
|
and existing.element.kind == descriptor.element.kind
|
|
and existing.element.function == descriptor.element.function
|
|
and existing.element.array_type == descriptor.element.array_type) {
|
|
return Type{ kind = .array, array_type = ArrayId(i) }
|
|
}
|
|
}
|
|
try arraylist.append(&state.arrays, descriptor)
|
|
return Type{ kind = .array, array_type = ArrayId(state.arrays.items.len - 1) }
|
|
}
|
|
|
|
@hide:file
|
|
same_type proc(state @State, left, right Type) bool {
|
|
if (left.kind != right.kind) return false
|
|
if (left.kind == .function) return same_signature(state, left.function, right.function)
|
|
if (left.kind != .array) return true
|
|
a :: state.arrays.items[usize(left.array_type)]
|
|
b :: state.arrays.items[usize(right.array_type)]
|
|
return a.len == b.len and a.mutable == b.mutable and same_type(state, a.element, b.element)
|
|
}
|
|
|
|
@hide:file
|
|
array_cells proc(state @State, type Type) ?usize {
|
|
if (type.kind != .array) return usize(1)
|
|
view :: state.arrays.items[usize(type.array_type)]
|
|
if (view.len == no_index) return null
|
|
child := usize(0)
|
|
if (array_cells(state, view.element)) |value| child = value else return null
|
|
if (child != 0 and view.len > divtrunc!(maxval!(usize), child)) return null
|
|
return view.len * child
|
|
}
|
|
|
|
@hide:file
|
|
array_origin proc(state @mut State, id ast.NodeId) ast.NodeId {
|
|
origin :: state.cells[root(state, usize(id))].literal
|
|
if (origin != ast.NodeId(maxval!(u32))) return origin
|
|
if (state.cells[usize(id)].role == .expression and ast.expr_kind(state.tree, id) == .index) {
|
|
base :: array_origin(state, ast.index_expr(state.tree, id).base)
|
|
if (base != ast.NodeId(maxval!(u32)) and ast.array_element_count(state.tree, base) != 0) {
|
|
return array_origin(state, ast.array_element(state.tree, base, 0))
|
|
}
|
|
}
|
|
return ast.NodeId(maxval!(u32))
|
|
}
|
|
|
|
@hide:file
|
|
unify_elements proc(state @mut State, left, right ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.types[usize(left)].kind == .invalid or state.types[usize(right)].kind == .invalid) return
|
|
a :: array_origin(state, left)
|
|
b :: array_origin(state, right)
|
|
if (a != ast.NodeId(maxval!(u32)) and b != ast.NodeId(maxval!(u32))) {
|
|
count :: ast.array_element_count(state.tree, a)
|
|
if (count != ast.array_element_count(state.tree, b)) return
|
|
for (0..count) |i| try unify_elements(state, ast.array_element(state.tree, a, i), ast.array_element(state.tree, b, i))
|
|
return
|
|
}
|
|
left_type :: group_type(state, left)
|
|
right_type :: group_type(state, right)
|
|
if (numeric_kind(left_type.kind)) try demand(state, right, left_type, .type_mismatch)
|
|
if (numeric_kind(right_type.kind)) try demand(state, left, right_type, .type_mismatch)
|
|
left_root :: root(state, usize(left))
|
|
right_root :: root(state, usize(right))
|
|
if (state.cells[left_root].numeric and state.cells[right_root].numeric) {
|
|
try numeric_constraint(state, left, right, right)
|
|
}
|
|
if (left_type.kind == .array) try demand(state, right, left_type, .type_mismatch)
|
|
if (right_type.kind == .array) try demand(state, left, right_type, .type_mismatch)
|
|
}
|
|
|
|
@hide:file
|
|
infer_shape proc(state @mut State, id ast.NodeId, defaults bool) Type ! (mem.AllocError | diagnostics.CapacityError) {
|
|
index :: root(state, usize(id))
|
|
if (state.cells[index].visiting) return state.cells[index].type
|
|
if (state.cells[index].type.kind == .invalid) return state.cells[index].type
|
|
state.cells[index].visiting = true
|
|
defer state.cells[index].visiting = false
|
|
if (state.cells[usize(id)].role == .expression and ast.expr_kind(state.tree, id) == .identifier) {
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .declaration) {
|
|
target :: binding.data.declaration
|
|
if (state.cells[usize(target)].role == .declaration and state.cells[usize(target)].fixed
|
|
and has_inferred_count(state, state.cells[usize(target)].type)) {
|
|
declaration :: ast.statement_decl(state.tree, target)
|
|
actual :: try infer_shape(state, declaration.initializer, defaults)
|
|
if (actual.kind == .array and !has_inferred_count(state, actual)) {
|
|
try specialize_annotation(state, declaration.type?, actual)
|
|
state.cells[usize(target)].type = state.types[usize(declaration.type?)]
|
|
seed(state, id, state.cells[usize(target)].type)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
literal :: state.cells[index].literal
|
|
if (literal != ast.NodeId(maxval!(u32))) {
|
|
len :: ast.array_element_count(state.tree, literal)
|
|
expected :: state.cells[index].expected
|
|
element := Type{}
|
|
mutable := false
|
|
if (expected.kind == .array) {
|
|
view :: state.arrays.items[usize(expected.array_type)]
|
|
element = view.element
|
|
mutable = view.mutable
|
|
}
|
|
for 0..len |i| {
|
|
child :: ast.array_element(state.tree, literal, i)
|
|
actual :: try infer_shape(state, child, defaults)
|
|
if (element.kind == .none and actual.kind != .none and actual.kind != .invalid) element = actual
|
|
if (element.kind == .array and actual.kind == .array) element = try specialize_type(state, element, actual)
|
|
if (element.kind != .none) try demand(state, child, element, .type_mismatch)
|
|
}
|
|
if (element.kind == .none and len == 0 and defaults) element = Type{ kind = .int }
|
|
if (element.kind != .none) {
|
|
type :: try intern_array(state, ArrayType{ element = element, len = len, mutable = mutable })
|
|
state.cells[index].type = type
|
|
return type
|
|
}
|
|
return Type{}
|
|
}
|
|
if (state.cells[usize(id)].role == .expression and ast.expr_kind(state.tree, id) == .index) {
|
|
view :: ast.index_expr(state.tree, id)
|
|
base :: try infer_shape(state, view.base, defaults)
|
|
if (base.kind == .array) {
|
|
element :: state.arrays.items[usize(base.array_type)].element
|
|
seed(state, id, element)
|
|
return element
|
|
}
|
|
origin :: array_origin(state, view.base)
|
|
if (origin != ast.NodeId(maxval!(u32)) and ast.array_element_count(state.tree, origin) != 0) {
|
|
child :: ast.array_element(state.tree, origin, 0)
|
|
child_root :: root(state, usize(child))
|
|
if (state.cells[child_root].numeric) {
|
|
try numeric_constraint(state, id, child, id)
|
|
}
|
|
}
|
|
}
|
|
return group_type(state, id)
|
|
}
|
|
|
|
@hide:file
|
|
prepare_shapes proc(state @mut State, assignment_values, defaults bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
for 0..(state.cells.len) |i| {
|
|
if (state.cells[i].role != .expression or state.cells[i].assignment_value != assignment_values) continue
|
|
id :: ast.NodeId(i)
|
|
if (
|
|
ast.expr_kind(state.tree, id) == .array_literal
|
|
and state.cells[root(state, i)].expected.kind != .array
|
|
) {
|
|
len :: ast.array_element_count(state.tree, id)
|
|
for (usize(1)..len) |j| try unify_elements(state, ast.array_element(state.tree, id, 0), ast.array_element(state.tree, id, j))
|
|
}
|
|
_ = try infer_shape(state, id, defaults)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
apply_contexts proc(state @mut State, assignment_values, early bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
for 0..(state.cells.len) |i| {
|
|
id :: ast.NodeId(i)
|
|
if (!assignment_values and state.cells[i].role == .declaration) {
|
|
view :: ast.statement_decl(tree, id)
|
|
if (view.type) |annotation| try context_demand(state, view.initializer, state.types[usize(annotation)], .type_mismatch, early)
|
|
}
|
|
if (!assignment_values and state.cells[i].role == .return_stmt) {
|
|
if (ast.return_stmt(tree, id).value) |value| {
|
|
try context_demand(state, value, state.types[usize(state.cells[i].return_annotation)], .return_type_mismatch, early)
|
|
}
|
|
}
|
|
if (assignment_values and state.cells[i].role == .assignment_stmt) {
|
|
view :: ast.assignment_stmt(tree, id)
|
|
if (mutable_target(state, view.target)) try context_demand(state, view.value, state.types[usize(view.target)], .type_mismatch, early)
|
|
}
|
|
if (state.cells[i].role != .expression or state.cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .call) continue
|
|
signature :: group_type(state, ast.call_expr(tree, id).callee)
|
|
if (signature.function == ast.NodeId(maxval!(u32))) continue
|
|
count :: ast.function_param_count(tree, signature.function)
|
|
for 0..ast.call_arg_count(tree, id) |j| {
|
|
if (j >= count) continue
|
|
parameter :: ast.function_param(tree, signature.function, j)
|
|
try context_demand(state, ast.call_arg(tree, id, j), state.cells[usize(parameter)].type, .type_mismatch, early)
|
|
}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
context_demand proc(state @mut State, id ast.NodeId, expected Type, code diagnostics.Code, early bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (early and expected.kind != .array and expected.kind != .usize) return
|
|
try demand(state, id, expected, code)
|
|
}
|
|
|
|
@hide:file
|
|
bound_family proc(state @mut State, id ast.NodeId) TypeKind {
|
|
index :: root(state, usize(id))
|
|
if (state.cells[index].type.kind != .none) return state.cells[index].type.kind
|
|
if (state.cells[index].demand != .none) return state.cells[index].demand
|
|
producer :: state.cells[index].producer
|
|
if (producer == ast.NodeId(maxval!(u32)) or state.cells[index].visiting) return .none
|
|
state.cells[index].visiting = true
|
|
defer state.cells[index].visiting = false
|
|
if (ast.expr_kind(state.tree, producer) == .unary) return bound_family(state, ast.unary_expr(state.tree, producer).operand)
|
|
view :: ast.binary_expr(state.tree, producer)
|
|
left :: bound_family(state, view.left)
|
|
right :: bound_family(state, view.right)
|
|
if (left == .float or right == .float) return .float
|
|
if (left == .usize or right == .usize) return .usize
|
|
if (left == .int or right == .int) return .int
|
|
return .none
|
|
}
|
|
|
|
@hide:file
|
|
prepare_ranges proc(state @mut State, assignment_values, constrain bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
for 0..(state.cells.len) |i| {
|
|
id :: ast.NodeId(i)
|
|
if (state.cells[i].role != .expression or state.cells[i].assignment_value != assignment_values or ast.expr_kind(tree, id) != .range) continue
|
|
view :: ast.range_expr(tree, id)
|
|
left :: bound_family(state, view.start)
|
|
right :: bound_family(state, view.end)
|
|
family TypeKind :: if (left == .usize or right == .usize) .usize else .int
|
|
if (constrain) {
|
|
try range_bound_context(state, view.start, family)
|
|
try range_bound_context(state, view.end, family)
|
|
}
|
|
if (group_type(state, id).kind != .invalid) {
|
|
seed(state, id, Type{ kind = .range, range_element = family })
|
|
state.types[i] = group_type(state, id)
|
|
}
|
|
capture :: state.cells[i].capture
|
|
if (capture != ast.NodeId(maxval!(u32)) and state.cells[usize(capture)].type.kind != .invalid) {
|
|
seed(state, capture, Type{ kind = family })
|
|
}
|
|
}
|
|
for 0..(state.cells.len) |i| {
|
|
id :: ast.NodeId(i)
|
|
if (state.cells[i].role != .expression or state.cells[i].assignment_value or ast.expr_kind(tree, id) != .identifier) continue
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .declaration and state.cells[usize(binding.data.declaration)].role == .loop_capture) {
|
|
seed(state, id, group_type(state, binding.data.declaration))
|
|
}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
has_inferred_count proc(state @State, type Type) bool {
|
|
if (type.kind != .array) return false
|
|
view :: state.arrays.items[usize(type.array_type)]
|
|
return view.len == no_index or has_inferred_count(state, view.element)
|
|
}
|
|
|
|
@hide:file
|
|
specialize_type proc(state @mut State, expected, actual Type) Type ! mem.AllocError {
|
|
if (expected.kind != .array or actual.kind != .array) return expected
|
|
view := state.arrays.items[usize(expected.array_type)]
|
|
source :: state.arrays.items[usize(actual.array_type)]
|
|
if (view.len == no_index) view.len = source.len
|
|
view.element = try specialize_type(state, view.element, source.element)
|
|
return try intern_array(state, view)
|
|
}
|
|
|
|
@hide:file
|
|
specialize_annotation proc(state @mut State, id ast.NodeId, actual Type) void ! mem.AllocError {
|
|
expected :: try specialize_type(state, state.types[usize(id)], actual)
|
|
state.types[usize(id)] = expected
|
|
state.cells[usize(id)].type = expected
|
|
if (expected.kind == .array and ast.expr_kind(state.tree, id) == .array_type) {
|
|
try specialize_annotation(state, ast.array_type(state.tree, id).element, state.arrays.items[usize(expected.array_type)].element)
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
specialize_annotations proc(state @mut State) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
for 0..(state.cells.len) |i| {
|
|
if (state.cells[i].role != .declaration) continue
|
|
view :: ast.statement_decl(state.tree, ast.NodeId(i))
|
|
if (view.type) |annotation| {
|
|
actual :: try infer_shape(state, view.initializer, true)
|
|
try specialize_annotation(state, annotation, actual)
|
|
if (state.cells[i].type.kind != .invalid) state.cells[i].type = state.types[usize(annotation)]
|
|
}
|
|
}
|
|
for 0..(state.cells.len) |i| {
|
|
if (state.cells[i].role != .annotation or state.types[i].kind != .array) continue
|
|
if (has_inferred_count(state, state.types[i])) {
|
|
try fail(state, ast.NodeId(i), .invalid_array_length, ast.node_span(state.tree, ast.NodeId(i)))
|
|
state.cells[i].type = state.types[i]
|
|
} else if (array_cells(state, state.types[i]) == null) {
|
|
try fail(state, ast.NodeId(i), .array_size_overflow, ast.node_span(state.tree, ast.NodeId(i)))
|
|
state.cells[i].type = state.types[i]
|
|
}
|
|
}
|
|
for 0..(state.cells.len) |i| {
|
|
id :: ast.NodeId(i)
|
|
if (state.cells[i].role != .expression or state.cells[i].assignment_value or ast.expr_kind(state.tree, id) != .identifier) continue
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .declaration and state.cells[usize(binding.data.declaration)].fixed) {
|
|
seed(state, id, state.cells[usize(binding.data.declaration)].type)
|
|
}
|
|
}
|
|
}
|