style: use snake_case for constants

docs/style.md

@@ -4,7 +4,7 @@ these guidelines apply to Honey programs, the compiler, and the standard library
 
 ## names
 
-- use `snake_case` for procedures, variables, fields, and enum members; `PascalCase` for types; `SCREAMING_SNAKE_CASE` for named sentinel constants.
+- use `snake_case` for procedures, variables, constants, fields, and enum members; `PascalCase` for types.
 - choose names that describe the value or operation. short loop indices are appropriate when their meaning is local. preserve external ABI names.
 - qualify imported operations with their module, such as `mem.alloc` and `ast.node_count`. mark file-local implementation details with `@hide:file`.
 

source/ast/ast.hon

@@ -14,12 +14,12 @@ import "@source/diagnostics"
 
 Span :: alias diagnostics.Span
 DiagnosticId :: alias diagnostics.DiagnosticId
-NO_DIAGNOSTIC :: alias diagnostics.NO_DIAGNOSTIC
+no_diagnostic :: alias diagnostics.no_diagnostic
 
 NodeId :: distinct u32
 
 @hide:file
-NO_NODE :: maxval!(NodeId)
+no_node :: maxval!(NodeId)
 
 LiteralKind :: enum {
     int, float, string
@@ -87,9 +87,9 @@ NodeData :: union {
 @hide:file
 Node :: struct {
     kind NodeKind
-    main NodeData = NodeData{ node_id = NO_NODE }
-    data0 NodeData = NodeData{ node_id = NO_NODE }
-    data1 NodeData = NodeData{ node_id = NO_NODE }
+    main NodeData = NodeData{ node_id = no_node }
+    data0 NodeData = NodeData{ node_id = no_node }
+    data1 NodeData = NodeData{ node_id = no_node }
 }
 
 @hide:file
@@ -267,7 +267,7 @@ add_statement_decl proc(
     mutability Mutability,
     initializer NodeId,
 ) NodeId ! mem.AllocError {
-    raw_type :: if (type) |id| u32(id) else u32(NO_NODE)
+    raw_type :: if (type) |id| u32(id) else u32(no_node)
     extra :: try add_extra(builder, name.start)
     _ = try add_extra(builder, name.end)
     _ = try add_extra(builder, raw_type)
@@ -591,12 +591,12 @@ get_span proc(storage @Storage, id NodeId) Span {
 
 @hide:file
 node_id proc(index usize) NodeId {
-    debug.assert(u64(index) < u64(NO_NODE))
+    debug.assert(u64(index) < u64(no_node))
     return NodeId(index)
 }
 
 @hide:file
 maybe_node_id proc(value u32) ?NodeId {
-    if (value == u32(NO_NODE)) return null
+    if (value == u32(no_node)) return null
     return NodeId(value)
 }

source/diagnostics/diagnostics.hon

@@ -7,7 +7,7 @@ Span :: struct {
 }
 
 DiagnosticId :: distinct u32
-NO_DIAGNOSTIC :: maxval!(DiagnosticId)
+no_diagnostic :: maxval!(DiagnosticId)
 
 Code :: enum {
     invalid_character,
@@ -40,7 +40,7 @@ deinit proc(store @mut Store) void {
 
 #! allocates from the retained allocator; the returned ID is valid until deinit.
 add proc(store @mut Store, code Code, span Span) DiagnosticId ! (mem.AllocError | CapacityError) {
-    if (store.list.items.len >= usize(NO_DIAGNOSTIC)) return .diagnostic_limit_reached
+    if (store.list.items.len >= usize(no_diagnostic)) return .diagnostic_limit_reached
     id :: DiagnosticId(store.list.items.len)
     try arraylist.append(&store.list, Diagnostic{ code = code, span = span })
     return id

source/lexer/scan.hon

@@ -260,9 +260,9 @@ scan_ident proc(start usize, program []u8) ScanIdentResult {
     # don't intern keywords (already O(1) lookup via token kind)
     kind :: strmap.get(&keywords, program[start..cursor]) orelse .ident
     str_id :: if (kind == .ident)
-        strpool.intern(&strpool.strings, program[start..cursor]) catch strpool.NO_STR
+        strpool.intern(&strpool.strings, program[start..cursor]) catch strpool.no_str
     else
-        strpool.NO_STR
+        strpool.no_str
     return ScanIdentResult{ end = cursor, kind = kind, str_id = str_id }
 }
 

source/lexer/token.hon

@@ -3,7 +3,7 @@ import "@source/diagnostics"
 import "@source/strpool"
 
 TokenId :: distinct u32
-NO_TOKEN :: maxval!(TokenId)
+no_token :: maxval!(TokenId)
 
 TokenData :: union {
     str_id strpool.StringId
@@ -13,7 +13,7 @@ TokenData :: union {
 Token :: struct {
     span diagnostics.Span
     kind TokenKind
-    data TokenData = TokenData{ str_id = strpool.NO_STR }
+    data TokenData = TokenData{ str_id = strpool.no_str }
 }
 
 TokenKind :: enum {
@@ -73,6 +73,6 @@ render_token proc(token Token, program []u8) void {
 }
 
 token_id proc(index uint) TokenId {
-    debug.assert(u64(index) < u64(NO_TOKEN))
+    debug.assert(u64(index) < u64(no_token))
     return TokenId(index)
 }

source/parser/parse.hon

@@ -332,7 +332,7 @@ parse_primary proc(state @mut State) ast.NodeId ! ParseError {
             return try ast.add_identifier(&state.builder, token.span)
         }
         else: {
-            diagnostic :: if (token.data.diagnostic != diagnostics.NO_DIAGNOSTIC)
+            diagnostic :: if (token.data.diagnostic != diagnostics.no_diagnostic)
                 token.data.diagnostic
             else
                 try diagnostics.add(state.diagnostics, .unexpected_token, token.span)

source/sema/resolve.hon

@@ -26,7 +26,7 @@ BindingData :: union {
 
 Binding :: struct {
     kind BindingKind = .none
-    data BindingData = BindingData{ diagnostic = diagnostics.NO_DIAGNOSTIC }
+    data BindingData = BindingData{ diagnostic = diagnostics.no_diagnostic }
 }
 
 @hide:file

source/strpool/strpool.hon

@@ -6,7 +6,7 @@ InternError :: enum { out_of_space }
 
 StringId :: alias u32
 
-NO_STR :: maxval!(StringId)
+no_str :: maxval!(StringId)
 
 #! global pool owned by main.hon; initialize before scanning and release with deinit.
 strings StringPool := undefined
@@ -38,7 +38,7 @@ deinit proc(pool @mut StringPool) void {
 intern proc(pool @mut StringPool, str []u8) StringId ! (mem.AllocError | InternError) {
     if hashmap.get(&pool.ids, str) |id| return id
 
-    if (pool.strings.items.len >= usize(NO_STR)) return .out_of_space
+    if (pool.strings.items.len >= usize(no_str)) return .out_of_space
     id :: StringId(pool.strings.items.len)
 
     owned_str []mut u8 :: try mem.alloc(u8, pool.allocator, str.len)