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feat: impl 关键字改为 extend

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刘航宇
2026-06-05 19:50:40 +08:00
parent 175f8a6658
commit 6fc599e6c2
8 changed files with 16 additions and 16 deletions
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src/parser/parser.c
+5 -5
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@@ -777,21 +777,21 @@ AstNode* parse(Arena* a, const Token* tokens, size_t count,
AstNode* enum_decl = ast_make_enum_decl(p.arena, arena_strdup_impl(p.arena, name->start, name->length), v_arr, vcount, tok_loc(name));
if (enum_count >= 64) { error->message = "枚举过多 (最多64)"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
enums[enum_count++] = enum_decl;
} else if (peek(&p)->kind == TOK_IMPL) {
} else if (peek(&p)->kind == TOK_EXTEND) {
const Token* i_tok = advance(&p);
const Token* st_name = expect(&p, TOK_IDENT, error, "impl 后应为结构体名");
const Token* st_name = expect(&p, TOK_IDENT, error, "extend 后应为结构体名");
if (!st_name) return NULL;
if (!expect(&p, TOK_LBRACE, error, "缺少 '{'")) return NULL;
AstNode* methods[64]; int mcount = 0;
while (peek(&p)->kind != TOK_RBRACE && !error->message) {
if (mcount >= 64) { error->message = "方法过多 (最多64)"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
if (peek(&p)->kind != TOK_FN) { error->message = "impl 块内只允许 fn"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
if (peek(&p)->kind != TOK_FN) { error->message = "extend 块内只允许 fn"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
methods[mcount++] = parse_function(&p, error);
}
if (!expect(&p, TOK_RBRACE, error, "缺少 '}'")) return NULL;
AstNode** m_arr = arena_alloc_impl(p.arena, mcount * sizeof(AstNode*));
memcpy(m_arr, methods, mcount * sizeof(AstNode*));
if (impl_count >= 64) { error->message = "impl 块过多 (最多64)"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
if (impl_count >= 64) { error->message = "extend 块过多 (最多64)"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
impls[impl_count++] = ast_make_impl_block(p.arena,
arena_strdup_impl(p.arena, st_name->start, st_name->length),
m_arr, mcount, tok_loc(i_tok));
@@ -799,7 +799,7 @@ AstNode* parse(Arena* a, const Token* tokens, size_t count,
if (fn_count >= 256) { error->message = "函数过多 (最多256)"; error->filename = p.filename; error->line = peek(&p)->line; error->col = peek(&p)->col; return NULL; }
functions[fn_count++] = parse_function(&p, error);
} else {
error->message = "顶层只允许 fn、struct、type、enum 或 impl";
error->message = "顶层只允许 fn、struct、type、enum 或 extend";
error->filename = p.filename;
error->line = peek(&p)->line;
error->col = peek(&p)->col;