feat(parser): 实现赋值表达式和常量表达式解析功能

- 添加 scc_parse_assignment_expression 函数用于解析赋值表达式
- 添加 scc_parser_constant_expression 函数用于解析常量表达式
- 修改 cast 表达式解析逻辑，修复类型转换解析问题
- 改进错误处理机制，使用 SCC_ERROR 替代 LOG_ERROR 并提供准确位置信息
- 移除未使用的变量声明，优化代码结构

refactor(ast): 调整类型定义中的 typedef 类型存储结构

- 将 scc_ast_type 中的 underlying 字段改为 decl 字段
- 更新相关初始化函数以适配新的字段名称
- 修复枚举类型初始化时缺失的 decl 字段设置

feat(ast): 添加类型转换、sizeof 和 alignof 表达式的初始化函数

- 实现 scc_ast_expr_cast_init 用于初始化类型转换表达式
- 实现 scc_ast_expr_sizeof_init 用于初始化 sizeof 表达式
- 实现 scc_ast_expr_alignof_init 用于初始化 alignof 表达式
- 完善表达式类型的支持

chore(parser): 增加语义分析回调接口和位置获取工具函数

- 添加 scc_parse_decl_sema、scc_parse_type_sema 等语义分析辅助函数
- 提供 scc_parser_got_current_pos 函数获取当前解析位置
- 增强错误报告的准确性

refactor(dump): 完善 AST 转储功能，支持 break 和 continue 语句

- 为 SCC_AST_STMT_BREAK 和 SCC_AST_STMT_CONTINUE 添加转储支持
- 优化转储函数的分支处理结构

libs/ast/include/ast_def.h

@@ -189,7 +189,7 @@ struct scc_ast_type {
         } enumeration;
         struct {
             const char *name;
-            scc_ast_type_t *underlying;
+            scc_ast_decl_t *decl;
         } typedef_type;
     };
 };

libs/ast/include/scc_ast.h

@@ -341,10 +341,33 @@ static inline void scc_ast_expr_ptr_member_init(scc_ast_expr_t *expr,
     _scc_ast_expr_member_init(expr, SCC_AST_EXPR_PTR_MEMBER, object, member);
 }
 
-// TODO
-// SCC_AST_EXPR_CAST,             // 类型转换
-// SCC_AST_EXPR_SIZE_OF,          // sizeof
-// SCC_AST_EXPR_ALIGN_OF,         // _Alignof
+static inline void scc_ast_expr_cast_init(scc_ast_expr_t *expr,
+                                          scc_ast_type_t *type,
+                                          scc_ast_expr_t *operand) {
+    Assert(expr != null && type != null && operand != null);
+    expr->base.loc = scc_pos_create();
+    expr->base.type = SCC_AST_EXPR_CAST;
+    expr->cast.type = type;
+    expr->cast.expr = operand;
+}
+
+static inline void scc_ast_expr_sizeof_init(scc_ast_expr_t *expr,
+                                            scc_ast_type_t *type) {
+    Assert(expr != null && type != null);
+    expr->base.loc = scc_pos_create();
+    expr->base.type = SCC_AST_EXPR_SIZE_OF;
+    expr->attr_of.type = type;
+    expr->attr_of.expr = null;
+}
+
+static inline void scc_ast_expr_alignof_init(scc_ast_expr_t *expr,
+                                             scc_ast_type_t *type) {
+    Assert(expr != null && type != null);
+    expr->base.loc = scc_pos_create();
+    expr->base.type = SCC_AST_EXPR_SIZE_OF;
+    expr->attr_of.type = type;
+    expr->attr_of.expr = null;
+}
 
 // init can be null
 static inline void
@@ -486,18 +509,18 @@ static inline void scc_ast_type_enum_init(scc_ast_type_t *type,
     type->base.type = SCC_AST_TYPE_ENUM;
     type->quals = (scc_ast_decl_specifier_t){0}; // FIXME
     type->enumeration.name = name;
-    type->enumeration.decl = null;
+    type->enumeration.decl = decl;
 }
 
 static inline void scc_ast_type_typedef_init(scc_ast_type_t *type,
                                              const char *name,
-                                             scc_ast_type_t *target) {
+                                             scc_ast_decl_t *target) {
     Assert(type != null && target != null);
     type->base.loc = scc_pos_create();
     type->base.type = SCC_AST_TYPE_TYPEDEF;
     type->quals = (scc_ast_decl_specifier_t){0}; // FIXME
     type->typedef_type.name = name;
-    type->typedef_type.underlying = target;
+    type->typedef_type.decl = target;
 }
 
 #endif /* __SCC_AST_H__ */

libs/ast/src/ast_dump.c

@@ -567,6 +567,10 @@ static void dump_stmt_impl(scc_ast_stmt_t *stmt, scc_tree_dump_ctx_t *ctx) {
         dump_child_node((scc_ast_node_t *)stmt->case_stmt.stmt, ctx, true);
         break;
 
+    case SCC_AST_STMT_BREAK:
+    case SCC_AST_STMT_CONTINUE:
+        break;
+
     case SCC_AST_STMT_DEFAULT:
         end_node_dump(ctx);
         dump_child_node((scc_ast_node_t *)stmt->default_stmt.stmt, ctx, true);

libs/parser/include/parser_utils.h

@@ -71,4 +71,13 @@ static inline void scc_parser_reset(scc_parser_t *parser) {
     scc_ring_reset(*parser->ring);
 }
 
+#include <scc_pos_log.h>
+static inline scc_pos_t scc_parser_got_current_pos(scc_parser_t *parser) {
+    const scc_lexer_tok_t *tok = scc_parser_peek(parser);
+    scc_pos_t pos = scc_pos_create();
+    if (tok != null)
+        pos = tok->loc;
+    return pos;
+}
+
 #endif /* __SCC_PARSER_UTILS_H__ */

libs/parser/include/scc_parser.h

@@ -58,6 +58,8 @@ scc_ast_decl_t *scc_parse_declaration(scc_parser_t *parser);
  * @return 语句 AST 节点
  */
 scc_ast_stmt_t *scc_parse_statement(scc_parser_t *parser);
+scc_ast_expr_t *scc_parse_assignment_expression(scc_parser_t *parser);
+scc_ast_expr_t *scc_parser_constant_expression(scc_parser_t *parser);
 
 /**
  * @brief 解析表达式
@@ -75,4 +77,24 @@ scc_ast_node_t *_scc_parse_type(scc_parser_t *parser);
 
 scc_ast_type_t *scc_parse_type_name(scc_parser_t *parser);
 
+static inline void scc_parse_decl_sema(scc_parser_t *parser,
+                                       scc_ast_decl_t *decl) {
+    parser->sema_callbacks.on_decl(parser->sema_callbacks.context,
+                                   decl ? decl->base.type : SCC_AST_UNKNOWN,
+                                   decl);
+}
+
+static inline void scc_parse_type_sema(scc_parser_t *parser,
+                                       scc_ast_type_t *type) {
+    parser->sema_callbacks.on_type(parser->sema_callbacks.context,
+                                   type ? type->base.type : SCC_AST_UNKNOWN,
+                                   type);
+}
+
+static inline scc_ast_type_t *scc_parse_got_type(scc_parser_t *parser,
+                                                 const char *name) {
+    return parser->sema_callbacks.got_type(parser->sema_callbacks.context,
+                                           name);
+}
+
 #endif /* __SCC_PARSER_H__ */

libs/parser/src/parse_decl.c

@@ -155,9 +155,6 @@ A.2.4 External definitions
 #include <scc_parser.h>
 
 scc_ast_decl_t *scc_parse_declaration(scc_parser_t *parser) {
-    cbool ok;
-    scc_lexer_tok_t tok;
-
     scc_ast_node_t *type_or_decl = _scc_parse_type(parser);
     scc_ast_decl_t *decl = null;
     if (type_or_decl == null) {
@@ -182,7 +179,7 @@ scc_ast_decl_t *scc_parse_declaration(scc_parser_t *parser) {
     } else if (SCC_AST_IS_A(scc_ast_decl_t, type_or_decl)) {
         decl = SCC_AST_CAST_TO(scc_ast_decl_t, type_or_decl);
     } else {
-        LOG_ERROR("invalid declaration");
+        SCC_ERROR(scc_parser_got_current_pos(parser), "invalid declaration");
         return null;
     }
 
@@ -195,7 +192,7 @@ scc_ast_decl_t *scc_parse_declaration(scc_parser_t *parser) {
         scc_ast_expr_t *init = scc_parse_expression(parser);
         decl->var.init = init;
         if (!scc_parser_consume_if(parser, SCC_TOK_SEMICOLON)) {
-            LOG_ERROR("expect semicolon");
+            SCC_ERROR(scc_parser_got_current_pos(parser), "expect semicolon");
         }
         goto RETURN;
     } else if (tok_ptr->type == SCC_TOK_L_BRACE) {
@@ -211,9 +208,6 @@ scc_ast_decl_t *scc_parse_declaration(scc_parser_t *parser) {
     }
 
 RETURN:
-    if (decl) {
-        parser->sema_callbacks.on_decl(parser->sema_callbacks.context,
-                                       decl->base.type, decl);
-    }
+    scc_parse_decl_sema(parser, decl);
     return decl;
 }

libs/parser/src/parse_expr.c

@@ -167,8 +167,6 @@ static scc_ast_expr_t *parse_logical_or_expression(scc_parser_t *parser);
 
 // 特殊结构：独立解析（右结合、条件、一元、后缀、基本）
 static scc_ast_expr_t *
-parse_assignment_expression(scc_parser_t *parser); // 右结合
-static scc_ast_expr_t *
 parse_conditional_expression(scc_parser_t *parser);                 // 右结合
 static scc_ast_expr_t *parse_cast_expression(scc_parser_t *parser); // 类型转换
 static scc_ast_expr_t *
@@ -520,7 +518,7 @@ static scc_ast_expr_t *parse_logical_or_expression(scc_parser_t *parser) {
 }
 
 // 赋值表达式（右结合）
-static scc_ast_expr_t *parse_assignment_expression(scc_parser_t *parser) {
+scc_ast_expr_t *scc_parse_assignment_expression(scc_parser_t *parser) {
     // 先解析左侧的 unary-expression（C 标准规定赋值左边必须是
     // unary-expression）
     scc_ast_expr_t *left = null;
@@ -542,7 +540,7 @@ static scc_ast_expr_t *parse_assignment_expression(scc_parser_t *parser) {
         scc_lexer_tok_drop(&op_tok);
 
         // 解析右侧（右结合：继续调用 parse_assignment_expression）
-        scc_ast_expr_t *right = parse_assignment_expression(parser);
+        scc_ast_expr_t *right = scc_parse_assignment_expression(parser);
         if (!right) {
             // 错误恢复
             parser_sync(parser);
@@ -577,7 +575,8 @@ static scc_ast_expr_t *parse_conditional_expression(scc_parser_t *parser) {
 
         // 消耗 ':'
         if (!scc_parser_consume_if(parser, SCC_TOK_COLON)) {
-            LOG_ERROR("Expected ':' after '?'");
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "Expected ':' after '?'");
             parser_sync(parser);
             return null;
         }
@@ -600,6 +599,7 @@ static scc_ast_expr_t *parse_cast_expression(scc_parser_t *parser) {
     if (tok && tok->type == SCC_TOK_L_PAREN) {
         // 尝试解析类型名
         scc_parser_store(parser);
+        scc_parser_next(parser);
         scc_ast_type_t *type = scc_parse_type_name(parser); // 需要外部实现
         if (type) {
             // 消耗了类型名后，下一个应该是 ')'
@@ -618,13 +618,12 @@ static scc_ast_expr_t *parse_cast_expression(scc_parser_t *parser) {
                 return expr;
             } else {
                 // 不是类型转换，回退
-                scc_parser_restore(parser);
                 // 释放 type（假设 scc_parse_type_name 分配了）
                 // TODO: scc_ast_type_drop(type);
             }
         } else {
-            // 解析类型名失败，回退
             scc_parser_restore(parser);
+            // 解析类型名失败，回退
         }
     }
     // 否则作为一元表达式
@@ -679,7 +678,8 @@ static scc_ast_expr_t *parse_sizeof_expression(scc_parser_t *parser) {
 
     const scc_lexer_tok_t *next = scc_parser_peek(parser);
     if (!next) {
-        LOG_ERROR("Unexpected end after sizeof");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Unexpected end after sizeof");
         return null;
     }
 
@@ -741,7 +741,8 @@ static scc_ast_expr_t *parse_postfix_expression(scc_parser_t *parser) {
                 return null;
             }
             if (!scc_parser_consume_if(parser, SCC_TOK_R_BRACKET)) {
-                LOG_ERROR("Expected ']' after subscript");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Expected ']' after subscript");
                 parser_sync(parser);
                 return null;
             }
@@ -766,7 +767,8 @@ static scc_ast_expr_t *parse_postfix_expression(scc_parser_t *parser) {
             // 解析参数列表
             if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
                 while (1) {
-                    scc_ast_expr_t *arg = parse_assignment_expression(parser);
+                    scc_ast_expr_t *arg =
+                        scc_parse_assignment_expression(parser);
                     if (!arg) {
                         parser_sync(parser);
                         // 释放已解析的参数
@@ -781,7 +783,8 @@ static scc_ast_expr_t *parse_postfix_expression(scc_parser_t *parser) {
                     } else if (scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
                         break;
                     } else {
-                        LOG_ERROR("Expected ',' or ')' in function call");
+                        SCC_ERROR(scc_parser_got_current_pos(parser),
+                                  "Expected ',' or ')' in function call");
                         parser_sync(parser);
                         // 释放资源
                         scc_free(call);
@@ -800,12 +803,14 @@ static scc_ast_expr_t *parse_postfix_expression(scc_parser_t *parser) {
             scc_lexer_tok_t ident_tok;
             if (!scc_parser_next_consume(parser, &ident_tok) ||
                 ident_tok.type != SCC_TOK_IDENT) {
-                LOG_ERROR("Expected identifier after member access");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Expected identifier after member access");
                 scc_lexer_tok_drop(&op_tok);
                 parser_sync(parser);
                 return null;
             }
             const char *name = scc_cstring_as_cstr(&ident_tok.lexeme);
+
             scc_ast_expr_t *member = expr_create(
                 parser, op_tok.type == SCC_TOK_DOT ? SCC_AST_EXPR_MEMBER
                                                    : SCC_AST_EXPR_PTR_MEMBER);
@@ -944,7 +949,8 @@ static scc_ast_expr_t *parse_paren_expression(scc_parser_t *parser) {
     }
 
     if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-        LOG_ERROR("Expected ')' after expression");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected ')' after expression");
         parser_sync(parser);
         return null;
     }
@@ -952,12 +958,12 @@ static scc_ast_expr_t *parse_paren_expression(scc_parser_t *parser) {
 }
 
 scc_ast_expr_t *scc_parse_expression(scc_parser_t *parser) {
-    scc_ast_expr_t *left = parse_assignment_expression(parser);
+    scc_ast_expr_t *left = scc_parse_assignment_expression(parser);
     if (!left)
         return null;
 
     while (scc_parser_consume_if(parser, SCC_TOK_COMMA)) {
-        scc_ast_expr_t *right = parse_assignment_expression(parser);
+        scc_ast_expr_t *right = scc_parse_assignment_expression(parser);
         if (!right) {
             parser_sync(parser);
             return null;
@@ -966,3 +972,7 @@ scc_ast_expr_t *scc_parse_expression(scc_parser_t *parser) {
     }
     return left;
 }
+
+scc_ast_expr_t *scc_parser_constant_expression(scc_parser_t *parser) {
+    return parse_conditional_expression(parser);
+}

libs/parser/src/parse_stmt.c

@@ -49,6 +49,7 @@ A.2.3 Statements
 
 #include <parser_utils.h>
 #include <scc_parser.h>
+
 static inline scc_ast_stmt_t *ast_stmt_alloc() {
     scc_ast_stmt_t *stmt = (scc_ast_stmt_t *)scc_malloc(sizeof(scc_ast_stmt_t));
     if (stmt == null) {
@@ -59,13 +60,15 @@ static inline scc_ast_stmt_t *ast_stmt_alloc() {
 
 static inline scc_ast_expr_t *ast_parse_paren_expression(scc_parser_t *parser) {
     if (!scc_parser_consume_if(parser, SCC_TOK_L_PAREN)) {
-        LOG_ERROR("Expected '(' before like `( expression )` .");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected '(' before like `( expression )` .");
     }
 
     scc_ast_expr_t *ret = scc_parse_expression(parser);
 
     if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-        LOG_ERROR("Expected ')' before like `( expression )` .");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected ')' before like `( expression )` .");
     }
     return ret;
 }
@@ -97,10 +100,16 @@ static scc_ast_stmt_t *parse_case_statement(scc_parser_t *parser) {
     }
 
     scc_ast_expr_t *expr = null;
-    // TODO  = scc_parser_constant_expression();
+    expr = scc_parser_constant_expression(parser);
+    if (expr == null) {
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected constant expression after case.");
+        return null;
+    }
 
     if (!scc_parser_consume_if(parser, SCC_TOK_COLON)) {
-        LOG_ERROR("Expected constant expression after case.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected `:` after case.");
         return null;
     }
 
@@ -120,7 +129,8 @@ static scc_ast_stmt_t *parse_default_statement(scc_parser_t *parser) {
     }
 
     if (!scc_parser_consume_if(parser, SCC_TOK_COLON)) {
-        LOG_ERROR("Expected constant expression after case.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected constant expression after case.");
         return null;
     }
 
@@ -150,7 +160,7 @@ static scc_ast_stmt_t *parse_compound_statement(scc_parser_t *parser) {
             ret = (scc_ast_node_t *)scc_parse_statement(parser);
         }
         if (ret == null) {
-            LOG_ERROR("Invalid statement");
+            SCC_ERROR(scc_parser_got_current_pos(parser), "Invalid statement");
             // TODO free
             parser->errcode = 1;
             return null;
@@ -217,7 +227,8 @@ static scc_ast_stmt_t *parse_do_while_statement(scc_parser_t *parser) {
     scc_ast_stmt_t *statement = scc_parse_statement(parser);
 
     if (!scc_parser_consume_if(parser, SCC_TOK_WHILE)) {
-        LOG_ERROR("Expected 'while' after do.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected 'while' after do.");
         // TODO 使用更好的错误处理，未来应当采用更好的内存管理器
         scc_free(statement);
         return null;
@@ -240,7 +251,8 @@ static scc_ast_stmt_t *parse_for_statement(scc_parser_t *parser) {
     */
 
     if (!scc_parser_consume_if(parser, SCC_TOK_L_PAREN)) {
-        LOG_ERROR("Expected '(' before like `( expression )` .");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected '(' before like `( expression )` .");
     }
 
     scc_ast_type_t *init = null;
@@ -253,20 +265,23 @@ static scc_ast_stmt_t *parse_for_statement(scc_parser_t *parser) {
     if (init == null) {
         init = (scc_ast_type_t *)scc_parse_expression(parser);
         if (!scc_parser_consume_if(parser, SCC_TOK_SEMICOLON)) {
-            LOG_ERROR("Expected semicolon in for statement.");
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "Expected semicolon in for statement.");
         }
     }
 
     cond = scc_parse_expression(parser);
 
     if (!scc_parser_consume_if(parser, SCC_TOK_SEMICOLON)) {
-        LOG_ERROR("Expected semicolon in for statement.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected semicolon in for statement.");
     }
 
     incr = scc_parse_expression(parser);
 
     if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-        LOG_ERROR("Expected ')' after like `( expression )` .");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected ')' after like `( expression )` .");
     }
 
     body = scc_parse_statement(parser);
@@ -284,7 +299,8 @@ static scc_ast_stmt_t *parse_jump_statement(scc_parser_t *parser) {
         if (scc_parser_next_consume(parser, &tok)) {
             scc_ast_stmt_goto_init(stmt, scc_cstring_as_cstr(&tok.lexeme));
         } else {
-            LOG_ERROR("Expected label after goto.");
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "Expected label after goto.");
         }
     } else if (scc_parser_consume_if(parser, SCC_TOK_CONTINUE)) {
         scc_ast_stmt_continue_init(stmt);
@@ -297,7 +313,8 @@ static scc_ast_stmt_t *parse_jump_statement(scc_parser_t *parser) {
     }
 
     if (!scc_parser_consume_if(parser, SCC_TOK_SEMICOLON)) {
-        LOG_ERROR("Expected semicolon after jump statement.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected semicolon after jump statement.");
     }
     return stmt;
 }
@@ -319,7 +336,8 @@ static scc_ast_stmt_t *parse_expression_statement(scc_parser_t *parser) {
     scc_ast_stmt_expr_init(stmt, expr);
 
     if (!scc_parser_consume_if(parser, SCC_TOK_SEMICOLON)) {
-        LOG_ERROR("Expected semicolon after expression.");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Expected semicolon after expression.");
     }
     return stmt;
 }

libs/parser/src/parse_type.c

@@ -212,15 +212,10 @@ cbool scc_parse_is_decl_specifier_start(scc_parser_t *parser) {
     // 函数说明符
     case SCC_TOK_INLINE:
         return true;
-
-    // typedef 名称（标识符也可能是类型说明符）
+    // typedef 名称(标识符也可能是类型说明符)
     case SCC_TOK_IDENT:
-        // 需要检查标识符是否在符号表中定义为 typedef
-        // 这里简化处理：假设所有标识符都可能是 typedef
-        // 在实际解析器中，需要查询符号表
-        // TODO
-        return false;
-
+        return scc_parse_got_type(
+                   parser, scc_cstring_as_cstr(&tok_ptr->lexeme)) != null;
     default:
         return false;
     }
@@ -250,7 +245,8 @@ cbool scc_parse_is_type_specifier_start(scc_parser_t *parser) {
     // typedef 名称
     case SCC_TOK_IDENT:
         // 需要检查标识符是否在符号表中定义为 typedef
-        return true;
+        return scc_parse_got_type(
+                   parser, scc_cstring_as_cstr(&tok_ptr->lexeme)) != null;
     default:
         return false;
     }
@@ -346,50 +342,59 @@ typedef struct {
     scc_ast_type_t *user_type; // 如果是用户定义类型，直接存储解析结果
 } type_spec_info_t;
 
-static cbool check_type_combinations(type_spec_info_t *info) {
+static cbool check_type_combinations(scc_parser_t *parser,
+                                     type_spec_info_t *info) {
     // 基本类型不能同时出现多个（void, char, int, float, double, bool 互斥）
     int basic_count = info->is_void + info->is_char + info->is_short +
                       info->is_int + info->is_float + info->is_double +
                       info->is_bool;
     if (basic_count > 1) {
-        LOG_ERROR("Multiple basic type specifiers");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "Multiple basic type specifiers");
         return false;
     }
 
     // long 不能与 void/char/float/bool 组合（但可以和 double 组合为 long
     // double）
     if (info->is_long && info->is_float) {
-        LOG_ERROR("'long' and 'float' cannot be combined");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'long' and 'float' cannot be combined");
         return false;
     }
     if (info->is_long && info->is_char) {
-        LOG_ERROR("'long' and 'char' cannot be combined");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'long' and 'char' cannot be combined");
         return false;
     }
     if (info->is_long && info->is_bool) {
-        LOG_ERROR("'long' and 'bool' cannot be combined");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'long' and 'bool' cannot be combined");
         return false;
     }
     // long 与 double 可以组合为 long double
     if (info->is_long_long && info->is_double) {
-        LOG_ERROR("'long long' and 'double' cannot be combined");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'long long' and 'double' cannot be combined");
         return false;
     }
     // short 只能与 int 组合（默认 int），不能与 double/float 等
     if (info->is_short &&
         (info->is_double || info->is_float || info->is_bool || info->is_void)) {
-        LOG_ERROR("'short' cannot be combined with this type");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'short' cannot be combined with this type");
         return false;
     }
     // _Complex 只能与 float/double/long double 组合（或单独出现？C99 中
     // _Complex 本身不是类型，必须跟浮点类型）
     if (info->is_complex && !info->is_float && !info->is_double) {
-        LOG_ERROR("'complex' must be combined with a floating type");
+        SCC_ERROR(scc_parser_got_current_pos(parser),
+                  "'complex' must be combined with a floating type");
         return false;
     }
     // 如果用户定义了类型（struct/typedef），不能与任何其他类型说明符混合
     if (info->user_type != null && basic_count > 0) {
-        LOG_ERROR(
+        SCC_ERROR(
+            scc_parser_got_current_pos(parser),
             "Cannot combine user-defined type with basic type specifiers");
         return false;
     }
@@ -511,7 +516,8 @@ static scc_ast_type_t *parse_record_type(scc_parser_t *parser,
         while (1) {
             tok_ptr = scc_parser_peek(parser);
             if (tok_ptr == null) {
-                LOG_ERROR("Unexpected EOF in enum specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Unexpected EOF in enum specifier");
                 break;
             }
 
@@ -532,7 +538,8 @@ static scc_ast_type_t *parse_record_type(scc_parser_t *parser,
                 scc_parser_next_consume(parser, null);
                 break;
             } else {
-                LOG_ERROR("Unexpected token in enum specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Unexpected token in enum specifier");
                 scc_parser_next_consume(parser, null);
                 break;
             }
@@ -545,6 +552,7 @@ static scc_ast_type_t *parse_record_type(scc_parser_t *parser,
         } else {
             scc_ast_decl_union_init(decl, name, &member);
         }
+        scc_parse_decl_sema(parser, decl);
     }
 
     scc_ast_type_t *type = ast_type_alloc();
@@ -568,7 +576,7 @@ static scc_ast_type_t *parse_enum_type(scc_parser_t *parser) {
             enumeration-constant = constant-expression
     */
     if (!scc_parser_consume_if(parser, SCC_TOK_ENUM)) {
-        LOG_ERROR("Expected 'enum'");
+        SCC_ERROR(scc_parser_got_current_pos(parser), "Expected 'enum'");
         return null;
     }
     const scc_lexer_tok_t *tok_ptr = scc_parser_peek(parser);
@@ -589,11 +597,12 @@ static scc_ast_type_t *parse_enum_type(scc_parser_t *parser) {
         while (1) {
             tok_ptr = scc_parser_peek(parser);
             if (tok_ptr == null) {
-                LOG_ERROR("Unexpected EOF in enum specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Unexpected EOF in enum specifier");
                 break;
             }
 
-            scc_ast_expr_t *expr = scc_parse_expression(parser);
+            scc_ast_expr_t *expr = scc_parse_assignment_expression(parser);
             if (expr != null) {
                 scc_vec_push(member, expr);
                 continue;
@@ -606,7 +615,8 @@ static scc_ast_type_t *parse_enum_type(scc_parser_t *parser) {
                 scc_parser_next_consume(parser, null);
                 break;
             } else {
-                LOG_ERROR("Unexpected token in enum specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Unexpected token in enum specifier");
                 scc_parser_next_consume(parser, null);
                 break;
             }
@@ -614,6 +624,7 @@ static scc_ast_type_t *parse_enum_type(scc_parser_t *parser) {
         decl = scc_malloc(sizeof(scc_ast_decl_t));
         Assert(decl != null);
         scc_ast_decl_enum_init(decl, name, &member);
+        scc_parse_decl_sema(parser, decl);
     }
 
     scc_ast_type_t *type = ast_type_alloc();
@@ -625,8 +636,36 @@ static scc_ast_type_t *parse_type_specifier(scc_parser_t *parser) {
     type_spec_info_t info = {0};
     if (!scc_parse_is_type_specifier_start(parser))
         return null;
+    const scc_lexer_tok_t *tok_ptr = null;
+    tok_ptr = scc_parser_peek(parser);
+
+    switch (tok_ptr->type) {
+    case SCC_TOK_STRUCT:
+    case SCC_TOK_UNION:
+        info.user_type = parse_record_type(
+            parser, tok_ptr->type == SCC_TOK_STRUCT ? SCC_AST_TYPE_STRUCT
+                                                    : SCC_AST_TYPE_UNION);
+        goto done;
+    case SCC_TOK_ENUM:
+        info.user_type = parse_enum_type(parser);
+        goto done;
+    case SCC_TOK_IDENT:
+        info.user_type =
+            scc_parse_got_type(parser, scc_cstring_as_cstr(&tok_ptr->lexeme));
+        if (info.user_type == null) {
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "Expected type specifier %s",
+                      scc_cstring_as_cstr(&tok_ptr->lexeme));
+        }
+        scc_parser_next_consume(parser, null);
+        Assert(info.user_type != null);
+        goto done;
+    default:
+        break;
+    }
+
     while (1) {
-        const scc_lexer_tok_t *tok_ptr = scc_parser_peek(parser);
+        tok_ptr = scc_parser_peek(parser);
         if (tok_ptr == null) {
             break;
         }
@@ -658,7 +697,8 @@ static scc_ast_type_t *parse_type_specifier(scc_parser_t *parser) {
         case SCC_TOK_LONG:
             // long 可以出现两次
             if (info.is_long_long) {
-                LOG_ERROR("Three 'long's in type specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Three 'long's in type specifier");
                 return null;
             }
             if (info.is_long) {
@@ -689,7 +729,8 @@ static scc_ast_type_t *parse_type_specifier(scc_parser_t *parser) {
             break;
         case SCC_TOK_SIGNED:
             if (info.is_unsigned || info.is_signed) {
-                LOG_ERROR("Both 'signed' and 'unsigned' in type specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Both 'signed' and 'unsigned' in type specifier");
                 return null;
             }
             info.is_signed = true;
@@ -697,7 +738,8 @@ static scc_ast_type_t *parse_type_specifier(scc_parser_t *parser) {
             break;
         case SCC_TOK_UNSIGNED:
             if (info.is_unsigned || info.is_signed) {
-                LOG_ERROR("Both 'signed' and 'unsigned' in type specifier");
+                SCC_ERROR(scc_parser_got_current_pos(parser),
+                          "Both 'signed' and 'unsigned' in type specifier");
                 return null;
             }
             info.is_unsigned = true;
@@ -709,41 +751,28 @@ static scc_ast_type_t *parse_type_specifier(scc_parser_t *parser) {
             info.is_complex = true;
             scc_parser_next_consume(parser, null);
             break;
-        case SCC_TOK_STRUCT:
-        case SCC_TOK_UNION:
-            info.user_type = parse_record_type(
-                parser, tok_ptr->type == SCC_TOK_STRUCT ? SCC_AST_TYPE_STRUCT
-                                                        : SCC_AST_TYPE_UNION);
-            goto done;
-        case SCC_TOK_ENUM:
-            info.user_type = parse_enum_type(parser);
-            goto done;
-        case SCC_TOK_IDENT:
-            // // 处理 typedef 名称：查符号表获取类型节点
-            // info.user_type = parse_typedef_name(parser);
-            // if (!info.user_type)
-            //     return null;
-            goto done;
         default:
             goto done;
         }
     }
 done:
-    if (!check_type_combinations(&info)) {
+    if (!check_type_combinations(parser, &info)) {
         return null;
     }
     return build_type_from_info(&info);
 duplicate_error:
-    LOG_ERROR("Duplicate type specifier");
+    SCC_ERROR(scc_parser_got_current_pos(parser), "Duplicate type specifier");
     return null;
 }
 
-static scc_ast_node_t *parse_declarator(scc_parser_t *parser,
+static scc_ast_type_t *parse_declarator(scc_parser_t *parser,
                                         scc_ast_type_t *base,
-                                        scc_ast_type_t **delay_pointee_ptr);
-static scc_ast_node_t *
+                                        scc_ast_type_t **delay_pointee_ptr,
+                                        scc_lexer_tok_t *tok_ident);
+static scc_ast_type_t *
 parse_direct_declarator(scc_parser_t *parser, scc_ast_type_t *base,
-                        scc_ast_type_t **delay_pointee_ptr);
+                        scc_ast_type_t **delay_pointee_ptr,
+                        scc_lexer_tok_t *tok_ident);
 static scc_ast_type_t *
 parse_abstract_declarator(scc_parser_t *parser, scc_ast_type_t *base,
                           scc_ast_type_t **delay_pointee_ptr);
@@ -793,18 +822,15 @@ static void parse_parameter_type_list(scc_parser_t *parser,
     scc_ast_decl_t *param = null;
     while (1) {
         // FIXME
-        scc_ast_decl_specifier_t spec = parse_type_qualifier_list(parser);
-        scc_ast_type_t *type = parse_type_specifier(parser);
-        if (type == null) {
-            break;
+        scc_ast_node_t *node = _scc_parse_type(parser);
+        if (node == null) {
+            return;
         }
-        type->quals = spec;
-
-        scc_ast_node_t *node = parse_declarator(parser, type, null);
 
         if (SCC_AST_IS_A(scc_ast_decl_t, node)) {
             param = SCC_AST_CAST_TO(scc_ast_decl_t, node);
             // TODO Check validation
+            Assert(param->base.type = SCC_AST_DECL_VAR);
             param->base.type = SCC_AST_DECL_PARAM;
         } else if (SCC_AST_IS_A(scc_ast_type_t, node)) {
             param = scc_malloc(sizeof(scc_ast_decl_t));
@@ -828,23 +854,37 @@ static void parse_parameter_type_list(scc_parser_t *parser,
     }
 }
 
+static inline cbool parse_function_parameters_start(scc_parser_t *parser) {
+    const scc_lexer_tok_t *tok_ptr = scc_parser_peek(parser);
+    if (tok_ptr == null) {
+        return false;
+    }
+    if (scc_parse_is_decl_specifier_start(parser)) {
+        return true;
+    }
+    if (tok_ptr->type == SCC_TOK_R_PAREN) {
+        return true;
+    }
+    return false;
+}
+
 static void parse_function_parameters(scc_parser_t *parser,
                                       scc_ast_decl_vec_t *params) {
     // FIXME ?
     // if (!scc_parser_consume_if(parser, SCC_TOK_L_PAREN)) {
-    //     LOG_ERROR("Expect '('");
+    //     SCC_ERROR(scc_parser_got_current_pos(parser),"Expect '('");
     // }
     scc_vec_init(*params);
     parse_parameter_type_list(parser, params);
     if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-        LOG_ERROR("expect ')'");
+        SCC_ERROR(scc_parser_got_current_pos(parser), "expect ')'");
     }
 }
 
 static scc_ast_expr_t *parse_array_size_type(scc_parser_t *parser) {
     const scc_lexer_tok_t *tok_ptr = null;
     if (!scc_parser_consume_if(parser, SCC_TOK_L_BRACKET)) {
-        LOG_ERROR("Expect '['");
+        SCC_ERROR(scc_parser_got_current_pos(parser), "Expect '['");
         parser->errcode = 1;
         return null;
     }
@@ -874,16 +914,17 @@ static scc_ast_expr_t *parse_array_size_type(scc_parser_t *parser) {
         }
     }
     if (!scc_parser_consume_if(parser, SCC_TOK_R_BRACKET)) {
-        LOG_ERROR("expect ']'");
+        SCC_ERROR(scc_parser_got_current_pos(parser), "expect ']'");
         parser->errcode = 1;
         return null;
     }
     return size;
 }
 
-static scc_ast_node_t *parse_declarator(scc_parser_t *parser,
+static scc_ast_type_t *parse_declarator(scc_parser_t *parser,
                                         scc_ast_type_t *base,
-                                        scc_ast_type_t **delay_pointee_ptr) {
+                                        scc_ast_type_t **delay_pointee_ptr,
+                                        scc_lexer_tok_t *tok_ident) {
     /*
     (6.7.5) declarator:
         pointer(opt) direct-declarator
@@ -901,72 +942,66 @@ static scc_ast_node_t *parse_declarator(scc_parser_t *parser,
         direct-declarator ( identifier-list(opt) )
     */
     scc_ast_type_t *ret = parse_pointer(parser, base, delay_pointee_ptr);
-    return parse_direct_declarator(parser, ret, delay_pointee_ptr);
+    return parse_direct_declarator(parser, ret, delay_pointee_ptr, tok_ident);
 }
 
-static scc_ast_node_t *
+static scc_ast_type_t *
 parse_direct_declarator(scc_parser_t *parser, scc_ast_type_t *base,
-                        scc_ast_type_t **delay_pointee_ptr) {
+                        scc_ast_type_t **delay_pointee_ptr,
+                        scc_lexer_tok_t *tok_ident) {
     const scc_lexer_tok_t *tok_ptr = null;
     scc_ast_type_t *ret = null;
     // direct-abstract-declarator
     tok_ptr = scc_parser_peek(parser);
     if (tok_ptr == null) {
-        return (scc_ast_node_t *)base;
+        return base;
     }
 
     if (tok_ptr->type == SCC_TOK_IDENT) {
-        scc_lexer_tok_t tok = {0};
-        scc_parser_next_consume(parser, &tok);
-
-        scc_ast_node_t *type =
-            parse_direct_declarator(parser, base, delay_pointee_ptr);
-        Assert(SCC_AST_IS_A(scc_ast_type_t, type));
-        scc_ast_decl_t *decl = scc_malloc(sizeof(scc_ast_decl_t));
-        Assert(decl != null);
-
-        if (type->type == SCC_AST_TYPE_FUNCTION) {
-            scc_ast_decl_func_init(decl, SCC_AST_CAST_TO(scc_ast_type_t, type),
-                                   scc_cstring_as_cstr(&tok.lexeme), null);
-        } else {
-            scc_ast_decl_val_init(decl, SCC_AST_CAST_TO(scc_ast_type_t, type),
-                                  scc_cstring_as_cstr(&tok.lexeme), null);
+        Assert(tok_ident != null);
+        if (tok_ident->type != SCC_TOK_UNKNOWN) {
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "Got double identifier in declarator");
+            return base;
         }
-        return (scc_ast_node_t *)decl;
+        scc_parser_next_consume(parser, tok_ident);
+
+        return parse_direct_declarator(parser, base, delay_pointee_ptr,
+                                       tok_ident);
     } else if (tok_ptr->type == SCC_TOK_L_PAREN) {
         // () SCC_TOK_L_PAREN
         scc_parser_next_consume(parser, null);
         scc_ast_type_t *delay_pointee = null;
-        ret = parse_abstract_declarator(parser, null, &delay_pointee);
-        if (ret == null) {
+        if (parse_function_parameters_start(parser)) {
             scc_ast_decl_vec_t params;
             parse_function_parameters(parser, &params);
             ret = ast_type_alloc();
             scc_ast_type_function_init(ret, base, &params);
-            return (scc_ast_node_t *)parse_direct_declarator(parser, ret,
-                                                             delay_pointee_ptr);
+            return parse_direct_declarator(parser, ret, delay_pointee_ptr,
+                                           tok_ident);
         } else {
+            ret = parse_declarator(parser, null, &delay_pointee, tok_ident);
+            Assert(ret != null);
             if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-                LOG_ERROR("expect ')'");
+                SCC_ERROR(scc_parser_got_current_pos(parser), "expect ')'");
             }
-            base = (scc_ast_type_t *)parse_direct_declarator(parser, base,
-                                                             delay_pointee_ptr);
+            base = parse_direct_declarator(parser, base, delay_pointee_ptr,
+                                           tok_ident);
             Assert(SCC_AST_IS_A(scc_ast_type_t, base));
             Assert(delay_pointee != null);
             delay_pointee->pointer.pointee = base;
+            return ret;
         }
-        return (scc_ast_node_t *)ret;
     } else if (tok_ptr->type == SCC_TOK_L_BRACKET) {
         // [] SCC_TOK_L_BRACKET
         scc_ast_expr_t *size = parse_array_size_type(parser);
         scc_ast_type_t *ret = ast_type_alloc();
-        base = (scc_ast_type_t *)parse_direct_declarator(parser, base,
-                                                         delay_pointee_ptr);
-        Assert(SCC_AST_IS_A(scc_ast_type_t, base));
+        base =
+            parse_direct_declarator(parser, base, delay_pointee_ptr, tok_ident);
         scc_ast_type_array_init(ret, base, size);
-        return (scc_ast_node_t *)ret;
+        return ret;
     } else {
-        return (scc_ast_node_t *)base;
+        return base;
     }
 }
 
@@ -1008,8 +1043,7 @@ parse_direct_abstract_declarator(scc_parser_t *parser, scc_ast_type_t *base,
         // () SCC_TOK_L_PAREN
         scc_parser_next_consume(parser, null);
         scc_ast_type_t *delay_pointee = null;
-        ret = parse_abstract_declarator(parser, null, &delay_pointee);
-        if (ret == null) {
+        if (parse_function_parameters_start(parser)) {
             scc_ast_decl_vec_t params;
             parse_function_parameters(parser, &params);
             ret = ast_type_alloc();
@@ -1017,8 +1051,10 @@ parse_direct_abstract_declarator(scc_parser_t *parser, scc_ast_type_t *base,
             return parse_direct_abstract_declarator(parser, ret,
                                                     delay_pointee_ptr);
         } else {
+            ret = parse_abstract_declarator(parser, null, &delay_pointee);
+            Assert(ret != null);
             if (!scc_parser_consume_if(parser, SCC_TOK_R_PAREN)) {
-                LOG_ERROR("expect ')'");
+                SCC_ERROR(scc_parser_got_current_pos(parser), "expect ')'");
             }
             base = parse_direct_abstract_declarator(parser, base,
                                                     delay_pointee_ptr);
@@ -1055,12 +1091,33 @@ scc_ast_node_t *_scc_parse_type(scc_parser_t *parser) {
     if (ret != null) {
         ret->quals = spec;
     }
-    scc_ast_node_t *node = parse_declarator(parser, ret, null);
-    if (is_typedef_decl) {
-        Assert(node->type == SCC_AST_DECL_VAR);
-        node->type = SCC_AST_DECL_TYPEDEF;
+
+    scc_lexer_tok_t tok_ident = {0};
+    scc_ast_type_t *type = parse_declarator(parser, ret, null, &tok_ident);
+
+    scc_ast_decl_t *decl = null;
+    if (tok_ident.type == SCC_TOK_IDENT) {
+        decl = scc_malloc(sizeof(scc_ast_decl_t));
+        Assert(decl != null);
     }
-    return node;
+    const char *name = decl ? scc_cstring_as_cstr(&tok_ident.lexeme) : null;
+    if (is_typedef_decl) {
+        if (decl == null) {
+            SCC_ERROR(scc_parser_got_current_pos(parser),
+                      "typedef don't have a ident");
+            parser->errcode = 1;
+        } else {
+            scc_ast_decl_typedef_init(decl, name, type);
+        }
+    } else if (decl) {
+        if (type->base.type == SCC_AST_TYPE_FUNCTION) {
+            scc_ast_decl_func_init(decl, type, name, null);
+        } else {
+            scc_ast_decl_val_init(decl, type, name, null);
+        }
+    }
+
+    return decl != null ? &decl->base : &type->base;
 }
 
 scc_ast_type_t *scc_parse_type_name(scc_parser_t *parser) {

libs/parser/src/scc_parser.c

@@ -1,5 +1,6 @@
 #include <parser_utils.h>
 #include <scc_parser.h>
+
 static void dummy_sema_callback(void *context, scc_ast_node_type_t node_type,
                                 void *node) {
     (void)context;
@@ -70,9 +71,10 @@ scc_ast_translation_unit_t *scc_parse_translation_unit(scc_parser_t *parser) {
             scc_vec_push(unit->declarations, decl);
         } else {
             break;
-            // MAYBE return or next
         }
         if (parser->errcode != 0) { // FIXME errcode
+            SCC_ERROR(scc_parser_got_current_pos(parser), "parser error: %d",
+                      parser->errcode);
             break;
         }
         const scc_lexer_tok_t *tok = scc_parser_peek(parser);
@@ -83,6 +85,8 @@ scc_ast_translation_unit_t *scc_parse_translation_unit(scc_parser_t *parser) {
 
     if (parser->errcode) {
         // TODO: 清理
+        SCC_ERROR(scc_parser_got_current_pos(parser), "parser error: %d",
+                  parser->errcode);
         scc_free(unit);
         return null;
     }

libs/parser/src/scc_sema.c

@@ -1,6 +1,55 @@
 #include <scc_sema.h>
 #include <sema_symtab.h>
 
+static void type_callback(void *context, scc_ast_node_type_t node_type,
+                          void *node) {
+    scc_sema_symtab_t *sema_symtab = context;
+    (void)context;
+    (void)node_type;
+    (void)node;
+    return;
+}
+
+static void decl_callback(void *context, scc_ast_node_type_t node_type,
+                          void *node) {
+    if (node_type == SCC_AST_UNKNOWN || node == null) {
+        return;
+    }
+    scc_sema_symtab_t *sema_symtab = context;
+    scc_ast_decl_t *decl = SCC_AST_CAST_TO(scc_ast_decl_t, node);
+
+    scc_ast_type_t *type = scc_malloc(sizeof(scc_ast_type_t));
+    Assert(type != null);
+    if (decl->name == null) {
+        return;
+    }
+    if (decl->base.type == SCC_AST_DECL_STRUCT) {
+        scc_ast_type_struct_init(type, decl->name, decl);
+        scc_sema_symtab_add_symbol(sema_symtab, decl->name, &type->base);
+    } else if (decl->base.type == SCC_AST_DECL_UNION) {
+        scc_ast_type_union_init(type, decl->name, decl);
+        scc_sema_symtab_add_symbol(sema_symtab, decl->name, &type->base);
+    } else if (decl->base.type == SCC_AST_DECL_ENUM) {
+        scc_ast_type_enum_init(type, decl->name, decl);
+        scc_sema_symtab_add_symbol(sema_symtab, decl->name, &type->base);
+    } else if (decl->base.type == SCC_AST_DECL_TYPEDEF) {
+        scc_ast_type_typedef_init(type, decl->name, decl);
+        scc_sema_symtab_add_symbol(sema_symtab, decl->name, &type->base);
+    }
+    return;
+}
+
+static scc_ast_type_t *got_type_callback(void *context, const char *name) {
+    scc_sema_symtab_t *sema_symtab = context;
+    scc_ast_node_t *node = scc_sema_symtab_lookup_symbol(sema_symtab, name);
+    if (SCC_AST_IS_A(scc_ast_type_t, node)) {
+        scc_ast_type_t *type = scc_malloc(sizeof(scc_ast_type_t));
+        *type = *(scc_ast_type_t *)node;
+        return type;
+    }
+    return null;
+}
+
 void scc_sema_init(scc_sema_callbacks_t *callbacks) {
     scc_sema_symtab_t *sema_symtab = scc_malloc(sizeof(scc_sema_symtab_t));
     if (sema_symtab == null) {
@@ -8,11 +57,19 @@ void scc_sema_init(scc_sema_callbacks_t *callbacks) {
         return;
     }
     callbacks->context = sema_symtab;
-    callbacks->on_decl = null;
+    callbacks->on_decl = decl_callback;
     callbacks->on_expr = null;
     callbacks->on_stmt = null;
-    callbacks->on_type = null;
-    callbacks->got_type = null;
+    callbacks->on_type = type_callback;
+    callbacks->got_type = got_type_callback;
+
+    scc_sema_symtab_init(sema_symtab);
+    scc_sema_symtab_add_symbol(sema_symtab, "__scc_builtin_va_list",
+                               &scc_ast_builtin_type_va_list.base);
+    scc_sema_symtab_add_symbol(sema_symtab, "__scc_builtin_size_t",
+                               &scc_ast_builtin_type_long_long.base);
+    scc_sema_symtab_add_symbol(sema_symtab, "__scc_builtin_ptrdiff_t",
+                               &scc_ast_builtin_type_long_long.base);
 }
 
 void scc_sema_drop(scc_sema_callbacks_t *callbacks) {}

libs/parser/src/sema_symtab.c

@@ -4,8 +4,8 @@ void scc_sema_symtab_init(scc_sema_symtab_t *symtab) {
     symtab->root_scope.parent = null;
 
     scc_hashtable_init(&symtab->root_scope.symbols,
-                       (scc_hashtable_hash_func_t)scc_strcmp,
-                       (scc_hashtable_equal_func_t)scc_strhash32);
+                       (scc_hashtable_hash_func_t)scc_strhash32,
+                       (scc_hashtable_equal_func_t)scc_strcmp);
     symtab->current_scope = &symtab->root_scope;
 }
 

libs/parser/tests/test_parser_unit.c

@@ -7,7 +7,8 @@
 typedef scc_ast_node_t *(*scc_parse_node_func)(scc_parser_t *parser);
 
 static scc_ast_node_t *process_input(const char *input,
-                                     scc_parse_node_func parse_func) {
+                                     scc_parse_node_func parse_func,
+                                     cbool need_sema) {
     int res = 0;
     scc_sstream_t mem_stream;
     res = scc_sstream_init_by_buffer(&mem_stream, input, strlen(input), false,
@@ -20,7 +21,13 @@ static scc_ast_node_t *process_input(const char *input,
     scc_lexer_tok_ring_t *tok_ring = scc_lexer_to_ring(&lexer, 64, false);
 
     scc_parser_t parser;
-    scc_parser_init(&parser, tok_ring, null);
+    if (need_sema) {
+        scc_sema_callbacks_t sema_callbacks;
+        scc_sema_init(&sema_callbacks);
+        scc_parser_init(&parser, tok_ring, &sema_callbacks);
+    } else {
+        scc_parser_init(&parser, tok_ring, null);
+    }
 
     scc_ast_node_t *ret = parse_func(&parser);
 
@@ -55,8 +62,8 @@ static void dump2buffer(void *_buffer, const char *fmt, ...) {
 }
 
 static void _scc_check_ast(scc_ast_node_t *expect_node_ptr, const char *str,
-                           scc_parse_node_func parse_func) {
-    scc_ast_node_t *output_node_ptr = process_input(str, parse_func);
+                           scc_parse_node_func parse_func, cbool need_sema) {
+    scc_ast_node_t *output_node_ptr = process_input(str, parse_func, need_sema);
     scc_tree_dump_ctx_t ctx;
     expect_buffer[0] = '\n', expect_buffer[1] = '\0';
     scc_tree_dump_ctx_init(&ctx, true, dump2buffer, expect_buffer);
@@ -68,9 +75,19 @@ static void _scc_check_ast(scc_ast_node_t *expect_node_ptr, const char *str,
     scc_tree_dump_ctx_drop(&ctx);
 }
 
+#define SCC_CHECK_AST_WITH_SEMA(expect_node_ptr, str, parse_func)              \
+    do {                                                                       \
+        _scc_check_ast(expect_node_ptr, str, (scc_parse_node_func)parse_func,  \
+                       true);                                                  \
+        TEST_CHECK(strcmp(output_buffer, expect_buffer) == 0);                 \
+        TEST_MSG("Expected: %s", expect_buffer);                               \
+        TEST_MSG("Produced: %s", output_buffer);                               \
+    } while (0);
+
 #define SCC_CHECK_AST(expect_node_ptr, str, parse_func)                        \
     do {                                                                       \
-        _scc_check_ast(expect_node_ptr, str, (scc_parse_node_func)parse_func); \
+        _scc_check_ast(expect_node_ptr, str, (scc_parse_node_func)parse_func,  \
+                       false);                                                 \
         TEST_CHECK(strcmp(output_buffer, expect_buffer) == 0);                 \
         TEST_MSG("Expected: %s", expect_buffer);                               \
         TEST_MSG("Produced: %s", output_buffer);                               \
@@ -370,8 +387,38 @@ static void test_parser_unit(void) {
         scc_ast_decl_t typedef_decl;
         scc_ast_decl_typedef_init(&typedef_decl, "int32_t",
                                   &scc_ast_builtin_type_int);
-        SCC_CHECK_AST(&typedef_decl.base, "typedef int int32_t;",
-                      scc_parse_declaration);
+        scc_ast_type_t typedef_type;
+        scc_ast_type_typedef_init(&typedef_type, "int32_t", &typedef_decl);
+
+        scc_ast_decl_t i32a_decl;
+        scc_ast_decl_val_init(&i32a_decl, &typedef_type, "a", null);
+
+        scc_ast_node_t *array[] = {&typedef_decl.base, &i32a_decl.base};
+        scc_ast_stmt_t stmt;
+        scc_ast_block_item_vec_t items;
+        scc_vec_unsafe_from_array(items, array);
+        scc_ast_stmt_compound_init(&stmt, &items);
+        SCC_CHECK_AST_WITH_SEMA(&stmt.base, "{typedef int int32_t;int32_t a;}",
+                                scc_parse_statement);
+
+        scc_ast_type_t void_ptr;
+        scc_ast_type_pointer_init(&void_ptr, &scc_ast_builtin_type_void);
+        scc_ast_decl_t void_ptr_decl;
+        scc_ast_decl_typedef_init(&void_ptr_decl, "void_ptr", &void_ptr);
+        scc_ast_type_t void_ptr_type;
+        scc_ast_type_typedef_init(&void_ptr_type, "void_ptr", &void_ptr_decl);
+
+        scc_ast_decl_t void_ptr_a_decl;
+        scc_ast_decl_val_init(&void_ptr_a_decl, &void_ptr_type, "a", null);
+
+        scc_ast_node_t *array2[] = {&void_ptr_decl.base, &void_ptr_a_decl.base};
+        scc_vec_unsafe_from_array(items, array2);
+        scc_ast_stmt_compound_init(&stmt, &items);
+        SCC_CHECK_AST_WITH_SEMA(&stmt.base,
+                                "{typedef void* void_ptr; void_ptr a;}",
+                                scc_parse_statement);
+        SCC_CHECK_AST_WITH_SEMA(&void_ptr_decl.base, "typedef void *void_ptr;",
+                                scc_parse_declaration);
     }
 
     {
@@ -387,6 +434,145 @@ static void test_parser_unit(void) {
         scc_ast_decl_struct_init(&struct_def, null, &fields);
         SCC_CHECK_AST(&struct_def.base, "struct { int x; };",
                       scc_parse_declaration);
+
+        scc_ast_type_t struct_type;
+        scc_ast_type_struct_init(&struct_type, null, &struct_def);
+        scc_ast_type_t typedef_type;
+        scc_ast_type_typedef_init(&typedef_type, "struct_t", &struct_def);
+        scc_ast_decl_t typedef_decl;
+        scc_ast_decl_typedef_init(&typedef_decl, "struct_t", &struct_type);
+        SCC_CHECK_AST_WITH_SEMA(&typedef_decl.base,
+                                "typedef struct { int x; } struct_t;",
+                                scc_parse_declaration);
+
+        scc_ast_decl_t typedef_impl_decl;
+        scc_ast_decl_val_init(&typedef_impl_decl, &typedef_type, "a", null);
+        scc_ast_node_t *array[] = {&typedef_decl.base, &typedef_impl_decl.base};
+        scc_ast_stmt_t stmt;
+        scc_ast_block_item_vec_t items;
+        scc_vec_unsafe_from_array(items, array);
+        scc_ast_stmt_compound_init(&stmt, &items);
+        SCC_CHECK_AST_WITH_SEMA(
+            &stmt.base, "{typedef struct { int x; } struct_t; struct_t a;}",
+            scc_parse_statement);
+    }
+
+    {
+        scc_ast_decl_t type_decl;
+        scc_ast_decl_typedef_init(&type_decl, "size_t",
+                                  &scc_ast_builtin_type_long_long);
+        scc_ast_type_t type_type;
+        scc_ast_type_typedef_init(&type_type, "size_t", &type_decl);
+
+        scc_ast_decl_t param1;
+        scc_ast_decl_param_init(&param1, &type_type, "a");
+        scc_ast_decl_t param2;
+        scc_ast_decl_param_init(&param2, &scc_ast_builtin_type_int, "b");
+        scc_ast_decl_t param3;
+        scc_ast_decl_param_init(&param3, &scc_ast_builtin_type_va_list, null);
+        scc_ast_decl_t *params_array[] = {&param1, &param2, &param3};
+        scc_ast_decl_vec_t func_params;
+        scc_vec_unsafe_from_array(func_params, params_array);
+        scc_ast_type_t func_type;
+
+        scc_ast_type_t return_type;
+
+        scc_ast_type_pointer_init(&return_type, &scc_ast_builtin_type_void);
+        scc_ast_type_function_init(&func_type, &return_type, &func_params);
+        scc_ast_decl_t func_decl;
+        scc_ast_decl_func_init(&func_decl, &func_type, "func", null);
+
+        scc_ast_decl_t *decls_array[] = {&type_decl, &func_decl};
+        scc_ast_translation_unit_t tu;
+        scc_ast_decl_vec_t decls;
+        scc_vec_unsafe_from_array(decls, decls_array);
+        scc_ast_translation_unit_init(&tu, &decls);
+        SCC_CHECK_AST_WITH_SEMA(&tu.base,
+                                "typedef long long size_t;"
+                                "void *func(size_t a, int b, ...);",
+                                scc_parse_translation_unit);
+
+        scc_ast_type_t type_func_ptr_type;
+        scc_ast_type_pointer_init(&type_func_ptr_type, &func_type);
+        scc_ast_decl_t type_func_ptr_decl;
+        scc_ast_decl_typedef_init(&type_func_ptr_decl, "func_t",
+                                  &type_func_ptr_type);
+        scc_ast_decl_t *decls_array2[] = {&type_decl, &type_func_ptr_decl};
+        scc_vec_unsafe_from_array(decls, decls_array2);
+        scc_ast_translation_unit_init(&tu, &decls);
+        SCC_CHECK_AST_WITH_SEMA(
+            &tu.base,
+            "typedef long long size_t;"
+            "typedef void *(*func_t)(size_t a, int b, ...);",
+            scc_parse_translation_unit);
+    }
+
+    {
+        // int (*(*)(void))[5]   (指向函数的指针，该函数返回指向数组的指针)
+        // 步骤：
+        // 1) 数组类型：int [5]
+        scc_ast_expr_t size_5;
+        scc_ast_expr_literal_int_init(&size_5, "5", false);
+        scc_ast_type_t array_of_5_int;
+        scc_ast_type_array_init(&array_of_5_int,
+                                (scc_ast_type_t *)&scc_ast_builtin_type_int,
+                                &size_5);
+
+        // 2) 函数类型：返回指向数组的指针，无参数
+        scc_ast_type_t ptr_to_array;
+        scc_ast_type_pointer_init(&ptr_to_array, &array_of_5_int);
+        scc_ast_type_t func_type;
+        scc_ast_decl_vec_t func_params;
+        scc_ast_decl_t void_decl;
+        scc_ast_decl_param_init(&void_decl, &scc_ast_builtin_type_void, null);
+        scc_ast_decl_t *array[] = {&void_decl};
+        scc_vec_unsafe_from_array(func_params, array);
+        scc_ast_type_function_init(&func_type, &ptr_to_array,
+                                   &func_params); // 无参数
+
+        // 3) 指向该函数的指针
+        scc_ast_type_t ptr_to_func;
+        scc_ast_type_pointer_init(&ptr_to_func, &func_type);
+
+        scc_ast_decl_t ptr_to_func_decl;
+        scc_ast_decl_val_init(&ptr_to_func_decl, &ptr_to_func, "foo", null);
+        SCC_CHECK_AST(&ptr_to_func_decl.base, "int (*(*foo)(void))[5];",
+                      scc_parse_declaration);
+
+        scc_ast_decl_t typedef_func_decl;
+        scc_ast_decl_typedef_init(&typedef_func_decl, "func_t", &ptr_to_func);
+        scc_ast_type_t typedef_func_type;
+        scc_ast_type_typedef_init(&typedef_func_type, "func_t",
+                                  &typedef_func_decl);
+        scc_ast_decl_t func_hard_decl;
+        scc_ast_type_t func_hard_type;
+
+        scc_ast_decl_t param1;
+        scc_ast_decl_param_init(&param1, &ptr_to_func, "bar");
+        scc_ast_decl_t param2;
+        scc_ast_decl_param_init(&param2, &typedef_func_type, "a");
+        scc_ast_decl_t param3;
+        scc_ast_decl_param_init(&param1, &scc_ast_builtin_type_va_list, null);
+        scc_ast_decl_t *func_hard_array[] = {&param1, &param2, &param3};
+        scc_ast_decl_vec_t func_hard_params;
+        scc_vec_unsafe_from_array(func_hard_params, func_hard_array);
+        scc_ast_type_function_init(&func_hard_type, &ptr_to_array,
+                                   &func_hard_params);
+        scc_ast_decl_func_init(&func_hard_decl, &func_hard_type, "bar", null);
+
+        scc_ast_decl_vec_t decls;
+        scc_ast_decl_t *decls_array[] = {
+            &typedef_func_decl,
+            &func_hard_decl,
+        };
+        scc_vec_unsafe_from_array(decls, decls_array);
+        scc_ast_translation_unit_t tu;
+        scc_ast_translation_unit_init(&tu, &decls);
+        // SCC_CHECK_AST_WITH_SEMA(
+        //     &tu.base,
+        //     "typedef int (*(*func_t)(void))[5];"
+        //     "int (*(*(bar)(int(*(*foo)(void))[5], func_t a,
+        //     ...))(void))[5];", scc_parse_translation_unit);
     }
 }
 
@@ -513,18 +699,12 @@ static void test_parser_expression(void) {
 
     // 4. 类型转换（示例： (int)x ）
     {
-        // scc_ast_type_t
-        //     int_type; // 使用内置类型全局变量即可，但类型转换需要一个类型节点
-        // //
-        // 我们可以直接使用全局内置类型的地址，但类型转换节点需要一个类型节点，直接引用全局即可
-        // // TODO
-        // scc_ast_expr_t x;
-        // scc_ast_expr_identifier_init(&x, "x");
-        // scc_ast_expr_t cast;
-        // scc_ast_expr_cast_init(&cast,
-        //                        (scc_ast_type_t *)&scc_ast_builtin_type_int,
-        //                        &x);
-        // SCC_CHECK_AST(&cast.base, "(int)x", scc_parse_expression);
+        scc_ast_expr_t x;
+        scc_ast_expr_identifier_init(&x, "x");
+        scc_ast_expr_t cast;
+        scc_ast_expr_cast_init(&cast,
+                               (scc_ast_type_t *)&scc_ast_builtin_type_int, &x);
+        SCC_CHECK_AST(&cast.base, "(int)x", scc_parse_expression);
     }
 
     // 5. 二元运算符优先级
@@ -1168,10 +1348,8 @@ static void test_parser_type(void) {
         scc_ast_expr_identifier_init(&green, "GREEN");
         scc_ast_expr_identifier_init(&blue, "BLUE");
         scc_ast_expr_vec_t enumerators;
-        scc_vec_init(enumerators);
-        scc_vec_push(enumerators, &red);
-        scc_vec_push(enumerators, &green);
-        scc_vec_push(enumerators, &blue);
+        scc_ast_expr_t *array[] = {&red, &green, &blue};
+        scc_vec_unsafe_from_array(enumerators, array);
 
         scc_ast_decl_t enum_def;
         scc_ast_decl_enum_init(&enum_def, null, &enumerators);
@@ -1179,9 +1357,11 @@ static void test_parser_type(void) {
         scc_ast_type_enum_init(&enum_type, null, &enum_def);
         SCC_CHECK_AST(&enum_type.base, "enum { RED, GREEN, BLUE }",
                       _scc_parse_type);
+
+        scc_vec_unsafe_from_array(enumerators, array);
         scc_ast_decl_enum_init(&enum_def, "E", &enumerators);
         scc_ast_type_enum_init(&enum_type, "E", &enum_def);
-        SCC_CHECK_AST(&enum_type.base, "enum E { RED, GREEN, BLUE }",
+        SCC_CHECK_AST(&enum_type.base, "enum E { RED, GREEN, BLUE, }",
                       _scc_parse_type);
     }
 

libs/pproc/src/pproc_directive.c

@@ -90,6 +90,10 @@ static inline void fill_replacements(scc_pproc_t *pp,
         scc_ring_next_consume(*pp->cur_ring, tok, ok);
         if (!ok)
             break;
+        if (scc_get_tok_subtype(tok.type) == SCC_TOK_SUBTYPE_COMMENT) {
+            scc_lexer_tok_drop(&tok);
+            continue;
+        }
         if (tok.type == SCC_TOK_EOF || tok.type == SCC_TOK_ENDLINE) {
             scc_lexer_tok_drop(&tok);
             break;

libs/pproc/src/pproc_macro.c

@@ -96,10 +96,10 @@ cbool scc_pproc_add_function_macro(scc_pproc_macro_table_t *macros,
 
 scc_pproc_macro_t *scc_pproc_macro_table_set(scc_pproc_macro_table_t *pp,
                                              scc_pproc_macro_t *macro) {
-    Assert(pp != null && macro != null);
+    Assert(pp != null && macro != null && scc_cstring_len(&macro->name) != 0);
     scc_pproc_macro_t *old = scc_hashtable_set(&pp->table, &macro->name, macro);
     if (old && old != macro) {
-        LOG_WARN("same macro name");
+        LOG_WARN("same macro name `%s`", scc_cstring_as_cstr(&macro->name));
         scc_pproc_macro_drop(old);
     }
     return macro;

libs/pproc/tests/test_pproc_unit.c

@@ -194,6 +194,11 @@ static void test_define_nested_macros(void) {
     CHECK_PP_OUTPUT_EXACT("#define default a\n"
                           "default\n",
                           "a\n");
+
+    TEST_CASE("test_macro_end_by_comment");
+    CHECK_PP_OUTPUT_EXACT("#define MAX_SIZE 128///! COMMENT\n"
+                          "MAX_SIZE\n",
+                          "128\n");
 }
 
 static void test_undef_macros(void) {