refactor(ast): 统一记录类型结构并移除成员访问操作符

- 移除了枚举类型的独立结构定义，统一使用record结构
- 移除了成员访问操作符SCC_AST_OP_MEMBER_ACCESS和SCC_AST_OP_PTR_MEMBER_ACCESS
- 更新了for循环语句中init字段的类型从scc_ast_type_t*到scc_ast_node_t*
- 修改了声明初始化函数以支持统一的记录类型处理

fix(ast2ir): 完善二元表达式处理和for循环代码生成

- 重构了赋值操作符的处理逻辑，通过临时表达式实现复合赋值
- 添加了对for循环语句的完整IR代码生成功能
- 修复了if-else语句中错误的基本块跳转问题
- 改进了标识符未找到时的错误提示信息

chore: 清理代码和修复潜在问题

- 移除了未使用的自动标签生成功能
- 统一了IR基本块标签格式化输出
- 修复了机器码生成中的寄存器存储控制流问题
- 改进了词法分析器中十六进制数字的处理逻辑

src/config.h

@@ -6,6 +6,7 @@
 typedef struct {
     const char *input_file;
     const char *output_file;
+    const char *target_description;
     int verbose;
     scc_argparse_list_t include_paths;
     scc_argparse_list_t define_macros;
@@ -24,6 +25,7 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
         SCC_HINT_INPUT_FILE,
         SCC_HINT_INCLUDE_PATH,
         SCC_HINT_DEFINED_MACRO,
+        SCC_HINT_TARGET_DESC,
         SCC_HINT_VERBOSE,
 
         SCC_HINT_EMIT_LEX,
@@ -39,6 +41,8 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
         [SCC_HINT_INPUT_FILE] = "Input source file",
         [SCC_HINT_INCLUDE_PATH] = "Add directory to the include search paths",
         [SCC_HINT_DEFINED_MACRO] = "Define a macro",
+        [SCC_HINT_TARGET_DESC] =
+            "Target description(eg. x86_64-pc-windows-msvc)",
         [SCC_HINT_VERBOSE] = "Increase verbosity (can be used multiple times)",
         [SCC_HINT_EMIT_LEX] = "Generate lexer sources tokens and exit",
         [SCC_HINT_EMIT_PP] = "Generate preprocessed tokens and exit",
@@ -52,6 +56,7 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
         [SCC_HINT_INPUT_FILE] = "输入源文件",
         [SCC_HINT_INCLUDE_PATH] = "添加系统头文件到搜索路径",
         [SCC_HINT_DEFINED_MACRO] = "定义宏",
+        [SCC_HINT_TARGET_DESC] = "目标机器描述(eg. x86_64-pc-windows-msvc)",
         [SCC_HINT_VERBOSE] = "增加详细输出(可多次使用)",
         [SCC_HINT_EMIT_LEX] = "生成`源代码的词法单元`并退出",
         [SCC_HINT_EMIT_PP] = "生成`预处理后的词法单元`并退出",
@@ -105,6 +110,14 @@ static void setup_argparse(scc_argparse_t *argparse, scc_config_t *config,
     scc_argparse_spec_setup_list(&opt_define.spec, &(config->define_macros));
     scc_argparse_cmd_add_opt(root, &opt_define);
 
+    // --target
+    scc_argparse_opt_t opt_target;
+    scc_argparse_opt_init(&opt_target, 0, "target",
+                          scc_hints[SCC_HINT_TARGET_DESC]);
+    scc_argparse_spec_setup_string(&opt_target.spec,
+                                   &(config->target_description));
+    scc_argparse_cmd_add_opt(root, &opt_target);
+
     // -v, --verbose (计数)
     scc_argparse_opt_t opt_verbose;
     scc_argparse_opt_init(&opt_verbose, 'V', "verbose",

src/main.c

@@ -78,6 +78,7 @@ int main(int argc, const char **argv, const char **envp) {
         .output_file = null,
         .emit_ast = false,
         .emit_ir = false,
+        .target_description = "x86_64-pc-windows-msvc",
     };
     scc_vec_init(config.include_paths);