test: match sema + codegen 单元测试，总断言 145→158

test/test_sema.c

@@ -365,6 +365,59 @@ void test_method_undefined() {
     arena_destroy(&a);
 }
 
+/* === match 语义分析测试 === */
+
+void test_match_enum_sema_ok() {
+    Arena a = arena_create(1);
+    size_t tc; ErrorInfo lex_err = {0};
+    Token* toks = lex(&a,
+        "enum Color { Red, Green, Blue } fn main() -> i64 { let c = Color::Green; match c { Color::Red => { return 1; } Color::Green => { return 2; } _ => { return 0; } } return 0; }",
+        "test", &tc, &lex_err);
+    ASSERT(toks != NULL);
+    ErrorInfo parse_err = {0};
+    AstNode* ast = parse(&a, toks, tc, "test", &parse_err);
+    ASSERT(ast != NULL);
+
+    ErrorList errors; error_init(&errors);
+    sema_analyze(ast, &errors, &a);
+    ASSERT(errors.count == 0);  // match 去糖后应通过类型检查
+    arena_destroy(&a);
+}
+
+void test_match_int_sema_ok() {
+    Arena a = arena_create(1);
+    size_t tc; ErrorInfo lex_err = {0};
+    Token* toks = lex(&a,
+        "fn main() -> i64 { let x: i64 = 42; match x { 1 => { return 10; } 42 => { return 20; } _ => { return 0; } } return 0; }",
+        "test", &tc, &lex_err);
+    ASSERT(toks != NULL);
+    ErrorInfo parse_err = {0};
+    AstNode* ast = parse(&a, toks, tc, "test", &parse_err);
+    ASSERT(ast != NULL);
+
+    ErrorList errors; error_init(&errors);
+    sema_analyze(ast, &errors, &a);
+    ASSERT(errors.count == 0);
+    arena_destroy(&a);
+}
+
+void test_match_wildcard_only_sema_ok() {
+    Arena a = arena_create(1);
+    size_t tc; ErrorInfo lex_err = {0};
+    Token* toks = lex(&a,
+        "fn main() -> i64 { let x: i64 = 42; match x { _ => { return 99; } } return 0; }",
+        "test", &tc, &lex_err);
+    ASSERT(toks != NULL);
+    ErrorInfo parse_err = {0};
+    AstNode* ast = parse(&a, toks, tc, "test", &parse_err);
+    ASSERT(ast != NULL);
+
+    ErrorList errors; error_init(&errors);
+    sema_analyze(ast, &errors, &a);
+    ASSERT(errors.count == 0);  // 纯通配符 match 应通过
+    arena_destroy(&a);
+}
+
 int main(void) {
     TEST_RUN(test_type_error);
     TEST_RUN(test_undefined_var);
@@ -387,5 +440,8 @@ int main(void) {
     TEST_RUN(test_array_assign_ok);
     TEST_RUN(test_method_call_ok);
     TEST_RUN(test_method_undefined);
+    TEST_RUN(test_match_enum_sema_ok);
+    TEST_RUN(test_match_int_sema_ok);
+    TEST_RUN(test_match_wildcard_only_sema_ok);
     return test_summary();
 }