stage1 重制18测试用例替换成match 完成现有全部测试

stage1/spl_comp.h

@@ -28,8 +28,9 @@ typedef enum {
     TYPE_INFER,        /* _ (to be inferred) */
 } spl_type_kind_t;
 
-/* Forward declaration */
+/* Forward declarations */
 typedef struct spl_type_info spl_type_info_t;
+typedef struct spl_comp spl_comp_t;
 
 /* Struct field */
 typedef struct {
@@ -89,6 +90,15 @@ const char *spl_type_str(spl_type_info_t *t);
 int spl_type_is_integer(spl_type_t bt);
 spl_type_info_t *spl_type_clone(spl_type_info_t *t);
 
+/* Determine the uniform type for LOAD/STORE codegen (i32→SPL_I32, ptr→SPL_PTR, else→SPL_PTR) */
+spl_type_t spl_type_emit_type(spl_type_info_t *type);
+
+/* Emit LOAD from [saved_ptr + byte_offset] and STORE to local var at var_offset.
+ * Stack: [] → []
+ * The saved_ptr is loaded from the 1-slot temp at ptr_slot_offset. */
+void spl_emit_load_to_var(spl_comp_t *ctx, int ptr_slot_offset, usize byte_offset,
+                          spl_type_info_t *data_type, int var_offset);
+
 /* ============================================================
  * Scope / symbol table
  * ============================================================ */
@@ -134,7 +144,7 @@ typedef struct {
     int count_at_decl; /* defer_count when declared */
 } spl_defer_entry_t;
 
-typedef struct {
+typedef struct spl_comp {
     /* Lexer output */
     spl_tok_vec_t toks;
     usize tok_idx;
@@ -162,6 +172,7 @@ typedef struct {
     int current_func_idx;
     spl_type_info_t *current_ret_type;
     int current_local_bytes;       /* next free local byte offset */
+    int peak_local_bytes;          /* peak current_local_bytes for ALLOC sizing */
     const char *current_type_name; /* name of type whose body we're parsing (for method short-name
                                       lookup) */