feat(ast): 整型字面量支持显式宽度后缀 _int<N>/_uint<N>/_i<N>/_u<N>

ast/exprs.vp

@@ -82,11 +82,16 @@ class Constant(ExprNode):
     float_val:  double
     str_val:    str
     const_kind: int
+    # 显式整型宽度后缀（_int<N>/_uint<N>）：int_width>0 = 声明宽度，0 = 未指定；
+    # int_unsigned=1 表示 uint 形式。追加在末尾，保持既有字段偏移不变（经 __sizeof__ 分配并 memset）。
+    int_width:  int
+    int_unsigned: int
 
     def __new__(self, pool: memhub.MemManager*,
                 const_kind: int, int_val: int64,
                 float_val: double, str_val: str,
-                lineno: int, col: int):
+                lineno: int, col: int,
+                int_width: int = 0, int_unsigned: int = 0):
         ptr: Constant* = pool.alloc(Constant.__sizeof__())
         if ptr:
             string.memset(ptr, 0, Constant.__sizeof__())
@@ -95,11 +100,14 @@ class Constant(ExprNode):
     def __init__(self, pool: memhub.MemManager*,
                  const_kind: int, int_val: int64,
                  float_val: double, str_val: str,
-                 lineno: int, col: int):
+                 lineno: int, col: int,
+                 int_width: int = 0, int_unsigned: int = 0):
         _init_ast(self, pool, lineno, col)
         self.const_kind = const_kind
         self.int_val = int_val
         self.float_val = float_val
+        self.int_width = int_width
+        self.int_unsigned = int_unsigned
         if str_val is not None:
             self.str_val = _copy_str(pool, str_val)
         else:

ast/tokens.vp

@@ -200,6 +200,10 @@ class Token:
     end_lineno: int         # Ending line number
     end_col_offset: int     # Ending column offset
     next: Token*        # Next token in linked list
+    # 显式整型宽度后缀（_int<N>/_uint<N>/_i<N>/_u<N>）：N>0 = 声明宽度，0 = 未指定；
+    # int_unsigned=1 表示 uint<N> 形式。追加在末尾，保持既有字段偏移不变（Token 经 __sizeof__ 分配并 memset）。
+    int_width: int
+    int_unsigned: int
 
     def __new__(self, pool: memhub.MemManager*):
         """Allocate zero‑initialized Token struct memory from mpool"""
@@ -259,7 +263,7 @@ def _kw_index_put(entry: KwEntry*):
     h: uint64 = _kw_hash_str(entry.name)
     mask: sizet = sizet(_KW_IDX_CAP - 1)
     idx: sizet = sizet(h) & mask
-    for i in range(_KW_IDX_CAP):
+    for i in range(int(_KW_IDX_CAP)):
         slot: sizet* = (sizet*)(t.CPtr(uint64(_kw_index) + uint64(idx * 8)))
         cur_s: sizet = slot[0]
         if cur_s == 0:
@@ -302,7 +306,7 @@ def _kw_lookup(name: str) -> int:
         h: uint64 = _kw_hash_str(name)
         mask: sizet = sizet(_KW_IDX_CAP - 1)
         idx: sizet = sizet(h) & mask
-        for i in range(_KW_IDX_CAP):
+        for i in range(int(_KW_IDX_CAP)):
             slot: sizet* = (sizet*)(t.CPtr(uint64(_kw_index) + uint64(idx * 8)))
             cur_s: sizet = slot[0]
             if cur_s == 0:
@@ -520,7 +524,7 @@ def token_set_str(pool: memhub.MemManager*, tok: Token*,
     buf: str = pool.alloc(length + 1)
     if buf == None:
         _ast_pool_fatal("token.str_val", length + 1)
-    for i in range(length):
+    for i in range(int(length)):
         buf[i] = src[start + i]
     buf[length] = '\0'
     tok.str_val = buf