add support for passing through sizeof & alignofs

1 files changed, 12 insertions, 4 deletions

diff --git a/parse.c b/parse.c
index fe17515..0cbabc2 100644
--- a/parse.c
+++ b/parse.c
@@ -3020,7 +3020,9 @@ static Node *primary(Token **rest, Token *tok) {
       return new_binary(ND_COMMA, lhs, rhs, tok);
     }
 
-    return new_ulong(ty->size, start);
+    Node *res = new_ulong(ty->size, start);
+    res->is_sizeof = ty;
+    return res;
   }
 
   if (equal(tok, "sizeof")) {
@@ -3028,19 +3030,25 @@ static Node *primary(Token **rest, Token *tok) {
     add_type(node);
     if (node->ty->kind == TY_VLA)
       return new_var_node(node->ty->vla_size, tok);
-    return new_ulong(node->ty->size, tok);
+    Node *res = new_ulong(node->ty->size, tok);
+    res->is_sizeof = node->ty;
+    return res;
   }
 
   if (equal(tok, "_Alignof") && equal(tok->next, "(") && is_typename(tok->next->next)) {
     Type *ty = typename(&tok, tok->next->next);
     *rest = skip(tok, ")");
-    return new_ulong(ty->align, tok);
+    Node *res = new_ulong(ty->align, tok);
+    res->is_alignof = ty;
+    return res;
   }
 
   if (equal(tok, "_Alignof")) {
     Node *node = unary(rest, tok->next);
     add_type(node);
-    return new_ulong(node->ty->align, tok);
+    Node *res = new_ulong(node->ty->align, tok);
+    res->is_alignof = node->ty;
+    return res;
   }
 
   if (equal(tok, "_Generic"))