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diohabara · Jul 18, 2023 · 9cd1681 · 9cd1681
1 parent 628d267
commit 9cd1681
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/parse.c b/parse.c
@@ -499,6 +499,13 @@ VarList *read_func_param() {
   ty = declarator(ty, &name);
   ty = type_suffix(ty);
 
+  /* "array of T" is converted to "poitner to T" only in the parameter context.
+   * For example, *argv[] is converted to **argv by this.
+   */
+  if (ty->kind == TY_ARRAY) {
+    ty = pointer_to(ty->base);
+  }
+
   Var *var = push_var(name, ty, true, tok);
   push_scope(name)->var = var;
 

diff --git a/tests b/tests
@@ -60,6 +60,8 @@ int count() {
   return cnt;
 }
 
+int param_decay(int x[]) { return 0[x]; }
+
 int main() {
   assert(8, ({
            int a = 3;
@@ -777,6 +779,8 @@ int main() {
   assert(0, (2-2)&&5, "(2-2)&&5");
   assert(1, 1&&5, "1&&5");
 
+  assert(3, ({ int x[2]; x[0]=3; param_decay(x); }), "int x[2]; x[0]=3; param_decay(x);");
+
   printf("OK\n");
   return 0;
 }