clang/test/SemaCXX/vla.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -verify %s
   2
   3 // PR11925
   4 int n;
   5 int (&f())[n]; // expected-error {{function declaration cannot have variably modified type}}
   6
   7 namespace PR18581 {
   8   template<typename T> struct pod {};
   9   template<typename T> struct error {
  10     typename T::error e; // expected-error {{cannot be used prior to '::'}}
  11   };
  12   struct incomplete; // expected-note {{forward declaration}}
  13
  14   void f(int n) {
  15     pod<int> a[n];
  16     error<int> b[n]; // expected-note {{instantiation}}
  17     incomplete c[n]; // expected-error {{incomplete}}
  18   }
  19 }
  20
  21 void pr23151(int (&)[*]) { // expected-error {{variable length array must be bound in function definition}}
  22 }
  23
  24 void test_fold() {
  25   char a1[(unsigned long)(int *)0+1]{}; // expected-warning{{variable length array folded to constant array as an extension}}
  26   char a2[(unsigned long)(int *)0+1] = {}; // expected-warning{{variable length array folded to constant array as an extension}}
  27   char a3[(unsigned long)(int *)0+1];
  28 }