clang/test/SemaCXX/vla-construct.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcxx-exceptions -fexceptions -O0 -verify %s
   2 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcxx-exceptions -fexceptions -pedantic-errors -DPE -O0 -verify %s
   3
   4 # ifndef PE
   5 // expected-no-diagnostics
   6 # endif
   7
   8 extern "C" int printf(const char*, ...);
   9
  10 static int N;
  11 struct S {
  12   S() __attribute__ ((nothrow))  { printf("%d: S()\n", ++N); }
  13   ~S()  __attribute__ ((nothrow))  { printf("%d: ~S()\n", N--); }
  14   int n[17];
  15 };
  16
  17 void print(int n, int a, int b, int c, int d) {
  18   printf("n=%d\n,sizeof(S)=%d\nsizeof(array_t[0][0])=%d\nsizeof(array_t[0])=%d\nsizeof(array_t)=%d\n",
  19          n, a, b, c, d);
  20   if (n == 2) throw(n);
  21 }
  22
  23 void test(int n) {
  24   S array_t[n][n+1];
  25 # ifdef PE
  26    // expected-error@-2 {{variable length arrays are a C99 feature}} expected-note@-2 {{parameter}} expected-note@-3 {{here}}
  27    // expected-error@-3 {{variable length arrays are a C99 feature}} expected-note@-3 {{parameter}} expected-note@-4 {{here}}
  28 # endif
  29   int sizeof_S = sizeof(S);
  30   int sizeof_array_t_0_0 = sizeof(array_t[0][0]);
  31   int sizeof_array_t_0 = sizeof(array_t[0]);
  32   int sizeof_array_t = sizeof(array_t);
  33   print(n, sizeof_S, sizeof_array_t_0_0, sizeof_array_t_0, sizeof_array_t);
  34 }
  35
  36 int main()
  37 {
  38   try {
  39     test(2);
  40   } catch(int e) {
  41     printf("exception %d\n", e);
  42   }
  43   try {
  44     test(3);
  45   } catch(int e) {
  46     printf("exception %d", e);
  47   }
  48 }