clang/test/SemaCXX/operator-new-size-diagnose_if.cpp

   1 // RUN: %clang_cc1 %s -verify -fno-builtin -std=c++14
   2
   3 using size_t = decltype(sizeof(int));
   4
   5 #define _diagnose_if(...) __attribute__((diagnose_if(__VA_ARGS__)))
   6
   7 namespace operator_new {
   8 struct T0 {
   9   int j = 0;
  10   static void *operator new(size_t i) _diagnose_if(i == sizeof(int), "yay", "warning"); // expected-note{{from 'diagnose_if'}}
  11 };
  12
  13 struct T1 {
  14   int j = 0;
  15   static void *operator new[](size_t i) _diagnose_if(i == 8 * sizeof(int), "yay", "warning"); // expected-note 2{{from 'diagnose_if'}}
  16 };
  17
  18 void run(int x) {
  19   new T0;       // expected-warning{{yay}}
  20   new T1[8];    // expected-warning{{yay}}
  21   new T1[4][2]; // expected-warning{{yay}}
  22   new T1[x];    // no warning.
  23 }
  24 } // namespace operator_new