clang/test/SemaCXX/address-of-temporary.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -Wno-error=address-of-temporary -verify -std=gnu++11 %s
   2 struct X {
   3   X();
   4   X(int);
   5   X(int, int);
   6 };
   7
   8 void f0() { (void)&X(); } // expected-warning{{taking the address of a temporary object}}
   9 void f1() { (void)&X(1); } // expected-warning{{taking the address of a temporary object}}
  10 void f2() { (void)&X(1, 2); } // expected-warning{{taking the address of a temporary object}}
  11 void f3() { (void)&(X)1; } // expected-warning{{taking the address of a temporary object}}
  12
  13
  14 namespace PointerToArrayDecay {
  15   struct Y {
  16     int a[4];
  17   };
  18   struct Z {
  19     int n;
  20     ~Z();
  21   };
  22
  23   typedef int A[4];
  24   typedef Z AZ[4];
  25
  26   template<typename T> void consume(T);
  27   struct S { int *p; };
  28
  29   void g0() { int *p = Y().a; } // expected-warning{{will be destroyed at the end of the full-expression}}
  30   void g1() { int *p = Y{}.a; } // expected-warning{{will be destroyed at the end of the full-expression}}
  31   void g2() { int *p = A{}; } // expected-warning{{will be destroyed at the end of the full-expression}}
  32   void g3() { int *p = (A){}; } // expected-warning{{will be destroyed at the end of the full-expression}}
  33   void g4() { Z *p = AZ{}; } // expected-warning{{will be destroyed at the end of the full-expression}}
  34   void g5() { Z *p = &(Z&)(AZ{}[0]); } // expected-warning{{will be destroyed at the end of the full-expression}}
  35
  36   void h0() { consume(Y().a); }
  37   void h1() { consume(Y{}.a); }
  38   void h2() { consume(A{}); }
  39   void h3() { consume((A){}); }
  40   void h4() { consume(AZ{}); }
  41
  42   void i0() { S s = { Y().a }; } // expected-warning{{will be destroyed at the end of the full-expression}}
  43   void i1() { S s = { Y{}.a }; } // expected-warning{{will be destroyed at the end of the full-expression}}
  44   void i2() { S s = { A{} }; } // expected-warning{{will be destroyed at the end of the full-expression}}
  45   void i3() { S s = { (A){} }; } // expected-warning{{will be destroyed at the end of the full-expression}}
  46
  47   void j0() { (void)S { Y().a }; }
  48   void j1() { (void)S { Y{}.a }; }
  49   void j2() { (void)S { A{} }; }
  50   void j3() { (void)S { (A){} }; }
  51
  52   void k0() { consume(S { Y().a }); }
  53   void k1() { consume(S { Y{}.a }); }
  54   void k2() { consume(S { A{} }); }
  55   void k3() { consume(S { (A){} }); }
  56 }