1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 int* j = false; // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
4 
5 void foo(int* i, int *j=(false)) // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
6 {
7   foo(false); // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
8   foo((int*)false); // no-warning: explicit cast
9   foo(0); // no-warning: not a bool, even though its convertible to bool
10 
11   foo(false == true); // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
12   foo((42 + 24) < 32); // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
13 
14   const bool kFlag = false;
15   foo(kFlag); // expected-warning{{initialization of pointer of type 'int *' to null from a constant boolean expression}}
16 }
17 
18 char f(struct Undefined*);
19 double f(...);
20 
21 // Ensure that when using false in metaprogramming machinery its conversion
22 // isn't flagged.
23 template <int N> struct S {};
24 S<sizeof(f(false))> s;
25