1 // RUN: %clang_cc1 -fsyntax-only -verify -Wno-constant-conversion %s 2 3 // Bool literals can be enum values. 4 enum { 5 ReadWrite = false, 6 ReadOnly = true 7 }; 8 9 // bool cannot be decremented, and gives a warning on increment 10 void test(bool b) 11 { 12 ++b; // expected-warning {{incrementing expression of type bool is deprecated}} 13 b++; // expected-warning {{incrementing expression of type bool is deprecated}} 14 --b; // expected-error {{cannot decrement expression of type bool}} 15 b--; // expected-error {{cannot decrement expression of type bool}} 16 17 bool *b1 = (int *)0; // expected-error{{cannot initialize}} 18 } 19 20 // static_assert_arg_is_bool(x) compiles only if x is a bool. 21 template <typename T> 22 void static_assert_arg_is_bool(T x) { 23 bool* p = &x; 24 } 25 26 void test2() { 27 int n = 2; 28 static_assert_arg_is_bool(n && 4); // expected-warning {{use of logical '&&' with constant operand}} \ 29 // expected-note {{use '&' for a bitwise operation}} \ 30 // expected-note {{remove constant to silence this warning}} 31 static_assert_arg_is_bool(n || 5); // expected-warning {{use of logical '||' with constant operand}} \ 32 // expected-note {{use '|' for a bitwise operation}} 33 } 34
