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1 // RUN: %clang_cc1 -fsyntax-only -verify -Wno-constant-conversion %s
2 // RUN: %clang_cc1 -fsyntax-only -verify -Wno-constant-conversion \
3 // RUN:     -Wno-deprecated -Wdeprecated-increment-bool %s
4 
5 // Bool literals can be enum values.
6 enum {
7   ReadWrite = false,
8   ReadOnly = true
9 };
10 
11 // bool cannot be decremented, and gives a warning on increment
test(bool b)12 void test(bool b)
13 {
14   ++b; // expected-warning {{incrementing expression of type bool is deprecated}}
15   b++; // expected-warning {{incrementing expression of type bool is deprecated}}
16   --b; // expected-error {{cannot decrement expression of type bool}}
17   b--; // expected-error {{cannot decrement expression of type bool}}
18 
19   bool *b1 = (int *)0; // expected-error{{cannot initialize}}
20 }
21 
22 // static_assert_arg_is_bool(x) compiles only if x is a bool.
23 template <typename T>
static_assert_arg_is_bool(T x)24 void static_assert_arg_is_bool(T x) {
25   bool* p = &x;
26 }
27 
test2()28 void test2() {
29   int n = 2;
30   static_assert_arg_is_bool(n && 4);  // expected-warning {{use of logical '&&' with constant operand}} \
31                                       // expected-note {{use '&' for a bitwise operation}} \
32                                       // expected-note {{remove constant to silence this warning}}
33   static_assert_arg_is_bool(n || 5);  // expected-warning {{use of logical '||' with constant operand}} \
34                                       // expected-note {{use '|' for a bitwise operation}}
35 }
36