34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-constant-conversion %s
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// Bool literals can be enum values.
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enum {
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ReadWrite = false,
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ReadOnly = true
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};
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// bool cannot be decremented, and gives a warning on increment
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void test(bool b)
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{
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++b; // expected-warning {{incrementing expression of type bool is deprecated}}
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b++; // expected-warning {{incrementing expression of type bool is deprecated}}
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--b; // expected-error {{cannot decrement expression of type bool}}
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b--; // expected-error {{cannot decrement expression of type bool}}
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bool *b1 = (int *)0; // expected-error{{cannot initialize}}
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}
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// static_assert_arg_is_bool(x) compiles only if x is a bool.
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template <typename T>
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void static_assert_arg_is_bool(T x) {
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bool* p = &x;
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}
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void test2() {
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int n = 2;
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static_assert_arg_is_bool(n && 4); // expected-warning {{use of logical '&&' with constant operand}} \
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// expected-note {{use '&' for a bitwise operation}} \
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// expected-note {{remove constant to silence this warning}}
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static_assert_arg_is_bool(n || 5); // expected-warning {{use of logical '||' with constant operand}} \
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// expected-note {{use '|' for a bitwise operation}}
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}
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