66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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struct ConvToBool {
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operator bool() const;
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};
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struct ConvToInt {
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operator int();
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};
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struct ExplicitConvToBool {
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explicit operator bool(); // expected-warning{{explicit conversion functions are a C++11 extension}}
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};
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void test_conv_to_bool(ConvToBool ctb, ConvToInt cti, ExplicitConvToBool ecb) {
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if (ctb) { }
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if (cti) { }
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if (ecb) { }
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for (; ctb; ) { }
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for (; cti; ) { }
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for (; ecb; ) { }
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while (ctb) { };
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while (cti) { }
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while (ecb) { }
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do { } while (ctb);
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do { } while (cti);
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do { } while (ecb);
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if (!ctb) { }
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if (!cti) { }
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if (!ecb) { }
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bool b1 = !ecb;
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if (ctb && ecb) { }
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bool b2 = ctb && ecb;
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if (ctb || ecb) { }
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bool b3 = ctb || ecb;
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}
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void accepts_bool(bool) { } // expected-note{{candidate function}}
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struct ExplicitConvToRef {
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explicit operator int&(); // expected-warning{{explicit conversion functions are a C++11 extension}}
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};
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void test_explicit_bool(ExplicitConvToBool ecb) {
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bool b1(ecb); // okay
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bool b2 = ecb; // expected-error{{no viable conversion from 'ExplicitConvToBool' to 'bool'}}
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accepts_bool(ecb); // expected-error{{no matching function for call to}}
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}
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void test_explicit_conv_to_ref(ExplicitConvToRef ecr) {
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int& i1 = ecr; // expected-error{{non-const lvalue reference to type 'int' cannot bind to a value of unrelated type 'ExplicitConvToRef'}}
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int& i2(ecr); // okay
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}
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struct A { };
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struct B { };
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struct C {
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explicit operator A&(); // expected-warning{{explicit conversion functions are a C++11 extension}}
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operator B&(); // expected-note{{candidate}}
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};
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void test_copy_init_conversions(C c) {
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A &a = c; // expected-error{{no viable conversion from 'C' to 'A'}}
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B &b = c; // okay
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}
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