79 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s 2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s3// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s4 5struct ConvToBool {6 operator bool() const;7};8 9struct ConvToInt {10 operator int();11};12 13struct ExplicitConvToBool {14 explicit operator bool(); // expected-note {{explicit}}15#if __cplusplus <= 199711L // C++03 or earlier modes16 // expected-warning@-2{{explicit conversion functions are a C++11 extension}}17#endif18};19 20void test_conv_to_bool(ConvToBool ctb, ConvToInt cti, ExplicitConvToBool ecb) {21 if (ctb) { }22 if (cti) { }23 if (ecb) { }24 for (; ctb; ) { }25 for (; cti; ) { }26 for (; ecb; ) { }27 while (ctb) { };28 while (cti) { }29 while (ecb) { }30 do { } while (ctb);31 do { } while (cti);32 do { } while (ecb);33 34 if (!ctb) { }35 if (!cti) { }36 if (!ecb) { }37 38 bool b1 = !ecb;39 if (ctb && ecb) { }40 bool b2 = ctb && ecb;41 if (ctb || ecb) { }42 bool b3 = ctb || ecb;43}44 45void accepts_bool(bool) { } // expected-note{{candidate function}}46 47struct ExplicitConvToRef {48 explicit operator int&(); // expected-note {{explicit}}49#if (__cplusplus <= 199711L) // C++03 or earlier modes50 // expected-warning@-2{{explicit conversion functions are a C++11 extension}}51#endif52};53 54void test_explicit_bool(ExplicitConvToBool ecb) {55 bool b1(ecb); // okay56 bool b2 = ecb; // expected-error{{no viable conversion from 'ExplicitConvToBool' to 'bool'}}57 accepts_bool(ecb); // expected-error{{no matching function for call to}}58}59 60void test_explicit_conv_to_ref(ExplicitConvToRef ecr) {61 int& i1 = ecr; // expected-error{{no viable conversion from 'ExplicitConvToRef' to 'int'}}62 int& i2(ecr); // okay63}64 65struct A { };66struct B { };67struct C {68 explicit operator A&(); // expected-note {{explicit}}69#if __cplusplus <= 199711L // C++03 or earlier modes70// expected-warning@-2{{explicit conversion functions are a C++11 extension}}71#endif72 operator B&(); // expected-note{{candidate}}73};74 75void test_copy_init_conversions(C c) {76 A &a = c; // expected-error{{no viable conversion from 'C' to 'A'}}77 B &b = c; // okay78}79