llvm-project/clang/test/SemaCXX/deleted-function.cpp

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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -fcxx-exceptions %s
int i = delete; // expected-error {{only functions can have deleted definitions}}
void fn() = delete; // expected-note {{candidate function has been explicitly deleted}}
void fn2(); // expected-note {{previous declaration is here}}
void fn2() = delete; // expected-error {{deleted definition must be first declaration}}
void fn3() = delete; // expected-note {{previous definition is here}}
void fn3() { // expected-error {{redefinition}}
}
void ov(int) {} // expected-note {{candidate function}}
void ov(double) = delete; // expected-note {{candidate function has been explicitly deleted}}
struct WithDel {
WithDel() = delete; // expected-note {{function has been explicitly marked deleted here}}
void fn() = delete; // expected-note {{function has been explicitly marked deleted here}}
operator int() = delete; // expected-note {{function has been explicitly marked deleted here}}
void operator +(int) = delete;
int i = delete; // expected-error {{only functions can have deleted definitions}}
};
void test() {
fn(); // expected-error {{call to deleted function 'fn'}}
ov(1);
ov(1.0); // expected-error {{call to deleted function 'ov'}}
WithDel dd; // expected-error {{call to deleted constructor of 'WithDel'}}
WithDel *d = 0;
d->fn(); // expected-error {{attempt to use a deleted function}}
int i = *d; // expected-error {{invokes a deleted function}}
}
struct DelDtor {
~DelDtor() = delete; // expected-note 9{{here}}
};
void f() {
DelDtor *p = new DelDtor[3]; // expected-error {{attempt to use a deleted function}}
delete [] p; // expected-error {{attempt to use a deleted function}}
const DelDtor &dd2 = DelDtor(); // expected-error {{attempt to use a deleted function}}
DelDtor dd; // expected-error {{attempt to use a deleted function}}
throw dd; // expected-error {{attempt to use a deleted function}}
}
struct X : DelDtor {
~X() {} // expected-error {{attempt to use a deleted function}}
};
struct Y {
DelDtor dd;
~Y() {} // expected-error {{attempt to use a deleted function}}
};
struct Z : virtual DelDtor {
~Z() {} // expected-error {{attempt to use a deleted function}}
};
DelDtor dd; // expected-error {{attempt to use a deleted function}}
template<typename> void test2() = delete;
template void test2<int>();
// test3 really shouldn't have behavior that differs from test2 above
template<typename> void test3() = delete; // expected-note {{explicit instantiation refers here}}
template<typename> void test3();
template void test3<int>(); // expected-error {{explicit instantiation of undefined function template 'test3'}}