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// RUN: %clang_cc1 -std=c++11 -verify %s
typedef int (*fp)(int);
int surrogate(int);
struct X {
X() = default; // expected-note{{candidate constructor not viable: requires 0 arguments, but 1 was provided}}
X(const X&) = default; // expected-note{{candidate constructor not viable: no known conversion from 'bool' to 'const X' for 1st argument}}
X(bool b) __attribute__((enable_if(b, "chosen when 'b' is true"))); // expected-note{{candidate disabled: chosen when 'b' is true}}
void f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero")));
void f(int n) __attribute__((enable_if(n == 1, "chosen when 'n' is one"))); // expected-note{{member declaration nearly matches}} expected-note{{candidate disabled: chosen when 'n' is one}}
static void s(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))); // expected-note2{{candidate disabled: chosen when 'n' is zero}}
void conflict(int n) __attribute__((enable_if(n+n == 10, "chosen when 'n' is five"))); // expected-note{{candidate function}}
void conflict(int n) __attribute__((enable_if(n*2 == 10, "chosen when 'n' is five"))); // expected-note{{candidate function}}
operator long() __attribute__((enable_if(true, "chosen on your platform")));
operator int() __attribute__((enable_if(false, "chosen on other platform")));
operator fp() __attribute__((enable_if(false, "never enabled"))) { return surrogate; } // expected-note{{conversion candidate of type 'int (*)(int)'}} // FIXME: the message is not displayed
};
void X::f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))) // expected-note{{member declaration nearly matches}} expected-note{{candidate disabled: chosen when 'n' is zero}}
{
}
void X::f(int n) __attribute__((enable_if(n == 2, "chosen when 'n' is two"))) // expected-error{{out-of-line definition of 'f' does not match any declaration in 'X'}} expected-note{{candidate disabled: chosen when 'n' is two}}
{
}
X x1(true);
X x2(false); // expected-error{{no matching constructor for initialization of 'X'}}
__attribute__((deprecated)) constexpr int old() { return 0; } // expected-note2{{'old' has been explicitly marked deprecated here}}
void deprec1(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero"))); // expected-warning{{'old' is deprecated}}
void deprec2(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero"))); // expected-warning{{'old' is deprecated}}
void overloaded(int);
void overloaded(long);
struct Nothing { };
template<typename T> void typedep(T t) __attribute__((enable_if(t, ""))); // expected-note{{candidate disabled:}} expected-error{{value of type 'Nothing' is not contextually convertible to 'bool'}}
template<int N> void valuedep() __attribute__((enable_if(N == 1, "")));
// FIXME: we skip potential constant expression evaluation on value dependent
// enable-if expressions
int not_constexpr();
template<int N> void valuedep() __attribute__((enable_if(N == not_constexpr(), "")));
template <typename T> void instantiationdep() __attribute__((enable_if(sizeof(sizeof(T)) != 0, "")));
void test() {
X x;
x.f(0);
x.f(1);
x.f(2); // no error, suppressed by erroneous out-of-line definition
x.f(3); // expected-error{{no matching member function for call to 'f'}}
x.s(0);
x.s(1); // expected-error{{no matching member function for call to 's'}}
X::s(0);
X::s(1); // expected-error{{no matching member function for call to 's'}}
x.conflict(5); // expected-error{{call to member function 'conflict' is ambiguous}}
deprec2(0);
overloaded(x);
int i = x(1); // expected-error{{no matching function for call to object of type 'X'}}
Nothing n;
typedep(0); // expected-error{{no matching function for call to 'typedep'}}
typedep(1);
typedep(n); // expected-note{{in instantiation of function template specialization 'typedep<Nothing>' requested here}}
}
template <typename T> class C {
void f() __attribute__((enable_if(T::expr == 0, ""))) {}
void g() { f(); }
};
int fn3(bool b) __attribute__((enable_if(b, "")));
template <class T> void test3() {
fn3(sizeof(T) == 1);
}
// FIXME: issue an error (without instantiation) because ::h(T()) is not
// convertible to bool, because return types aren't overloadable.
void h(int);
template <typename T> void outer() {
void local_function() __attribute__((enable_if(::h(T()), "")));
local_function();
};
namespace PR20988 {
struct Integer {
Integer(int);
};
int fn1(const Integer &) __attribute__((enable_if(true, "")));
template <class T> void test1() {
int &expr = T::expr();
fn1(expr);
}
int fn2(const Integer &) __attribute__((enable_if(false, ""))); // expected-note{{candidate disabled}}
template <class T> void test2() {
int &expr = T::expr();
fn2(expr); // expected-error{{no matching function for call to 'fn2'}}
}
int fn3(bool b) __attribute__((enable_if(b, "")));
template <class T> void test3() {
fn3(sizeof(T) == 1);
}
}
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