72 lines
1.3 KiB
C++
72 lines
1.3 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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// C++03 requires that we check for a copy constructor when binding a
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// reference to a reference-compatible rvalue, since we are allowed to
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// make a copy. C++0x does not permit the copy, so ensure that we
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// don't diagnose cases where the copy constructor is unavailable.
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struct X1 {
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X1();
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explicit X1(const X1&);
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};
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struct X2 {
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X2();
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private:
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X2(const X2&);
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};
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struct X3 {
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X3();
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private:
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X3(X3&);
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};
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template<typename T>
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T get_value_badly() {
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double *dp = 0;
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T *tp = dp;
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return T();
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}
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template<typename T>
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struct X4 {
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X4();
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X4(const X4&, T = get_value_badly<T>());
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};
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struct X5 {
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X5();
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X5(const X5&, const X5& = X5());
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};
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void g1(const X1&);
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void g2(const X2&);
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void g3(const X3&);
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void g4(const X4<int>&);
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void g5(const X5&);
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void test() {
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g1(X1());
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g2(X2());
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g3(X3());
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g4(X4<int>());
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g5(X5());
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}
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// Check that unavailable copy constructors do not cause SFINAE failures.
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template<int> struct int_c { };
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template<typename T> T f(const T&);
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template<typename T>
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int &g(int_c<sizeof(f(T()))> * = 0); // expected-note{{candidate function [with T = X3]}}
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template<typename T> float &g(); // expected-note{{candidate function [with T = X3]}}
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void h() {
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float &fp = g<X3>(); // expected-error{{call to 'g' is ambiguous}}
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}
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