| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
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| 2 | |
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| 3 | // C++03 requires that we check for a copy constructor when binding a |
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| 4 | // reference to a reference-compatible rvalue, since we are allowed to |
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| 5 | // make a copy. C++0x does not permit the copy, so ensure that we |
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| 6 | // don't diagnose cases where the copy constructor is unavailable. |
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| 7 | |
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| 8 | struct X1 { |
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| 9 | X1(); |
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| 10 | explicit X1(const X1&); |
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| 11 | }; |
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| 12 | |
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| 13 | struct X2 { |
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| 14 | X2(); |
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| 15 | |
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| 16 | private: |
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| 17 | X2(const X2&); |
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| 18 | }; |
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| 19 | |
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| 20 | struct X3 { |
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| 21 | X3(); |
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| 22 | |
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| 23 | private: |
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| 24 | X3(X3&); |
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| 25 | }; |
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| 26 | |
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| 27 | template<typename T> |
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| 28 | T get_value_badly() { |
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| 29 | double *dp = 0; |
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| 30 | T *tp = dp; |
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| 31 | return T(); |
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| 32 | } |
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| 33 | |
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| 34 | template<typename T> |
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| 35 | struct X4 { |
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| 36 | X4(); |
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| 37 | X4(const X4&, T = get_value_badly<T>()); |
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| 38 | }; |
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| 39 | |
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| 40 | void g1(const X1&); |
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| 41 | void g2(const X2&); |
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| 42 | void g3(const X3&); |
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| 43 | void g4(const X4<int>&); |
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| 44 | |
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| 45 | void test() { |
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| 46 | g1(X1()); |
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| 47 | g2(X2()); |
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| 48 | g3(X3()); |
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| 49 | g4(X4<int>()); |
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| 50 | } |
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| 51 | |
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| 52 | // Check that unavailable copy constructors do not cause SFINAE failures. |
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| 53 | template<int> struct int_c { }; |
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| 54 | |
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| 55 | template<typename T> T f(const T&); |
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| 56 | |
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| 57 | template<typename T> |
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| 58 | int &g(int_c<sizeof(f(T()))> * = 0); // expected-note{{candidate function [with T = X3]}} |
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| 59 | |
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| 60 | template<typename T> float &g(); // expected-note{{candidate function [with T = X3]}} |
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| 61 | |
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| 62 | void h() { |
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| 63 | float &fp = g<X3>(); // expected-error{{call to 'g' is ambiguous}} |
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| 64 | } |
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| 65 | |
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