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Diffstat (limited to 'clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p3-0x.cpp')
-rw-r--r-- | clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p3-0x.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p3-0x.cpp b/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p3-0x.cpp new file mode 100644 index 0000000..e470dd0 --- /dev/null +++ b/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p3-0x.cpp @@ -0,0 +1,46 @@ +// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s + + +// If P is an rvalue reference to a cv-unqualified template parameter +// and the argument is an lvalue, the type "lvalue reference to A" is +// used in place of A for type deduction. +template<typename T> struct X { }; + +template<typename T> X<T> f0(T&&); + +struct Y { }; + +template<typename T> T prvalue(); +template<typename T> T&& xvalue(); +template<typename T> T& lvalue(); + +void test_f0() { + X<int> xi0 = f0(prvalue<int>()); + X<int> xi1 = f0(xvalue<int>()); + X<int&> xi2 = f0(lvalue<int>()); + X<Y> xy0 = f0(prvalue<Y>()); + X<Y> xy1 = f0(xvalue<Y>()); + X<Y&> xy2 = f0(lvalue<Y>()); +} + +template<typename T> X<T> f1(const T&&); // expected-note{{candidate function [with T = int] not viable: no known conversion from 'int' to 'const int &&' for 1st argument}} \ +// expected-note{{candidate function [with T = Y] not viable: no known conversion from 'Y' to 'const Y &&' for 1st argument}} + +void test_f1() { + X<int> xi0 = f1(prvalue<int>()); + X<int> xi1 = f1(xvalue<int>()); + f1(lvalue<int>()); // expected-error{{no matching function for call to 'f1'}} + X<Y> xy0 = f1(prvalue<Y>()); + X<Y> xy1 = f1(xvalue<Y>()); + f1(lvalue<Y>()); // expected-error{{no matching function for call to 'f1'}} +} + +namespace std_example { + template <class T> int f(T&&); + template <class T> int g(const T&&); // expected-note{{candidate function [with T = int] not viable: no known conversion from 'int' to 'const int &&' for 1st argument}} + + int i; + int n1 = f(i); + int n2 = f(0); + int n3 = g(i); // expected-error{{no matching function for call to 'g'}} +} |