Merge branch 'master' of ssh://bitbucket.org/czan/honours

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'}}
+}