vendor/clang/clang-release_39-r276489

1 files changed, 133 insertions, 0 deletions

diff --git a/test/SemaCXX/delete-and-function-templates.cpp b/test/SemaCXX/delete-and-function-templates.cpp
new file mode 100644
index 000000000000..22e95cb7937a
--- /dev/null
+++ b/test/SemaCXX/delete-and-function-templates.cpp
@@ -0,0 +1,133 @@
+// RUN: %clang_cc1 -std=c++11 -verify -fsyntax-only  -emit-llvm-only %s
+// RUN: %clang_cc1 -std=c++11 -verify -fsyntax-only  -fdelayed-template-parsing %s 
+// RUN: %clang_cc1 -std=c++11 -verify -fsyntax-only  -fms-extensions %s 
+// RUN: %clang_cc1 -std=c++11 -verify -fsyntax-only  -fdelayed-template-parsing -fms-extensions %s 
+
+template<class T, class U> struct is_same { enum { value = false }; };
+template<class T> struct is_same<T, T> { enum { value = true }; };
+
+namespace test_sfinae_and_delete {
+
+namespace ns1 {
+template<class T> double f(T) = delete; //expected-note{{candidate}}
+char f(...); //expected-note{{candidate}}
+
+static_assert(is_same<decltype(f(3)),char>::value, ""); //expected-error{{call to deleted function}} expected-error{{static_assert failed}}
+
+template<class T> decltype(f(T{})) g(T); // this one sfinae's out.
+template<class T> int *g(T);
+void foo() {
+  int *ip = g(3);
+}
+} //end ns1
+
+namespace ns2 {
+template<class T> double* f(T);
+template<> double* f(double) = delete;
+
+template<class T> decltype(f(T{})) g(T); // expected-note{{candidate}}
+template<class T> int *g(T); //expected-note{{candidate}}
+void foo() {
+  double *dp = g(3); //expected-error{{ambiguous}}
+  int *ip = g(3.14); // this is OK - because the explicit specialization is deleted and sfinae's out one of the template candidates
+}
+
+} // end ns2
+
+namespace ns3 {
+template<class T> double* f(T) = delete;
+template<> double* f(double);
+
+template<class T> decltype(f(T{})) g(T); // expected-note{{candidate}}
+template<class T> int *g(T); //expected-note{{candidate}}
+
+void foo() {
+  int *dp = g(3); // this is OK - because the non-double specializations are deleted and sfinae's out one of the template candidates
+  double *ip = g(3.14); //expected-error{{ambiguous}}
+}
+
+} // end ns3
+} // end ns test_sfinae_and_delete
+
+namespace test_explicit_specialization_of_member {
+namespace ns1 {
+template<class T> struct X {
+  int* f(T) = delete;
+}; 
+template<> int* X<int>::f(int) { }
+
+template<class T> decltype(X<T>{}.f(T{})) g(T); // expected-note{{candidate}}
+template<class T> int *g(T); //expected-note{{candidate}}
+
+void foo() {
+  int *ip2 = g(3.14); // this is OK - because the non-int specializations are deleted and sfinae's out one of the template candidates
+  int *ip = g(3); //expected-error{{ambiguous}}
+}
+
+} // end ns1
+
+namespace ns2 {
+struct X {
+template<class T> double* f(T) = delete;
+}; 
+template<> double* X::f(int);
+
+template<class T> decltype(X{}.f(T{})) g(T); // expected-note{{candidate}}
+template<class T> int *g(T); //expected-note{{candidate}}
+
+void foo() {
+  int *ip2 = g(3.14); // this is OK - because the non-int specializations are deleted and sfinae's out one of the template candidates
+  int *ip = g(3); //expected-error{{ambiguous}}
+}
+
+} // end ns2
+
+namespace ns3 {
+template<class T> struct X {
+  template<class U> double *f1(U, T) = delete;
+  template<class U> double *f2(U, T) = delete;
+};
+template<> template<> double* X<int>::f1(int, int);
+template<> template<class U> double* X<int>::f2(U, int);
+
+template<class T, class U> decltype(X<T>{}.f1(U{}, T{})) g1(U, T); // expected-note{{candidate}}
+template<class T, class U> int *g1(U, T); //expected-note{{candidate}}
+
+template<class T, class U> decltype(X<T>{}.f2(U{}, T{})) g2(U, T); // expected-note2{{candidate}}
+template<class T, class U> int *g2(U, T); //expected-note2{{candidate}}
+
+
+void foo() {
+  int *ip2 = g1(3.14, 3); // this is OK - because the non-int specializations are deleted and sfinae's out one of the template candidates
+  int *ip = g1(3, 3); //expected-error{{ambiguous}}
+  {
+   int *ip3 = g2(3.14, 3); //expected-error{{ambiguous}}
+   int *ip4 = g2(3, 3); //expected-error{{ambiguous}}
+  }
+  {
+   int *ip3 = g2(3.14, 3.14); 
+   int *ip4 = g2(3, 3.14); 
+  }
+}
+
+
+} // end ns3
+
+namespace ns4 {
+template < typename T> T* foo (T);
+template <> int* foo(int) = delete;
+template <> int* foo(int); //expected-note{{candidate}}
+
+int *IP = foo(2); //expected-error{{deleted}}
+double *DP = foo(3.14);
+} //end ns4
+
+namespace ns5 {
+template < typename T> T* foo (T);
+template <> int* foo(int); //expected-note{{previous}}
+template <> int* foo(int) = delete; //expected-error{{deleted definition must be first declaration}}
+
+} //end ns5
+
+
+} // end test_explicit_specializations_and_delete