1 files changed, 95 insertions, 0 deletions
diff --git a/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p6.cpp b/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p6.cpp
new file mode 100644
index 0000000..6edf079
--- /dev/null
+++ b/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p6.cpp
@@ -0,0 +1,95 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+namespace test0 {
+  template<class T> void apply(T x, void (*f)(T)) { f(x); } // expected-note 2 {{failed template argument deduction}}\
+  // expected-note {{no overload of 'temp2' matching 'void (*)(int)'}}
+
+  template<class A> void temp(A);
+  void test0() {
+    // okay: deduce T=int from first argument, A=int during overload
+    apply(0, &temp);
+    apply(0, &temp<>);
+
+    // okay: deduce T=int from first and second arguments
+    apply(0, &temp<int>);
+
+    // deduction failure: T=int from first, T=long from second
+    apply(0, &temp<long>); // expected-error {{no matching function for call to 'apply'}}
+  }
+
+  void over(int);
+  int over(long);
+
+  void test1() {
+    // okay: deductions match
+    apply(0, &over);
+
+    // deduction failure: deduced T=long from first argument, T=int from second
+    apply(0L, &over); // expected-error {{no matching function for call to 'apply'}}
+  }
+
+  void over(short);
+
+  void test2() {
+    // deduce T=int from first arg, second arg is undeduced context,
+    // pick correct overload of 'over' during overload resolution for 'apply'
+    apply(0, &over);
+  }
+
+  template<class A, class B> B temp2(A);
+  void test3() {
+    // deduce T=int from first arg, A=int B=void during overload resolution
+    apply(0, &temp2);
+    apply(0, &temp2<>);
+    apply(0, &temp2<int>);
+
+    // overload failure
+    apply(0, &temp2<long>); // expected-error {{no matching function for call to 'apply'}}
+  }
+}
+
+namespace test1 {
+  template<class T> void invoke(void (*f)(T)) { f(T()); } // expected-note 6 {{couldn't infer template argument}} \
+  // expected-note {{failed template argument deduction}}
+
+  template<class T> void temp(T);
+  void test0() {
+    // deduction failure: overload has template => undeduced context
+    invoke(&temp); // expected-error {{no matching function for call to 'invoke'}}
+    invoke(&temp<>); // expected-error {{no matching function for call to 'invoke'}}
+
+    // okay: full template-id
+    invoke(&temp<int>);
+  }
+
+  void over(int);
+  int over(long);
+
+  void test1() {
+    // okay: only one overload matches
+    invoke(&over);
+  }
+
+  void over(short);
+
+  void test2() {
+    // deduction failure: overload has multiple matches => undeduced context
+    invoke(&over); // expected-error {{no matching function for call to 'invoke'}}
+  }
+
+  template<class A, class B> B temp2(A);
+  void test3() {
+    // deduction failure: overload has template => undeduced context
+    // (even though partial application temp2<int> could in theory
+    // let us infer T=int)
+    invoke(&temp2); // expected-error {{no matching function for call to 'invoke'}}
+    invoke(&temp2<>); // expected-error {{no matching function for call to 'invoke'}}
+    invoke(&temp2<int>); // expected-error {{no matching function for call to 'invoke'}}
+
+    // okay: full template-id
+    invoke(&temp2<int, void>);
+
+    // overload failure
+    invoke(&temp2<int, int>); // expected-error {{no matching function for call to 'invoke'}}
+  }
+}