clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.partial/p11.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 template <class T> T* f(int);   // #1
   4 template <class T, class U> T& f(U); // #2
   5
   6 void g() {
   7   int *ip = f<int>(1);  // calls #1
   8 }
   9
  10 template<typename T>
  11 struct identity {
  12   typedef T type;
  13 };
  14
  15 template <class T>
  16   T* f2(int, typename identity<T>::type = 0);
  17 template <class T, class U>
  18   T& f2(U, typename identity<T>::type = 0);
  19
  20 void g2() {
  21   int* ip = f2<int>(1);
  22 }
  23
  24 template<class T, class U> struct A { };
  25
  26 template<class T, class U> inline int *f3( U, A<U,T>* p = 0 ); // #1 expected-note{{candidate function [with T = int, U = int]}}
  27 template<         class U> inline float *f3( U, A<U,U>* p = 0 ); // #2 expected-note{{candidate function [with U = int]}}
  28
  29 void g3() {
  30    float *fp = f3<int>( 42, (A<int,int>*)0 );  // Ok, picks #2.
  31    f3<int>( 42 );                  // expected-error{{call to 'f3' is ambiguous}}
  32
  33 }
  34
  35 namespace PR9006 {
  36   struct X {
  37     template <class Get>
  38     int &f(char const* name, Get fget, char const* docstr = 0);
  39
  40     template <class Get, class Set>
  41     float &f(char const* name, Get fget, Set fset, char const* docstr = 0);
  42   };
  43
  44   void test(X x) {
  45     int &ir = x.f("blah", 0, "blah");
  46   }
  47 }