clang/test/SemaTemplate/instantiation-backtrace.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2 template<typename T> struct A; // expected-note 4{{template is declared here}}
   3
   4 template<typename T> struct B : A<T*> { }; // expected-error{{implicit instantiation of undefined template}} \
   5 // expected-error{{implicit instantiation of undefined template 'A<X *>'}}
   6
   7 template<typename T> struct C : B<T> { } ; // expected-note{{instantiation of template class}}
   8
   9 template<typename T> struct D : C<T> { }; // expected-note{{instantiation of template class}}
  10
  11 template<typename T> struct E : D<T> { }; // expected-note{{instantiation of template class}}
  12
  13 template<typename T> struct F : E<T(T)> { }; // expected-note{{instantiation of template class}}
  14
  15 void f() {
  16  (void)sizeof(F<int>); // expected-note{{instantiation of template class}}
  17 }
  18
  19 typedef struct { } X;
  20
  21 void g() {
  22   (void)sizeof(B<X>); // expected-note{{in instantiation of template class 'B<X>' requested here}}
  23 }
  24
  25 template<typename T>
  26 struct G : A<T>, // expected-error{{implicit instantiation of undefined template 'A<int>'}}
  27   A<T*> // expected-error{{implicit instantiation of undefined template 'A<int *>'}}
  28   { };
  29
  30 void h() {
  31   (void)sizeof(G<int>); // expected-note{{in instantiation of template class 'G<int>' requested here}}
  32 }
  33
  34 namespace PR13365 {
  35   template <class T> class ResultTy { // expected-warning {{does not declare any constructor}}
  36     T t; // expected-note {{reference member 't' will never be initialized}}
  37   };
  38
  39   template <class T1, class T2>
  40     typename ResultTy<T2>::error Deduce( void (T1::*member)(T2) ) {} // \
  41     // expected-note {{instantiation of template class 'PR13365::ResultTy<int &>'}} \
  42     // expected-note {{substitution failure [with T1 = PR13365::Cls, T2 = int &]}}
  43
  44   struct Cls {
  45     void method(int&);
  46   };
  47   void test() {
  48     Deduce(&Cls::method); // expected-error {{no matching function}} \
  49                           // expected-note {{substituting deduced template arguments into function template 'Deduce' [with T1 = PR13365::Cls, T2 = int &]}}
  50   }
  51 }