1// RUN: %clang_cc1 -fsyntax-only -verify %s 2 3// Errors 4export class foo { }; // expected-error {{expected template}} 5template x; // expected-error {{C++ requires a type specifier for all declarations}} \ 6 // expected-error {{does not refer}} 7export template x; // expected-error {{expected '<' after 'template'}} 8export template<class T> class x0; // expected-warning {{exported templates are unsupported}} 9template < ; // expected-error {{expected template parameter}} \ 10// expected-error{{expected ',' or '>' in template-parameter-list}} \ 11// expected-warning {{declaration does not declare anything}} 12template <int +> struct x1; // expected-error {{expected ',' or '>' in template-parameter-list}} 13 14// verifies that we only walk to the ',' & still produce errors on the rest of the template parameters 15template <int +, T> struct x2; // expected-error {{expected ',' or '>' in template-parameter-list}} \ 16 expected-error {{expected unqualified-id}} 17template<template<int+>> struct x3; // expected-error {{expected ',' or '>' in template-parameter-list}} \ 18 expected-error {{template template parameter requires 'class' after the parameter list}} 19template <template X> struct Err1; // expected-error {{expected '<' after 'template'}} \ 20// expected-error{{extraneous}} 21template <template <typename> > struct Err2; // expected-error {{template template parameter requires 'class' after the parameter list}} 22template <template <typename> Foo> struct Err3; // expected-error {{template template parameter requires 'class' after the parameter list}} 23 24// Template function declarations 25template <typename T> void foo(); 26template <typename T, typename U> void foo(); 27 28// Template function definitions. 29template <typename T> void foo() { } 30 31// Template class (forward) declarations 32template <typename T> struct A; 33template <typename T, typename U> struct b; 34template <typename> struct C; 35template <typename, typename> struct D; 36 37// Forward declarations with default parameters? 38template <typename T = int> class X1; 39template <typename = int> class X2; 40 41// Forward declarations w/template template parameters 42template <template <typename> class T> class TTP1; 43template <template <typename> class> class TTP2; 44template <template <typename> class T = foo> class TTP3; // expected-error{{must be a class template}} 45template <template <typename> class = foo> class TTP3; // expected-error{{must be a class template}} 46template <template <typename X, typename Y> class T> class TTP5; 47 48// Forward declarations with non-type params 49template <int> class NTP0; 50template <int N> class NTP1; 51template <int N = 5> class NTP2; 52template <int = 10> class NTP3; 53template <unsigned int N = 12u> class NTP4; 54template <unsigned int = 12u> class NTP5; 55template <unsigned = 15u> class NTP6; 56template <typename T, T Obj> class NTP7; 57 58// Template class declarations 59template <typename T> struct A { }; 60template <typename T, typename U> struct B { }; 61 62// Template parameter shadowing 63template<typename T, // expected-note{{template parameter is declared here}} 64 typename T> // expected-error{{declaration of 'T' shadows template parameter}} 65 void shadow1(); 66 67template<typename T> // expected-note{{template parameter is declared here}} 68void shadow2(int T); // expected-error{{declaration of 'T' shadows template parameter}} 69 70template<typename T> // expected-note{{template parameter is declared here}} 71class T { // expected-error{{declaration of 'T' shadows template parameter}} 72}; 73 74template<int Size> // expected-note{{template parameter is declared here}} 75void shadow3(int Size); // expected-error{{declaration of 'Size' shadows template parameter}} 76 77// <rdar://problem/6952203> 78template<typename T> // expected-note{{here}} 79struct shadow4 { 80 int T; // expected-error{{shadows}} 81}; 82 83template<typename T> // expected-note{{here}} 84struct shadow5 { 85 int T(int, float); // expected-error{{shadows}} 86}; 87 88// Non-type template parameters in scope 89template<int Size> 90void f(int& i) { 91 i = Size; 92 Size = i; // expected-error{{expression is not assignable}} 93} 94 95template<typename T> 96const T& min(const T&, const T&); 97 98void f2() { 99 int x; 100 A< typeof(x>1) > a; 101} 102 103 104// PR3844 105template <> struct S<int> { }; // expected-error{{explicit specialization of non-template struct 'S'}} 106 107namespace PR6184 { 108 namespace N { 109 template <typename T> 110 void bar(typename T::x); 111 } 112 113 template <typename T> 114 void N::bar(typename T::x) { } 115} 116