1 // RUN: clang-cc -fsyntax-only -verify %s 2 3 // Errors 4 export class foo { }; // expected-error {{expected template}} 5 template x; // expected-error {{C++ requires a type specifier for all declarations}} 6 export template x; // expected-error {{expected '<' after 'template'}} \ 7 // expected-note {{exported templates are unsupported}} \ 8 // expected-error {{C++ requires a type specifier for all declarations}} 9 // See Sema::ParsedFreeStandingDeclSpec about the double diagnostic. This is 10 // because ParseNonTypeTemplateParameter starts parsing a DeclSpec. 11 template < ; // expected-error {{parse error}} expected-error {{declaration does not declare anything}} 12 template <template X> struct Err1; // expected-error {{expected '<' after 'template'}} 13 template <template <typename> > struct Err2; // expected-error {{expected 'class' before '>'}} 14 template <template <typename> Foo> struct Err3; // expected-error {{expected 'class' before 'Foo'}} 15 16 // Template function declarations 17 template <typename T> void foo(); 18 template <typename T, typename U> void foo(); 19 20 // Template function definitions. 21 template <typename T> void foo() { } 22 23 // Template class (forward) declarations 24 template <typename T> struct A; 25 template <typename T, typename U> struct b; 26 template <typename> struct C; 27 template <typename, typename> struct D; 28 29 // Forward declarations with default parameters? 30 template <typename T = int> class X1; 31 template <typename = int> class X2; 32 33 // Forward declarations w/template template parameters 34 template <template <typename> class T> class TTP1; 35 template <template <typename> class> class TTP2; 36 template <template <typename> class T = foo> class TTP3; // FIXME:expected-error{{template argument for template template parameter must be a template}} 37 template <template <typename> class = foo> class TTP3; // FIXME:expected-error{{template argument for template template parameter must be a template}} 38 template <template <typename X, typename Y> class T> class TTP5; 39 40 // Forward declararations with non-type params 41 template <int> class NTP0; 42 template <int N> class NTP1; 43 template <int N = 5> class NTP2; 44 template <int = 10> class NTP3; 45 template <unsigned int N = 12u> class NTP4; 46 template <unsigned int = 12u> class NTP5; 47 template <unsigned = 15u> class NTP6; 48 template <typename T, T Obj> class NTP7; 49 50 // Template class declarations 51 template <typename T> struct A { }; 52 template <typename T, typename U> struct B { }; 53 54 // Template parameter shadowing 55 template<typename T, // expected-note{{template parameter is declared here}} 56 typename T> // expected-error{{declaration of 'T' shadows template parameter}} 57 void shadow1(); 58 59 template<typename T> // expected-note{{template parameter is declared here}} 60 void shadow2(int T); // expected-error{{declaration of 'T' shadows template parameter}} 61 62 template<typename T> // expected-note{{template parameter is declared here}} 63 class T { // expected-error{{declaration of 'T' shadows template parameter}} 64 }; 65 66 template<int Size> // expected-note{{template parameter is declared here}} 67 void shadow3(int Size); // expected-error{{declaration of 'Size' shadows template parameter}} 68 69 // Non-type template parameters in scope 70 template<int Size> 71 void f(int& i) { 72 i = Size; 73 Size = i; // expected-error{{expression is not assignable}} 74 } 75 76 template<typename T> 77 const T& min(const T&, const T&); 78 79 void f2() { 80 int x; 81 A< typeof(x>1) > a; 82 } 83