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// RUN: %clang_cc1 -fsyntax-only -verify %s
// RUN: %clang_cc1 -fsyntax-only -verify %s -fdelayed-template-parsing -DDELAYED_TEMPLATE_PARSING
// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++1z %s
// Errors
export class foo { }; // expected-error {{expected template}}
template x; // expected-error {{C++ requires a type specifier for all declarations}} \
// expected-error {{does not refer}}
export template x; // expected-error {{expected '<' after 'template'}}
export template<class T> class x0; // expected-warning {{exported templates are unsupported}}
template < ; // expected-error {{expected template parameter}} \
// expected-error{{expected ',' or '>' in template-parameter-list}} \
// expected-warning {{declaration does not declare anything}}
template <int +> struct x1; // expected-error {{expected ',' or '>' in template-parameter-list}}
// verifies that we only walk to the ',' & still produce errors on the rest of the template parameters
template <int +, T> struct x2; // expected-error {{expected ',' or '>' in template-parameter-list}} \
expected-error {{expected unqualified-id}}
template<template<int+>> struct x3; // expected-error {{expected ',' or '>' in template-parameter-list}} \
expected-error {{template template parameter requires 'class' after the parameter list}}
template <template X> struct Err1; // expected-error {{expected '<' after 'template'}} \
// expected-error{{extraneous}}
template <template <typename> > struct Err2; // expected-error {{template template parameter requires 'class' after the parameter list}}
template <template <typename> Foo> struct Err3; // expected-error {{template template parameter requires 'class' after the parameter list}}
template <template <typename> typename Foo> struct Cxx1z;
#if __cplusplus <= 201402L
// expected-warning@-2 {{extension}}
#endif
// Template function declarations
template <typename T> void foo();
template <typename T, typename U> void foo();
// Template function definitions.
template <typename T> void foo() { }
// Template class (forward) declarations
template <typename T> struct A;
template <typename T, typename U> struct b;
template <typename> struct C;
template <typename, typename> struct D;
// Forward declarations with default parameters?
template <typename T = int> class X1;
template <typename = int> class X2;
// Forward declarations w/template template parameters
template <template <typename> class T> class TTP1;
template <template <typename> class> class TTP2;
template <template <typename> class T = foo> class TTP3; // expected-error{{must be a class template}}
template <template <typename> class = foo> class TTP3; // expected-error{{must be a class template}}
template <template <typename X, typename Y> class T> class TTP5;
// Forward declarations with non-type params
template <int> class NTP0;
template <int N> class NTP1;
template <int N = 5> class NTP2;
template <int = 10> class NTP3;
template <unsigned int N = 12u> class NTP4;
template <unsigned int = 12u> class NTP5;
template <unsigned = 15u> class NTP6;
template <typename T, T Obj> class NTP7;
// Template class declarations
template <typename T> struct A { };
template <typename T, typename U> struct B { };
// Template parameter shadowing
template<typename T, // expected-note{{template parameter is declared here}}
typename T> // expected-error{{declaration of 'T' shadows template parameter}}
void shadow1();
template<typename T> // expected-note{{template parameter is declared here}}
void shadow2(int T); // expected-error{{declaration of 'T' shadows template parameter}}
template<typename T> // expected-note{{template parameter is declared here}}
class T { // expected-error{{declaration of 'T' shadows template parameter}}
};
template<int Size> // expected-note{{template parameter is declared here}}
void shadow3(int Size); // expected-error{{declaration of 'Size' shadows template parameter}}
// <rdar://problem/6952203>
template<typename T> // expected-note{{here}}
struct shadow4 {
int T; // expected-error{{shadows}}
};
template<typename T> // expected-note{{here}}
struct shadow5 {
int T(int, float); // expected-error{{shadows}}
};
template<typename T, // expected-note{{template parameter is declared here}}
T T> // expected-error{{declaration of 'T' shadows template parameter}}
void shadow6();
template<typename T, // expected-note{{template parameter is declared here}}
template<typename> class T> // expected-error{{declaration of 'T' shadows template parameter}}
void shadow7();
// PR8302
template<template<typename> class T> struct shadow8 { // expected-note{{template parameter is declared here}}
template<template<typename> class T> struct inner; // expected-error{{declaration of 'T' shadows template parameter}}
};
// Non-type template parameters in scope
template<int Size>
void f(int& i) {
i = Size;
#ifdef DELAYED_TEMPLATE_PARSING
Size = i;
#else
Size = i; // expected-error{{expression is not assignable}}
#endif
}
template<typename T>
const T& min(const T&, const T&);
void f2() {
int x;
A< typeof(x>1) > a;
}
// PR3844
template <> struct S<int> { }; // expected-error{{explicit specialization of non-template struct 'S'}}
template <> union U<int> { }; // expected-error{{explicit specialization of non-template union 'U'}}
namespace PR6184 {
namespace N {
template <typename T>
void bar(typename T::x);
}
template <typename T>
void N::bar(typename T::x) { }
}
// This PR occurred only in template parsing mode.
namespace PR17637 {
template <int>
struct L {
template <typename T>
struct O {
template <typename U>
static void Fun(U);
};
};
template <int k>
template <typename T>
template <typename U>
void L<k>::O<T>::Fun(U) {}
void Instantiate() { L<0>::O<int>::Fun(0); }
}
namespace explicit_partial_specializations {
typedef char (&oneT)[1];
typedef char (&twoT)[2];
typedef char (&threeT)[3];
typedef char (&fourT)[4];
typedef char (&fiveT)[5];
typedef char (&sixT)[6];
char one[1];
char two[2];
char three[3];
char four[4];
char five[5];
char six[6];
template<bool b> struct bool_ { typedef int type; };
template<> struct bool_<false> { };
#define XCAT(x,y) x ## y
#define CAT(x,y) XCAT(x,y)
#define sassert(_b_) bool_<(_b_)>::type CAT(var, __LINE__);
template <int>
struct L {
template <typename T>
struct O {
template <typename U>
static oneT Fun(U);
};
};
template <int k>
template <typename T>
template <typename U>
oneT L<k>::O<T>::Fun(U) { return one; }
template<>
template<>
template<typename U>
oneT L<0>::O<char>::Fun(U) { return one; }
void Instantiate() {
sassert(sizeof(L<0>::O<int>::Fun(0)) == sizeof(one));
sassert(sizeof(L<0>::O<char>::Fun(0)) == sizeof(one));
}
}
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