298 lines
10 KiB
C++
298 lines
10 KiB
C++
// 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-error {{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 undeclared template struct 'S'}}
|
|
template <> union U<int> { }; // expected-error{{explicit specialization of undeclared template union 'U'}}
|
|
|
|
struct SS;
|
|
union UU;
|
|
template <> struct SS<int> { }; // expected-error{{explicit specialization of non-template struct 'SS'}}
|
|
template <> union UU<int> { }; // expected-error{{explicit specialization of non-template union 'UU'}}
|
|
|
|
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));
|
|
}
|
|
|
|
}
|
|
|
|
namespace func_tmpl_spec_def_in_func {
|
|
// We failed to diagnose function template specialization definitions inside
|
|
// functions during recovery previously.
|
|
template <class> void FuncTemplate() {}
|
|
void TopLevelFunc() {
|
|
// expected-error@+2 {{expected a qualified name after 'typename'}}
|
|
// expected-error@+1 {{function definition is not allowed here}}
|
|
typename template <> void FuncTemplate<void>() { }
|
|
// expected-error@+1 {{function definition is not allowed here}}
|
|
void NonTemplateInner() { }
|
|
}
|
|
}
|
|
|
|
namespace broken_baseclause {
|
|
template<typename T>
|
|
struct base { };
|
|
|
|
struct t1 : base<int, // expected-note {{to match this '<'}}
|
|
public: // expected-error {{expected expression}} expected-error {{expected '>'}}
|
|
};
|
|
// expected-error@-1 {{expected '{' after base class list}}
|
|
struct t2 : base<int, // expected-note {{to match this '<'}}
|
|
public // expected-error {{expected expression}} expected-error {{expected '>'}}
|
|
};
|
|
// expected-error@-1 {{expected '{' after base class list}}
|
|
|
|
}
|
|
|
|
namespace class_scope_instantiation {
|
|
struct A {
|
|
template<typename T> void f(T);
|
|
template void f<int>(int); // expected-error {{expected '<' after 'template'}}
|
|
template void f(float); // expected-error {{expected '<' after 'template'}}
|
|
extern template // expected-error {{expected member name or ';'}}
|
|
void f(double);
|
|
};
|
|
}
|
|
|
|
namespace PR42071 {
|
|
template<int SomeTemplateName<void>> struct A; // expected-error {{parameter name cannot have template arguments}}
|
|
template<int operator+> struct B; // expected-error {{'operator+' cannot be the name of a parameter}}
|
|
struct Q {};
|
|
template<int Q::N> struct C; // expected-error {{parameter declarator cannot be qualified}}
|
|
template<int f(int a = 0)> struct D; // expected-error {{default arguments can only be specified for parameters in a function declaration}}
|
|
}
|
|
|
|
namespace AnnotateAfterInvalidTemplateId {
|
|
template<int I, int J> struct A { };
|
|
template<int J> struct A<0, J> { }; // expected-note {{J = 0}}
|
|
template<int I> struct A<I, 0> { }; // expected-note {{I = 0}}
|
|
|
|
void f() { A<0, 0>::f(); } // expected-error {{ambiguous partial specializations}}
|
|
}
|
|
|
|
namespace PR45063 {
|
|
template<class=class a::template b<>> struct X {}; // expected-error {{undeclared identifier 'a'}}
|
|
}
|
|
|
|
namespace NoCrashOnEmptyNestedNameSpecifier {
|
|
template <typename FnT,
|
|
typename T = typename ABC<FnT>::template arg_t<0>> // expected-error {{no template named 'ABC'}}
|
|
void foo(FnT) {}
|
|
}
|
|
|
|
namespace PR45239 {
|
|
// Ensure we don't crash here. We used to deallocate the TemplateIdAnnotation
|
|
// before we'd parsed it.
|
|
template<int> int b;
|
|
template<int> auto f() -> b<0>; // expected-error +{{}}
|
|
}
|
|
|
|
namespace PR46231 {
|
|
template; // expected-error {{declaration does not declare anything}}
|
|
template<>; // expected-error {{declaration does not declare anything}}
|
|
template<int>; // expected-error {{declaration does not declare anything}}
|
|
template int; // expected-error {{declaration does not declare anything}}
|
|
template<> int; // expected-error {{declaration does not declare anything}}
|
|
template<int> int; // expected-error {{declaration does not declare anything}}
|
|
}
|