151 lines
5.2 KiB
C++
151 lines
5.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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template<template<typename T> class X> struct A; // expected-note 2{{previous template template parameter is here}}
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template<template<typename T, int I> class X> struct B; // expected-note{{previous template template parameter is here}}
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template<template<int I> class X> struct C; // expected-note 2{{previous non-type template parameter with type 'int' is here}}
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template<class> struct X; // expected-note{{too few template parameters in template template argument}}
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template<int N> struct Y; // expected-note{{template parameter has a different kind in template argument}}
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template<long N> struct Ylong; // expected-note{{template non-type parameter has a different type 'long' in template argument}}
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template<const int &N> struct Yref; // expected-note{{template non-type parameter has a different type 'const int &' in template argument}}
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namespace N {
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template<class> struct Z;
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}
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template<class, class> struct TooMany; // expected-note{{too many template parameters in template template argument}}
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A<X> *a1;
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A<N::Z> *a2;
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A< ::N::Z> *a3;
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A<Y> *a4; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}}
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A<TooMany> *a5; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}}
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B<X> *a6; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}}
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C<Y> *a7;
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C<Ylong> *a8; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}}
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C<Yref> *a9; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}}
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template<typename T> void f(int);
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A<f> *a9; // expected-error{{must be a class template}}
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// Evil digraph '<:' is parsed as '[', expect error.
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A<::N::Z> *a10;
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#if __cplusplus <= 199711L
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// expected-error@-2 {{found '<::' after a template name which forms the digraph '<:' (aka '[') and a ':', did you mean '< ::'?}}
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#endif
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// Do not do a digraph correction here.
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A<: :N::Z> *a11; // expected-error{{expected expression}} \
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expected-error{{C++ requires a type specifier for all declarations}}
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// PR7807
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namespace N {
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template <typename, typename = int>
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struct X
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{ };
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template <typename ,int>
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struct Y
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{ X<int> const_ref(); };
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template <template<typename,int> class TT, typename T, int N>
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int operator<<(int, TT<T, N> a) { // expected-note{{candidate template ignored}}
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0 << a.const_ref(); // expected-error{{invalid operands to binary expression ('int' and 'X<int>')}}
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}
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void f0( Y<int,1> y){ 1 << y; } // expected-note{{in instantiation of function template specialization 'N::operator<<<Y, int, 1>' requested here}}
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}
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// PR12179
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template <typename Primitive, template <Primitive...> class F>
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#if __cplusplus <= 199711L
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// expected-warning@-2 {{variadic templates are a C++11 extension}}
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#endif
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struct unbox_args {
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typedef typename Primitive::template call<F> x;
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};
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template <template <typename> class... Templates>
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#if __cplusplus <= 199711L
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// expected-warning@-2 {{variadic templates are a C++11 extension}}
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#endif
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struct template_tuple {
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#if __cplusplus >= 201103L
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static constexpr int N = sizeof...(Templates);
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#endif
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};
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template <typename T>
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struct identity {};
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template <template <typename> class... Templates>
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#if __cplusplus <= 199711L
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// expected-warning@-2 {{variadic templates are a C++11 extension}}
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#endif
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template_tuple<Templates...> f7() {}
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#if __cplusplus >= 201103L
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struct S : public template_tuple<identity, identity> {
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static_assert(N == 2, "Number of template arguments incorrect");
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};
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#endif
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void foo() {
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f7<identity>();
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}
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namespace CheckDependentNonTypeParamTypes {
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template<template<typename T, typename U, T v> class X> struct A {
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void f() {
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X<int, void*, 3> x; // expected-error {{does not refer to any declaration}}
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}
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void g() {
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X<int, long, 3> x;
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}
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void h() {
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// FIXME: If we accept A<B> at all, it's not obvious what should happen
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// here. While parsing the template, we form
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// X<unsigned char, int, (unsigned char)1234>
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// but in the final instantiation do we get
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// B<unsigned char, int, (int)1234>
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// or
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// B<unsigned char, int, (int)(unsigned char)1234>
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// ?
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X<unsigned char, int, 1234> x;
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int check[x.value == 1234 ? 1 : -1];
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}
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};
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template<typename T, typename U, U v> struct B { // expected-note {{parameter}}
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static const U value = v;
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};
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// FIXME: This should probably be rejected, but the rules are at best unclear.
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A<B> ab;
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void use() {
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ab.f(); // expected-note {{instantiation of}}
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ab.g();
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ab.h();
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}
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}
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namespace PR32185 {
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template<template<typename T, T> class U> struct A {};
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template<template<typename T, T> class U> struct B : A<U> {};
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}
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namespace PR10147 {
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template<typename T> struct A {};
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template<typename T = int> struct A;
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template<template<typename...> class A> void f(A<int>*) { A<> a; } // expected-warning 0-1{{extension}}
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void g() { f((A<>*)0); }
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}
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