313 lines
14 KiB
C++
313 lines
14 KiB
C++
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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++98 %s -verify=expected,cxx98-14,cxx98-11 -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 %s -verify=expected,cxx98-14,cxx98-11,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++14 %s -verify=expected,cxx98-14,since-cxx14,since-cxx11,cxx14 -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++17 %s -verify=expected,since-cxx14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++2a %s -verify=expected,since-cxx14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
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namespace dr705 { // dr705: yes
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namespace N {
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struct S {};
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void f(S); // #dr705-f
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}
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void g() {
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N::S s;
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f(s); // ok
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(f)(s);
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// expected-error@-1 {{use of undeclared identifier 'f'}}
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// expected-note@#dr705-f {{'N::f' declared here}}
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}
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}
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namespace dr712 { // dr712: partial
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void use(int);
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void f() {
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const int a = 0; // #dr712-f-a
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struct X {
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void g(bool cond) {
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use(a);
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use((a));
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use(cond ? a : a);
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// FIXME: should only warn once
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use((cond, a));
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// expected-warning@-1 {{left operand of comma operator has no effect}}
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// expected-warning@-2 {{left operand of comma operator has no effect}}
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(void)a;
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// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'dr712::f'}} FIXME
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// expected-note@#dr712-f-a {{'a' declared here}}
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(void)(a);
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// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'dr712::f'}} FIXME
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// expected-note@#dr712-f-a {{'a' declared here}}
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(void)(cond ? a : a); // #dr712-ternary
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// expected-error@#dr712-ternary {{reference to local variable 'a' declared in enclosing function 'dr712::f'}} FIXME
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// expected-note@#dr712-f-a {{'a' declared here}}
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// expected-error@#dr712-ternary {{reference to local variable 'a' declared in enclosing function 'dr712::f'}} FIXME
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// expected-note@#dr712-f-a {{'a' declared here}}
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(void)(cond, a); // #dr712-comma
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// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'dr712::f'}} FIXME
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// expected-note@#dr712-f-a {{'a' declared here}}
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// expected-warning@#dr712-comma {{left operand of comma operator has no effect}}
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}
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};
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}
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#if __cplusplus >= 201103L
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void g() {
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struct A { int n; };
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constexpr A a = {0}; // #dr712-g-a
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struct X {
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void g(bool cond) {
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use(a.n);
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use(a.*&A::n);
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(void)a.n;
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// since-cxx11-error@-1 {{reference to local variable 'a' declared in enclosing function 'dr712::g'}} FIXME
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// since-cxx11-note@#dr712-g-a {{'a' declared here}}
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(void)(a.*&A::n);
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// since-cxx11-error@-1 {{reference to local variable 'a' declared in enclosing function 'dr712::g'}} FIXME
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// since-cxx11-note@#dr712-g-a {{'a' declared here}}
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}
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};
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}
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#endif
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}
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namespace dr727 { // dr727: partial
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struct A {
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template<typename T> struct C; // #dr727-C
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template<typename T> void f(); // #dr727-f
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template<typename T> static int N; // #dr727-N
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// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
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template<> struct C<int>;
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template<> void f<int>();
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template<> static int N<int>;
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template<typename T> struct C<T*>;
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template<typename T> static int N<T*>;
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struct B {
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template<> struct C<float>;
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// expected-error@-1 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<> void f<float>();
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// expected-error@-1 {{no function template matches function template specialization 'f'}}
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template<> static int N<float>;
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// expected-error@-1 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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template<typename T> struct C<T**>;
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// expected-error@-1 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<typename T> static int N<T**>;
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// expected-error@-1 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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template<> struct A::C<double>;
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// expected-error@-1 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<> void A::f<double>();
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// expected-error@-1 {{o function template matches function template specialization 'f'}}
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// expected-error@-2 {{non-friend class member 'f' cannot have a qualified name}}
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template<> static int A::N<double>;
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// expected-error@-1 {{non-friend class member 'N' cannot have a qualified name}}
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// expected-error@-2 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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template<typename T> struct A::C<T***>;
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// expected-error@-1 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<typename T> static int A::N<T***>;
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// expected-error@-1 {{non-friend class member 'N' cannot have a qualified name}}
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// expected-error@-2 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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};
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};
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template<> struct A::C<char>;
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template<> void A::f<char>();
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template<> int A::N<char>;
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template<typename T> struct A::C<T****>;
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template<typename T> int A::N<T****>;
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namespace C {
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template<> struct A::C<long>;
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// expected-error@-1 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<> void A::f<long>();
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// expected-error@-1 {{function template specialization of 'f' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-f {{explicitly specialized declaration is here}}
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template<> int A::N<long>;
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// expected-error@-1 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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template<typename T> struct A::C<T*****>;
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// expected-error@-1 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-C {{explicitly specialized declaration is here}}
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template<typename T> int A::N<T*****>;
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// expected-error@-1 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
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// expected-note@#dr727-N {{explicitly specialized declaration is here}}
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}
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template<typename>
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struct D {
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template<typename T> struct C { typename T::error e; };
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// expected-error@-1 {{type 'float' cannot be used prior to '::' because it has no members}}
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// expected-note@#dr727-C-float {{in instantiation of template class 'dr727::D<int>::C<float>' requested here}}
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template<typename T> void f() { T::error; }
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// expected-error@-1 {{type 'float' cannot be used prior to '::' because it has no members}}
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// expected-note@#dr727-f-float {{in instantiation of function template specialization 'dr727::D<int>::f<float>' requested here}}
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template<typename T> static const int N = T::error;
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// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
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// expected-error@-2 {{type 'float' cannot be used prior to '::' because it has no members}}
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// expected-note@#dr727-N-float {{in instantiation of static data member 'dr727::D<int>::N<float>' requested here}}
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template<> struct C<int> {};
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template<> void f<int>() {}
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template<> static const int N<int>;
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template<typename T> struct C<T*> {};
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template<typename T> static const int N<T*>;
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template<typename>
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struct E {
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template<> void f<void>() {}
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// expected-error@-1 {{no candidate function template was found for dependent member function template specialization}}
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};
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};
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void d(D<int> di) {
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D<int>::C<int>();
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di.f<int>();
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int a = D<int>::N<int>;
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D<int>::C<int*>();
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int b = D<int>::N<int*>;
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D<int>::C<float>(); // #dr727-C-float
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di.f<float>(); // #dr727-f-float
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int c = D<int>::N<float>; // #dr727-N-float
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}
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namespace mixed_inner_outer_specialization {
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#if __cplusplus >= 201103L
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template<int> struct A {
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template<int> constexpr int f() const { return 1; }
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template<> constexpr int f<0>() const { return 2; }
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};
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template<> template<int> constexpr int A<0>::f() const { return 3; }
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template<> template<> constexpr int A<0>::f<0>() const { return 4; }
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static_assert(A<1>().f<1>() == 1, "");
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static_assert(A<1>().f<0>() == 2, "");
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static_assert(A<0>().f<1>() == 3, "");
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static_assert(A<0>().f<0>() == 4, "");
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#endif
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#if __cplusplus >= 201402L
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template<int> struct B {
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template<int> static const int u = 1;
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template<> static const int u<0> = 2; // #dr727-u0
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// Note that in C++17 onwards, these are implicitly inline, and so the
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// initializer of v<0> is not instantiated with the declaration. In
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// C++14, v<0> is a non-defining declaration and its initializer is
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// instantiated with the class.
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template<int> static constexpr int v = 1;
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template<> static constexpr int v<0> = 2; // #dr727-v0
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template<int> static const inline int w = 1;
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// cxx14-error@-1 {{inline variables are a C++17 extension}}
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template<> static const inline int w<0> = 2;
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// cxx14-error@-1 {{inline variables are a C++17 extension}}
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};
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template<> template<int> constexpr int B<0>::u = 3;
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template<> template<> constexpr int B<0>::u<0> = 4;
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// since-cxx14-error@-1 {{static data member 'u' already has an initializer}}
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// since-cxx14-note@#dr727-u0 {{previous initialization is here}}
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template<> template<int> constexpr int B<0>::v = 3;
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template<> template<> constexpr int B<0>::v<0> = 4;
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// cxx14-error@-1 {{static data member 'v' already has an initializer}}
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// cxx14-note@#dr727-v0 {{previous initialization is here}}
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template<> template<int> constexpr int B<0>::w = 3;
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template<> template<> constexpr int B<0>::w<0> = 4;
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static_assert(B<1>().u<1> == 1, "");
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static_assert(B<1>().u<0> == 2, "");
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static_assert(B<0>().u<1> == 3, "");
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static_assert(B<1>().v<1> == 1, "");
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static_assert(B<1>().v<0> == 2, "");
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static_assert(B<0>().v<1> == 3, "");
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static_assert(B<0>().v<0> == 4, "");
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// cxx14-error@-1 {{static assertion failed due to requirement 'dr727::mixed_inner_outer_specialization::B<0>().v<0> == 4'}}
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// cxx14-note@-2 {{expression evaluates to '2 == 4'}}
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static_assert(B<1>().w<1> == 1, "");
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static_assert(B<1>().w<0> == 2, "");
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static_assert(B<0>().w<1> == 3, "");
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static_assert(B<0>().w<0> == 4, "");
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#endif
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}
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template<typename T, typename U> struct Collision {
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// FIXME: Missing diagnostic for duplicate function explicit specialization declaration.
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template<typename> int f1();
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template<> int f1<T>();
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template<> int f1<U>();
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// FIXME: Missing diagnostic for fucntion redefinition!
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template<typename> int f2();
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template<> int f2<T>() {}
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template<> int f2<U>() {}
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template<typename> static int v1;
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// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
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template<> static int v1<T>; // #dr727-v1-T
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template<> static int v1<U>;
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// expected-error@-1 {{duplicate member 'v1'}}
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// expected-note@#dr727-Collision-int-int {{in instantiation of template class 'dr727::Collision<int, int>' requested here}}
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// expected-note@#dr727-v1-T {{previous}}
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template<typename> static inline int v2;
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// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
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// cxx98-14-error@-2 {{inline variables are a C++17 extension}}
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template<> static inline int v2<T>; // #dr727-v2-T
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// cxx98-14-error@-1 {{inline variables are a C++17 extension}}
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template<> static inline int v2<U>;
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// cxx98-14-error@-1 {{inline variables are a C++17 extension}}
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// expected-error@-2 {{duplicate member 'v2'}}
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// expected-note@#dr727-v2-T {{previous declaration is here}}
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// FIXME: Missing diagnostic for duplicate class explicit specialization.
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template<typename> struct S1;
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template<> struct S1<T>;
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template<> struct S1<U>;
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template<typename> struct S2;
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template<> struct S2<T> {}; // #dr727-S2-T
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template<> struct S2<U> {};
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// expected-error@-1 {{redefinition of 'S2<int>'}}
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// expected-note@#dr727-S2-T {{previous}}
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};
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Collision<int, int> c; // #dr727-Collision-int-int
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}
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namespace dr777 { // dr777: 3.7
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#if __cplusplus >= 201103L
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template <typename... T>
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void f(int i = 0, T ...args) {}
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void ff() { f(); }
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template <typename... T>
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void g(int i = 0, T ...args, T ...args2) {}
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template <typename... T>
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void h(int i = 0, T ...args, int j = 1) {}
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#endif
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}
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