77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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static_assert(__is_literal(int), "fail");
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static_assert(__is_literal_type(int), "fail"); // alternate spelling for GCC
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static_assert(__is_literal(void*), "fail");
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enum E { E1 };
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static_assert(__is_literal(E), "fail");
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static_assert(__is_literal(decltype(E1)), "fail");
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typedef int IAR[10];
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static_assert(__is_literal(IAR), "fail");
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typedef int Vector __attribute__((vector_size(16)));
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typedef int VectorExt __attribute__((ext_vector_type(4)));
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static_assert(__is_literal(Vector), "fail");
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static_assert(__is_literal(VectorExt), "fail");
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// C++0x [basic.types]p10:
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// A type is a literal type if it is:
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// [...]
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// -- a class type that has all of the following properties:
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// -- it has a trivial destructor
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// -- every constructor call and full-expression in the
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// brace-or-equal-initializers for non-static data members (if an) is
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// a constant expression,
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// -- it is an aggregate type or has at least one constexpr constructor
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// or constructor template that is not a copy or move constructor, and
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// [DR1452 adds class types with trivial default constructors to
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// this list]
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// -- it has all non-static data members and base classes of literal
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// types
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struct Empty {};
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struct LiteralType {
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int x;
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E e;
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IAR arr;
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Empty empty;
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int method();
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};
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struct HasDtor { ~HasDtor(); };
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class NonAggregate { int x; };
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struct NonLiteral { NonLiteral(); };
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struct HasNonLiteralBase : NonLiteral {};
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struct HasNonLiteralMember { HasDtor x; };
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static_assert(__is_literal(Empty), "fail");
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static_assert(__is_literal(LiteralType), "fail");
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static_assert(__is_literal(NonAggregate), "fail");
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static_assert(!__is_literal(NonLiteral), "fail");
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static_assert(!__is_literal(HasDtor), "fail");
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static_assert(!__is_literal(HasNonLiteralBase), "fail");
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static_assert(!__is_literal(HasNonLiteralMember), "fail");
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// DR1361 removes the brace-or-equal-initializer bullet so that we can allow:
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extern int f(); // expected-note {{here}}
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struct HasNonConstExprMemInit {
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int x = f(); // expected-note {{non-constexpr function}}
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constexpr HasNonConstExprMemInit() {} // expected-error {{never produces a constant expression}}
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constexpr HasNonConstExprMemInit(int y) : x(y) {} // ok
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};
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static_assert(__is_literal(HasNonConstExprMemInit), "fail");
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class HasConstExprCtor {
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int x;
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public:
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constexpr HasConstExprCtor(int x) : x(x) {}
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};
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template <typename T> class HasConstExprCtorTemplate {
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T x;
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public:
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template <typename U> constexpr HasConstExprCtorTemplate(U y) : x(y) {}
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};
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template <typename T> class HasConstExprCtorT {
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constexpr HasConstExprCtorT(T) {}
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};
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static_assert(__is_literal(HasConstExprCtor), "fail");
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static_assert(__is_literal(HasConstExprCtorTemplate<int>), "fail");
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static_assert(__is_literal(HasConstExprCtorT<NonLiteral>), "fail");
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