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      1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
      2 
      3 static_assert(__is_literal(int), "fail");
      4 static_assert(__is_literal_type(int), "fail"); // alternate spelling for GCC
      5 static_assert(__is_literal(void*), "fail");
      6 enum E { E1 };
      7 static_assert(__is_literal(E), "fail");
      8 static_assert(__is_literal(decltype(E1)), "fail");
      9 typedef int IAR[10];
     10 static_assert(__is_literal(IAR), "fail");
     11 typedef int Vector __attribute__((vector_size(16)));
     12 typedef int VectorExt __attribute__((ext_vector_type(4)));
     13 static_assert(__is_literal(Vector), "fail");
     14 static_assert(__is_literal(VectorExt), "fail");
     15 
     16 // C++0x [basic.types]p10:
     17 //   A type is a literal type if it is:
     18 //    [...]
     19 //    -- a class type that has all of the following properties:
     20 //        -- it has a trivial destructor
     21 //        -- every constructor call and full-expression in the
     22 //           brace-or-equal-initializers for non-static data members (if an) is
     23 //           a constant expression,
     24 //        -- it is an aggregate type or has at least one constexpr constructor
     25 //           or constructor template that is not a copy or move constructor, and
     26 //        -- it has all non-static data members and base classes of literal
     27 //           types
     28 struct Empty {};
     29 struct LiteralType {
     30   int x;
     31   E e;
     32   IAR arr;
     33   Empty empty;
     34   int method();
     35 };
     36 struct HasDtor { ~HasDtor(); };
     37 
     38 class NonAggregate { int x; };
     39 struct HasNonLiteralBase : NonAggregate {};
     40 struct HasNonLiteralMember { HasDtor x; };
     41 
     42 static_assert(__is_literal(Empty), "fail");
     43 static_assert(__is_literal(LiteralType), "fail");
     44 static_assert(!__is_literal(HasDtor), "fail");
     45 static_assert(!__is_literal(NonAggregate), "fail");
     46 static_assert(!__is_literal(HasNonLiteralBase), "fail");
     47 static_assert(!__is_literal(HasNonLiteralMember), "fail");
     48 
     49 // FIXME: Test constexpr constructors and non-static members with initializers
     50 // when Clang supports them:
     51 #if 0
     52 extern int f();
     53 struct HasNonConstExprMemInit {
     54   int x = f();
     55   constexpr HasNonConstExprMemInit(int y) {}
     56 };
     57 static_assert(!__is_literal(HasNonConstExprMemInit), "fail");
     58 
     59 class HasConstExprCtor {
     60   int x;
     61 public:
     62   constexpr HasConstExprCtor(int x) : x(x) {}
     63 };
     64 template <typename T> class HasConstExprCtorTemplate {
     65   T x;
     66 public:
     67   template <typename U> constexpr HasConstExprCtorTemplate(U y) : x(y) {}
     68 };
     69 static_assert(__is_literal(HasConstExprCtor), "fail");
     70 static_assert(__is_literal(HasConstExprCtorTemplate), "fail");
     71 #endif
     72