Enum templated template only

Question

Enum templated template only

Is there a way to ensure that a templated class will fail to compile if a particular template argument is supplied with something other than a strongly typed enum (i.e., an enum class)?

+3

c ++ enums c ++ 11 templates

Conduit 23 nov. '14 at 1:05

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1 answer

Columbo · Accepted Answer · 2014-11-23T01:08:20+0000

Use the sign and static_assert

.

those.

template <class T>
using is_scoped_enum = std::integral_constant<bool, !std::is_convertible<T, int>{}
                                                  && std::is_enum<T>{}>;

template <typename T>
struct myTemplate
{
   static_assert( is_scoped_enum<T>{}, "Invalid type argument!" );
};

^{(Derived from this answer .)}
Demo .

Enum templated template only

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