has_value_type< T, typename Void< typename T::value_type >::type > Struct Template Reference

has_value_type check if a type has defined a member value_type More...

Detailed Description

template<typename T>
struct has_value_type< T, typename Void< typename T::value_type >::type >

has_value_type check if a type has defined a member value_type

Example

        struct test_has_value_type
        {
            typedef int value_type;
        };

        struct test_has_no_value_type
        {

        };

        int val = has_value_type<test_has_value_type>::value;
        BOOST_REQUIRE_EQUAL(val, true);
        val = has_value_type<test_has_no_value_type>::value;
        BOOST_REQUIRE_EQUAL(val, false);

return true if T::value_type is a valid type

Definition at line 292 of file common.hpp.

#include <common.hpp>

Inheritance diagram for has_value_type< T, typename Void< typename T::value_type >::type >:

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The documentation for this struct was generated from the following file:

• openfpm_data/src/util/common.hpp