has_attributes< T, typename Void< decltype(T::attributes::name[0])>::type > Struct Template Reference

has_attributes check if a type has defined an internal structure with attributes More...

#include <common.hpp>

Inheritance diagram for has_attributes< T, typename Void< decltype(T::attributes::name[0])>::type >:

Detailed Description

template<typename T>
struct has_attributes< T, typename Void< decltype(T::attributes::name[0])>::type >

has_attributes check if a type has defined an internal structure with attributes

Example

 
struct test_has_attributes
{
    struct attributes
    {
        static const std::string name[2];
    };
};
 
// attribute names
const std::string test_has_attributes::attributes::name[]={"attributes1","attributes2"};
 
struct test_no_attributes
{
};
 

 
        int val = has_attributes<test_has_attributes>::value;
        BOOST_REQUIRE_EQUAL(val, true);
        val = has_attributes<test_no_attributes>::value;
        BOOST_REQUIRE_EQUAL(val, false);
 

return true if T::attributes::name[0] is a valid expression and produce a defined type

Definition at line 95 of file common.hpp.

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

• openfpm_data/src/util/common.hpp