is_const_field< T, typename Void< typename T::const_field >::type > Struct Template Reference

is_constant check if a type define a constant field More...

Detailed Description

template<typename T>
struct is_const_field< T, typename Void< typename T::const_field >::type >

is_constant check if a type define a constant field

Example

 
struct anyname_field
{
    typedef void const_field;
 
    float val() {return 1.0;}
};
 
struct anyname_field_with_pos
{
    typedef void const_field;
 
    typedef void with_position;
 
    float val_pos(grid_key_dx<2> & pos) {return 1.0;}
};
 
struct no_field
{
};
 

 
    bool ret = is_const_field<anyname_field>::value;
    BOOST_REQUIRE_EQUAL(ret,true);
 
    ret = is_const_field<no_field>::value;
    BOOST_REQUIRE_EQUAL(ret,false);
 

return true if T::constant_field exist, it does not matter which type is

Definition at line 28 of file util_num.hpp.

#include <util_num.hpp>

Inheritance diagram for is_const_field< T, typename Void< typename T::const_field >::type >:

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

• openfpm_numerics/src/util/util_num.hpp