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/**
** \file misc/select-const.hh
** \brief Select between a non const or a const type.
*/
#pragma once
namespace misc
{
/*------------------.
| const selectors. |
`------------------*/
/// Return \a T constified.
template <typename T> struct constify_traits
{
using type = const T;
};
/// Return \a T as is.
template <typename T> struct id_traits
{
using type = T;
};
/*------------------.
| select_iterator. |
`------------------*/
/// The iterator over a non const structure is plain iterator.
template <typename T> struct select_iterator
{
using type = typename T::iterator;
};
/// The iterator over a const structure is a const_iterator.
template <typename T> struct select_iterator<const T>
{
using type = typename T::const_iterator;
};
} //namespace misc
|
