libcruft-util/coord/iostream.hpp

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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2016-2019 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "./traits.hpp"
#include "../iterator/infix.hpp"
#include <fmt/format.h>
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#include <cstddef>
#include <ostream>
#include <algorithm>
namespace cruft {
template <
typename K,
typename = std::enable_if_t<is_coord_v<K>,void>
>
std::ostream&
operator<< (std::ostream &os, const K &k)
{
os << "[";
std::transform (std::cbegin (k),
std::cend (k),
iterator::infix_iterator<typename K::value_type> (os, ", "),
[] (auto i) { return +i; });
os << "]";
return os;
}
}
template <typename T>
struct fmt::formatter<
T,
std::enable_if_t<cruft::is_coord_v<T>, char>
> {
constexpr format_parse_context::iterator
parse (format_parse_context &ctx)
{
return ctx.begin ();
}
format_context::iterator
format (T const &val, format_context &ctx)
{
return fmt::format_to (
ctx.out (),
"[{}]",
fmt::join (std::begin (val), std::end (val), ", ")
);
}
};