libcruft-util/detail/coord.hpp

101 lines
2.5 KiB
C++

/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_COORD_HPP
#define __UTIL_COORD_HPP
#include "../platform.hpp"
namespace util {
namespace detail {
// Disable GCC warnings about validity of anonyous structures in
// unions. Push comes to shove I'll manually redsign everything to
// keep this syntax anyway.
#pragma GCC diagnostic push
#if defined(COMPILER_GCC)
#pragma GCC diagnostic ignored "-pedantic"
#endif
#if defined(COMPILER_CLANG)
#pragma GCC diagnostic ignored "-Wgnu"
#endif
template <size_t S>
struct coord_data {
coord_data () { ; }
template <typename ...T>
coord_data (T ...t): data{t...}
{ ; }
double data[S];
};
template <>
struct coord_data<1> {
coord_data () { ; }
template <typename ...T>
coord_data (T ...t): data{t...}
{ ; }
union {
double data[1];
double x;
};
};
template <>
struct coord_data<2> {
coord_data () { ; }
template <typename ...T>
coord_data (T ...t): data{t...}
{ ; }
union {
double data[2];
struct {
double x;
double y;
};
};
};
template <>
struct coord_data<3> {
union {
double data[3];
struct {
double x;
double y;
double z;
};
};
coord_data () { ; }
template <typename... T>
coord_data (T... t): data{t...}
{ ; }
};
#pragma GCC diagnostic pop
}
}
#endif