forked from mpusz/mp-units
Mateusz Pusz
b982921d27
Now References can be disabled to meassure a compile time impact. Also the same examples are now provided in two subdirectories to be able to easily compare the pros and cons of every quantity construction technique.
141 lines
5.1 KiB
C++
141 lines
5.1 KiB
C++
// The MIT License (MIT)
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//
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// Copyright (c) 2018 Mateusz Pusz
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#pragma once
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#include <units/bits/external/hacks.h>
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#include <units/isq/si/length.h>
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#include <units/quantity_kind.h>
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UNITS_DIAGNOSTIC_PUSH
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UNITS_DIAGNOSTIC_IGNORE_UNREACHABLE
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#include <fmt/format.h>
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UNITS_DIAGNOSTIC_POP
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#include <limits>
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#include <ostream>
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// IWYU pragma: begin_exports
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#include <compare>
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// IWYU pragma: end_exports
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namespace geographic {
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template<typename Derived, typename Rep>
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struct coordinate {
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using value_type = Rep;
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constexpr explicit coordinate(value_type v) : value_(v) {}
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value_type value() const { return value_; }
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auto operator<=>(const coordinate&) const = default;
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private:
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value_type value_;
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};
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struct latitude : coordinate<struct latitude_, double> {
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using coordinate::coordinate;
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};
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struct longitude : coordinate<struct longitude_, double> {
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using coordinate::coordinate;
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};
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template<class CharT, class Traits>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const latitude& lat)
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{
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if (lat.value() > 0)
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return os << "N" << lat.value();
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else
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return os << "S" << -lat.value();
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}
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template<class CharT, class Traits>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const longitude& lon)
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{
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if (lon.value() > 0)
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return os << "E" << lon.value();
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else
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return os << "W" << -lon.value();
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}
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inline namespace literals {
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constexpr auto operator"" _N(unsigned long long v) { return latitude(static_cast<latitude::value_type>(v)); }
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constexpr auto operator"" _N(long double v) { return latitude(static_cast<latitude::value_type>(v)); }
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constexpr auto operator"" _S(unsigned long long v) { return latitude(-static_cast<latitude::value_type>(v)); }
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constexpr auto operator"" _S(long double v) { return latitude(-static_cast<latitude::value_type>(v)); }
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constexpr auto operator"" _E(unsigned long long v) { return longitude(static_cast<longitude::value_type>(v)); }
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constexpr auto operator"" _E(long double v) { return longitude(static_cast<longitude::value_type>(v)); }
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constexpr auto operator"" _W(unsigned long long v) { return longitude(-static_cast<longitude::value_type>(v)); }
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constexpr auto operator"" _W(long double v) { return longitude(-static_cast<longitude::value_type>(v)); }
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} // namespace literals
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} // namespace geographic
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template<>
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class std::numeric_limits<geographic::latitude> : public numeric_limits<geographic::latitude::value_type> {
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static constexpr auto min() noexcept { return geographic::latitude(-90); }
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static constexpr auto lowest() noexcept { return geographic::latitude(-90); }
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static constexpr auto max() noexcept { return geographic::latitude(90); }
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};
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template<>
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class std::numeric_limits<geographic::longitude> : public numeric_limits<geographic::longitude::value_type> {
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static constexpr auto min() noexcept { return geographic::longitude(-180); }
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static constexpr auto lowest() noexcept { return geographic::longitude(-180); }
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static constexpr auto max() noexcept { return geographic::longitude(180); }
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};
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template<>
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struct fmt::formatter<geographic::latitude> : formatter<geographic::latitude::value_type> {
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template<typename FormatContext>
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auto format(geographic::latitude lat, FormatContext& ctx)
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{
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format_to(ctx.out(), lat.value() > 0 ? "N" : "S");
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return formatter<geographic::latitude::value_type>::format(lat.value() > 0 ? lat.value() : -lat.value(), ctx);
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}
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};
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template<>
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struct fmt::formatter<geographic::longitude> : formatter<geographic::longitude::value_type> {
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template<typename FormatContext>
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auto format(geographic::longitude lon, FormatContext& ctx)
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{
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format_to(ctx.out(), lon.value() > 0 ? "E" : "W");
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return formatter<geographic::longitude::value_type>::format(lon.value() > 0 ? lon.value() : -lon.value(), ctx);
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}
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};
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namespace geographic {
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struct horizontal_kind : units::kind<horizontal_kind, units::isq::si::dim_length> {};
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using distance = units::quantity_kind<horizontal_kind, units::isq::si::kilometre>;
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struct position {
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latitude lat;
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longitude lon;
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};
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distance spherical_distance(position from, position to);
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} // namespace geographic
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