forked from mpusz/mp-units
Basic std::fmt support added
This commit is contained in:
Mateusz Pusz
@@ -1,155 +0,0 @@
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// 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/dimension.h>
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#include <units/prefix.h>
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#include <ostream>
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#include <string_view>
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namespace units {
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namespace detail {
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template<typename Ratio, typename CharT, typename Traits>
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void print_ratio(std::basic_ostream<CharT, Traits>& os)
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{
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if constexpr(Ratio::num != 1 || Ratio::den != 1) {
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if constexpr(Ratio::den == 1) {
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os << "[" << Ratio::num << "]";
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}
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else {
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os << "[" << Ratio::num << "/" << Ratio::den << "]";
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}
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}
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}
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template<typename Ratio, typename PrefixType, typename CharT, typename Traits>
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void print_prefix_or_ratio(std::basic_ostream<CharT, Traits>& os)
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{
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if constexpr(Ratio::num != 1 || Ratio::den != 1) {
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if(!std::same_as<PrefixType, no_prefix>) {
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using prefix = downcast<detail::prefix_base<PrefixType, Ratio>>;
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if constexpr(!std::same_as<prefix, prefix_base<PrefixType, Ratio>>) {
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// print as a prefixed unit
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os << prefix::symbol;
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return;
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}
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}
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// print as a ratio of the coherent unit
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print_ratio<Ratio>(os);
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}
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}
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template<int Value>
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requires (0 <= Value) && (Value < 10)
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inline constexpr basic_fixed_string superscript_number = "\u2070";
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// template<> inline constexpr basic_fixed_string superscript_number<0> = "\u2070";
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template<> inline constexpr basic_fixed_string superscript_number<1> = "\u00b9";
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template<> inline constexpr basic_fixed_string superscript_number<2> = "\u00b2";
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template<> inline constexpr basic_fixed_string superscript_number<3> = "\u00b3";
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template<> inline constexpr basic_fixed_string superscript_number<4> = "\u2074";
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template<> inline constexpr basic_fixed_string superscript_number<5> = "\u2075";
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template<> inline constexpr basic_fixed_string superscript_number<6> = "\u2076";
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template<> inline constexpr basic_fixed_string superscript_number<7> = "\u2077";
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template<> inline constexpr basic_fixed_string superscript_number<8> = "\u2078";
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template<> inline constexpr basic_fixed_string superscript_number<9> = "\u2079";
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template<int Value>
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requires (Value >= 0)
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constexpr auto superscript()
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{
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if constexpr(Value < 10)
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return superscript_number<Value>;
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else
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return superscript<Value / 10>() + superscript<Value % 10>();
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}
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template<int Value>
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requires (Value >= 0)
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constexpr auto regular()
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{
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if constexpr(Value < 10)
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return basic_fixed_string(static_cast<char>('0' + Value));
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else
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return regular<Value / 10>() + regular<Value % 10>();
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}
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template<bool Divide, std::size_t Idx>
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constexpr auto operator_txt()
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{
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if constexpr(Idx == 0) {
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if constexpr(Divide) {
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return basic_fixed_string("1/");
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}
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else {
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return basic_fixed_string("");
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}
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}
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else {
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if constexpr(Divide) {
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return basic_fixed_string("/");
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}
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else {
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return basic_fixed_string("⋅");
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}
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}
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}
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template<typename E, std::size_t Idx>
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constexpr auto exp_txt()
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{
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// get calculation operator + symbol
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const auto txt = operator_txt<E::num < 0, Idx>() + E::dimension::symbol;
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if constexpr(E::den != 1) {
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// add root part
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return txt + basic_fixed_string("^(") + regular<abs(E::num)>() + basic_fixed_string("/") + regular<E::den>() + basic_fixed_string(")");
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}
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else if constexpr(abs(E::num) != 1) {
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// add exponent part
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return txt + superscript<abs(E::num)>();
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}
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else {
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return txt;
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}
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}
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template<typename... Es, std::size_t... Idxs>
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constexpr auto symbol_text_impl(dimension<Es...>, std::index_sequence<Idxs...>)
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{
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return (exp_txt<Es, Idxs>() + ...);
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}
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template<typename... Es>
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constexpr auto symbol_text(dimension<Es...> d)
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{
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return symbol_text_impl<>(d, std::index_sequence_for<Es...>());
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}
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}
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} // namespace units
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