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coherent_derived_unit and custom prefixes support added

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Mateusz Pusz
2019-10-17 10:16:44 +02:00
parent 9a9abca81d
commit 3e30c779a6
29 changed files with 261 additions and 115 deletions
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src/include/units/format.h
+5 -22
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@@ -26,6 +26,9 @@
namespace units {
template<typename Prefix, typename Ratio>
inline constexpr std::string_view prefix_symbol = "";
namespace detail {
template<typename Ratio, typename CharT, typename Traits>
@@ -41,31 +44,11 @@ namespace units {
}
}
template<typename Ratio>
inline constexpr std::string_view ratio_txt = "";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::atto::den>> = "a";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::femto::den>> = "f";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::pico::den>> = "p";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::nano::den>> = "n";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::micro::den>> = "\u00b5\u0073";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::milli::den>> = "m";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::centi::den>> = "c";
template<> inline constexpr std::string_view ratio_txt<ratio<1, std::deci::den>> = "d";
template<> inline constexpr std::string_view ratio_txt<ratio<std::deca::num>> = "da";
template<> inline constexpr std::string_view ratio_txt<ratio<std::hecto::num>> = "h";
template<> inline constexpr std::string_view ratio_txt<ratio<std::kilo::num>> = "k";
template<> inline constexpr std::string_view ratio_txt<ratio<std::mega::num>> = "M";
template<> inline constexpr std::string_view ratio_txt<ratio<std::giga::num>> = "G";
template<> inline constexpr std::string_view ratio_txt<ratio<std::tera::num>> = "T";
template<> inline constexpr std::string_view ratio_txt<ratio<std::peta::num>> = "P";
template<> inline constexpr std::string_view ratio_txt<ratio<std::exa::num>> = "E";
template<typename Ratio, typename CharT, typename Traits>
template<typename Ratio, typename Prefix, typename CharT, typename Traits>
void print_prefix_or_ratio(std::basic_ostream<CharT, Traits>& os)
{
if constexpr(Ratio::num != 1 || Ratio::den != 1) {
constexpr auto prefix = ratio_txt<Ratio>;
constexpr auto prefix = prefix_symbol<Prefix, Ratio>;
if constexpr(prefix != "") {
// print as a prefixed unit