47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
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#include "okapi/api/units/QAngle.hpp"
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#include "okapi/api/units/QLength.hpp"
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#include "okapi/api/units/QSpeed.hpp"
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#include <stdexcept>
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#include <typeindex>
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#include <unordered_map>
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#pragma once
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namespace okapi {
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/**
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* Returns a short name for a unit.
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* For example: `str(1_ft)` will return "ft", so will `1 * foot` or `0.3048_m`.
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* Throws std::domain_error when `q` is a unit not defined in this function.
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*
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* @param q Your unit. Currently only QLength and QAngle are supported.
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* @return The short string suffix for that unit.
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*/
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template <class QType> std::string getShortUnitName(QType q) {
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const std::unordered_map<std::type_index, std::unordered_map<double, const char *>> shortNameMap =
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{{typeid(meter),
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{
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{meter.getValue(), "m"},
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{decimeter.getValue(), "dm"},
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{centimeter.getValue(), "cm"},
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{millimeter.getValue(), "mm"},
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{kilometer.getValue(), "km"},
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{inch.getValue(), "in"},
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{foot.getValue(), "ft"},
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{yard.getValue(), "yd"},
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{mile.getValue(), "mi"},
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{tile.getValue(), "tile"},
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}},
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{typeid(degree), {{degree.getValue(), "deg"}, {radian.getValue(), "rad"}}}};
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try {
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return shortNameMap.at(typeid(q)).at(q.getValue());
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} catch (const std::out_of_range &e) {
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throw std::domain_error(
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"You have requested the shortname of an unknown unit somewhere (likely odometry strings). "
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"Shortname for provided unit is unspecified. You can override this function to add more "
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"names or manually specify the name instead.");
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}
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}
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} // namespace okapi
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