Function getLengthDependentUnit

source/MRViewer/MRUnitSettings.cpp:84–153

}

static auto getLengthDependentUnit()
{
    return overloaded{
        // All length-related unit types must be listed here.
        [] <std::same_as<LengthUnit>>( LengthUnit unit )
        {
            return unit;
        },
        []<std::same_as<AreaUnit>>( LengthUnit unit )
        {
            switch ( unit )
            {
                case LengthUnit::microns:     return AreaUnit::microns2;
                case LengthUnit::millimeters: return AreaUnit::millimeters2;
                case LengthUnit::centimeters: return AreaUnit::centimeters2;
                case LengthUnit::meters:      return AreaUnit::meters2;
                case LengthUnit::inches:      return AreaUnit::inches2;
                case LengthUnit::feet:        return AreaUnit::feet2;
                case LengthUnit::_count:; // MSVC warns otherwise.
            }
            assert( false );
            return AreaUnit::millimeters2;
        },
        []<std::same_as<VolumeUnit>>( LengthUnit unit )
        {
            switch ( unit )
            {
                case LengthUnit::microns:     return VolumeUnit::microns3;
                case LengthUnit::millimeters: return VolumeUnit::millimeters3;
                case LengthUnit::centimeters: return VolumeUnit::centimeters3;
                case LengthUnit::meters:      return VolumeUnit::meters3;
                case LengthUnit::inches:      return VolumeUnit::inches3;
                case LengthUnit::feet:        return VolumeUnit::feet3;
                case LengthUnit::_count:; // MSVC warns otherwise.
            }
            assert( false );
            return VolumeUnit::millimeters3;
        },
        []<std::same_as<MovementSpeedUnit>>( LengthUnit unit )
        {
            switch ( unit )
            {
                case LengthUnit::microns:     return MovementSpeedUnit::micronsPerSecond;
                case LengthUnit::millimeters: return MovementSpeedUnit::millimetersPerSecond;
                case LengthUnit::centimeters: return MovementSpeedUnit::centimetersPerSecond;
                case LengthUnit::meters:      return MovementSpeedUnit::metersPerSecond;
                case LengthUnit::inches:      return MovementSpeedUnit::inchesPerSecond;
                case LengthUnit::feet:        return MovementSpeedUnit::feetPerSecond;
                case LengthUnit::_count:; // MSVC warns otherwise.
            }
            assert( false );
            return MovementSpeedUnit::millimetersPerSecond;
        },
        []<std::same_as<InvLengthUnit>>( LengthUnit unit )
        {
            switch ( unit )
            {
                case LengthUnit::microns:     return InvLengthUnit::inv_microns;