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refactor: References are now guarded UNITS_REFERENCES with (ON by default) + examples duplicated to subdirectories

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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.
This commit is contained in:
Mateusz Pusz
2021-04-06 15:57:28 +02:00
parent b842c3f94a
commit b982921d27
118 changed files with 2841 additions and 71 deletions
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102
example/foot_pound_second.cpp
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@ -1,102 +0,0 @@
// The MIT License (MIT)
//
// Copyright (c) 2018 Mateusz Pusz
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <units/format.h>
#include <units/isq/si/fps/density.h> // IWYU pragma: keep
#include <units/isq/si/fps/length.h>
#include <units/isq/si/fps/mass.h>
#include <units/isq/si/fps/power.h>
#include <units/isq/si/fps/speed.h>
#include <units/isq/si/fps/volume.h>
#include <units/isq/si/length.h>
#include <units/isq/si/mass.h>
#include <units/isq/si/power.h>
#include <units/isq/si/speed.h>
#include <units/isq/si/time.h>
#include <units/isq/si/volume.h>
#include <iostream>
#include <string_view>
using namespace units::isq;
// Some basic specs for the warship
struct Ship {
si::fps::length<si::fps::foot> length;
si::fps::length<si::fps::foot> draft;
si::fps::length<si::fps::foot> beam;
si::fps::speed<si::fps::foot_per_second> speed;
si::fps::mass<si::fps::pound> mass;
si::fps::length<si::fps::inch> mainGuns;
si::fps::mass<si::fps::pound> shellMass;
si::fps::speed<si::fps::foot_per_second> shellSpeed;
si::fps::power<si::fps::foot_poundal_per_second> power;
};
// Print 'a' in its current units and print its value cast to the units in each of Args
template<class ...Args, units::Quantity Q>
auto fmt_line(const Q a)
{
return fmt::format("{:22}", a) + (fmt::format(",{:20}", units::quantity_cast<Args>(a)) + ...);
}
// Print the ship details in the units as defined in the Ship struct, in other si::imperial units, and in SI
void print_details(std::string_view description, const Ship& ship)
{
using namespace units::isq::si::fps::references;
const auto waterDensity = 62.4 * (lb / ft3);
std::cout << fmt::format("{}\n", description);
std::cout << fmt::format("{:20} : {}\n", "length", fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.length))
<< fmt::format("{:20} : {}\n", "draft", fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.draft))
<< fmt::format("{:20} : {}\n", "beam", fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.beam))
<< fmt::format("{:20} : {}\n", "mass", fmt_line<si::fps::mass<si::fps::long_ton>, si::mass<si::tonne>>(ship.mass))
<< fmt::format("{:20} : {}\n", "speed", fmt_line<si::fps::speed<si::fps::knot>, si::speed<si::kilometre_per_hour>>(ship.speed))
<< fmt::format("{:20} : {}\n", "power", fmt_line<si::fps::power<si::fps::horse_power>, si::power<si::kilowatt>>(ship.power))
<< fmt::format("{:20} : {}\n", "main guns", fmt_line<si::fps::length<si::fps::inch>, si::length<si::millimetre>>(ship.mainGuns))
<< fmt::format("{:20} : {}\n", "fire shells weighing",fmt_line<si::fps::mass<si::fps::long_ton>, si::mass<si::kilogram>>(ship.shellMass))
<< fmt::format("{:20} : {}\n", "fire shells at",fmt_line<si::fps::speed<si::fps::mile_per_hour>, si::speed<si::kilometre_per_hour>>(ship.shellSpeed))
<< fmt::format("{:20} : {}\n", "volume underwater", fmt_line<si::volume<si::cubic_metre>, si::volume<si::litre>>(ship.mass / waterDensity));
}
int main()
{
using namespace units::isq::si::references;
using namespace units::isq::si::fps::references;
using units::isq::si::fps::references::ft; // collides with si::femtotonne (alias unit of mass)
// KMS Bismark, using the units the Germans would use, taken from Wiki
auto bismark = Ship{.length{251. * m}, .draft{9.3 * m}, .beam{36 * m}, .speed{56 * (km / h)}, .mass{50'300 * t}, .mainGuns{380 * mm}, .shellMass{800 * kg}, .shellSpeed{820. * (m / s)}, .power{110.45 * kW}};
// USS Iowa, using units from the foot-pound-second system
auto iowa = Ship{.length{860. * ft}, .draft{37. * ft + 2. * in}, .beam{108. * ft + 2. * in}, .speed{33 * knot}, .mass{57'540 * lton}, .mainGuns{16 * in}, .shellMass{2700 * lb}, .shellSpeed{2690. * (ft / s)}, .power{212'000 * hp}};
// HMS King George V, using units from the foot-pound-second system
auto kgv = Ship{.length{745.1 * ft}, .draft{33. * ft + 7.5 * in}, .beam{103.2 * ft + 2.5 * in}, .speed{28.3 * knot}, .mass{42'245 * lton}, .mainGuns{14 * in}, .shellMass{1'590 * lb}, .shellSpeed{2483. * (ft / s)}, .power{110'000 * hp}};
print_details("KMS Bismark, defined in appropriate units from the SI system", bismark);
std::cout << "\n\n";
print_details("USS Iowa, defined in appropriate units foot-pound-second system", iowa);
std::cout << "\n\n";
print_details("HMS King George V, defined in appropriate units foot-pound-second system", kgv);
}