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refactor: conversion_factor example moved to the main examples directory

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Mateusz Pusz
2021-04-07 19:05:02 +02:00
parent fdc31e7cde
commit dddc7572aa
6 changed files with 12 additions and 69 deletions
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2
docs/examples/conversion_factor.rst
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@ -1,7 +1,7 @@
conversion_factor
=================
.. literalinclude:: ../../example/references/conversion_factor.cpp
.. literalinclude:: ../../example/conversion_factor.cpp
:caption: conversion_factor.cpp
:start-at: #include
:linenos:

14
example/CMakeLists.txt
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@ -22,11 +22,17 @@
cmake_minimum_required(VERSION 3.2)
add_executable(hello_units hello_units.cpp)
target_link_libraries(hello_units PRIVATE mp-units::core-fmt mp-units::core-io mp-units::si mp-units::si-international)
#
# add_example(target <depependencies>...)
#
function(add_example target)
add_executable(${target} ${target}.cpp)
target_link_libraries(${target} PRIVATE ${ARGN})
endfunction()
add_executable(custom_systems custom_systems.cpp)
target_link_libraries(custom_systems PRIVATE mp-units::core-io mp-units::si)
add_example(conversion_factor mp-units::core-fmt mp-units::core-io mp-units::si)
add_example(custom_systems mp-units::core-io mp-units::si)
add_example(hello_units mp-units::core-fmt mp-units::core-io mp-units::si mp-units::si-international)
if(NOT UNITS_LIBCXX)
add_subdirectory(glide_computer)

2
example/literals/conversion_factor.cpp → example/conversion_factor.cpp
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@ -46,7 +46,7 @@ int main()
std::cout << "conversion factor in mp-units...\n\n";
constexpr length<metre> lengthA = 2.0_q_m;
constexpr length<metre> lengthA(2.0);
constexpr length<millimetre> lengthB = lengthA;
std::cout << fmt::format("lengthA( {} ) and lengthB( {} )\n", lengthA, lengthB)

1
example/literals/CMakeLists.txt
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@ -35,7 +35,6 @@ add_example(avg_speed mp-units::core-io mp-units::si mp-units::si-cgs mp-units::
add_example(box_example mp-units::core-fmt mp-units::si)
add_example(capacitor_time_curve mp-units::core-io mp-units::si)
add_example(clcpp_response mp-units::core-fmt mp-units::core-io mp-units::si mp-units::si-iau mp-units::si-imperial mp-units::si-international mp-units::si-typographic mp-units::si-us)
add_example(conversion_factor mp-units::core-fmt mp-units::core-io mp-units::si)
add_example(experimental_angle mp-units::core-fmt mp-units::core-io mp-units::si)
add_example(foot_pound_second mp-units::core-fmt mp-units::si-fps)
add_example(kalman_filter-alpha_beta_filter_example2 mp-units::core-fmt mp-units::si)

1
example/references/CMakeLists.txt
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@ -35,7 +35,6 @@ add_example(avg_speed mp-units::core-io mp-units::si mp-units::si-cgs mp-units::
add_example(box_example mp-units::core-fmt mp-units::si)
add_example(capacitor_time_curve mp-units::core-io mp-units::si)
add_example(clcpp_response mp-units::core-fmt mp-units::core-io mp-units::si mp-units::si-iau mp-units::si-imperial mp-units::si-international mp-units::si-typographic mp-units::si-us)
add_example(conversion_factor mp-units::core-fmt mp-units::core-io mp-units::si)
add_example(experimental_angle mp-units::core-fmt mp-units::core-io mp-units::si)
add_example(foot_pound_second mp-units::core-fmt mp-units::si-fps)
add_example(kalman_filter-alpha_beta_filter_example2 mp-units::core-fmt mp-units::si)

61
example/references/conversion_factor.cpp
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@ -1,61 +0,0 @@
/*
Copyright (c) 2003-2020 Andy Little.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses./
*/
#include <units/format.h>
#include <units/isq/si/length.h>
#include <iostream>
#include <type_traits>
/*
get conversion factor from one dimensionally equivalent
quantity type to another
*/
namespace {
template<units::Quantity Target, units::Quantity Source>
requires units::equivalent<typename Source::dimension, typename Target::dimension>
inline constexpr std::common_type_t<typename Target::rep, typename Source::rep> conversion_factor(Target, Source)
{
// get quantities looking like inputs but with Q::rep that doesn't have narrowing conversion
typedef std::common_type_t<typename Target::rep, typename Source::rep> rep;
typedef units::quantity<typename Source::dimension, typename Source::unit, rep> source;
typedef units::quantity<typename Target::dimension, typename Target::unit, rep> target;
return target{source{1}}.number();
}
} // namespace
int main()
{
using namespace units::isq::si;
using namespace units::isq::si::references;
std::cout << "conversion factor in mp-units...\n\n";
constexpr auto lengthA = 2.0 * m;
constexpr auto lengthB = quantity_cast<millimetre>(lengthA);
std::cout << fmt::format("lengthA( {} ) and lengthB( {} )\n", lengthA, lengthB)
<< "represent the same length in different units.\n\n";
std::cout << fmt::format("therefore ratio lengthA / lengthB == {}\n\n", lengthA / lengthB);
std::cout << fmt::format("conversion factor from lengthA::unit of {:%q} to lengthB::unit of {:%q}:\n\n", lengthA, lengthB)
<< fmt::format("lengthB.number( {} ) == lengthA.number( {} ) * conversion_factor( {} )\n",
lengthB.number(), lengthA.number(), conversion_factor(lengthB, lengthA));
}