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refactor: UDLs support switched off by default

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Mateusz Pusz
2021-04-02 18:56:28 +02:00
parent 5fc7e01d19
commit 1a5b4fc85e
17 changed files with 144 additions and 142 deletions
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72
example/clcpp_response.cpp
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@ -29,55 +29,54 @@
namespace {
using namespace units;
void simple_quantities()
{
using namespace units::isq::si;
using namespace units::isq::si::international;
using namespace units::isq;
using namespace units::isq::si::references;
using namespace units::isq::si::international::references;
using distance = length<metre>;
using duration = isq::si::time<second>;
using distance = si::length<si::metre>;
using duration = si::time<si::second>;
constexpr distance km = 1.0_q_km;
constexpr distance miles = 1.0_q_mi;
constexpr distance kilometers = 1.0 * km;
constexpr distance miles = 1.0 * mi;
constexpr duration sec = 1_q_s;
constexpr duration min = 1_q_min;
constexpr duration hr = 1_q_h;
constexpr duration seconds = 1 * s;
constexpr duration minutes = 1 * min;
constexpr duration hours = 1 * h;
std::cout << "A physical quantities library can choose the simple\n";
std::cout << "option to provide output using a single type for each base unit:\n\n";
std::cout << km << '\n';
std::cout << kilometers << '\n';
std::cout << miles << '\n';
std::cout << sec << '\n';
std::cout << min << '\n';
std::cout << hr << "\n\n";
std::cout << seconds << '\n';
std::cout << minutes << '\n';
std::cout << hours << "\n\n";
}
void quantities_with_typed_units()
{
using namespace units::isq;
using namespace units::isq::si;
using namespace units::isq::si::international;
using namespace units::isq::si::references;
using namespace units::isq::si::international::references;
constexpr length<kilometre> km = 1.0_q_km;
constexpr length<mile> miles = 1.0_q_mi;
constexpr si::length<si::kilometre> kilometers = 1.0 * km;
constexpr si::length<si::international::mile> miles = 1.0 * mi;
std::cout.precision(6);
constexpr si::time<second> sec = 1_q_s;
constexpr si::time<minute> min = 1_q_min;
constexpr si::time<hour> hr = 1_q_h;
constexpr si::time<si::second> seconds = 1 * s;
constexpr si::time<si::minute> minutes = 1 * min;
constexpr si::time<si::hour> hours = 1 * h;
std::cout << "A more flexible option is to provide separate types for each unit,\n\n";
std::cout << km << '\n';
std::cout << kilometers << '\n';
std::cout << miles << '\n';
std::cout << sec << '\n';
std::cout << min << '\n';
std::cout << hr << "\n\n";
std::cout << seconds << '\n';
std::cout << minutes << '\n';
std::cout << hours << "\n\n";
constexpr length<metre> meter = 1_q_m;
constexpr si::length<si::metre> meter = 1 * m;
std::cout << "then a wide range of pre-defined units can be defined and converted,\n"
" for consistency and repeatability across applications:\n\n";
@ -105,34 +104,35 @@ void quantities_with_typed_units()
void calcs_comparison()
{
using namespace units::isq::si;
using namespace units::isq;
using namespace units::isq::si::references;
std::cout << "\nA distinct unit for each type is efficient and accurate\n"
"when adding two values of the same very big\n"
"or very small type:\n\n";
length<femtometre, float> L1A = 2._q_fm;
length<femtometre, float> L2A = 3._q_fm;
length<femtometre, float> LrA = L1A + L2A;
si::length<si::femtometre, float> L1A = 2. * fm;
si::length<si::femtometre, float> L2A = 3. * fm;
si::length<si::femtometre, float> LrA = L1A + L2A;
fmt::print("{:%.30Q %q}\n + {:%.30Q %q}\n = {:%.30Q %q}\n\n", L1A, L2A, LrA);
std::cout << "The single unit method must convert large\n"
"or small values in other units to the base unit.\n"
"This is both inefficient and inaccurate\n\n";
length<metre, float> L1B = L1A;
length<metre, float> L2B = L2A;
length<metre, float> LrB = L1B + L2B;
si::length<si::metre, float> L1B = L1A;
si::length<si::metre, float> L2B = L2A;
si::length<si::metre, float> LrB = L1B + L2B;
fmt::print("{:%.30Q %q}\n + {:%.30Q %q}\n = {:%.30Q %q}\n\n", L1B, L2B, LrB);
std::cout << "In multiplication and division:\n\n";
area<square_femtometre, float> ArA = L1A * L2A;
si::area<si::square_femtometre, float> ArA = L1A * L2A;
fmt::print("{:%.30Q %q}\n * {:%.30Q %q}\n = {:%.30Q %q}\n\n", L1A, L2A, ArA);
std::cout << "similar problems arise\n\n";
area<square_metre, float> ArB = L1B * L2B;
si::area<si::square_metre, float> ArB = L1B * L2B;
fmt::print("{:%.30Q %q}\n * {:%.30Q %q}\n = {:%.30Q %q}\n\n", L1B, L2B, ArB);
}