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refactor: example applications refactored to benefit more from references

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Mateusz Pusz
2021-04-07 13:56:20 +02:00
parent 40de14b9b7
commit fdc31e7cde
5 changed files with 50 additions and 45 deletions
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28
example/references/clcpp_response.cpp
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@@ -60,14 +60,14 @@ void quantities_with_typed_units()
using namespace units::isq::si::references;
using namespace units::isq::si::international::references;
constexpr si::length<si::kilometre> kilometers = 1.0 * km;
constexpr si::length<si::international::mile> miles = 1.0 * mi;
constexpr auto kilometers = 1.0 * km;
constexpr auto miles = 1.0 * mi;
std::cout.precision(6);
constexpr si::time<si::second> seconds = 1 * s;
constexpr si::time<si::minute> minutes = 1 * min;
constexpr si::time<si::hour> hours = 1 * h;
constexpr auto seconds = 1 * s;
constexpr auto minutes = 1 * min;
constexpr auto hours = 1 * h;
std::cout << "A more flexible option is to provide separate types for each unit,\n\n";
std::cout << kilometers << '\n';
@@ -76,7 +76,7 @@ void quantities_with_typed_units()
std::cout << minutes << '\n';
std::cout << hours << "\n\n";
constexpr si::length<si::metre> meter = 1 * m;
constexpr auto 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";
@@ -111,28 +111,28 @@ void calcs_comparison()
"when adding two values of the same very big\n"
"or very small type:\n\n";
si::length<si::femtometre, float> L1A = 2. * fm;
si::length<si::femtometre, float> L2A = 3. * fm;
si::length<si::femtometre, float> LrA = L1A + L2A;
const auto L1A = 2.f * fm;
const auto L2A = 3.f * fm;
const Length auto 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";
si::length<si::metre, float> L1B = L1A;
si::length<si::metre, float> L2B = L2A;
si::length<si::metre, float> LrB = L1B + L2B;
const auto L1B = quantity_cast<si::metre>(L1A);
const auto L2B = quantity_cast<si::metre>(L2A);
const Length auto 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";
si::area<si::square_femtometre, float> ArA = L1A * L2A;
const Area auto 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";
si::area<si::square_metre, float> ArB = L1B * L2B;
const Area auto ArB = L1B * L2B;
fmt::print("{:%.30Q %q}\n * {:%.30Q %q}\n = {:%.30Q %q}\n\n", L1B, L2B, ArB);
}