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feat!: 💥 dimensionless quantities refactored

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Dimensionless quantities are now represented by quantity types rather
than by plain representation types. Only dimensionless quantities with
`unitless` unit are implicitly convertible from representation types.

`units::exp()` now is a function doing std::exp() on a representation
type (previous `units::exp` class template was renamed to
`units::exponent`).

BREAKING_CHANGE: gcc-9.3 support removed
BREAKING_CHANGE: `exp` and `Exp` renamed to `exponent` and `Exponent`
Resolves #27
Resolves #42
This commit is contained in:
Mateusz Pusz
2020-09-08 11:02:16 +02:00
parent c8b60b80c1
commit 563b358d5e
47 changed files with 599 additions and 422 deletions
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test/unit_test/static/quantity_test.cpp
+51 -7
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@@ -161,21 +161,21 @@ static_assert(
static_assert(
is_same_v<decltype(speed<metre_per_second, int>() * physical::si::time<hour, int>()), length<scaled_unit<ratio(36, 1, 2), metre>, int>>);
static_assert(is_same_v<decltype(length<metre>() * physical::si::time<minute>()),
quantity<unknown_dimension<units::exp<dim_length, 1>, units::exp<dim_time, 1>>, scaled_unit<ratio(6, 1, 1), unknown_coherent_unit>>>);
quantity<unknown_dimension<units::exponent<dim_length, 1>, units::exponent<dim_time, 1>>, scaled_unit<ratio(6, 1, 1), unknown_coherent_unit>>>);
static_assert(is_same_v<decltype(1 / physical::si::time<second, int>()), frequency<hertz, int>>);
static_assert(is_same_v<decltype(1 / physical::si::time<minute, int>()), frequency<scaled_unit<ratio(1, 6, -1), hertz>, int>>);
static_assert(is_same_v<decltype(1 / frequency<hertz, int>()), physical::si::time<second, int>>);
static_assert(is_same_v<decltype(1 / length<kilometre>()),
quantity<unknown_dimension<units::exp<dim_length, -1>>, scaled_unit<ratio(1, 1, -3), unknown_coherent_unit>>>);
quantity<unknown_dimension<units::exponent<dim_length, -1>>, scaled_unit<ratio(1, 1, -3), unknown_coherent_unit>>>);
static_assert(is_same_v<decltype(length<metre, int>() / 1.0), length<metre, double>>);
static_assert(is_same_v<decltype(length<metre, int>() / length<metre, double>()), double>);
static_assert(is_same_v<decltype(length<kilometre, int>() / length<metre, double>()), double>);
static_assert(is_same_v<decltype(length<metre, int>() / length<metre, double>()), dimensionless<unitless, double>>);
static_assert(is_same_v<decltype(length<kilometre, int>() / length<metre, double>()), dimensionless<scaled_unit<ratio(1, 1, 3), unitless>, double>>);
static_assert(
is_same_v<decltype(length<metre, int>() / physical::si::time<second, int>()), speed<metre_per_second, int>>);
static_assert(
is_same_v<decltype(length<metre>() / physical::si::time<minute>()), speed<scaled_unit<ratio(1, 6, -1), metre_per_second>>>);
static_assert(is_same_v<decltype(physical::si::time<minute>() / length<metre>()),
quantity<unknown_dimension<units::exp<dim_length, -1>, units::exp<dim_time, 1>>, scaled_unit<ratio(6 ,1 , 1), unknown_coherent_unit>>>);
quantity<unknown_dimension<units::exponent<dim_length, -1>, units::exponent<dim_time, 1>>, scaled_unit<ratio(6 ,1 , 1), unknown_coherent_unit>>>);
static_assert(is_same_v<decltype(length<metre, int>() % short(1)), length<metre, int>>);
static_assert(is_same_v<decltype(length<metre, int>() % length<metre, short>(1)), length<metre, int>>);
@@ -186,14 +186,27 @@ static_assert((1q_km - 1q_m).count() == 999);
static_assert((2q_m * 2).count() == 4);
static_assert((3 * 3q_m).count() == 9);
static_assert((4q_m / 2).count() == 2);
static_assert(4q_m / 2q_m == 2);
static_assert(4q_km / 2000q_m == 2);
static_assert((4q_km / 2q_m).count() == 2);
static_assert((4000q_m / 2q_m).count() == 2000);
static_assert((7q_m % 2).count() == 1);
static_assert((7q_m % 2q_m).count() == 1);
static_assert((7q_km % 2000q_m).count() == 1000);
static_assert((10q_km2 * 10q_km2) / 50q_km2 == 2q_km2);
constexpr auto q1 = 10q_km / 5q_m;
static_assert(std::is_same_v<decltype(q1), const dimensionless<scaled_unit<ratio(1, 1, 3), unitless>, std::int64_t>>);
static_assert(q1.count() == 2);
constexpr dimensionless<unitless> q2 = q1;
static_assert(q2.count() == 2000);
static_assert(quantity_cast<unitless>(q1).count() == 2000);
constexpr auto q3 = 10q_s * 2q_kHz;
static_assert(std::is_same_v<decltype(q3), const dimensionless<scaled_unit<ratio(1, 1, 3), unitless>, std::int64_t>>);
static_assert(q3.count() == 20);
// comparators
static_assert(2q_m + 1q_m == 3q_m);
@@ -264,6 +277,37 @@ static_assert(quantity_cast<metre>(2q_km).count() == 2000);
static_assert(quantity_cast<kilometre>(2000q_m).count() == 2);
static_assert(quantity_cast<int>(1.23q_m).count() == 1);
// dimensionless
static_assert(std::is_convertible_v<double, dimensionless<unitless>>);
static_assert(std::is_convertible_v<float, dimensionless<unitless>>);
static_assert(!std::is_convertible_v<double, dimensionless<unitless, int>>);
static_assert(std::is_convertible_v<int, dimensionless<unitless>>);
static_assert(!std::is_convertible_v<double, dimensionless<scaled_unit<ratio(1, 1, 1), unitless>>>);
static_assert(std::is_constructible_v<dimensionless<scaled_unit<ratio(1, 1, 1), unitless>>, double>);
static_assert(dimensionless<unitless>(1.23) + dimensionless<unitless>(1.23) == dimensionless<unitless>(2.46));
static_assert(dimensionless<unitless>(1.23) + dimensionless<unitless>(1.23) == 2.46);
static_assert(dimensionless<unitless>(1.23) + 1.23 == 2.46);
static_assert(1.23 + dimensionless<unitless>(1.23) == 2.46);
static_assert(dimensionless<unitless>(1) + 1 == 2);
static_assert(dimensionless<unitless, int>(1) + 1 == 2);
template<typename Rep>
concept invalid_dimensionless_operation = requires()
{
!requires(dimensionless<unitless, Rep> d) { d + 1.23; };
!requires(dimensionless<unitless, Rep> d) { 1.23 + d; };
!requires(dimensionless<scaled_unit<ratio(1, 1, 1), unitless>, Rep> d) { 1 + d; };
!requires(dimensionless<scaled_unit<ratio(1, 1, 1), unitless>, Rep> d) { d + 1; };
};
static_assert(invalid_dimensionless_operation<int>);
static_assert(quantity_cast<percent>(50.q_m / 100.q_m).count() == 50);
static_assert(50.q_m / 100.q_m == dimensionless<percent>(50));
// time
static_assert(1q_h == 3600q_s);