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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 committed 2020-09-08 11:02:16 +02:00
1 parent c8b60b80c1
commit 563b358d5e
47 files changed
+599 -422
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src/include/units/bits/dim_unpack.h
+6 -6
View File
@@ -24,7 +24,7 @@
#include <units/bits/derived_dimension_base.h>
#include <units/bits/external/type_list.h>
#include <units/exp.h>
#include <units/exponent.h>
namespace units::detail {
@@ -42,17 +42,17 @@ struct dim_unpack<> {
};
template<BaseDimension Dim, std::intmax_t Num, std::intmax_t Den, Exponent... ERest>
struct dim_unpack<exp<Dim, Num, Den>, ERest...> {
using type = type_list_push_front<typename dim_unpack<ERest...>::type, exp<Dim, Num, Den>>;
struct dim_unpack<exponent<Dim, Num, Den>, ERest...> {
using type = type_list_push_front<typename dim_unpack<ERest...>::type, exponent<Dim, Num, Den>>;
};
template<DerivedDimension Dim, std::intmax_t Num, std::intmax_t Den, Exponent... ERest>
struct dim_unpack<exp<Dim, Num, Den>, ERest...> {
using type = TYPENAME dim_unpack<exp<downcast_base_t<Dim>, Num, Den>, ERest...>::type;
struct dim_unpack<exponent<Dim, Num, Den>, ERest...> {
using type = TYPENAME dim_unpack<exponent<downcast_base_t<Dim>, Num, Den>, ERest...>::type;
};
template<Exponent... Es, std::intmax_t Num, std::intmax_t Den, Exponent... ERest>
struct dim_unpack<exp<derived_dimension_base<Es...>, Num, Den>, ERest...> {
struct dim_unpack<exponent<derived_dimension_base<Es...>, Num, Den>, ERest...> {
using type = type_list_push_front<typename dim_unpack<ERest...>::type, exp_multiply<Es, Num, Den>...>;
};