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refactor: 💥 ratio hidden as an implementation detail behind mag_ratio

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This commit is contained in:
Mateusz Pusz
2024-04-19 15:29:00 +01:00
parent ae1003b279
commit f90a218705
24 changed files with 126 additions and 129 deletions
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8
docs/users_guide/framework_basics/dimensionless_quantities.md
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@@ -114,7 +114,7 @@ units of _length_:
```cpp
inline constexpr struct hubble_constant :
named_unit<{u8"H₀", "H_0"}, mag<ratio{701, 10}> * si::kilo<si::metre> / si::second / si::mega<parsec>> {} hubble_constant;
named_unit<{u8"H₀", "H_0"}, mag_ratio<701, 10> * si::kilo<si::metre> / si::second / si::mega<parsec>> {} hubble_constant;
```
@@ -158,9 +158,9 @@ Besides the unit `one`, there are a few other scaled units predefined in the lib
with dimensionless quantities:
```cpp
inline constexpr struct percent : named_unit<"%", mag<ratio{1, 100}> * one> {} percent;
inline constexpr struct per_mille : named_unit<{u8"‰", "%o"}, mag<ratio(1, 1000)> * one> {} per_mille;
inline constexpr struct parts_per_million : named_unit<"ppm", mag<ratio(1, 1'000'000)> * one> {} parts_per_million;
inline constexpr struct percent : named_unit<"%", mag_ratio<1, 100> * one> {} percent;
inline constexpr struct per_mille : named_unit<{u8"‰", "%o"}, mag_ratio<1, 1000> * one> {} per_mille;
inline constexpr struct parts_per_million : named_unit<"ppm", mag_ratio<1, 1'000'000> * one> {} parts_per_million;
inline constexpr auto ppm = parts_per_million;
```

4
docs/users_guide/framework_basics/systems_of_units.md
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@@ -170,14 +170,14 @@ electronvolt:
```cpp
inline constexpr struct minute : named_unit<"min", mag<60> * si::second> {} minute;
inline constexpr struct hour : named_unit<"h", mag<60> * minute> {} hour;
inline constexpr struct electronvolt : named_unit<"eV", mag<ratio{1'602'176'634, 1'000'000'000}> * mag_power<10, -19> * si::joule> {} electronvolt;
inline constexpr struct electronvolt : named_unit<"eV", mag_ratio<1'602'176'634, 1'000'000'000> * mag_power<10, -19> * si::joule> {} electronvolt;
```
Also, units of other [systems of units](../../appendix/glossary.md#system-of-units) are often defined
in terms of scaled versions of the SI units. For example, the international yard is defined as:
```cpp
inline constexpr struct yard : named_unit<"yd", mag<ratio{9'144, 10'000}> * si::metre> {} yard;
inline constexpr struct yard : named_unit<"yd", mag_ratio<9'144, 10'000> * si::metre> {} yard;
```
For some units, a magnitude might also be irrational. The best example here is a `degree` which

8
docs/users_guide/framework_basics/text_output.md
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@@ -77,10 +77,10 @@ and units of derived quantities.
```cpp
inline constexpr struct hyperfine_structure_transition_frequency_of_cs : named_unit<{u8"Δν_Cs", "dv_Cs"}, mag<9'192'631'770> * hertz> {} hyperfine_structure_transition_frequency_of_cs;
inline constexpr struct speed_of_light_in_vacuum : named_unit<"c", mag<299'792'458> * metre / second> {} speed_of_light_in_vacuum;
inline constexpr struct planck_constant : named_unit<"h", mag<ratio{662'607'015, 100'000'000}> * mag_power<10, -34> * joule * second> {} planck_constant;
inline constexpr struct elementary_charge : named_unit<"e", mag<ratio{1'602'176'634, 1'000'000'000}> * mag_power<10, -19> * coulomb> {} elementary_charge;
inline constexpr struct boltzmann_constant : named_unit<"k", mag<ratio{1'380'649, 1'000'000}> * mag_power<10, -23> * joule / kelvin> {} boltzmann_constant;
inline constexpr struct avogadro_constant : named_unit<"N_A", mag<ratio{602'214'076, 100'000'000}> * mag_power<10, 23> / mole> {} avogadro_constant;
inline constexpr struct planck_constant : named_unit<"h", mag_ratio<662'607'015, 100'000'000> * mag_power<10, -34> * joule * second> {} planck_constant;
inline constexpr struct elementary_charge : named_unit<"e", mag_ratio<1'602'176'634, 1'000'000'000> * mag_power<10, -19> * coulomb> {} elementary_charge;
inline constexpr struct boltzmann_constant : named_unit<"k", mag_ratio<1'380'649, 1'000'000> * mag_power<10, -23> * joule / kelvin> {} boltzmann_constant;
inline constexpr struct avogadro_constant : named_unit<"N_A", mag_ratio<602'214'076, 100'000'000> * mag_power<10, 23> / mole> {} avogadro_constant;
inline constexpr struct luminous_efficacy : named_unit<"K_cd", mag<683> * lumen / watt> {} luminous_efficacy;
```

4
docs/users_guide/framework_basics/the_affine_space.md
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@@ -403,7 +403,7 @@ inline constexpr struct zeroth_degree_Celsius : decltype(ice_point) {} zeroth_de
namespace usc {
inline constexpr struct zeroth_degree_Fahrenheit :
relative_point_origin<si::zeroth_degree_Celsius - 32 * (mag<ratio{5, 9}> * si::degree_Celsius)> {} zeroth_degree_Fahrenheit;
relative_point_origin<si::zeroth_degree_Celsius - 32 * (mag_ratio<5, 9> * si::degree_Celsius)> {} zeroth_degree_Fahrenheit;
}
```
@@ -436,7 +436,7 @@ inline constexpr struct degree_Celsius :
namespace usc {
inline constexpr struct degree_Fahrenheit :
named_unit<{u8"°F", "`F"}, mag<ratio{5, 9}> * si::degree_Celsius,
named_unit<{u8"°F", "`F"}, mag_ratio<5, 9> * si::degree_Celsius,
zeroth_degree_Fahrenheit> {} degree_Fahrenheit;
}