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Velocity renamed to Speed (resolves #103)

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Mateusz Pusz committed 2020-05-10 17:31:47 +02:00
1 parent f70d6d0be1
commit ce301748dd
42 files changed
+151 -150
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docs/framework/quantities.rst
+9 -9
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@@ -82,14 +82,14 @@ quantities. The usage of such a function can look as follows::
using namespace units::physical::si::literals;
using namespace units::physical::international::literals;
constexpr Velocity auto v1 = avg_speed(220q_km, 2q_h);
constexpr Velocity auto v2 = avg_speed(140q_mi, 2q_h);
constexpr Speed auto v1 = avg_speed(220q_km, 2q_h);
constexpr Speed auto v2 = avg_speed(140q_mi, 2q_h);
In this and all other physical units libraries such a function can be
implemented as::
constexpr si::velocity<si::metre_per_second> avg_speed(si::length<si::metre> d,
si::time<si::second> t)
constexpr si::speed<si::metre_per_second> avg_speed(si::length<si::metre> d,
si::time<si::second> t)
{
return d / t;
}
@@ -114,7 +114,7 @@ are returning a physical quantity of a correct dimension. For this
dimension-specific concepts come handy again and with usage of C++20 generic
functions our function can look as simple as::
constexpr Velocity auto avg_speed(Length auto d, Time auto t)
constexpr Speed auto avg_speed(Length auto d, Time auto t)
{
return d / t;
}
@@ -141,7 +141,7 @@ but often we would like to know a specific type too. We have two options here:
- query the actual dimension, unit, and representation types::
constexpr Velocity auto v = avg_speed(220q_km, 2q_h);
constexpr Speed auto v = avg_speed(220q_km, 2q_h);
using quantity_type = decltype(v);
using dimension_type = quantity_type::dimension;
using unit_type = quantity_type::unit;
@@ -149,9 +149,9 @@ but often we would like to know a specific type too. We have two options here:
- convert or cast to a desired quantity type::
constexpr Velocity auto v1 = avg_speed(220.q_km, 2q_h);
constexpr si::velocity<si::metre_per_second> v2 = v1;
constexpr Velocity auto v3 = quantity_cast<si::velocity<si::metre_per_second>(v1);
constexpr Speed auto v1 = avg_speed(220.q_km, 2q_h);
constexpr si::speed<si::metre_per_second> v2 = v1;
constexpr Speed auto v3 = quantity_cast<si::speed<si::metre_per_second>(v1);
.. seealso::