feedc0de/mp-units
1
0
Fork 0
forked from mpusz/mp-units
Code Pull Requests Activity

docs: basic examples refactored to not use auto

Browse Source
This commit is contained in:
Mateusz Pusz
2023-09-13 08:58:17 +02:00
parent cbcc6f4627
commit 9d64b75afe
3 changed files with 25 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
docs/getting_started/code_example.md
View File

@@ -5,6 +5,7 @@ Here is a small example of operations possible on scalar quantities:
```cpp
#include <mp-units/systems/si/si.h>
using namespace mp_units;
using namespace mp_units::si::unit_symbols;
// simple numeric operations
@@ -14,7 +15,7 @@ static_assert(10 * km / 2 == 5 * km);
static_assert(1 * h == 3600 * s);
static_assert(1 * km + 1 * m == 1001 * m);
// dimension conversions
// derived quantities
inline constexpr auto kmph = km / h;
static_assert(1 * km / (1 * s) == 1000 * (m / s));
static_assert(2 * kmph * (2 * h) == 4 * km);
@@ -22,12 +23,12 @@ static_assert(2 * km / (2 * kmph) == 1 * h);
static_assert(2 * m * (3 * m) == 6 * m2);
static_assert(10 * km / (5 * km) == 2);
static_assert(10 * km / (5 * km) == 2 * one);
static_assert(1000 / (1 * s) == 1 * kHz);
```
!!! example "[Try it on Compiler Explorer](https://godbolt.org/z/j8afKnarv)"
!!! example "[Try it on Compiler Explorer](https://godbolt.org/z/81Ev7qhTd)"
This library requires some C++20 features ([concepts and constraints](https://en.cppreference.com/w/cpp/language/constraints),
@@ -58,13 +59,13 @@ int main()
using namespace mp_units::si::unit_symbols;
using namespace mp_units::international::unit_symbols;
constexpr auto v1 = 110 * (km / h);
constexpr auto v2 = 70 * mph;
constexpr auto v3 = avg_speed(220. * isq::distance[km], 2 * h);
constexpr auto v4 = avg_speed(isq::distance(140. * mi), 2 * h);
constexpr auto v5 = v3.in(m / s);
constexpr auto v6 = value_cast<m / s>(v4);
constexpr auto v7 = value_cast<int>(v6);
constexpr quantity v1 = 110 * (km / h);
constexpr quantity v2 = 70 * mph;
constexpr quantity v3 = avg_speed(220. * isq::distance[km], 2 * h);
constexpr quantity v4 = avg_speed(isq::distance(140. * mi), 2 * h);
constexpr quantity v5 = v3.in(m / s);
constexpr quantity v6 = value_cast<m / s>(v4);
constexpr quantity v7 = value_cast<int>(v6);
std::cout << v1 << '\n'; // 110 km/h
std::cout << v2 << '\n'; // 70 mi/h
@@ -76,7 +77,7 @@ int main()
}
```
!!! example "[Try it on Compiler Explorer](https://godbolt.org/z/E4rvPGa3n)"
!!! example "[Try it on Compiler Explorer](https://godbolt.org/z/Tsesa1Pvq)"
!!! note