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User-defined literals for YGValue

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Summary:
@public

Adds `_pt` and `_percent` user defined literals to create `YGValue` instances.

This allows to create `YGValue`s in the following form:

```
use namespace facebook::yoga::literals;

auto a = 123_pt; // == YGValue{123.0f, YGUnitPoint}
auto b = -12.5_percent; // == YGValue{-12.5f, YGUnitPercent}
```

Reviewed By: SidharthGuglani

Differential Revision: D13942100

fbshipit-source-id: ce1e2f9431c3e2a99c6e11896a712539cc535e0d
This commit is contained in:
David Aurelio 2019-02-04 10:21:37 -08:00 committed by Facebook Github Bot
parent c599625df0
commit 5184f0d7a3
1 changed files with 26 additions and 0 deletions
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26
ReactCommon/yoga/yoga/YGValue.h
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@ -54,4 +54,30 @@ inline bool operator!=(const YGValue& lhs, const YGValue& rhs) {
return !(lhs == rhs);
}
inline YGValue operator-(const YGValue& value) {
return {-value.value, value.unit};
}
namespace facebook {
namespace yoga {
namespace literals {
inline YGValue operator"" _pt(long double value) {
return YGValue{static_cast<float>(value), YGUnitPoint};
}
inline YGValue operator"" _pt(unsigned long long value) {
return operator"" _pt(static_cast<long double>(value));
}
inline YGValue operator"" _percent(long double value) {
return YGValue{static_cast<float>(value), YGUnitPercent};
}
inline YGValue operator"" _percent(unsigned long long value) {
return operator"" _percent(static_cast<long double>(value));
}
} // namespace literals
} // namespace yoga
} // namespace facebook
#endif