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Document BETTER_ENUMS_DECLARE_STD_HASH

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Follow-on to #77.

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Anton Bachin 2020-10-19 08:26:14 +03:00
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doc/ApiReference.md
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@ -413,6 +413,21 @@ as [`_from_string`](#_from_string). In case of failure, sets the stream's
### Hashing
#### macro <em>BETTER_ENUMS_DECLARE_STD_HASH</em>(Enum)
Use this outside namespace scope to declare a specialization of `std::hash` for
the type `Enum`. For example:
// This declaration might be inside a namespace.
<em>BETTER_ENUM</em>(<em>Channel</em>, int, Red, Green, Blue)
// Later, outside the namespace:
<em>BETTER_ENUMS_DECLARE_STD_HASH</em>(<em>Channel</em>)
%% class = api
%% description = Detailed description of the Better Enums API.