[ci skip]

Improve broadcast! extension docs.
JuliaLang · Dec 21, 2017 · 140de09 · 140de09
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commit 140de09
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diff --git a/doc/src/manual/interfaces.md b/doc/src/manual/interfaces.md
@@ -618,3 +618,12 @@ broadcast!(f, dest, ::MyBroadcastStyle, As...)
 ```
 
 Note the lack of bounds on `f`, `dest`, and `As...`.
+
+Third, simultaneously specializing on both the type of `dest` and the `BroadcastStyle` is fine. In this case,
+it is also allowed to specialize on the types of the source arguments (`As...`). For example, these method signatures are OK:
+
+```julia
+broadcast!(f, dest::DestType, ::MyBroadcastStyle, As...)
+broadcast!(f, dest::DestType, ::MyBroadcastStyle, As::AbstractArray...)
+broadcast!(f, dest::DestType, ::Broadcast.Scalar, As::Number...)
+```