[Issue 12592] std.algorithm.keep?

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12592

--- Comment #2 from Nick Treleaven <ntrel-public at yahoo.co.uk> ---
I just added an overload of refill so it can behave like your keep():

const r = data.dup.sort().release.refill!uniq;

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