[Issue 18044] std.conv.to for implicitly convertible associative arrays

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18044

--- Comment #1 from John Colvin <john.loughran.colvin at gmail.com> ---
https://github.com/dlang/phobos/pull/5909

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