[Issue 18105] std.conv.parse!wchar cannot take a string

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18105

--- Comment #2 from dechcaudron+dlang.issue.tracking at protonmail.com ---
(In reply to Steven Schveighoffer from comment #1)
> What if the string's first dchar is a surrogate pair? It doesn't fit into a
> wchar then.

That is correct, and it will pose a problem when using 'to' (I'm already seeing
it. It throws UTFException. But 'parse' will indeed get the first element of
the pair in such case.

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