[Issue 6843] Function to check whether std.conv.to will succeed

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6843



--- Comment #6 from Jonathan M Davis <jmdavisProg at gmx.com> 2013-09-06 21:54:18 PDT ---
Another possibility would be a function which did the same thing as std.conv.to
except that it returned success, and the actual result was returned via an out
parameter. That's even more similar to maybeTo, but again, a key difference is
that there is zero throwing going on whatsoever and std.conv.to would not be
benig wrapped, since the key thing we need here IMHO is to avoid throwing for
efficiency's sake. This would probably require breaking out many of the toImpl
functions so that they use this new function and then throw on failure (in
order to avoid code duplication).

Ultimately, issue# 6840 and this one are looking to solve essentially the same
problem though.

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