[Issue 7348] to!string(null) matches more than one template declaration

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7348


Kenji Hara <k.hara.pg at gmail.com> changed:

           What    |Removed                     |Added
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--- Comment #8 from Kenji Hara <k.hara.pg at gmail.com> 2012-05-12 09:22:49 PDT ---
Now to!string(null) returns cast(string)null.
Because null is implicitly convertible to string.

Unit-test only:
https://github.com/D-Programming-Language/phobos/pull/575

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