Dmitri Hrybenko 938e7c2676 stdlib: introduce UnicodeScalarLiteralConvertible protocol ...

This allows UnicodeScalars to be constructed from an integer, rather
then from a string.  Not only this avoids an unnecessary memory
allocation (!) when creating a UnicodeScalar, this also allows the
compiler to statically check that the string contains a single scalar
value (in the same way the compiler checks that Character contains only
a single extended grapheme cluster).

rdar://17966622

Swift SVN r21198

2014-08-14 16:04:39 +00:00

35 KiB

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