default instance for IsString

[J. Garrett Morris]

On Mon, Apr 23, 2012 at 9:58 AM, Yitzchak Gale <gale at sefer.org> wrote:
> In addition, OverloadedStrings is unsound.

No.  OverloadedStrings treats string literals as applications of
fromString to character list constants.  fromString can throw errors,
just like fromInteger; this is no less sound than any Haskell function
throwing an exception.

 /g


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