:: a -> a package:rex

A default view function used when expression antiquotes are empty, or when pattern antiquotes omit a view pattern. See the documentation for rexPreprocessPat and rexPreprocessExp for more details. You can locally shadow this rexView with your own version, if you wish. One good option is readMay from the safe package: http://hackage.haskell.org/package/safe/docs/Safe.html#v:readMay. The type of this identity rexView is fully polymorphic so that it can be used with either String or ByteString.