Re: Proposal: Add Text.Read.maybeRead :: Read a => String -> Maybe a

7 Feb 2008


      On Thu, 7 Feb 2008, Don Stewart wrote:
...
This function is typically defined once per project. So its
about time this safe variant of 'read' made it into the base.
maybeRead :: Read a => String -> Maybe a
    maybeRead s = case reads s of
        [(x, "")] -> Just x
        _         -> Nothing
Consideration period: 1 week.
Patch to Text.Read attached.
Seems to be useful. May prevent people from using just 'read' while hoping
that parsing will always succeed.

Re: Proposal: Add Text.Read.maybeRead :: Read a => String -> Maybe a

Henning Thielemann