Yes. I found it with a litle bit help from Ross. Cheers, Krasimir On Wed, 23 Mar 2005 16:52:00 -0000, Simon Marlow wrote:

This is the right behaviour: the parser isn't greedy. You just need to take a parse in which the remainder is empty.

See for example Distribution.ParseUtils.runP.

Cheers, Simon

On 23 March 2005 15:19, Krasimir Angelov wrote:

...

What I need is to have simple function of type (String -> Version). How I can do that with the current implementataion?

On Wed, 23 Mar 2005 15:16:09 +0000, Ross Paterson wrote:

...

On Wed, Mar 23, 2005 at 02:55:47PM +0000, Krasimir Angelov wrote:

...

I have found a bug in Data.Version. The expression:

readP_to_S parseVersion "1.0"

produces:

[(Version {versionBranch = [1], versionTags = []},".0"),(Version {versionBranch= [1,0], versionTags = []},"")]

With other words the parser is ambiguous.

It's no more ambiguous than

readP_to_S (many1 (satisfy isDigit)) "1234" [("1","234"),("12","34"),("123","4"),("1234","")]

It just needs to be used in context.

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