cvs commit: fptools/libraries/HaXml/src/Text/ParserCombinators
Poly.hs PolyState.hs TextParser.hs
Malcolm.Wallace at cs.york.ac.uk
Sun Nov 27 06:56:58 EST 2005
malcolm 2005/11/27 03:56:58 PST
Change the internal representation of the parsing monad. There are now
two classes of failure, ordinary and bad. Ordinary failures can be
skipped over through the backtracking choice operator `onFail`. But bad
failures override the backtracking, and propagate out regardless.
Some new combinators are necessary: failBad (like fail), commit (raises
severity of failure if it arises), adjustErrBad (like adjustErr).
Another new combinator, manyFinally, is for a possibly-empty sequence
that should have a recognisable terminator. If the sequence fails, it
could either be due to a malformed element, or a malformed terminator.
Revision Changes Path
1.3 +70 -18 fptools/libraries/HaXml/src/Text/ParserCombinators/Poly.hs
1.2 +82 -27 fptools/libraries/HaXml/src/Text/ParserCombinators/PolyState.hs
1.3 +16 -15 fptools/libraries/HaXml/src/Text/ParserCombinators/TextParser.hs
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