Hi Johannes, The answer is:
A) You can't, the way haskell-src-exts is built. You need to specify the %partial directives in the happy grammar, so without editing haskell-src-exts there's no way you could tack on partiality to the existing parsing primitives. B) It's a great feature request (to the point where I wonder why I haven't thought of it before), that should be quite easy to implement. I already export a partial parser for top-of-file pragmas, there's no reason why I couldn't export partial parsers for all the other entry points as well. I hope I can implement it shortly, but if you want it really fast and certain - patches are most welcome! Cheers, /Niklas On Mon, Mar 14, 2011 at 6:55 PM, J. Waldmann <[email protected]>wrote: > Hi. > > I want to use parsers from haskell-src-exts as sub-parsers, > which does not seem to work since they insist on consuming the input > completely. > > I would need them to parse a maximal prefix, > and return the (unconsumed) rest of input as well > (cf. > > http://hackage.haskell.org/packages/archive/parsec/3.1.1/doc/html/Text-Parsec-Prim.html#v:getInput > ) > > I figure that happy has the %partial directive for that, but the > description > > http://www.haskell.org/happy/doc/html/sec-directives.html#sec-partial-parsers > does not really tell me how to obtain the rest of the input. > > Any hints (or code samples) appreciated. Thanks - J.W. > > > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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