Hans, >Paul Hilfinger is thinking about actions that during a split are executed >immediately, in addition to those delayed until the merge. This will enable >the kinds of things that you are asking for, I think, as one then can build >the parse trees, and make a selection based on that.
I think the only way forward is for me to write some code, in yyparse, to select between the various parses when an ambiguity is detected. >Otherwise, you seem to simply ask for nondeterministic parsing, where one >keeps track of all the parsing possibilities. Such parsers are not difficult >to write, see for example the Parsing Techniques book: > http://www.cs.vu.nl/~dick/PTAPG.html I bought the book when it originally came out. No quality generalized LR parsers available for decades and then two come along at almost the same time http://www.cs.berkeley.edu/~smcpeak/elkhound/ derek -- Derek M Jones tel: +44 (0) 1252 520 667 Knowledge Software Ltd mailto:[EMAIL PROTECTED] Applications Standards Conformance Testing http://www.knosof.co.uk _______________________________________________ Help-bison@gnu.org http://lists.gnu.org/mailman/listinfo/help-bison
