[antlr-interest] Inheritance of parsers not working quite right
Jon Schewe
jpschewe at mtu.net
Mon May 27 12:28:27 PDT 2002
I'm using antlr 2.7.1 and working with a modified Java grammar. I
recently decided to addd 1.4 support, which means two grammars. I have
them inheriting from each other and something's not right. The only
change I have is one rule, statement, has an extra match rule at the end
for the assert keyword. So I put the full grammar in the supergrammar
and just the statement rule in the sub grammar.
Now if the rule in the supergrammar has the or condition for the assert
keyword and the subgrammar doesn't, then things work ok. However if the
supergrammar is missing support for the assert keyword and the
subgrammar has support for the assert keyword, then calling the parser
generated from the subgrammar doesn't recognize the assert keyword
properly. It's almost as if it was using the rules from the
supergrammar and ignoring the subgrammar rules. I put a print statement
in the initialization for the statement rule and the right rules are
getting called, just not working correctly.
Anyone have any ideas what's going on here?
--
Jon Schewe | http://mtu.net/~jpschewe | jpschewe at mtu.net
For I am convinced that neither death nor life, neither angels
nor demons, neither the present nor the future, nor any
powers, neither height nor depth, nor anything else in all
creation, will be able to separate us from the love of God that
is in Christ Jesus our Lord. - Romans 8:38-39
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