Perform an unfold transform on a grammar
The unfold command applies the unfold transform to a collection of terminal nodes in the parse tree, which is identified with the supplied xpath expression. Prior to using this command, you must have the file parsed. An unfold operation substitutes the right-hand side of a parser or lexer rule into a reference of the rule name that occurs at the specified node.
trunfold <string>
Before:
grammar Expresion;
s : e ;
e : e '*' e # Mult
| INT # primary
;
INT : [0-9]+ ;
WS : [ \t\n]+ -> skip ;
Command:
trparse Expression.g4 | trunfold "//parserRuleSpec[RULE_REF/text() = 's']//labeledAlt//RULE_REF[text() = 'e']" | trsponge -c
After:
grammar Expression;
s : ( e '*' e | INT ) ;
e : e '*' e # Mult
| INT # primary
;
INT : [0-9]+ ;
WS : [ \t\n]+ -> skip ;
If you are running MSYS2 on Windows, you may notice that XPaths are not being processed by this command correctly. To avoid the Bash shell from altering XPaths, type export MSYS2_ARG_CONV_EXCL="*", then execute your command.
0.23.7 Fixed trcover when started outside of Generated directory. Fixed analysis of grammars in trgen.
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