GrammarAST t = optionsSubTrees.get(i);
CommonTree elWithOpt = t.parent;
if ( elWithOpt instanceof GrammarASTWithOptions ) {
Map<String, GrammarAST> options = ((GrammarASTWithOptions) elWithOpt).getOptions();
if ( options.containsKey(LeftRecursiveRuleTransformer.TOKENINDEX_OPTION_NAME) ) {
GrammarToken newTok = new GrammarToken(g, elWithOpt.getToken());
newTok.originalTokenIndex = Integer.valueOf(options.get(LeftRecursiveRuleTransformer.TOKENINDEX_OPTION_NAME).getText());
elWithOpt.token = newTok;
GrammarAST originalNode = g.ast.getNodeWithTokenIndex(newTok.getTokenIndex());
if (originalNode != null) {
// update the AST node start/stop index to match the values
// of the corresponding node in the original parse tree.
elWithOpt.setTokenStartIndex(originalNode.getTokenStartIndex());
elWithOpt.setTokenStopIndex(originalNode.getTokenStopIndex());
}
else {
// the original AST node could not be located by index;
// make sure to assign valid values for the start/stop
// index so toTokenString will not throw exceptions.
elWithOpt.setTokenStartIndex(newTok.getTokenIndex());
elWithOpt.setTokenStopIndex(newTok.getTokenIndex());
}
}
}
}
}