/**
* Given ^(TOKEN_REF ^(OPTIONS ^(ELEMENT_OPTIONS (= assoc right)))) set option assoc=right in
* TOKEN_REF.
*/
public static void setNodeOptions(GrammarAST node, GrammarAST options) {
GrammarASTWithOptions t = (GrammarASTWithOptions) node;
if (t.getChildCount() == 0) return;
for (Object o : options.getChildren()) {
GrammarAST c = (GrammarAST) o;
if (c.getType() == ANTLRParser.ASSIGN) {
t.setOption(c.getChild(0).getText(), (GrammarAST) c.getChild(1));
} else {
t.setOption(c.getText(), null); // no arg such as ID<VarNodeType>
}
}
}
