How can I include line numbers in automatically generated ASTs?
Location: http://www.jguru.com/faq/view.jsp?EID=62654 Created: Jun 7, 2000 Modified: 2000-06-07 15:47:03.119 Author: Fondement Frederic (http://www.jguru.com/guru/viewbio.jsp?EID=14817) Tree parsers are often used in type checkers. But useful error messages need the offending line number. So I have written: import antlr.CommonAST; import antlr.Token; public class CommonASTWithLines extends CommonAST { private int line = 0; public void initialize(Token tok) { super.initialize(tok); line=tok.getLine(); } public int getLine(){ return line; } } initialize is automatically called when an AST is created from a Token object, which has its own line variable.
