antlr

I'm trying to use ANTLR to take a simple grammar and produce assembly output. My language of choice in ANTLR is Python. Many tutorials seem very complicated or elaborate on things that aren't relevant to me; I only really need some very simple functionality. So I have two questions: 'Returning' values from one rule to another. So let's say I have a rule like: assignment: name=IDENTIFIER ASSIGNMENT expression; I can run Python code in {}s when this rule is recognised, and I can pass args to the Python code for expression by doing something like: assignment: name=IDENTIFIER ASSIGNMENT expression

I have a grammar file BoardFile.g4 that has (relevant parts only): grammar Board; //Tokens GADGET : 'squareBumper' | 'circleBumper' | 'triangleBumper' | 'leftFlipper' | 'rightFlipper' | 'absorber' | 'portal' ; NAME : [A-Za-z_][A-Za-z_0-9]* ; INT : [0-9]+ ; FLOAT : '-'?[0-9]+('.'[0-9]+)? ; COMMENT : '#' ~( '\r' | '\n' )*; WHITESPACE : [ \t\r\n]+ -> skip ; KEY : [a-z] | [0-9] | 'shift' | 'ctrl' | 'alt' | 'meta' | 'space' | 'left' | 'right' | 'up' | 'down' | 'minus' | 'equals' | 'backspace' | 'openbracket' | 'closebracket' | 'backslash' | 'semicolon' | 'quote' | 'enter' | 'comma' | 'period' |

What is the correct way to solve this problem in ANTLR: I have a simple grammar rule, say for a list with an arbitrary number of elements. list : '[]' | '[' value (COMMA value)* ']' If I wanted to assign a return value for list, and have that value be the actual list of returned values from the production, what is the proper way to do it? The alternatives I'm entertaining are: create my own stack in the global scope to keep track of these lists Try to inspect the tree nodes below me and extract information that way Access it in some slick and cool way that I'm hoping to find out about in which

I'm looking for a bibtex grammar in ANTLR to use in a hobby project. I don't want to spend my time for writing ANTLR grammar (this may take some time for me because it will involve a learning curve). So I'd appreciate for any pointers. Note: I've found bibtex grammars for bison and yacc but couldn't find any for antlr. Edit: As Bart pointed the I don't need to parse the preambles and tex in the quoted strings. Here's a (very) rudimentary BibTex grammar that emits an AST (contrary to a simple parse tree): grammar BibTex; options { output=AST; ASTLabelType=CommonTree; } tokens { BIBTEXFILE; TYPE

Which one would you prefer to declare a variable in which case, global scope or @members declaration? It seems to me that they can serve for same purpose? UPDATE here is a grammar to explain what i mean. grammar GlobalVsScope; scope global{ int i; } @lexer::header{package org.inanme.antlr;} @parser::header{package org.inanme.antlr;} @parser::members { int j; } start scope global; @init{ System.out.println($global::i); System.out.println(j); }:R EOF; R:'which one'; Note that besides global (ANTLR) scopes, you can also have local rule-scopes, like this: grammar T; options { backtrack=true; }