antlr

I understand the theory behind separating parser rules and lexer rules in theory, but what are the practical differences between these two statements in ANTLR: my_rule: ... ; MY_RULE: ... ; Do they result in different AST trees? Different performance? Potential ambiguities? Jen wrote : ... what are the practical differences between these two statements in ANTLR ... MY_RULE will be used to tokenize your input source. It represents a fundamental building block of your language. my_rule is called from the parser, it consists of zero or more other parser rules or tokens produced by the lexer. That

This is a simplified version of the original problem. I have a class called Person: public class Person { public string Name { get; set; } public int Age { get; set; } public int Weight { get; set; } public DateTime FavouriteDay { get; set; } } ...and lets say an instance: var bob = new Person { Name = "Bob", Age = 30, Weight = 213, FavouriteDay = '1/1/2000' } I would like to write the following as a string in my favourite text editor.... (Person.Age > 3 AND Person.Weight > 50) OR Person.Age < 3 I would like to take this string and my object instance and evaluate a TRUE or FALSE - i.e.

I'm creating a simple programming language for a school project. I'm using ANTLR 4 to generate a lexer and a parser from my grammar. Until now, I have been using ANTLRs listener pattern to apply the actual functionality of the programming language. Now I would like to implement if/else statements but I'm not sure that these can actually be implemented when using the listener pattern as ANTLR decides in which order to traverse the parse tree when using listeners and I imagine that the implementation of if/else statements will require jumping around the parse tree depending on which condition in