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Asked: 2026-05-14T18:02:15+00:00

I am learning Parser Combinators in scala and seeing different ways of parsing.I mainly

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I am learning Parser Combinators in scala and seeing different ways of parsing.I mainly see three different kind of parsers ie.RegexpParsers,StandardTokenParsers and JavaTokenParsers.I am new to parsing and not getting the idea how we will choose the suitable Parser according to our requirement.Can any one please explain how these different parsers work and when to use them.

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  1. Editorial Team

    RegexpParsers allow you to use RE values (typically in the form "re pattern".r but equally any other Regex instance). There are no pre-defined lexical productions (tokens).

    JavaTokenParsers defines lexical productions for Java tokens: decimalNumber, floatingPointNumber, stringLiteral, wholeNumber, ident (identifier).

    StandardTokenParsers defines lexical productions “… for a simple, Scala-like language. It parses keywords and identifiers, numeric literals (integers), strings, and delimiters.” Its constituents are actually defined in StdLexical.

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