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parboiled is a mixed Java/Scala library providing for lightweight and easy-to-use, yet powerful and elegant parsing of arbitrary input text based on Parsing expression grammars (PEGs). PEGs are an alternative to context free grammars (CFGs) for formally specifying syntax, they make a good replacement for regular expressions and generally have quite a few advantages over the "traditional" way of building parsers via CFGs. parboiled is released under the Apache License 2.0.

The latest released version is 1.4.1.

Latest Blog Posts

→ parboiled 0.11.0 released
→ parboiled 0.10.0 released
→ parboiled 0.9.9 released
→ parboiled for Scala

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parboiled artifacts are available from Maven Central.

Content

Introduction
... Motivation
... Features
... Simple Java Example
... Simple Scala Example
... RegEx vs. parboiled vs. Parser Generators
... Projects using parboiled
Installation
Concepts
... The Big Picture
... The Rule Tree
... The Value Stack
... The Parse Tree
... AST Construction
... Parse Error Handling
parboiled for Java
... Rule Construction in Java
... Parser Action Expressions
... Working with the Value Stack
... Action Variables
... Parser Extension in Detail
... Style Guide
... Java Examples
...... ABC Grammar
...... Calculators
...... Time Parser
...... Java Parser
...... Markdown processor
parboiled for Scala
... Rule Construction in Scala
... Parser Actions in Scala
... Parser Testing in Scala
... Scala Examples
...... Simple Calculator
...... JSON Parser
Advanced Topics
... Handling Whitespace
... Parsing Performance Tuning
... Indentation Based Grammars
... The ProfilingParseRunner
... Grammar and Parser Debugging
... Thread Safety
Building parboiled
parboiled-core Javadoc API
parboiled-java Javadoc API
parboiled-scala Scaladoc API
Change Log
Patch Policy

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