JastAdd and ANTLR

JastAdd

ANTLR

Purpose

JastAdd is primarily used to generate extensible Java compilers. It enables developers to add new language features or modify the behavior of the Java compiler. This is done without directly modifying the compiler’s source code.

ANTLR is a powerful parser generator that recognizes and processes languages. It can generate parsers for various programming languages and is not limited to Java.

Key Features

Aspect-oriented programming: JastAdd uses aspect-oriented programming (AOP) principles. Developers define aspects encapsulating language extensions, which can be woven into the existing codebase.

Attribute grammar: JastAdd is based on attribute grammar, allowing the definition of attributes that calculate properties of nodes in the abstract syntax tree (AST).

LL(*) parsing: ANTLR generates parsers using LL(*) parsing, a powerful and flexible strategy.

Lexer and parser generation: ANTLR can generate both lexer and parser components for a given language grammar.

Use Cases

JastAdd is suitable for projects that extend or modify the Java language. It is a powerful tool for language researchers, compiler developers, and those working on language-oriented projects.

ANTLR is suitable for projects that focus on parsing and analyzing languages. This is if the focus is not necessarily on modifying the behavior of a compiler or language.

Benefits

JastAdd’s strength lies in its ability to modularize language extensions and transformations. It provides a clean and extensible way to enhance the Java compiler.

ANTLR is widely used to implement interpreters, create domain-specific languages (DSLs), and perform static code analysis.