Domain-Specific Languages: Design and Implementation/

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Extension of Java Compiler With JastAdd

Extension of Java Compiler With JastAdd

Learn about JastAdd syntax and discuss the extension of the Java compiler with JastAdd.

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Syntax of JastAdd

The syntax involves defining aspects, introducing attributes, and specifying how these aspects interact with the existing codebase. Below is an overview of the key syntax elements:

Aspect definition

An aspect in JastAdd is defined using the aspect keyword and stored in a jrag file format. It encapsulates specific functionalities and modifications to the compiler:

aspect MyAspect {
  // Aspect-specific code and declarations
}

Attribute declaration

Attributes in JastAdd are declared using the syn (synthesized) or inh (inherited) keywords: 

aspect MyAspect {
  syn String MyAttribute(); // Syntax for synthesized attributes
  inh int InheritedAttribute(); // Syntax for inherited attributes
}

Synthesized and inherited attributes are used to propagate information in different directions within the abstract syntax tree (AST) structure.

  1. Synthesized attributes (syn ...