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RCC Feature List

RCC is a LALR(1) compiler compiler, written in Ruby, and supporting (theoretically) any output language.

Declarative grammar:

• grammar is purely declarative and is therefore output-language-independent
• parser is generated as a class, and action code is added by subclassing and defining “event handler” methods

Generated components include:

• lexer
• parser
• AST classes
• AST construction code
• error recovery system
• grammar help system

Additional features:

• optional backtracking support, for dynamic resolution of ambiguous grammars
• error recovery system in generated parser that engages when a syntax error is detected:
  • allows parsing to continue beyond the first error
  • provides user with higher-quality error messages, that are more likely to identify the cause of an error, and not just its effect
  • error report includes suggested repairs for the error

Debugging tools:

• a grammar interpreter that explains how your grammar actually works on a particular source file, including clear descriptions of why it is making the choices it is making