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Polyglot Piranha

flexible multilingual framework for chaining interdependent structural search/replace rules using any matching language.

Getting Started

Structural find / replace

Find and replace code in any declarative matching language (regex, tree-sitter queries). Specify extra matchers in our filter language to achieve finely-grained rewrites.

Chain rewrite rules

Cascade program transformations by chaining your rewrite rules with our graph language. Piranha will automatically refactor your code with your chaining strategy.

Generate rewrite rules from templates and annotations

// 1
import java.util.Executor;

// end

class SomeClass {
  void someMethod() {
    // 2
    Executor(:[x], :[y: identifier]);
    // end
  }
}
// 2 -> 1
// 1
import java.util.NovelExecutor;
import java.util.Wrapper;
// end

class SomeClass {
  void someMethod() {
    // 2
    Wrapper(NovelExecutor(:[x], :[y]);
    // end
    
  }
}