Generate ADT Typescript types for ANTLR4 grammars using antlr4ts.

Install

$ yarn add -D antlr4ts
$ yarn add antlr4ts-adt

Now create a MyGrammar.g4 file and generate the corresponding ADT types:

$ npx antlr4ts MyGrammar.g4 -visitor
$ npx antlr4ts-adt MyGrammarParser.ts

This creates a file MyGrammarAdt.ts with the types generated from the grammar and a getAst function.

Example

A simple calculator:

• ANTL4 Grammar: Calculator.g4
• Autogenerated ADT Typescript types: CalculatorAdt.ts
• AST eval example: calculator.ts

$ git clone https://github.com/tokland/antlr4ts-adt
$ cd example
$ yarn install

$ npx antlr4ts Calculator.g4 -o antlr4 -visitor
$ npx antlr4ts-adt antlr4/CalculatorParser.ts
$ npx ts-node calculator.ts "1 + product(5 - 2, 2) + sum(1, 2, 2 + 1)"
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