How to use a generated parse in TypeScript program

[evil-shrike]

Hi. I generated a parser using the online generator, downloaded it as CommonJS. But my project is in TypeScript, so I need a type declaration for the generated file. I'm running this:

npx -p typescript tsc ./parser.js  --declaration --allowJs --emitDeclarationOnly

where parser.js is the generated parser. I'm getting an error: parser.js:1:1 - error TS9005: Declaration emit for this file requires using private name 'peg$SyntaxError'. An explicit type annotation may unblock declaration emit.

1 module.exports = // @generated by Peggy 4.1.1.

Any ideas how to fix?

[hildjj]

• Install peggy locally, with something like npm install --save-dev peggy
• Use --format es if you are in an ES6 project, otherwise, use --format commonjs
• Use --dts to output a .d.ts file next to the .js file
• Set the output of peggy to be your typescript dist directory
• From the typescript file where you want to use your parser, use import {parse} from '../dist/parser.js' for example.

[hildjj]

Please re-open this issue if it turns out the suggested approach doesn't work.