https://github.com/denorid/genfn

A module that helps you to write generated functions
https://github.com/denorid/genfn

deno function-compiler function-generator javascript typescript

Last synced: about 1 month ago
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A module that helps you to write generated functions

• Host: GitHub
• URL: https://github.com/denorid/genfn
• Owner: denorid
• License: mit
• Created: 2022-02-27T20:27:24.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2022-02-27T21:24:01.000Z (over 4 years ago)
• Last Synced: 2025-12-12T22:52:35.980Z (6 months ago)
• Topics: deno, function-compiler, function-generator, javascript, typescript
• Language: TypeScript
• Homepage:
• Size: 17.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# @denorid/genfn

A module that helps you to write generated functions in [Deno](https://deno.land),

based on npm [generate-function](https://github.com/mafintosh/generate-function) package.

## Usage

```TypeScript

import { genFn } from "https://deno.land/x/denorid_genfn@1.0.0/mod.ts"

const addNumber = (val: number) => {

  const gen = genFn(`

    function add(n) {

      return n + ${val}

    }

  `);

  return gen.toFunction();

}

const addTen = addNumber(10);

console.log(addTen.toString()); // prints the generated function

console.log("5 + 10 =", addTen(5));

```

If you need to close over variables in your generated function pass them to `toFunction(scope?: Record)`

```TypeScript

function multiply(a: number, b: number) {

  return a * b;

}

function addAndMultiplyNumber(val: number) {

  const gen = genFn(`

    function (n) {

      if (typeof n !== 'number') {

        throw new Error('argument should be a number')

      }

      const result = multiply(${val}, n + ${val})

      return result

    }

  `);

  return gen.toFunction({ multiply });

}

const addAndMultiply2 = addAndMultiplyNumber(2);

console.log(addAndMultiply2.toString()); // prints the generated function

console.log("(3 + 2) * 2 =", addAndMultiply2(3));

```

You can call `gen.generate(code: string | string[])` as many times as you want to append more source code to the function.