hkt-toolbelt

A higher-kinded-type companion to ts-toolbelt

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This library provides type-level utilities across many domains that may be mapped and combined in a functional way, using higher-kinded types.

Write robust, type-safe software with the benefit of composable and compile-time efficient types.

We aim to support hundreds of kind categories, including List, Boolean, String, Function, and more. We also provide a set of combinators for composing types.

[Full API Docs]

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1. Installation

> npm install hkt-toolbelt

2. Usage

import { $, List, Conditional } from "hkt-toolbelt";

type Result = $<
  List.Filter<Conditional.Extends<number>>,
  [1, "foo", 2, 3, "bar"]
>; // [1, 2, 3]

Changelog

[0.17.1]

• Introduce various other Parser combinators.
  • Add Parser.Run for state management.
  • Add Parser.Map for mapping over the result of a parser.
  • Add Parser.Letter and Parser.Letters for parsing letters.
  • Add Parser.ObjectSequence for better result extraction.
• Add Object.Emplace and Object.Merge methods.
• Increase performance of various string and list utilities.