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Module

x/fun/mod.ts>decoder.isKey

A collection of algebraic data types, lenses, and schemables based on a light weight higher kinded type implementation. Written for deno.
baetheus/fun
Latest
function decoder.isKey
import { decoder } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { isKey } = decoder;

A refinement that returns true when a DecodeError is a Key.

Examples

Example 1

import * as D from "./decoder.ts";

const result1 = D.isKey(D.keyErr(
  "one",
  D.leafErr(1, "expected string")
)); // true
const result2 = D.isKey(D.manyErr()); // false

Returns

err is Key