guard | /src/parsers/simple-parsers.ts | ts_matches@v5.2.0 | Deno

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x/ts_matches/src/parsers/simple-parsers.ts>guard

Being able to pattern match in typescript

Blu-J/ts-matches

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index.ts (default module)

array-of-parser.ts

array-parser.ts

concat-parser.ts

default-parser.ts

deferred-parser.ts

dictionary-parser.ts

DictionaryParser

DictionaryShaped

DictionaryTuple

every-parser.ts

function-parser.ts

guard-parser.ts

ISimpleParsedError

literal-parser.ts

mapped-parser.ts

maybe-parser.ts

number-parser.ts

object-parser.ts

recursive-parser.ts

RecursiveParser

shape-parser.ts

simple-parsers.ts

string-parser.ts

tuple-parser.ts

TupleParserInto

unknown-parser.ts

function guard

import { guard } from "https://deno.land/x/ts_matches@v5.2.0/src/parsers/simple-parsers.ts";

guard<A, B extends A>(test: (value: A) => value is B, testName?: string): Parser<A, B>

Create a custom type guard

Type Parameters

A

B extends A

Parameters

test: (value: A) => value is B

A function that will determine runtime if the value matches

optional

testName: string

A name for that function, useful when it fails

Returns