io-ts-types/es6/withValidate.js

A collection of codecs and combinators for use with io-ts

/**
 * @since 0.4.3
 */
import * as t from 'io-ts';
import { clone } from './clone';
/**
 * Returns a clone of the given codec which uses the given `validate` function
 *
 * @example
 * import { withValidate } from 'io-ts-types/es6/withValidate'
 * import * as t from 'io-ts'
 * import { PathReporter } from 'io-ts/es6/PathReporter'
 * import { either, right } from 'fp-ts/es6/Either'
 *
 * const T = withValidate(t.number, (u, c) => either.map(t.number.validate(u, c), n => n * 2))
 *
 * assert.deepStrictEqual(T.decode(1), right(2))
 * assert.deepStrictEqual(PathReporter.report(T.decode(null)), ['Invalid value null supplied to : number'])
 *
 * @since 0.4.3
 */
export function withValidate(codec, validate, name) {
    if (name === void 0) { name = codec.name; }
    var r = clone(codec);
    r.validate = validate;
    // tslint:disable-next-line: deprecation
    r.decode = function (i) { return validate(i, t.getDefaultContext(r)); };
    r.name = name;
    return r;
}