1234567891011121314151617181920212223
import { Key, Values } from "../libs/types.ts";import { RULE, ValueSchemaError } from "../libs/ValueSchemaError.ts";export interface Rules<T> {    /** transformer function */    transform?: (value: T, fail: () => never) => T;}/** * apply schema * @param values input/output values * @param rules rules * @param keyStack key stack for error handling * @returns escapes from applyTo chain or not */export function applyTo<T>(values: Values, rules: Rules<T>, keyStack: Key[]): values is Values<T> {    if (rules.transform === undefined) {        return false;    }    values.output = rules.transform(values.output as T, () => {        return ValueSchemaError.raise(RULE.TRANSFORM, values, keyStack);    });    return true;}