ts-cast/esm/engine/restrict.js

Runtime typechecking

import { isEmpty } from './guards';
import { throwTypeError } from './throw-type-error';
const applyRule = (value, context, reportError) => (rule) => {
    const error = rule(value);
    if (!error)
        return;
    reportError(`${context ? `${context} should be` : 'expected value is'} ${error} but received ${value}.`, context);
};
export const restrict = (caster, rules) => {
    const validator = (value, context, reportError = throwTypeError) => {
        const typedValue = caster(value, context, reportError);
        if (!isEmpty(typedValue))
            rules.forEach(applyRule(typedValue, context, reportError));
        return typedValue;
    };
    Reflect.defineProperty(validator, 'name', { value: caster.name });
    return validator;
};