type-plus
Version:
Provides additional types for TypeScript.
16 lines • 698 B
JavaScript
// By Drew Colthorp, <https://spin.atomicobject.com/2018/01/15/typescript-flexible-nominal-typing/#comment-604580>
// <https://gist.github.com/dcolthorp/aa21cf87d847ae9942106435bf47565d>
import { isType } from '../type-guard/is_type.js';
import { typeSym, valueSym } from './constants.js';
export function flavor(type, subject) {
if (subject === undefined)
return function (subject) {
return flavor(type, subject);
};
if (isType(subject, s => typeof s === 'object' && s !== null)) {
// if subject is not an object, the branding will exist only in type-level.
subject[typeSym] = type;
}
return subject;
}
//# sourceMappingURL=flavor.js.map