tcomb/lib/decompose.js

Type checking and DDD for JavaScript

var isType = require('./isType');

function isRefinement(type) {
  return isType(type) && type.meta.kind === 'subtype';
}

function getPredicates(type) {
  return isRefinement(type) ?
    [type.meta.predicate].concat(getPredicates(type.meta.type)) :
    [];
}

function getUnrefinedType(type) {
  return isRefinement(type) ?
    getUnrefinedType(type.meta.type) :
    type;
}

function decompose(type) {
  return {
    predicates: getPredicates(type),
    unrefinedType: getUnrefinedType(type)
  };
}

module.exports = decompose;