@sinclair/typebox
Version:
Json Schema Type Builder with Static Type Resolution for TypeScript
31 lines (29 loc) • 1.57 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Extract = void 0;
const index_1 = require("../union/index");
const index_2 = require("../never/index");
const index_3 = require("../extends/index");
const type_1 = require("../clone/type");
const extract_from_mapped_result_1 = require("./extract-from-mapped-result");
const extract_from_template_literal_1 = require("./extract-from-template-literal");
// ------------------------------------------------------------------
// TypeGuard
// ------------------------------------------------------------------
const type_2 = require("../guard/type");
function ExtractRest(L, R) {
const extracted = L.filter((inner) => (0, index_3.ExtendsCheck)(inner, R) !== index_3.ExtendsResult.False);
return extracted.length === 1 ? extracted[0] : (0, index_1.Union)(extracted);
}
/** `[Json]` Constructs a type by extracting from type all union members that are assignable to union */
function Extract(L, R, options = {}) {
// overloads
if ((0, type_2.IsTemplateLiteral)(L))
return (0, type_1.CloneType)((0, extract_from_template_literal_1.ExtractFromTemplateLiteral)(L, R), options);
if ((0, type_2.IsMappedResult)(L))
return (0, type_1.CloneType)((0, extract_from_mapped_result_1.ExtractFromMappedResult)(L, R), options);
// prettier-ignore
return (0, type_1.CloneType)((0, type_2.IsUnion)(L) ? ExtractRest(L.anyOf, R) :
(0, index_3.ExtendsCheck)(L, R) !== index_3.ExtendsResult.False ? L : (0, index_2.Never)(), options);
}
exports.Extract = Extract;