41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.UnionEvaluated = UnionEvaluated;
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const type_1 = require("../create/type");
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const index_1 = require("../symbols/index");
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const index_2 = require("../discard/index");
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const index_3 = require("../never/index");
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const index_4 = require("../optional/index");
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const union_create_1 = require("./union-create");
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// ------------------------------------------------------------------
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// TypeGuard
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// ------------------------------------------------------------------
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const kind_1 = require("../guard/kind");
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// prettier-ignore
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function IsUnionOptional(types) {
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return types.some(type => (0, kind_1.IsOptional)(type));
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}
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// prettier-ignore
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function RemoveOptionalFromRest(types) {
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return types.map(left => (0, kind_1.IsOptional)(left) ? RemoveOptionalFromType(left) : left);
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}
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// prettier-ignore
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function RemoveOptionalFromType(T) {
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return ((0, index_2.Discard)(T, [index_1.OptionalKind]));
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}
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// prettier-ignore
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function ResolveUnion(types, options) {
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const isOptional = IsUnionOptional(types);
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return (isOptional
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? (0, index_4.Optional)((0, union_create_1.UnionCreate)(RemoveOptionalFromRest(types), options))
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: (0, union_create_1.UnionCreate)(RemoveOptionalFromRest(types), options));
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}
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/** `[Json]` Creates an evaluated Union type */
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function UnionEvaluated(T, options) {
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// prettier-ignore
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return (T.length === 1 ? (0, type_1.CreateType)(T[0], options) :
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T.length === 0 ? (0, index_3.Never)(options) :
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ResolveUnion(T, options));
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}
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