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39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
import { OptionalKind } from '../symbols/index.mjs';
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import { CreateType } from '../create/type.mjs';
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import { Discard } from '../discard/index.mjs';
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import { Never } from '../never/index.mjs';
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import { Optional } from '../optional/index.mjs';
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import { IntersectCreate } from './intersect-create.mjs';
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// ------------------------------------------------------------------
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// TypeGuard
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// ------------------------------------------------------------------
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import { IsOptional, IsTransform } from '../guard/kind.mjs';
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// prettier-ignore
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function IsIntersectOptional(types) {
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return types.every(left => IsOptional(left));
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}
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// prettier-ignore
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function RemoveOptionalFromType(type) {
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return (Discard(type, [OptionalKind]));
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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 => IsOptional(left) ? RemoveOptionalFromType(left) : left);
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}
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// prettier-ignore
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function ResolveIntersect(types, options) {
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return (IsIntersectOptional(types)
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? Optional(IntersectCreate(RemoveOptionalFromRest(types), options))
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: IntersectCreate(RemoveOptionalFromRest(types), options));
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}
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/** `[Json]` Creates an evaluated Intersect type */
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export function IntersectEvaluated(types, options = {}) {
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if (types.length === 1)
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return CreateType(types[0], options);
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if (types.length === 0)
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return Never(options);
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if (types.some((schema) => IsTransform(schema)))
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throw new Error('Cannot intersect transform types');
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return ResolveIntersect(types, options);
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}
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