26 lines
1.3 KiB
Plaintext
26 lines
1.3 KiB
Plaintext
import { CreateType } from '../create/type.mjs';
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import { Union } from '../union/index.mjs';
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import { Never } from '../never/index.mjs';
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import { ExtendsCheck, ExtendsResult } from '../extends/index.mjs';
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import { ExcludeFromMappedResult } from './exclude-from-mapped-result.mjs';
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import { ExcludeFromTemplateLiteral } from './exclude-from-template-literal.mjs';
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// ------------------------------------------------------------------
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// TypeGuard
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// ------------------------------------------------------------------
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import { IsMappedResult, IsTemplateLiteral, IsUnion } from '../guard/kind.mjs';
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function ExcludeRest(L, R) {
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const excluded = L.filter((inner) => ExtendsCheck(inner, R) === ExtendsResult.False);
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return excluded.length === 1 ? excluded[0] : Union(excluded);
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}
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/** `[Json]` Constructs a type by excluding from unionType all union members that are assignable to excludedMembers */
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export function Exclude(L, R, options = {}) {
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// overloads
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if (IsTemplateLiteral(L))
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return CreateType(ExcludeFromTemplateLiteral(L, R), options);
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if (IsMappedResult(L))
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return CreateType(ExcludeFromMappedResult(L, R), options);
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// prettier-ignore
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return CreateType(IsUnion(L) ? ExcludeRest(L.anyOf, R) :
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ExtendsCheck(L, R) !== ExtendsResult.False ? Never() : L, options);
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}
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