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24 lines
1.1 KiB
Plaintext
24 lines
1.1 KiB
Plaintext
import { CreateType } from '../create/type.mjs';
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import { Union } from '../union/index.mjs';
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import { ExtendsCheck, ExtendsResult } from './extends-check.mjs';
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import { ExtendsFromMappedKey } from './extends-from-mapped-key.mjs';
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import { ExtendsFromMappedResult } from './extends-from-mapped-result.mjs';
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// ------------------------------------------------------------------
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// TypeGuard
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// ------------------------------------------------------------------
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import { IsMappedKey, IsMappedResult } from '../guard/kind.mjs';
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// prettier-ignore
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function ExtendsResolve(left, right, trueType, falseType) {
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const R = ExtendsCheck(left, right);
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return (R === ExtendsResult.Union ? Union([trueType, falseType]) :
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R === ExtendsResult.True ? trueType :
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falseType);
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}
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/** `[Json]` Creates a Conditional type */
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export function Extends(L, R, T, F, options) {
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// prettier-ignore
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return (IsMappedResult(L) ? ExtendsFromMappedResult(L, R, T, F, options) :
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IsMappedKey(L) ? CreateType(ExtendsFromMappedKey(L, R, T, F, options)) :
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CreateType(ExtendsResolve(L, R, T, F), options));
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}
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