1 | import { Tail } from './Tail';
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2 | import { Cast } from '../Any/Cast';
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3 | import { IterationOf } from '../Iteration/IterationOf';
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4 | import { Iteration } from '../Iteration/Iteration';
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5 | import { Way } from '../Iteration/_Internal';
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6 | import { List } from './List';
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7 | import { Pos } from '../Iteration/Pos';
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8 | import { Prev } from '../Iteration/Prev';
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9 | import { Prepend } from './Prepend';
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10 | import { Naked } from './_Internal';
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11 | import { Extends } from '../Any/Extends';
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12 |
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13 |
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14 |
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15 | declare type DropForth<L extends List, N extends Iteration> = {
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16 | 0: DropForth<Tail<L>, Prev<N>>;
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17 | 1: L;
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18 | }[Extends<0, Pos<N>>];
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19 |
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20 |
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21 |
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22 | declare type DropBack<L extends List, N extends Iteration, I extends Iteration = Prev<N>, LN extends List = []> = {
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23 | 0: DropBack<L, N, Prev<I>, Prepend<LN, L[Pos<I>]>>;
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24 | 1: LN;
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25 | }[Extends<-1, Pos<I>>];
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26 |
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27 |
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28 |
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29 | declare type __Drop<L extends List, N extends Iteration, way extends Way> = {
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30 | '->': DropForth<L, N>;
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31 | '<-': DropBack<L, N>;
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32 | }[way];
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33 |
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34 |
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35 |
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36 | export declare type _Drop<L extends List, N extends number, way extends Way = '->'> = __Drop<Naked<L>, IterationOf<N>, way> extends infer X ? Cast<X, List> : never;
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37 |
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38 |
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39 |
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40 |
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41 |
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42 |
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43 |
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44 |
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45 |
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46 |
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47 | export declare type Drop<L extends List, N extends number, way extends Way = '->'> = L extends unknown ? N extends unknown ? _Drop<L, N, way> : never : never;
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48 | export {};
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