remeda/dist/TupleSplits-35Ht8LCA.d.cts

A utility library for JavaScript and Typescript.

import { C as CoercedArray } from './CoercedArray-DRz3tqda.cjs';
import { I as IterableContainer } from './IterableContainer-CtfinwiH.cjs';
import { P as PartialArray } from './PartialArray-DqgYiDUP.cjs';
import { R as RemedaTypeError } from './RemedaTypeError-BIoNlKC-.cjs';
import { T as TupleParts } from './TupleParts-Ci1vY__a.cjs';

/**
 * The union of all possible ways to write a tuple as [...left, ...right].
 */
type TupleSplits<T extends IterableContainer> = T extends unknown ? // The complete set of all splits is the union of splitting each part of
SplitPrefix<T> | SplitOptional<T> | SplitRest<T> | SplitSuffix<T> : never;
type SplitPrefix<T extends IterableContainer> = FixedTupleSplits<TupleParts<T>["required"]> extends infer Req ? Req extends {
    left: infer Left;
    right: infer Right extends Array<unknown>;
} ? {
    left: Left;
    right: [
        ...Right,
        ...PartialArray<TupleParts<T>["optional"]>,
        ...CoercedArray<TupleParts<T>["item"]>,
        ...TupleParts<T>["suffix"]
    ];
} : RemedaTypeError<"SplitPrefix", "Unexpected result shape from FixedTupleSplits", {
    type: never;
    metadata: [Req, T];
}> : never;
type SplitOptional<T extends IterableContainer> = FixedTupleSplits<TupleParts<T>["optional"]> extends infer Optional ? Optional extends {
    left: infer Left extends Array<unknown>;
    right: infer Right extends Array<unknown>;
} ? {
    left: [...TupleParts<T>["required"], ...PartialArray<Left>];
    right: [
        ...PartialArray<Right>,
        ...CoercedArray<TupleParts<T>["item"]>,
        ...TupleParts<T>["suffix"]
    ];
} : RemedaTypeError<"SplitOptional", "Unexpected result shape from FixedTupleSplits", {
    type: never;
    metadata: [Optional, T];
}> : never;
type SplitRest<T extends IterableContainer> = {
    left: [
        ...TupleParts<T>["required"],
        ...PartialArray<TupleParts<T>["optional"]>,
        ...CoercedArray<TupleParts<T>["item"]>
    ];
    right: [...CoercedArray<TupleParts<T>["item"]>, ...TupleParts<T>["suffix"]];
};
type SplitSuffix<T extends IterableContainer> = FixedTupleSplits<TupleParts<T>["suffix"]> extends infer Suffix ? Suffix extends {
    left: infer Left extends Array<unknown>;
    right: infer Right;
} ? {
    left: [
        ...TupleParts<T>["required"],
        ...PartialArray<TupleParts<T>["optional"]>,
        ...CoercedArray<TupleParts<T>["item"]>,
        ...Left
    ];
    right: Right;
} : RemedaTypeError<"SplitSuffix", "Unexpected result shape from FixedTupleSplits", {
    type: never;
    metadata: [Suffix, T];
}> : never;
type FixedTupleSplits<L, R extends Array<unknown> = []> = {
    left: L;
    right: R;
} | (L extends readonly [...infer Head, infer Tail] ? FixedTupleSplits<Head, [Tail, ...R]> : never);

export type { TupleSplits as T };