melt/dist/utils/types.d.ts

The next generation of Melt UI. Built for Svelte 5.

export type ValueOf<T> = T[keyof T];
export type Expand<T> = T extends infer O ? O : never;
export type ExpandDeep<T> = T extends object ? T extends infer O ? {
    [K in keyof O]: ExpandDeep<O[K]>;
} : never : T;
type What<T extends Record<string, string | number | boolean>, Sep extends string = "; ", K extends string = ""> = ExpandDeep<{
    [key in keyof T]: key extends string ? {} extends Omit<T, key> ? `${K}${key}: ${T[key]}` : What<Omit<T, key>, Sep, `${K}${key}: ${T[key]}${Sep}`> : never;
}>;
type UnionToParm<U> = U extends unknown ? (k: U) => void : never;
type UnionToSect<U> = UnionToParm<U> extends (k: infer I) => void ? I : never;
type ExtractParm<F> = F extends {
    (a: infer A): void;
} ? A : never;
type SpliceOne<Union> = Exclude<Union, ExtractOne<Union>>;
type ExtractOne<Union> = ExtractParm<UnionToSect<UnionToParm<Union>>>;
type ToTuple<Union> = ToTupleRec<Union, []>;
type ToTupleRec<Union, Rslt extends unknown[]> = SpliceOne<Union> extends never ? [ExtractOne<Union>, ...Rslt] : ToTupleRec<SpliceOne<Union>, [ExtractOne<Union>, ...Rslt]>;
type FindWhat<T> = ToTuple<T extends string ? T : FindWhat<T[keyof T]>>[0];
export type ObjToString<T extends Record<string, string | number | boolean>> = FindWhat<What<T>>;
export type Expect<T extends true> = T;
export type Equal<X, Y> = (<T>() => T extends X ? 1 : 2) extends <T>() => T extends Y ? 1 : 2 ? true : false;
export type FalseIfUndefined<T extends boolean | undefined> = T extends undefined ? false : T;
export {};