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Use this: microsoft/TypeScript#25947 (comment) trick to optimize type…
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interface Iterable<C> {} | ||
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const unrelated = Symbol() | ||
type unrelated = typeof unrelated | ||
interface Collections<K,V> { | ||
[unrelated]: V[] | ||
} | ||
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interface ZipConcatMixin<T,SelfIdentifier extends keyof Collections<any,any>> { | ||
zip<U>(other: Collection<any, U>): Collections<number, [T,U]>[SelfIdentifier]; | ||
zip<U,V>(other: Collection<any, U>, other2: Collection<any,V>): Collections<number, [T,U,V]>[SelfIdentifier]; | ||
//zip<U,V,M>(other: Collection<any, U>, other2: Collection<any,V>, other3: Collection<any,M>): Collections<[T,U,V,M]>[SelfIdentifier]; | ||
zip(...collections: Array<Collection<any, any>>): Collections<number,any>[SelfIdentifier]; | ||
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concat<C>(...valuesOrCollections: Array<Iterable<C> | C>): Collections<number,T | C>[SelfIdentifier]; | ||
} | ||
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interface MapFilterMixin<K,V,SelfIdentifier extends keyof Collections<any,any>> { | ||
map<M>( | ||
mapper: (value: V, key: K, iter: this) => M, | ||
context?: any | ||
): Collections<K,M>[SelfIdentifier]; | ||
// flatMap<M>( | ||
// mapper: (value: V, key: K, iter: this) => Iterable<M>, | ||
// context?: any | ||
// ): Collections<K,M>[SelfIdentifier]; | ||
filter<F extends V>( | ||
predicate: (value: V, index: K, iter: this) => value is F, | ||
context?: any | ||
): Collections<K,F>[SelfIdentifier]; | ||
filter( | ||
predicate: (value: V, index: K, iter: this) => any, | ||
context?: any | ||
): this; | ||
} | ||
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export interface List<T> extends CollectionIndexed<T, ListSelf> { | ||
} | ||
const ListSelf = Symbol() | ||
type ListSelf = typeof ListSelf | ||
interface Collections<K,V> { | ||
[ListSelf]: List<V> | ||
} | ||
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export interface SeqIndexed<T> extends CollectionIndexed<T, SeqIndexedSelf> { | ||
toSeq(): this | ||
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zipAll(...collections: Array<Collection<any, any>>): SeqIndexed<any>; | ||
} | ||
const SeqIndexedSelf = Symbol() | ||
type SeqIndexedSelf = typeof SeqIndexedSelf | ||
interface Collections<K,V> { | ||
[SeqIndexedSelf]: SeqIndexed<V> | ||
} | ||
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export interface CollectionIndexed<T, SelfIdentifier extends keyof Collections<any, any> = CollectionIndexedSelf> extends Collection<number, T, SelfIdentifier>, ZipConcatMixin<T, SelfIdentifier> { | ||
interpose(separator: T): this; | ||
} | ||
const CollectionIndexedSelf = Symbol() | ||
type CollectionIndexedSelf = typeof CollectionIndexedSelf | ||
interface Collections<K,V> { | ||
[CollectionIndexedSelf]: CollectionIndexed<V> | ||
} | ||
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export interface Collection<K, V, SelfIdentifier extends keyof Collections<any,any> = CollectionSelf> extends MapFilterMixin<K,V,SelfIdentifier> { | ||
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// Conversion to JavaScript types | ||
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toJS(): Array<any> | { [key: string]: any }; | ||
toJSON(): Array<V> | { [key: string]: V }; | ||
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// Conversion to Collections | ||
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toMap(): Collection<K, V>; | ||
toOrderedMap(): Collection<K, V>; | ||
toSet(): Collection<V,V>; | ||
toOrderedSet(): Collection<V,V>; | ||
toList(): List<V>; | ||
toStack(): Collection<V,V>; | ||
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// Conversion to Seq | ||
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toSeq(): Collection<K, V>; | ||
toKeyedSeq(): Collection<K, V>; | ||
toIndexedSeq(): SeqIndexed<V>; | ||
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// Sequence algorithms | ||
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// map<M>( | ||
// mapper: (value: V, key: K, iter: this) => M, | ||
// context?: any | ||
// ): Collection<K, M>; | ||
// filter<F extends V>( | ||
// predicate: (value: V, key: K, iter: this) => value is F, | ||
// context?: any | ||
// ): Collection<K, F>; | ||
// filter( | ||
// predicate: (value: V, key: K, iter: this) => any, | ||
// context?: any | ||
// ): this; | ||
filterNot( | ||
predicate: (value: V, key: K, iter: this) => boolean, | ||
context?: any | ||
): this; | ||
sort(comparator?: (valueA: V, valueB: V) => number): this; | ||
sortBy<C>( | ||
comparatorValueMapper: (value: V, key: K, iter: this) => C, | ||
comparator?: (valueA: C, valueB: C) => number | ||
): this; | ||
groupBy<G>( | ||
grouper: (value: V, key: K, iter: this) => G, | ||
context?: any | ||
): /*Map*/Collection<G, /*this*/Collection<K, V>>; | ||
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// Padding | ||
takeUntil0(predicate: (iter: this) => boolean): this; | ||
takeUntil1(predicate: (iter: this) => boolean): this; | ||
takeUntil2(predicate: (iter: this) => boolean): this; | ||
takeUntil3(predicate: (iter: this) => boolean): this; | ||
takeUntil4(predicate: (iter: this) => boolean): this; | ||
takeUntil5(predicate: (iter: this) => boolean): this; | ||
takeUntil6(predicate: (iter: this) => boolean): this; | ||
ttakeUntil0(predicate: (iter: this) => boolean): this; | ||
ttakeUntil1(predicate: (iter: this) => boolean): this; | ||
ttakeUntil2(predicate: (iter: this) => boolean): this; | ||
ttakeUntil3(predicate: (iter: this) => boolean): this; | ||
ttakeUntil4(predicate: (iter: this) => boolean): this; | ||
ttakeUntil5(predicate: (iter: this) => boolean): this; | ||
ttakeUntil6(predicate: (iter: this) => boolean): this; | ||
tttakeUntil0(predicate: (iter: this) => boolean): this; | ||
tttakeUntil1(predicate: (iter: this) => boolean): this; | ||
tttakeUntil2(predicate: (iter: this) => boolean): this; | ||
tttakeUntil3(predicate: (iter: this) => boolean): this; | ||
tttakeUntil4(predicate: (iter: this) => boolean): this; | ||
tttakeUntil5(predicate: (iter: this) => boolean): this; | ||
tttakeUntil6(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil0(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil1(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil2(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil3(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil4(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil5(predicate: (iter: this) => boolean): this; | ||
ttttakeUntil6(predicate: (iter: this) => boolean): this; | ||
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tttttakeUntil0(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil1(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil2(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil3(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil4(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil5(predicate: (iter: this) => boolean): this; | ||
tttttakeUntil6(predicate: (iter: this) => boolean): this; | ||
} | ||
const CollectionSelf = Symbol() | ||
type CollectionSelf = typeof CollectionSelf | ||
interface Collections<K,V> { | ||
[CollectionSelf]: Collection<K,V> | ||
} | ||
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function a<T> () { | ||
const a: SeqIndexed<T> = 0 as any | ||
const b: CollectionIndexed<T> = a | ||
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const c: CollectionIndexed<T, SeqIndexedSelf> = 0 as any | ||
c.zip(0 as any as Collection<any, T>) | ||
const d: CollectionIndexed<T, CollectionIndexedSelf> = c | ||
d.zip(0 as any as Collection<any, T>) | ||
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return b | ||
} | ||
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const b: SeqIndexed<(number | string)> = 0 as any | ||
const c = b.filter((v): v is number => typeof v !== "string") |