WIP: TypeScript typings #157
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packages/base/index.d.ts
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| __tag: 'Just'; | ||
| value: A; | ||
| map<B>(f: (_: A) => B): Maybe<B>; | ||
| apply<B>(this: Maybe<(_: A) => B>, f: Maybe<A>): Maybe<B>; |
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this type incorrect i think. We use the Generic variable A here for other Maybe, it cause typescript infer the this context must be Maybe<(_: (_: A) => B) => B>. To make it clear try: ma.map(tuple).apply(mb).
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apply<B, C>(this: Maybe<(_: B) => C>, other: Maybe<B>): Maybe<C> might do the trick, don't use the A variable in Generic.
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Yeah, the A type variable should be local to that method.
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Well, overloaded functions on arrays will have to be replaced by static arity functions. Too many silent type errors from TypeScript otherwise :/ |
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This adds partial support for Core, Validation, Result, and Maybe
TypeScript can't distinguish between them correctly :(
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packages/base/index.d.ts
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| toString(): string; | ||
| equals(that: Maybe<A>): boolean; | ||
| unsafeGet(): A; | ||
| fold<B>(onJust: (_: A) => B, onNothing: () => B): B; |
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This one is inverted, onNothing is first and onJust in second
packages/base/index.d.ts
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| toString(): string; | ||
| equals(that: Maybe<A>): boolean; | ||
| unsafeGet(): A; | ||
| fold<B>(onJust: (_: A) => B, onNothing: () => B): B; |
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The same case I've mentioned in the comment above
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3.0.1-ts fixes .fold and .fromNullable in Maybe |
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Semigroup types don't work with TS 2.8.1 |
This PR tracks the work on TypeScript typings (#65). These will work with Folktale 2.x. There's a separate branch to rewrite Folktale in TypeScript (#115). That'll be a breaking change (using ES6 modules), and thus a new major version. TypeScript in Folktale will likely be released early 2018.
Current status
v3.0.1-ts is available on the
tstypeschannel:npm install folktale@tstypes[ ]adt (note that adt fundamentally can't have useful types)[X]concurrency[X]conversions[/]core (missingcurry&partialize)[ ]fantasy-land[/]maybe[/]result[/]validation[/]indicates partial support,[X]indicates full support.