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typescripttypesramda.jscurrying

Curried function seems not typesafe with Typescript and ramda

I have a function:

function myFunction(n: number, s: string, n2: number): boolean {
  throw ''
}

I partially call it using ramda 0.27.1:

const curriedStringNon = curry(myFunction)(123, 'string')

But then I missed some typesafety:

curriedStringNon(123) // <- this is allowed which is expected
curriedStringNon('string') // <- this errors as it should
curriedStringNon() // <- but why is this allowed?

I don't expect this to compile because myFunction cannot be called with only two args:

myFunction(123, 'string') // <- this also errors which is expected
Solution

  • As I said in the comments,

    From Ramda's point of view, that's not an error. You just get back the function. This has been a point of contention even among the core team, but I'd argue that it's the most logical behavior.

    and

    I wrote an answer several months ago that has some bearing on this.