CODEWITHSUNDEEP
javascripttypestitaniumffipurescript
Jasper Lyons
Jasper Lyons

Reputation: 43

Purescript FFI type definitions for constructor functions

I'm trying to wrap parts of the titanium api with PureScripts foreign function interface but I'm having trouble working out what the type definitions of the functions should be.

module Ti where

  foreign import data Window :: *

  foreign import window
    """ function (config) {
      return function () {
        return Ti.UI.createWindow(config);
      }
    } """ :: ??? -> Window

    foreign import open
    """ function (window) {
      return function () {
        window.open();
        return window;
      }
    } """ :: Window -> Window

    main = do
      w <- window ???
      open w

Upvotes: 2

Views: 474

Answers (1)

Phil Freeman
Phil Freeman

Reputation: 4169

You might consider using the Foreign type from the purescript-foreign library as the argument type, together with the purescript-options library to construct the appropriate options object.

I've written a short guide to the purescript-options library here, and there is another example in the project repository.

Upvotes: 2

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