Re: [RFC][Discuss] Arrow Functions

Hey Stephen > You don't *have to* specify types at all. If you want to use PHP without > verifying/requiring types, thats your prerogative, but given the recent improvements to allow scalar > type hinting, I think it’s a mistake to say that *any* use of type hints is “not > recommended”.. Sure you don’t but then you loose all the benefits of specifying types. We want typing but only if we don’t have to specify types all over the place. I really dislike having to add PHPDocs everywhere just to get some proper autocompletions. > I'm not sure if you've mixed up your terms of if I'm too tired but I don't > understand what you mean here. The short arrow function *is* the callee, and that’s where you’re > suggesting we shouldn’t use type hints. Sorry, that was confusing. I was thinking of a situation like this one: ```Swift func fetchUsers(callback: ([User]) -> Void) {     ... } ``` So, the callee (fetchUsers) defines what the provided closure must look like. The caller, on the other hand, doesn’t have to specify that again as you’re just repeating yourself. ```Swift fetchUsers { user in    // user is inferred to be a User object } ``` So I don’t think the burden of providing typing information should be on the caller providing the closure. > The whole issue with that is that using a pipe character could make things much less > clear/readable if the already established use of pipe for “type unions” (currently used in > multi-catch) were to be implemented for general type hint usage. > > Note: I’m not saying it’s not possible, but it’s *much* less readable, and any > “solution” just adds more characters, which is apparently the only reason to not use > function($foo) => $foo in the first place. But again, that’s personal preference. I like short a precise and think it’s more readable. Not everyone’s the same. >  For most people readability isn't just about the number of characters. A lot of the time it is. Brains are very good at recognising patterns, they don’t need large keywords for that. As for me, I think it just adds clutter to the actual logic that I’m interested in.