Request: Use primitives methods as lambda calls

[damon-kwok]

Primitives methods as lambda

If you call the primitive method without parentheses, the call is automatically wrapped as lambda

Example

primitive Str
   // Tweak whitespace
  fun trim (s: String): String =>
    ...

actor Main
  new create(env: Env) =>
    Seqs.map([" a "; " b "; " c "], Str.trim)   //Result:  ["a"; "b"; "c"]

[SeanTAllen]

Can you provide some motivation for why this would be desirable? Every RFC should contain some motivation as to why it is desirable. Even requests.

Please note in case you are aware. Opening an issue such as this is a request for another human (other than you) to write up the full RFC so the more details you provide them, the better.

[SeanTAllen]

I'm not sure of your motivation, but I suspect that you can already do it using partial application:

primitive Foo
  fun hello(x: String): String =>
    "hello " + x

actor Main
  new create(env: Env) =>
    print_with_y(env.out, Foo~hello())

  fun print_with_y(stream: OutStream, f: {(String): String} val) =>
    stream.print(f("there"))

Runnable at the playground:

https://playground.ponylang.io/?gist=7ac613b68b129c7588e828e904fcbd03

[damon-kwok]

Thanks @SeanTAllen This is exactly what I wanted. I am so sorry for this issue.