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79 :: Lambda functions

• ivanhv77 (orginal) [2012-10-01T22:19:53+02:00] view original

  Hi.

  Congrats for this superb language. I find it quite enjoyable.

  Now for the question. I've been searching for lambda functions, and that's the best I found

  var list = @[1,2,3,4,5,6,7,8,9]
  
  proc process(s: seq[int], f: proc(a:int):int) =
        for i in s:
          echo(f(i))
  
  process(list, proc(a:int):int = a*a)
  Run

  Is there some way Nimrod compiler infers types for this (or better, an abbreviated syntax "a la" clojure's style)?

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• Araq (orginal) [2012-10-01T23:11:57+02:00] view original

  Not yet. Planed syntax is:

  
  
  process(list, a:: a*a)
  Run

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• ivanhv77 (orginal) [2012-10-01T23:59:29+02:00] view original

  Wouldn't this syntax have the same limitation as Python lambdas (one-line expressions, only)?

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• Araq (orginal) [2012-10-02T21:53:10+02:00] view original

  No. Python's limitation results from how the interaction between its lexer and parser has been defined. It works differently in Nimrod and thus there are no problems with multi-line expressions. And even if it would only work for one-liners, the proc syntax already supports multiple lines.

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