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7844 :: Incorrect example in documentation for Return statement?

• masiarek2 (orginal) [2021-04-24T04:37:12+02:00] view original

  link: https://nim-lang.org/docs/manual.html

  search for

  proc returnZero(): int =
    # implicitly returns 0
  Run

  I get error message:

  Error: invalid indentation

  1.4.6/config/nim.cfg' [Conf]

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• ElegantBeef (orginal) [2021-04-24T04:43:29+02:00] view original

  I do not think that example is supposed to be runnable, but if you must you can make a PR and replace that code with.

  proc returnZero(): int =
    ## implicitly returns 0
  Run

  or

  proc returnZero(): int = discard
  # implicitly returns 0
  Run

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• holgerschurig (orginal) [2021-04-25T10:06:49+02:00] view original

  You example is still not compiling:

  proc returnZero(): int = discard
    # implicitly returns 0
    # but it actually doesn't, because the comment above doesn't match the function signature
  
  var
    n : int = returnZero
  Run

  The original code created this error

  
  .../discard.nim(6, 13) Error: type mismatch: got 'proc (): int' for 'returnZero' but expected 'int'
  Run

  and now we have that error

  
  .../discard.nim(6, 13) Error: type mismatch: got 'proc (): int{.noSideEffect, gcsafe, locks: 0.}' for 'returnZero' but expected 'int'
  Run

  (with nim 1.5.1)

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• ElegantBeef (orginal) [2021-04-25T10:09:04+02:00] view original

  Helps if you actually call the procedure and do not attempt to assign it to an int.

  proc returnZero(): int = discard
  # implicitly returns 0
  
  var n: int = returnZero()
  Run

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