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5946 :: Why does `k in t.keys.toSeq.sorted` works but `k in t.keys.toSeq.sorted()` does not.

• treeform (orginal) [2020-02-18T20:22:55+01:00] view original

  
  import tables, sequtils, algorithm
  
  var t: Table[int, int]
  
  # this works:
  for k in t.keys.toSeq.sorted:
    echo $k
  
  # this does not?
  for k in t.keys.toSeq.sorted():
    echo $k
  Run

  A very strange error in the second case:

  
  Error: undeclared field: 'keys'
  Run

  Is this some sort of iterator/macro bug or a feature?

  https://play.nim-lang.org/#ix=2c4I

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• ggibson (orginal) [2020-02-19T00:40:01+01:00] view original

  Couldn't render post #36871.

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• ggibson (orginal) [2020-02-19T00:42:05+01:00] view original

  I forgot I was going to say, the fix is something like:

  for k in toSeq(t.keys).sorted():
  Run

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• treeform (orginal) [2020-02-19T02:37:35+01:00] view original

  Thanks! I am glad the explanation exists.

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