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911 :: Generic ToAny

• GravityWell (orginal) [2015-02-21T16:56:30+01:00] view original

  Shouldn't this work?

  import typetraits, typeinfo
  
  proc echotype[T](z1: T) =
      echo "Name:" & z1.type.name
      var x1: TAny = toany(z1)
  
  echotype 1.0 # Error: for a 'var' type a variable needs to be passed
  Run

  Maybe I'm using ToAny wrong here, but it works in a non generic proc.

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• EXetoC2 (orginal) [2015-02-23T13:33:30+01:00] view original

  It makes no difference whether or not it's generic. toAny expects a var, and z1 is not one. You can do either this:

  import typetraits, typeinfo
  
  proc echotype[T](z1: var T) =
      echo "Name:" & z1.type.name
      var x1: TAny = toany(z1)
  var x = 1.0
  echotype x
  Run

  Or this:

  import typetraits, typeinfo
  
  proc echotype[T](z1: T) =
      echo "Name:" & z1.type.name
      var z1 = z1
      var x1: TAny = toany(z1)
  
  echotype 1.0
  Run

  The latter of which is more convenient.

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