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8706 :: Error: identifier expected, but got: paramStr(1)

• luqaska (orginal) [2021-12-12T19:45:19+01:00] view original

  So, I had this code:

  
  import std/os
  import system/io
  echo paramStr(1)
  if declared(paramStr(1)) == true:
      echo It exists
  else:
      echo It doesn't exists
  Run

  And then while I was compiling this error ocurred:

  Error: identifier expected, but got: paramStr(1)

  I don't know what could be the cause of it, maybe it could be the type of paramStr?

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• aEverr (orginal) [2021-12-12T19:48:53+01:00] view original

  declared is a compile time construct, paramstr is a runtime construct. declared cannot take information from paramstr

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• luqaska (orginal) [2021-12-12T19:52:44+01:00] view original

  Ohhh... But, there is an alternative to declared that could I use?

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• argl (orginal) [2021-12-12T19:56:10+01:00] view original

  I think the issue is that declared is evaluated at compile time while paramStr can only work at runtime.

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• xigoi (orginal) [2021-12-12T20:13:05+01:00] view original

  Maybe you meant

  if paramCount() >= 1:
  Run

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• SolitudeSF (orginal) [2021-12-12T20:59:49+01:00] view original

  what are you even trying to do?

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• ynfle (orginal) [2021-12-12T21:33:29+01:00] view original

  Also don't import system, it's imported automatically

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• Yardanico (orginal) [2021-12-12T21:34:34+01:00] view original

  I assume you want to output the first command-line argument passed to the binary. Your code has a lot of unnecessary stuff, first of all, you don't need to import system modules explicitly - system is always imported.

  Then your usage of declared is wrong - first of all, it's supposed to be used in a compile-time context with when, and then it should only be used to check if a variable with a certain name is _declared. You want to check the amount of passed arguments, so you should use paramCount instead (as @xigoi mentioned).

  Also echo is supposed to be used on strings or objects that have a stringification proc, so you should use quotes to output strings.

  Here's how the fixed code can look like:

  import std/os
  
  if paramCount() >= 1:
      echo "First argument - ", paramStr(1)
  else:
      echo "It doesn't exist"
  Run

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• luqaska (orginal) [2021-12-12T21:58:34+01:00] view original

  Check if paramStr(1) exists

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• luqaska (orginal) [2021-12-12T22:08:58+01:00] view original

  I think it would work in my case

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• luqaska (orginal) [2021-12-12T22:10:42+01:00] view original

  Ok, I'll have that in mind the next time I have to make a question

  Thank you very much to all people who participed in this thread

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