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1954 :: Caller line numbers in templates?

• zielmicha (orginal) [2016-01-19T13:45:21+01:00] view original

  Let's say I have a frequently used template foo, used all over my code. If there is an exception thrown inside code inserted by foo there is no way to see line numbers (on the stacktrace) of the proc which instantiated it. Is there a way to disable line number inside templates?

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• jboy (orginal) [2016-01-19T14:00:18+01:00] view original

  Hi @zielmicha, is this what you're looking for? instantiationInfo

  There's also getStackTrace, that may be useful to you (but apparently only in debug builds).

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• zielmicha (orginal) [2016-01-19T17:54:53+01:00] view original

  instantiationInfo is helpful, but I'd like to achieve something different.

  
  template foo(): stmt =
    if true: raise newException(ValueError, "foo!")
  
  proc foo1() =
    foo()
    foo()
    foo()
  
  foo1()
  Run

  This code shows:

  
  Traceback (most recent call last)
  foomodule.nim(9)         foomodule
  foomodule.nim(2)         foo1
  Run

  so I don't know which foo caused the exception. I would like to be able to temporarily disable line number tracking in templates, so the stack trace would be:

  
  Traceback (most recent call last)
  foomodule.nim(9)         foomodule
  foomodule.nim(5)         foo1
  Run

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• bluenote (orginal) [2017-07-15T18:16:26+02:00] view original

  I'm just trying to figure out exactly the same. Did you find a solution to that?

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• zielmicha (orginal) [2019-02-07T22:03:05+01:00] view original

  Still haven't found a solution :( .

  (looking for it today again, I've only found my old post)

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• Krux02 (orginal) [2019-02-08T11:23:37+01:00] view original

  This should be an automatic solution for this problem: https://github.com/nim-lang/Nim/pull/10569

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• Araq (orginal) [2019-02-08T11:29:20+01:00] view original

  This works:

  template foo() =
    {.line: instantiationInfo().}:
      if true: raise newException(ValueError, "foo!")
  
  proc foo1() =
    foo()
    foo()
    foo()
  
  foo1()
  Run

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