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7395 :: How to convert const char * to string?

• AllenDang (orginal) [2021-01-17T04:21:23+01:00] view original

  I'm trying to use wxnim and met a problem.

  All the widget's getValue method returns a WxString, by reading the document, WxString.cStr().asCString() could return a const char *.

  So I tried to receive the string value using

  var str = textCtrl.getValue().cStr().asCString()
  Run

  Compiler tells initialize a variable of type 'NCSTRING' (aka 'char *') with an rvalue of type 'const char *'.

  How can I convert const char * from C++ side to nim string?

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• DeletedUser (orginal) [2021-01-17T07:13:01+01:00] view original

  asCString returns a cstring (manual), which you can easily convert to string via type conversion or $.

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• AllenDang (orginal) [2021-01-18T03:51:01+01:00] view original

  No, $ dosen't work.

  Both ` var name = $(nameCtrl.getValue().cStr().asCString())` and var name = $nameCtrl.getValue().cStr().asCString() reports same error.

  error: cannot initialize a variable of type 'NCSTRING' (aka 'char *') with an rvalue of type 'const char *'

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• cdunn2001 (orginal) [2021-01-20T19:21:59+01:00] view original

  I hit the same problem a long time ago. IIRC, I had to do this:

  let
    cstr = foo.asCstring()
    nimstr = $cstr
  Run

  I never learned why $() didn't work, but sometimes the parser has trouble. Not too big a deal.

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