Mirror of forum.nim-lang.org

4854 :: Wrapping C++ class with overloaded constructors

• sdwfrost (orginal) [2019-05-17T00:06:42+02:00] view original

  Dear All,

  I'm trying to wrap this C++ header:

  https

  which has a constructor SeqStreamIn( const char* filename )

  My Nim code is

  
  # Compile with
  # nim cpp --cincludes:. --passL:"-lz" kseqpp
  
  import os
  
  const
      seqio = "seqio.h"
  
  type
      SeqStreamInObj {.header: seqio, importcpp: "klibpp::SeqStreamIn".} = object
      SeqStreamIn = ptr SeqStreamInObj
  
  proc newSeqStreamIn*(fn: cstring): SeqStreamInObj {.importcpp: "klibpp::SeqStreamIn(#)".}
  
  when isMainModule:
      var iss = newSeqStreamIn("sample.fastq".cstring)
  Run

  However, when I compile, I get an error, error: no matching function for call to ‘klibpp::SeqStreamIn::SeqStreamIn()’.

  Any ideas of what I'm doing wrong?

---

• Araq (orginal) [2019-05-19T19:50:02+02:00] view original

  You need to use this instead:

  proc newSeqStreamIn*(fn: cstring): SeqStreamInObj {.importcpp: "klibpp::SeqStreamIn(@)".}
  
  Run

  (I think, couldn't test it.)

---