Re: Problem with using C++ code in Go lang

> Hi
>
> I want to use functions from HeliosDacAPI.cpp file (
> https://github.com/Grix/helios_dac/tree/master/sdk) in my Go program.
>
> I make a go module (HeliosDacAPI) which contains files:
>
> HeliosDacAPI.cpp (from repo)
> HeliosDACAPI.h (from repos)
> HeliosDAC.h (from repo)
> HeliosDAC.cpp (from repo)
> HeliosDacAPI.swig which contains:
> ```
> %module HeliosDacAPI
>
> %include "HeliosDacAPI.h"
> %include "HeliosDac.h"%
> ```
>
> Then I generate wrappers to c++ code by using command: `swig -go -c++ -cgo
> -intgosize 64 -module HeliosDacAPI HeliosDacAPI.cpp`
>
> Then I create a go project, include HeliosDacAPI module and try to use
> OpenDevices() function.
>
> ```
> package main
>
> import (
>   "HeliosDacAPI"
> )
>
> func main() {
>   helios := HeliosDacAPI().OpenDevices()
>   fmt.Printf("%+v", helios)
> }
> ```
>
> After execution (`go run main.go`) of above code I got realy long list of
> errors and warnings. I include only part of it:
>
> `# HeliosDacAPI
> HeliosDac.h:80: Warning 301: class keyword used, but not in C++ mode.
> # HeliosDacAPI
> HeliosDacAPI_wrap.c:245:53: error: unknown type name ‘bool’
>   245 | void _wrap_inited_set_HeliosDacAPI_c79d16aa38ff71d1(bool
> _swig_go_0) {
>       |                                                     ^~~~
> HeliosDacAPI_wrap.c:255:1: error: unknown type name ‘bool’
>   255 | bool _wrap_inited_get_HeliosDacAPI_c79d16aa38ff71d1() {
>       | ^~~~
> HeliosDacAPI_wrap.c: In function
> ‘_wrap_inited_get_HeliosDacAPI_c79d16aa38ff71d1’:
> HeliosDacAPI_wrap.c:256:3: error: unknown type name ‘bool’
>   256 |   bool result;
>       |   ^~~~
> HeliosDacAPI_wrap.c:257:3: error: unknown type name ‘bool’
>   257 |   bool _swig_go_result;
>       |   ^~~~
> HeliosDacAPI_wrap.c:260:13: error: ‘bool’ undeclared (first use in this
> function)
>   260 |   result = (bool)inited;
>       |             ^~~~
> HeliosDacAPI_wrap.c:260:13: note: each undeclared identifier is reported
> only once for each function it appears in
> HeliosDacAPI_wrap.c:260:18: error: expected ‘;’ before ‘inited’
>   260 |   result = (bool)inited;
>       |                  ^~~~~~
>       |                  ;
> .....
> `
>
> I assume that I made some mistake with preparing the wrappers. Could you
> help me and give me some hints how should I use swig in order to use
> HeliosDacAPI functions in Go?
>
> Best regards,
> Tomasz Rojek
>
>

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