Re: Why this results in Error: Syntax error in input(3).

Otan.

> On 31. Dec 2021, at 8.40, [email protected] wrote:
> 
> 
> Hi,
> 
> in this file:
> 
> https://github.com/nyholku/swig-experiments/blob/master/Patched_Standard_Handle.hxx
> 
> if I uncomment lines 216-218 and delete line 219, ie if I change:
> 
> #if 1
> 
> to (as it was in the original un patched file):
> 
> #if (defined(__clang__)) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1300) || \
>    (defined(_MSC_VER) && _MSC_VER >= 1800) || \
>    (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
> 
> 
> I get
> 
> ../Patched_Standard_Handle.hxx:229: Error: Syntax error in input(3).
> 
> why SWIG chokes on that?
> 
> This is even more weird to me because in lines 240-242 exactly same #if works (AFAIU).
> 
> The whole problematic #if/#else#endif section from lines 216 to 235 is here for reference:
> 
> //#if (defined(__clang__)) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1300) || \
> //    (defined(_MSC_VER) && _MSC_VER >= 1800) || \
> //    (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
> #if 1
> 
>    //! Conversion to bool for use in conditional expressions
>    explicit operator bool () const
>    {
>      return entity != nullptr;
>    }
> 
> #else /* fallback version for compilers not supporting explicit conversion operators (VC10, VC11, GCC below 4.5) */
> 
>    //! Conversion to bool-compatible type for use in conditional expressions
>    operator Standard_Transient* handle::* () const
>    {
>      return entity ? &handle::entity : 0;
>    }
> 
> #endif
> 
> wbr Kusti
> 
> 
> 
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