Re: [pygccxml-development] improving user experience

[Matthias B. <ba...@ir...>]

Roman Yakovenko wrote:
> On 7/23/06, Matthias Baas <ba...@ir...> wrote:
>> Declaration "MTime & MTime::operator--(int arg0) [member_operator]"
>> could not be exported.
>> "operator--" is not supported.
>>          See Boost.Python documentation:
>> http://www.boost.org/libs/python/doc/v2/operators.html#introduction.
>>
>> Declaration "MTime & MTime::operator--(int arg0) [member_operator]":
>> Function "MTime & MTime::operator--(int arg0) [member_operator]" takes
>> as argument (name=arg0, pos=0 ) non-const reference to C++ fundamental
>> type - function could not be called from Python.
> 
> Matthias, I tried to reproduce this bug, but I cannot. Can you create 
> small test case?

Well, I also get the warnings when I just try to wrap this minimal example:

class Foo
{
   public:
   Foo& operator--(int a);
};

Here are the warnings:

WARNING Declaration "Foo & Foo::operator--(int a) [member_operator]" 
could not be exported.
"operator--" is not supported.
         See Boost.Python documentation: 
http://www.boost.org/libs/python/doc/v2/operators.html#introduction.

WARNING Declaration "Foo & Foo::operator--(int a) [member_operator]": 
Function "Foo & Foo::operator--(int a) [member_operator]" takes as 
argument (name=a, pos=0 ) non-const reference to C++ fundamental type - 
function could not be called from Python.


I don't know if it's of any help but here's the XML output from gccxml 
v0.6.0:

<?xml version="1.0"?>
<GCC_XML>
   <Namespace id="_1" name="::" members="_3 " mangled="_Z2::"/>
   <Namespace id="_2" name="std" context="_1" members="" mangled="_Z3std"/>
   <Class id="_3" name="Foo" context="_1" mangled="3Foo" location="f0:6" 
file="f0" line="6" members="_4 _5 _6 " bases=""/>
   <Constructor id="_4" name="Foo" artificial="1" throw="" context="_3" 
mangled="_ZN3FooC1ERKS_ *INTERNAL* " location="f0:6" file="f0" line="6">
     <Argument name="_ctor_arg" type="_7"/>
   </Constructor>
   <Constructor id="_5" name="Foo" artificial="1" throw="" context="_3" 
mangled="_ZN3FooC1Ev *INTERNAL* " location="f0:6" file="f0" line="6"/>
   <OperatorMethod id="_6" name="--" returns="_8" context="_3" 
mangled="_ZN3FoommEi" location="f0:8" file="f0" line="8" extern="1">
     <Argument name="a" type="_9"/>
   </OperatorMethod>
   <ReferenceType id="_7" type="_3c"/>
   <ReferenceType id="_8" type="_3"/>
   <FundamentalType id="_9" name="int"/>
   <CvQualifiedType id="_3c" type="_3" const="1"/>
   <File id="f0" name="source.h"/>
</GCC_XML>


By the way, the second message does not appear when I remove the 
reference from the return value, so it seems pyplusplus somehow mixes 
those up.


- Matthias -