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Re: [Swig-user] typedef / %rename problem in struct
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From: MakaMaka <xfr...@ya...> - 2009-10-20 16:35:02
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Ok, I added the typedef and while it solves the initial problem, it creates
another:
Error 1 error C2273: 'function-style cast' : illegal as right side of '->'
operator
Which is in response to this swig generated wrapper:
SWIGINTERN PyObject *_wrap_outer__inner_get(PyObject *SWIGUNUSEDPARM(self),
PyObject *args) {
PyObject *resultobj = 0;
outer *arg1 = (outer *) 0 ;
void *argp1 = 0 ;
int res1 = 0 ;
PyObject * obj0 = 0 ;
outer__inner *result = 0 ;
if (!PyArg_ParseTuple(args,(char *)"O:outer__inner_get",&obj0)) SWIG_fail;
res1 = SWIG_ConvertPtr(obj0, &argp1,SWIGTYPE_p_outer, 0 | 0 );
if (!SWIG_IsOK(res1)) {
SWIG_exception_fail(SWIG_ArgError(res1), "in method '"
"outer__inner_get" "', argument " "1"" of type '" "outer *""'");
}
arg1 = reinterpret_cast< outer * >(argp1);
result = (outer__inner *)& ((arg1)->_inner);
resultobj = SWIG_NewPointerObj(SWIG_as_voidptr(result),
SWIGTYPE_p_outer__inner, 0 | 0 );
return resultobj;
fail:
return NULL;
}
This line:
result = (outer__inner *)& ((arg1)->_inner)
is causing the problem - specifically the _inner. What's happening as far
as I can tell is that SWIG is trying to generate a wrapper allowing access
to _inner now, which is a type not a value, so it's illegal.
Is there a way to tell swig not to do this? I've tried %ignore
outer::__inner to no avail, but perhaps I'm doing it wrong.
Thanks.
David Piepgrass wrote:
>
>> Hi,
>> I'm having trouble wrapping a more complicated version of the code
>> below.
>> Specifically, SWIG is defining an outer__inner struct, but using _inner
>> as
>> the type for inner in the set / get methods it generates. I've tried
>> to
>> explicitly %rename _inner to outer__inner but SWIG is ignore the
>> directive
>> for some reason.
>>
>> Does anybody know a way around this problem, short of redefining the
>> struct
>> (that's not an option as the struct is autogenerated as part of a much,
>> much
>> larger project that I have little control over)?
>
> Sounds like a bug to me. However, %rename is behaving correctly: it
> renames the symbol in the target language, it does not change references
> to the symbol on the C/C++ side.
>
> Try this workaround:
>
> %{
> #include "pytest.h"
> typedef outer::_inner _inner;
> %}
>
>> pytest.i
>> -------------------------------
>> %module pytest
>> %{
>> #include "pytest.h"
>> %}
>>
>> %include "pytest.h"
>> -------------------------------
>>
>> pytest.h
>> -------------------------------
>> typedef unsigned char UINT8;
>>
>> struct outer {
>>
>> typedef struct __inner {
>> UINT8 Mode: 2;
>> UINT8 State: 2;
>> UINT8 Fire: 1;
>> UINT8 Spare: 3;
>> } _inner;
>>
>> _inner inner;
>> };
>> -------------------------------
>>
>> ||=== pytest, Debug ===|
>> pytest_wrap.cxx||In function `PyObject*
>> _wrap_outer_inner_set(PyObject*,
>> PyObject*)':|
>> pytest_wrap.cxx|2973|error: `_inner' was not declared in this scope|
>> pytest_wrap.cxx|2973|error: expected `;' before "arg2"|
>> pytest_wrap.cxx|2995|error: `temp' was not declared in this scope|
>> pytest_wrap.cxx|2995|error: `_inner' is not a type|
>> pytest_wrap.cxx|2995|error: expected `>' before '*' token|
>> pytest_wrap.cxx|2995|error: expected `(' before '*' token|
>> pytest_wrap.cxx|2995|error: expected primary-expression before '>'
>> token|
>> pytest_wrap.cxx|2995|error: expected `)' before ';' token|
>> pytest_wrap.cxx|2996|error: `arg2' was not declared in this scope|
>> pytest_wrap.cxx|2997|error: type `<type error>' argument given to
>> `delete',
>> expected pointer|
>> pytest_wrap.cxx|2996|warning: unused variable 'arg2'|
>> pytest_wrap.cxx|3000|error: `arg2' was not declared in this scope|
>> pytest_wrap.cxx|3000|warning: unused variable 'arg2'|
>> pytest_wrap.cxx||In function `PyObject*
>> _wrap_outer_inner_get(PyObject*,
>> PyObject*)':|
>> pytest_wrap.cxx|3014|error: `_inner' was not declared in this scope|
>> pytest_wrap.cxx|3014|error: expected `;' before "result"|
>> pytest_wrap.cxx|3022|error: `result' was not declared in this scope|
>> pytest_wrap.cxx|3023|error: `_inner' is not a type|
>> pytest_wrap.cxx|3023|error: ISO C++ forbids declaration of `type name'
>> with
>> no type|
>> pytest_wrap.cxx|3023|error: expected `>' before "_inner"|
>> pytest_wrap.cxx|3023|error: expected `(' before "_inner"|
>> pytest_wrap.cxx|3023|error: expected primary-expression before '>'
>> token|
>> pytest_wrap.cxx||In function `PyObject*
>> _wrap_outer__inner_get(PyObject*,
>> PyObject*)':|
>> pytest_wrap.cxx|3044|error: invalid use of `outer::_inner'|
>> ||=== Build finished: 20 errors, 2 warnings ===|
>> --
>> View this message in context: http://www.nabble.com/typedef----rename-
>> problem-in-struct-tp25931898p25931898.html
>> Sent from the swig-user mailing list archive at Nabble.com.
>>
>>
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>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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>
>
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View this message in context: http://www.nabble.com/typedef----rename-problem-in-struct-tp25931898p25978397.html
Sent from the swig-user mailing list archive at Nabble.com.
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