[Swig-devel] [ swig-Bugs-3520002 ] Compiler error with C++ using declarations

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Bugs item #3520002, was opened at 2012-04-20 19:16
Message generated for change (Comment added) made by wsfulton
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Category: code generation (general)
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: HighCommander4 (highcommander4)
Assigned to: Nobody/Anonymous (nobody)
Summary: Compiler error with C++ using declarations

Initial Comment:
I can successfully wrap the following C++ file, called test_vector.hpp:

#include <string>
#include <vector>
using std::string;
using std::vector;
struct S
{
    string      a;
    vector<int> b;
};

using the following interface file:

%module test_vector
%{
#include "test_vector.hpp"
%}  %include "std_vector.i"
%include "std_string.i"
%include "test_vector.hpp"

and the following commands:

swig -php -c++ test_vector.ig++
`php-config5 --includes` -fpic -c test_vector_wrap.cpp

However, if I add an enclosing namespace, as follows:

#include <string>
#include <vector>
namespace N
{
    using std::string;
    using std::vector;
    struct S
    {
        string      a;
        vector<int> b;
    };
}

and try to compile with the same interface file and commands, the second command
gives the following errors:

test_vector_wrap.cpp: In function ‘void _wrap_S_b_set(int, zval*, zval**, zval*, int)’:
test_vector_wrap.cpp:1201:3: error: ‘vector’ was not declared in this scope
test_vector_wrap.cpp:1201:3: note: suggested alternatives:/usr/include/c++/4.6/bits/stl_vector.h:180:11:
note:   ‘std::vector’/usr/include/c++/4.6/bits/stl_vector.h:180:11:
note:   ‘std::vector’
test_vector_wrap.cpp:1201:11: error: expected primary-expression before ‘int’
test_vector_wrap.cpp:1201:11: error: expected ‘;’ before ‘int’
test_vector_wrap.cpp:1202:11: error: expected primary-expression before ‘int’
test_vector_wrap.cpp:1202:11: error: expected ‘;’ before ‘int’
test_vector_wrap.cpp:1217:8: error: ‘tmp2’ was not declared in this scope
test_vector_wrap.cpp:1220:5: error: ‘arg2’ was not declared in this scope
test_vector_wrap.cpp:1220:13: error: ‘tmp2’ was not declared in this scope
test_vector_wrap.cpp:1222:25: error: ‘arg2’ was not declared in this scope
test_vector_wrap.cpp: In function ‘void _wrap_S_b_get(int, zval*, zval**, zval*, int)’:
test_vector_wrap.cpp:1233:3: error: ‘vector’ was not declared in this scope
test_vector_wrap.cpp:1233:3: note: suggested alternatives:
/usr/include/c++/4.6/bits/stl_vector.h:180:11: note:   ‘std::vector’
/usr/include/c++/4.6/bits/stl_vector.h:180:11: note:   ‘std::vector’
test_vector_wrap.cpp:1233:11: error: expected primary-expression before ‘int’
test_vector_wrap.cpp:1233:11: error: expected ‘;’ before ‘int’
test_vector_wrap.cpp:1246:3: error: ‘result’ was not declared in this scope
test_vector_wrap.cpp:1248:13: error: expected primary-expression before ‘int’
test_vector_wrap.cpp:1248:13: error: expected ‘;’ before ‘int’
test_vector_wrap.cpp:1249:5: error: ‘resultobj’ was not declared in this scope

Interestingly, I do not get any errors about string, even though my code treatsstring and vector exactly the same.

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>Comment By: William Fulton (wsfulton)
Date: 2012-06-30 12:44

Message:
Looks related to #3497393

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Comment By: William Fulton (wsfulton)
Date: 2012-04-28 07:38

Message:
There are a few simiilar bugs wrt using 'using'. Workaround is to avoid it
for now.

----------------------------------------------------------------------

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