我有一个像这样的函数定义:
void Foo(int szData,int Data []);
我有一个像这样的SWIG类型图:
%typemap(in) (int szData,int Data[])
{
int i;
if (!PyTuple_Check($input))
{
PyErr_SetString(PyExc_TypeError,"Expecting a tuple for this parameter");
$1 = 0;
}
else
$1 = PyTuple_Size($input);
$2 = (int *) malloc(($1+1)*sizeof(int));
for (i =0; i < $1; i++)
{
PyObject *o = PyTuple_GetItem($input,i);
if (!PyInt_Check(o))
{
free ($2);
PyErr_SetString(PyExc_ValueError,"Expecting a tuple of integers");
return NULL;
}
$2[i] = PyInt_AsLong(o);
}
$2[i] = 0;
}
typemap允许我从Python调用Foo(),如下所示: FOO((1,2,3))
这非常有效,直到我添加一个重载函数,例如: int Foo(double t);
一切都很好,但现在当我从Python调用Foo()时,我得到了:
NotImplementedError: Wrong number or type of arguments for overloaded function 'Foo'.
Possible C/C++ prototypes are:
Foo(int,int [])
Foo(double)
如果我删除了typemap(in),那么它也能正常工作。
感谢任何人有任何想法,因为我完全被难过......
答案 0 :(得分:5)
重命名SWIG接口文件中的typemapped函数。 SWIG确实支持多态,但它在将元组与C类型匹配时存在问题。这是我的界面:
%module demo
%begin %{
#pragma warning(disable:4127 4100 4211 4706)
%}
%{
#include <iostream>
void Foo(int size, int data[]) { std::cout << __FUNCSIG__ << std::endl; }
void Foo(double d) { std::cout << __FUNCSIG__ << std::endl; }
void Foo(int a,int b) { std::cout << __FUNCSIG__ << std::endl; }
void Foo(int a) { std::cout << __FUNCSIG__ << std::endl; }
%}
%typemap(in) (int szData,int Data[])
{
int i;
if (!PyTuple_Check($input))
{
PyErr_SetString(PyExc_TypeError,"Expecting a tuple for this parameter");
$1 = 0;
}
else
$1 = (int)PyTuple_Size($input);
$2 = (int *) malloc(($1+1)*sizeof(int));
for (i =0; i < $1; i++)
{
PyObject *o = PyTuple_GetItem($input,i);
if (!PyInt_Check(o))
{
free ($2);
PyErr_SetString(PyExc_ValueError,"Expecting a tuple of integers");
return NULL;
}
$2[i] = PyInt_AsLong(o);
}
$2[i] = 0;
}
void Foo(int a, int b);
void Foo(double d);
void Foo(int a);
%rename Foo Foot;
void Foo(int szData,int Data[]);
使用Visual Studio 2012进行构建和测试:
C:\Demo>swig -c++ -python demo.i && cl /nologo /LD /W4 /EHsc demo_wrap.cxx /Fe_demo.pyd /Ic:\python33\include -link /LIBPATH:c:\python33\libs && python -i demo.py
demo_wrap.cxx
Creating library _demo.lib and object _demo.exp
>>> Foo(1)
void __cdecl Foo(int)
>>> Foo(1,1)
void __cdecl Foo(int,int)
>>> Foo(1.5)
void __cdecl Foo(double)
>>> Foot((1,2,3))
void __cdecl Foo(int,int [])
答案 1 :(得分:1)
扩展Mark Tolonen的答案。
您可以添加到您的 UPDATE [s]
SET [strcol] = NULL
WHERE NOT EXISTS (
SELECT [strcol]
FROM [other]
WHERE [s].[strcol] = [other].[strcol])
文件中:
demo.i
您会得到名称不变的多态性