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move attribute.i to the typemap library, now is usable from all the languages

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@7717 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Marcelo Matus 2005-10-25 13:20:50 +00:00
commit 8be1b7a07c
12 changed files with 251 additions and 159 deletions
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153
Lib/python/attribute.i
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@ -1,152 +1 @@
%{
#include <stdio.h>
%}
%include <pymacros.swg>
/*
Attribute implementation using JOHN E LENZ ideas.
The following macros convert a pair of set/get methods
into a "native" attribute.
Use %attribute when you have a pair of get/set methods
like in:
%attribute(A, int, a, get_a, set_a);
struct A
{
int get_a() const
{
return _a;
}
void set_a(int aa)
{
_a = aa;
}
};
If you don't provide a 'set' method, a 'read-only' attribute
is generated, ie, like in:
%attribute(A, int, c, get_c);
Use %attribute_ref when you have const/non-const reference
access methods, like in:
%attribute_ref(A, int, b);
struct A
{
const int& b() const
{
return _b;
}
int& b()
{
return _b;
}
};
You can also use
%attribute_ref(class, type, refname, attr);
if the internal C++ reference methods have a different name from the
attribute you want.
Then you can use the instances like:
x = A()
x.a = 3 # calls A::set_a
print x.a # calls A::get_a
x.b = 3 # calls A::b()
print x.b # calls A::b() const
NOTE: remember that if the type contains commas, such as
'std::pair<int,int>', you need to use the macro like:
%attribute_ref(A, %arg(std::pair<int,int>), pval);
where %arg() 'normalize' the type to be understood as a single
argument, otherwise the macro will get confused (see the 'cpp'
documentation).
*/
#ifdef __cplusplus
%define %_attribute(Class, Wrap, type, attr, getcode, setcode)
%extend Class {
type attr;
}
%{
template <class C> inline
type Wrap ##_## attr ## _get(const C* _t)
{ return getcode; }
template <class C> inline
void Wrap ##_## attr ## _set(C* _t, type _val)
{ setcode; }
%}
%enddef
#else
%define %_attribute(Class, Wrap, type, attr, getcode, setcode)
%extend Class {
type attr;
}
%{
#define Wrap ##_## attr ## _get(_t) getcode
#define Wrap ##_## attr ## _set(_t, _val) setcode
%}
%enddef
#endif
//
// Internal versions, need Wrap name
//
%define %attribute_T(Class, Wrap, type, attr, get, ...)
%ignore Class::get;
#if #__VA_ARGS__ != ""
%ignore Class::__VA_ARGS__;
%_attribute(%arg(Class), Wrap, %arg(type),
attr, _t->get(), _t->__VA_ARGS__(_val))
#else
%_attribute(%arg(Class), Wrap, %arg(type),
attr, _t->get(),
fprintf(stderr,"'attr' is a read-only attribute"))
#endif
%enddef
%define %_attribute_ref_T(Class, Wrap, type, refname, attr)
%ignore Class::refname();
%ignore Class::refname() const;
%_attribute(%arg(Class), Wrap, %arg(type),
attr, _t->refname(), _t->refname() = _val)
%enddef
%define %attribute_ref_T(Class, Wrap, type, refname, ...)
#if #__VA_ARGS__ == ""
%_attribute_ref_T(%arg(Class), Wrap, %arg(type), refname, refname)
#else
%_attribute_ref_T(%arg(Class), Wrap, %arg(type), refname, __VA_ARGS__)
#endif
%enddef
//
// User versions
//
%define %attribute(Class, type, attr, get, ...)
%attribute_T(%arg(Class), %mangle(Class), %arg(type), attr, get, __VA_ARGS__)
%enddef
%define %attribute_ref(Class, type, refname, ...)
%attribute_ref_T(%arg(Class), %mangle(Class), %arg(type), refname, __VA_ARGS__)
%enddef
%include <typemaps/attribute.swg>