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Add simple PySwigObject to handle the C/C++ instance pointers,

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instead of using PyCObject or plain strings.

The new PySwigObject is even safer than PyCObject, and
more friendly than plain strings:

now you can do

  print a.this
  <Swig Object at _00691608_p_A>

  print str(a.this)
  _00691608_p_A

  print long(a.this)
  135686400

  print "%s 0x%x" % (a.this, a.this)
  _00691608_p_A 0x8166900


the last one is very useful when debugging the C/C++ side, since
is the pointer value you will usually get from the debugger.

Also, if you have some old code that uses the string representation
"_00691608_p_A", you can use it now again by calling str(ptr), or
maybe nothing special by just calling PyString_AsString(..).

This change is mainly for nostalgic swig users that miss the
string representation, but also allows to say again

  if a.this == b.this:
    return "a is b"

and well, since the change were really simple, maybe in the future
we will be able to do

    next = a.this + 1

or add native python iteration over native C/C++ arrays, ie, no
need to create/copy new tuples when returning and array or vector.


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@6759 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Marcelo Matus 2004-11-19 20:40:20 +00:00
commit 0881d3c861
6 changed files with 384 additions and 44 deletions
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8
Lib/python/pyinit.swg
View file

@ -169,8 +169,8 @@ SWIG_Python_addvarlink(PyObject *p, char *name, PyObject *(*get_attr)(void), int
/* Install Constants */
static void
SWIG_Python_InstallConstants(PyObject *d, swig_const_info constants[]) {
int i;
PyObject *obj;
PyObject *obj = 0;
size_t i;
for (i = 0; constants[i].type; i++) {
switch(constants[i].type) {
case SWIG_PY_INT:
@ -213,7 +213,7 @@ SWIG_Python_FixMethods(PyMethodDef *methods,
swig_const_info *const_table,
swig_type_info **types,
swig_type_info **types_initial) {
int i;
size_t i;
for (i = 0; methods[i].ml_name; ++i) {
char *c = methods[i].ml_doc;
if (c && (c = strstr(c, "swig_ptr: "))) {
@ -239,7 +239,7 @@ SWIG_Python_FixMethods(PyMethodDef *methods,
buff += ldoc;
strncpy(buff, "swig_ptr: ", 10);
buff += 10;
SWIG_Python_PointerStr(buff, ptr, ty->name, lptr);
SWIG_PackVoidPtr(buff, ptr, ty->name, lptr);
methods[i].ml_doc = ndoc;
}
}