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Extract implemented

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[SVN r14510]
This commit is contained in:
Dave Abrahams
2002-07-18 05:00:34 +00:00
parent a6c859c9cc
commit a9baa519f3
14 changed files with 568 additions and 109 deletions
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98
src/converter/from_python.cpp
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@@ -77,14 +77,19 @@ BOOST_PYTHON_DECL void* rvalue_result_from_python(
// Look for an eligible converter
data = rvalue_from_python_stage1(src, converters);
return rvalue_from_python_stage2(src, data, converters);
}
BOOST_PYTHON_DECL void* rvalue_from_python_stage2(
PyObject* source, rvalue_from_python_stage1_data& data, registration const& converters)
{
if (!data.convertible)
{
handle<> msg(
::PyString_FromFormat(
"No registered converter was able to produce a C++ rvalue of type %s from this Python object of type %s"
, converters.target_type.name()
, src->ob_type->tp_name
, source->ob_type->tp_name
));
PyErr_SetObject(PyExc_TypeError, msg.get());
@@ -94,7 +99,7 @@ BOOST_PYTHON_DECL void* rvalue_result_from_python(
// If a construct function was registered (i.e. we found an
// rvalue conversion), call it now.
if (data.construct != 0)
data.construct(src, &data);
data.construct(source, &data);
// Return the address of the resulting C++ object
return data.convertible;
@@ -165,37 +170,66 @@ BOOST_PYTHON_DECL rvalue_from_python_chain const* implicit_conversion_chain(
return chain;
}
namespace
{
void throw_no_lvalue_from_python(PyObject* source, registration const& converters, char const* ref_type)
{
handle<> msg(
::PyString_FromFormat(
"No registered converter was able to extract a C++ %s to type %s"
" from this Python object of type %s"
, ref_type
, converters.target_type.name()
, source->ob_type->tp_name
));
PyErr_SetObject(PyExc_TypeError, msg.get());
throw_error_already_set();
}
void* lvalue_result_from_python(
PyObject* source
, registration const& converters
, char const* ref_type)
{
handle<> holder(source);
if (source->ob_refcnt <= 2)
{
handle<> msg(
::PyString_FromFormat(
"Attempt to return dangling %s to object of type: %s"
, ref_type
, converters.target_type.name()));
PyErr_SetObject(PyExc_ReferenceError, msg.get());
throw_error_already_set();
}
void* result = get_lvalue_from_python(source, converters);
if (!result)
(throw_no_lvalue_from_python)(source, converters, ref_type);
return result;
}
}
BOOST_PYTHON_DECL void throw_no_pointer_from_python(PyObject* source, registration const& converters)
{
(throw_no_lvalue_from_python)(source, converters, "pointer");
}
BOOST_PYTHON_DECL void throw_no_reference_from_python(PyObject* source, registration const& converters)
{
(throw_no_lvalue_from_python)(source, converters, "reference");
}
BOOST_PYTHON_DECL void* reference_result_from_python(
PyObject* source
, registration const& converters)
{
handle<> holder(source);
if (source->ob_refcnt <= 2)
{
handle<> msg(
::PyString_FromFormat(
"Attempt to return dangling pointer/reference to object of type: %s"
, converters.target_type.name()));
PyErr_SetObject(PyExc_ReferenceError, msg.get());
throw_error_already_set();
}
void* result = get_lvalue_from_python(source, converters);
if (!result)
{
handle<> msg(
::PyString_FromFormat(
"No registered converter was able to extract a a C++ lvalue of type %s from this Python object of type %s"
, converters.target_type.name()
, source->ob_type->tp_name
));
PyErr_SetObject(PyExc_TypeError, msg.get());
throw_error_already_set();
}
return result;
return (lvalue_result_from_python)(source, converters, "reference");
}
BOOST_PYTHON_DECL void* pointer_result_from_python(
@@ -207,7 +241,7 @@ BOOST_PYTHON_DECL void* pointer_result_from_python(
Py_DECREF(source);
return 0;
}
return reference_result_from_python(source, converters);
return (lvalue_result_from_python)(source, converters, "pointer");
}
BOOST_PYTHON_DECL void throw_no_class_registered()
@@ -231,7 +265,7 @@ pytype_result_from_python(PyTypeObject* type_, PyObject* source)
handle<> keeper(source);
handle<> msg(
::PyString_FromFormat(
"Expecting a Python %s return type, but got an object of type %s instead"
"Expecting an object of type %s; got an object of type %s instead"
, type_->tp_name
, source->ob_type->tp_name
));