Commit 10a2c693 authored by Xavier Thompson's avatar Xavier Thompson

WIP cypclass method wrapping

parent 507826e1
......@@ -1635,52 +1635,85 @@ class CppClassNode(CStructOrUnionDefNode, BlockNode):
self.cyp_wrapper.body.stats.append(py_method_wrapper)
def synthesize_cypclass_method_wrapper(self, cfunc_method):
from .CypclassWrapper import underlying_name, cycplass_special_entry_names
if cfunc_method.is_static_method:
return # for now skip static methods
# C++ methods have an implict 'this', so the 'self' argument is skipped in the declarator
skipped_self = cfunc_method.cfunc_declarator.skipped_self
if not skipped_self:
return # if this ever happens (?), skip non-static methods without a self argument
from .CypclassWrapper import underlying_name, cycplass_special_entry_names
from . import ExprNodes
cfunc_declarator = cfunc_method.cfunc_declarator
py_name = cfunc_method.entry.name
# transform e.g. <init> back into __init__
# > name of the wrapping method: same name
cfunc_name = cfunc_method.entry.name
py_name = cfunc_name
try:
# transform e.g. <init> back into __init__
py_name = cycplass_special_entry_names[py_name]
except KeyError:
# no need to transform this name
pass
py_args = [arg.clone_node() for arg in cfunc_declarator.args]
py_doc = cfunc_method.doc
# > self argument of the wrapper method: same name, but type of the wrapper cclass
self_name, self_type, self_pos, self_arg = skipped_self
py_self_arg = CArgDeclNode(
self_pos,
base_type = CSimpleBaseTypeNode(
self_pos,
name = self.cyp_wrapper.class_name,
module_path = [],
signed = 1,
is_basic_c_type = 0,
longness = 0,
is_self_arg = 0, # only true for C methods
templates = None
),
declarator = CNameDeclaratorNode(self_pos, name=self_name, cname=None),
not_none = 0,
or_none = 0,
default = None,
annotation = None,
kw_only = 0
)
arg_names = [arg.name for arg in py_args]
# > all arguments of the wrapper method declaration
py_args = [py_self_arg]
for arg in cfunc_declarator.args:
py_args.append(arg.clone_node())
# C++ methods have an implict 'this', so the 'self' argument is skipped in the declarator
skipped_self = cfunc_method.cfunc_declarator.skipped_self
if not skipped_self:
return # if this ever happens (?), skip non-static methods without a self argument
from . import ExprNodes
# > same docstring
py_doc = cfunc_method.doc
# > names of the arguments passed when calling the underlying method; self not included
arg_objs = [ExprNodes.NameNode(arg.pos, name=arg.name) for arg in cfunc_declarator.args]
# self_name, self_type, self_pos, self_arg = skipped_self
type_entry = self.cyp_wrapper.entry
type_arg = ExprNodes.NameNode(self.pos, name=type_entry.name)
type_arg.entry = type_entry
# > reference to the self argument of the wrapper method
self_obj = ExprNodes.NameNode(self_pos, name=self_name)
cfunc = ExprNodes.AttributeNode(cfunc_method.pos, obj=type_arg, attribute=underlying_name)
# > access the method of the underlying cyobject from the self argument of the wrapper method
underlying_obj = ExprNodes.AttributeNode(cfunc_method.pos, obj=self_obj, attribute=underlying_name)
cfunc = ExprNodes.AttributeNode(cfunc_method.pos, obj=underlying_obj, attribute=cfunc_name)
# > call to the underlying method
c_call = ExprNodes.SimpleCallNode(
cfunc_method.pos,
function=cfunc,
args=[ExprNodes.NameNode(cfunc_method.pos, name=n) for n in arg_names]
args=arg_objs
)
# > return the result of the call if the underlying return type is not void
if cfunc_method.type.return_type.is_void:
py_stat = ExprStatNode(pos=cfunc_method.pos, expr=c_call)
else:
py_stat = ReturnStatNode(pos=cfunc_method.pos, return_type=PyrexTypes.py_object_type, value=c_call)
py_body = StatListNode(cfunc_method.pos, stats=[py_stat])
# > the wrapper method
return DefNode(
cfunc_method.pos,
name = py_name,
......
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