def WrapClass(self, c, unused_ln, cpp_namespace, unused_class_ns=''):
"""Process AST.ClassDecl c."""
cname = Ident(c.name.cpp_name)
pyname = c.name.native
self.Add(Context(cname, pyname, c.name.cpp_name))
ns = self.class_namespace
yield ''
yield 'namespace %s {' % ns
virtual, has_iterator = _IsSpecialClass(c, pyname)
if virtual:
for s in gen.VirtualOverriderClass(
VIRTUAL_OVERRIDER_CLASS,
pyname,
c.name.cpp_name,
c.name.cpp_name + '::' + cname,
c.cpp_abstract,
Ident,
vfuncs=virtual,
pcfunc=lambda t, tm=self.typemap: postconv.Initializer(
t, tm)):
yield s
c.bases.add().cpp_name = c.name.cpp_name
# Flag that we're now in the nested __iter__ class.
iter_class = (pyname == _ITER_KW)
for s in gen.WrapperClassDef(
WRAPPER_CLASS_NAME,
is_iter=iter_class,
has_iter=has_iterator,
iter_ns=_ClassNamespace(_ITER_KW),
cname=c.name.cpp_name,
ctype=VIRTUAL_OVERRIDER_CLASS if virtual else c.name.cpp_name,
enable_instance_dict=c.enable_instance_dict):
yield s
tracked_slot_groups = {}
cpp_has_ext_def_ctor = False
if iter_class:
# Special-case nested __iter__ class.
for s in _WrapIterSubclass(c.members, self.typemap):
yield s
tp_slots = {
'tp_flags': ['Py_TPFLAGS_DEFAULT'],
'tp_iter': 'PyObject_SelfIter',
'tp_iternext': gen.IterNext.name
}
ctor = None
else:
# Normal class generator.
if c.final:
self.final = True
else:
yield ''
yield 'static %s* ThisPtr(PyObject*);' % c.name.cpp_name
ctor = ('DEF' if c.cpp_has_def_ctor and
(not c.cpp_abstract or virtual) else None)
for d in c.members:
if d.decltype == d.FUNC:
f = d.func
if f.name.native == '__init__':
if virtual:
# Constructors are not virtual, but we mark the constructor as
# virtual to indicate that there exist virtual functions in the
# Clif class declaration.
f.virtual = True
if not f.params:
if f.is_extend_method:
cpp_has_ext_def_ctor = True
else:
# Skip generating wrapper function for unextended default
# ctor. But wrapper function for extended default ctor is still
# necessary.
continue
ctor = 'wrap%s_as___init__' % types.Mangle(cname)
elif c.cpp_abstract and f.virtual:
continue # Skip calling virtual func from the abstract base class.
for s in self.WrapDecl(d, parent_ns=cpp_namespace,
class_ns=ns):
yield s
if virtual and not ctor:
raise ValueError(
'A constructor should be declared in the Clif wrapper for %s as it '
'has virtual method declarations.' % c.name.cpp_name)
# For Py2 slots.py relies on Py_TPFLAGS_DEFAULT being set.
tp_slots = {'tp_flags': ['Py_TPFLAGS_DEFAULT']}
if c.cpp_abstract:
tp_slots['tp_flags'].append('Py_TPFLAGS_IS_ABSTRACT')
if not self.py3output:
tp_slots['tp_flags'].append('Py_TPFLAGS_CHECKTYPES')
if not c.final:
tp_slots['tp_flags'].append('Py_TPFLAGS_BASETYPE')
if has_iterator:
n = _ClassNamespace(_ITER_KW) + '::'
w = n + WRAPPER_CLASS_NAME
# Python convention to have a type struct named FOO_Type.
for s in gen.NewIter(_GetCppObj(), n, w, w + '_Type'):
yield s
tp_slots['tp_iter'] = gen.NewIter.name
if self.properties or c.enable_instance_dict:
yield ''
for s in gen.GetSetDef(self.properties,
c.enable_instance_dict):
yield s
tp_slots['tp_getset'] = gen.GetSetDef.name
for b in c.bases:
if b.cpp_name and not b.native:
p = b.cpp_name
w = 'as_' + types.Mangle(p) # pyname == cname == w
for s in gen.CastAsCapsule(_GetCppObj(), p, w):
yield s
self.methods.append((w, w, NOARGS, 'Upcast to %s*' % p))
_AppendReduceExIfNeeded(self.methods)
if self.methods:
for s in slots.GenSlots(self.methods,
tp_slots,
py3=self.py3output,
tracked_groups=tracked_slot_groups):
yield s
if self.methods: # If all methods are slots, it's empty.
for s in gen.MethodDef(self.methods):
yield s
tp_slots['tp_methods'] = gen.MethodDef.name
qualname = '.'.join(f.pyname for f in self.nested)
tp_slots['tp_name'] = '"%s.%s"' % (self.path, qualname)
if c.docstring:
docstring = c.docstring.strip()
# Escape characters for inclusion in the raw C string.
if str is bytes: # PY2
docstring = docstring.encode('unicode-escape')
docstring = docstring.replace('\n', r'\n')
docstring = docstring.replace('"', r'\"')
tp_slots['tp_doc'] = '"%s"' % docstring
if c.async_dtor and c.cpp_has_trivial_dtor:
raise ValueError(
'Class %s has a trivial dtor yet @async__del__ decorator' %
pyname)
# Python convention to have a type struct named FOO_Type.
# Generate wrapper Type object in wname+'_Type' static var.
for s in gen.TypeObject(
qualname,
tracked_slot_groups,
tp_slots,
pyname,
ctor,
wname=WRAPPER_CLASS_NAME,
fqclassname=c.name.cpp_name,
abstract=c.cpp_abstract,
iterator=_GetCppObj('iter') if iter_class else None,
trivial_dtor=c.cpp_has_trivial_dtor,
subst_cpp_ptr=VIRTUAL_OVERRIDER_CLASS if virtual else '',
enable_instance_dict=c.enable_instance_dict,
cpp_has_ext_def_ctor=cpp_has_ext_def_ctor):
yield s
if not iter_class:
for s in types.GenThisPointerFunc(c.name.cpp_name,
WRAPPER_CLASS_NAME, c.final):
yield s
yield ''
yield '} // namespace ' + ns
type_dict = self.dict
wrapns = '::'.join(f.class_namespace for f in self.nested) + '::'
wclass = wrapns + WRAPPER_CLASS_NAME
vclass = wrapns + VIRTUAL_OVERRIDER_CLASS
# Python convention to have a type struct named FOO_Type.
wtype = wclass + '_Type'
self.DropContext()
base, wrapped_base = _ProcessInheritance(
c.bases, '::%s_Type' % WRAPPER_CLASS_NAME, self.namemap)
self.types_init.append((wtype, base, wrapped_base, type_dict))
if iter_class:
if base:
raise TypeError(
"__iter__ class can't be derived, base '%s' found" % base)
else:
self.dict.append((pyname, types.AsPyObj(wtype)))
self.types.append(
types.ClassType(c.name.cpp_name,
qualname,
wclass,
wtype,
wrapns,
can_copy=c.cpp_copyable and not c.cpp_abstract,
can_move=c.cpp_movable and not c.cpp_abstract,
can_destruct=c.cpp_has_public_dtor,
virtual=vclass if virtual else '',
ns=cpp_namespace))
def WrapClass(self, c, unused_ln, cpp_namespace):
"""Process AST.ClassDecl c."""
cname = Ident(c.name.cpp_name)
pyname = c.name.native
self.Add(Context(cname, pyname, c.name.cpp_name))
ns = self.class_namespace
yield ''
yield 'namespace %s {' % ns
virtual = False
# If c has @virtual members, generate a derived redirector class.
for d in c.members:
if d.decltype == d.FUNC and d.func.virtual:
if not virtual:
yield ''
yield 'struct %s : PyObj, %s {' % (VIRTUAL_OVERRIDER_CLASS,
c.name.cpp_name)
yield I + 'using %s::%s;' % (c.name.cpp_name, cname)
virtual = True
for s in gen.VirtualFunctionCall(
Ident(d.func.name.cpp_name), d.func, pyname,
c.cpp_abstract, lambda atype: postconv.Initializer(
atype, self.typemap)):
yield s
if virtual:
if c.final:
raise ValueError("Final class %s can't have virtual methods." %
pyname)
yield '};'
b = c.bases.add()
b.cpp_name = c.name.cpp_name
yield ''
yield 'struct %s {' % self.wrapper_class_name
yield I + 'PyObject_HEAD'
yield I + '::clif::SharedPtr<%s> cpp;' % (VIRTUAL_OVERRIDER_CLASS if
virtual else c.name.cpp_name)
yield '};'
if c.final:
self.final = True
else:
yield 'static %s* ThisPtr(PyObject*);' % c.name.cpp_name
ctor = ('DEF' if c.cpp_has_def_ctor and
(not c.cpp_abstract or virtual) else None)
for d in c.members:
if d.decltype == d.FUNC:
f = d.func
if f.name.native == '__init__':
if virtual:
# Constructors are not virtual, but we mark the constructor as
# virtual to indicate that there exist virtual functions in the
# Clif class declaration.
f.virtual = True
if not f.params:
continue # Skip generating wrapper function for default ctor.
ctor = 'wrap%s_as___init__' % types.Mangle(cname)
elif c.cpp_abstract and f.virtual:
continue # Skip calling virtual func from the abstract base class.
for s in (self.WrapDecl(d, cpp_namespace)):
yield s
if virtual and not ctor:
raise ValueError(
'A constructor should be declared in the Clif wrapper for %s as it '
'has virtual method declarations.' % c.name.cpp_name)
# For Py2 slots.py relies on Py_TPFLAGS_DEFAULT being set.
tp_slots = {
'tp_flags': ['Py_TPFLAGS_DEFAULT', 'Py_TPFLAGS_TYPE_SUBCLASS']
}
if c.cpp_abstract:
tp_slots['tp_flags'].append('Py_TPFLAGS_IS_ABSTRACT')
if not self.py3output:
tp_slots['tp_flags'].append('Py_TPFLAGS_CHECKTYPES')
if not c.final: tp_slots['tp_flags'].append('Py_TPFLAGS_BASETYPE')
if self.properties:
for s in (gen.GetSetDef(self.properties)):
yield s
tp_slots['tp_getset'] = gen.GetSetDef.name
for b in c.bases:
if b.cpp_name and not b.native:
p = b.cpp_name
w = 'as_' + types.Mangle(p) # pyname == cname == w
yield ''
yield '// Implicit cast this as %s*' % p
yield 'static PyObject* %s(PyObject* self) {' % w
yield I + ('%s* p = ::clif::python::Get(reinterpret_cast<%s*>('
'self)->cpp);' % (p, self.wrapper_class_name))
yield I + 'if (p == nullptr) return nullptr;'
yield I + ('return PyCapsule_New(p, C("%s"), nullptr);') % p
yield '}'
self.methods.append((w, w, NOARGS, 'Upcast to %s*' % p))
if self.methods:
for s in (slots.GenSlots(self.methods,
tp_slots,
py3=self.py3output)):
yield s
if self.methods: # If all methods are slots, it's empty.
for s in (gen.MethodDef(self.methods)):
yield s
tp_slots['tp_methods'] = gen.MethodDef.name
pypath = '.'.join(f.pyname for f in self.nested)
tp_slots['tp_name'] = '"%s.%s"' % (self.path, pypath)
for s in (
# Generate wrapper Type object in wname+'_Type' static var.
gen.TypeObject(
tp_slots,
slots.GenTypeSlots,
pyname,
ctor=ctor,
wname=self.wrapper_class_name,
fqclassname=c.name.cpp_name,
abstract=c.cpp_abstract,
subst_cpp_ptr=VIRTUAL_OVERRIDER_CLASS if virtual else '',
async_dtor=c.async_dtor,
)):
yield s
for s in types.GenThisPointerFunc(c.name.cpp_name,
self.wrapper_class_name, c.final):
yield s
yield '} // namespace ' + ns
type_dict = self.dict
wrapns = '::'.join(f.class_namespace for f in self.nested) + '::'
wclass = wrapns + self.wrapper_class_name
vclass = wrapns + VIRTUAL_OVERRIDER_CLASS
wrap = '::' + self.wrapper_class_name
wtype = wclass + '_Type'
wrapt = wrap + '_Type'
self.DropContext()
base = cpp_replacement = None
if c.bases:
# Pytd fills bases with native name (cpp_name='') for Python inheritance.
# Matcher extends it with cpp_name (native=='') for C++ parent classes.
base = [b.native for b in c.bases if b.native and not b.cpp_name]
if base:
if len(base) > 1:
raise ValueError('Multiple inheritance not supported')
base = base[0]
if '.' not in base:
# base defined in the same .clif wrapper
base = _ClassNamespace(base) + wrapt
elif c.bases[0].native == 'replacement':
assert c.bases[0].cpp_name
cpp_replacement = c.bases[0].cpp_name
self.types_init.append((wtype, base, type_dict))
self.dict.append(
(pyname, types.AsPyObj(self.wrap_namespace + '::' + wtype)))
if cpp_replacement:
# Find replacement class namespace.
for b in c.cpp_bases:
if b.name == cpp_replacement:
cpp_namespace = b.namespace
break
else:
cpp_namespace = ''
self.types.add(
types.ClassType(c.name.cpp_name,
pypath,
wclass,
wtype,
wrapns,
can_copy=c.cpp_copyable and not c.cpp_abstract,
can_destruct=c.cpp_has_public_dtor,
down_cast=cpp_replacement,
virtual=vclass if virtual else '',
ns=cpp_namespace))