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#
# Builtin Definitions
#
from __future__ import absolute_import
from .StringEncoding import EncodedString
from .Symtab import BuiltinScope, StructOrUnionScope, ModuleScope, Entry
from .Code import UtilityCode, TempitaUtilityCode
from .TypeSlots import Signature
from . import PyrexTypes
# C-level implementations of builtin types, functions and methods
iter_next_utility_code = UtilityCode.load("IterNext", "ObjectHandling.c")
getattr_utility_code = UtilityCode.load("GetAttr", "ObjectHandling.c")
getattr3_utility_code = UtilityCode.load("GetAttr3", "Builtins.c")
pyexec_utility_code = UtilityCode.load("PyExec", "Builtins.c")
pyexec_globals_utility_code = UtilityCode.load("PyExecGlobals", "Builtins.c")
globals_utility_code = UtilityCode.load("Globals", "Builtins.c")
builtin_utility_code = {
'StopAsyncIteration': UtilityCode.load_cached("StopAsyncIteration", "Coroutine.c"),
}
# mapping from builtins to their C-level equivalents
class _BuiltinOverride(object):
def __init__(self, py_name, args, ret_type, cname, py_equiv="*",
utility_code=None, sig=None, func_type=None,
is_strict_signature=False, builtin_return_type=None,
nogil=None):
self.py_name, self.cname, self.py_equiv = py_name, cname, py_equiv
self.args, self.ret_type = args, ret_type
self.func_type, self.sig = func_type, sig
self.builtin_return_type = builtin_return_type
self.is_strict_signature = is_strict_signature
self.utility_code = utility_code
self.nogil = nogil
def build_func_type(self, sig=None, self_arg=None):
if sig is None:
sig = Signature(self.args, self.ret_type, nogil=self.nogil)
sig.exception_check = False # not needed for the current builtins
func_type = sig.function_type(self_arg)
if self.is_strict_signature:
func_type.is_strict_signature = True
if self.builtin_return_type:
func_type.return_type = builtin_types[self.builtin_return_type]
return func_type
class BuiltinAttribute(object):
def __init__(self, py_name, cname=None, field_type=None, field_type_name=None):
self.py_name = py_name
self.cname = cname or py_name
self.field_type_name = field_type_name # can't do the lookup before the type is declared!
self.field_type = field_type
def declare_in_type(self, self_type):
if self.field_type_name is not None:
# lazy type lookup
field_type = builtin_scope.lookup(self.field_type_name).type
else:
field_type = self.field_type or PyrexTypes.py_object_type
entry = self_type.scope.declare(self.py_name, self.cname, field_type, None, 'private')
entry.is_variable = True
class BuiltinFunction(_BuiltinOverride):
def declare_in_scope(self, scope):
func_type, sig = self.func_type, self.sig
if func_type is None:
func_type = self.build_func_type(sig)
scope.declare_builtin_cfunction(self.py_name, func_type, self.cname,
self.py_equiv, self.utility_code)
class BuiltinMethod(_BuiltinOverride):
def declare_in_type(self, self_type):
method_type, sig = self.func_type, self.sig
if method_type is None:
# override 'self' type (first argument)
self_arg = PyrexTypes.CFuncTypeArg("", self_type, None)
self_arg.not_none = True
self_arg.accept_builtin_subtypes = True
method_type = self.build_func_type(sig, self_arg)
self_type.scope.declare_builtin_cfunction(
self.py_name, method_type, self.cname, utility_code=self.utility_code)
class BuiltinProperty(object):
# read only for now
def __init__(self, py_name, property_type, call_cname,
exception_value=None, exception_check=None, utility_code=None):
self.py_name = py_name
self.property_type = property_type
self.call_cname = call_cname
self.utility_code = utility_code
self.exception_value = exception_value
self.exception_check = exception_check
def declare_in_type(self, self_type):
self_type.scope.declare_cproperty(
self.py_name,
self.property_type,
self.call_cname,
exception_value=self.exception_value,
exception_check=self.exception_check,
utility_code=self.utility_code
)
builtin_function_table = [
# name, args, return, C API func, py equiv = "*"
BuiltinFunction('abs', "d", "d", "fabs",
is_strict_signature=True, nogil=True),
BuiltinFunction('abs', "f", "f", "fabsf",
is_strict_signature=True, nogil=True),
BuiltinFunction('abs', "i", "i", "abs",
is_strict_signature=True, nogil=True),
BuiltinFunction('abs', "l", "l", "labs",
is_strict_signature=True, nogil=True),
BuiltinFunction('abs', None, None, "__Pyx_abs_longlong",
utility_code = UtilityCode.load("abs_longlong", "Builtins.c"),
func_type = PyrexTypes.CFuncType(
PyrexTypes.c_longlong_type, [
PyrexTypes.CFuncTypeArg("arg", PyrexTypes.c_longlong_type, None)
],
is_strict_signature = True, nogil=True)),
] + list(
BuiltinFunction('abs', None, None, "/*abs_{0}*/".format(t.specialization_name()),
func_type = PyrexTypes.CFuncType(
t,
[PyrexTypes.CFuncTypeArg("arg", t, None)],
is_strict_signature = True, nogil=True))
for t in (PyrexTypes.c_uint_type, PyrexTypes.c_ulong_type, PyrexTypes.c_ulonglong_type)
) + list(
BuiltinFunction('abs', None, None, "__Pyx_c_abs{0}".format(t.funcsuffix),
func_type = PyrexTypes.CFuncType(
t.real_type, [
PyrexTypes.CFuncTypeArg("arg", t, None)
],
is_strict_signature = True, nogil=True))
for t in (PyrexTypes.c_float_complex_type,
PyrexTypes.c_double_complex_type,
PyrexTypes.c_longdouble_complex_type)
) + [
BuiltinFunction('abs', "O", "O", "__Pyx_PyNumber_Absolute",
utility_code=UtilityCode.load("py_abs", "Builtins.c")),
#('all', "", "", ""),
#('any', "", "", ""),
#('ascii', "", "", ""),
#('bin', "", "", ""),
BuiltinFunction('callable', "O", "b", "__Pyx_PyCallable_Check",
utility_code = UtilityCode.load("CallableCheck", "ObjectHandling.c")),
#('chr', "", "", ""),
#('cmp', "", "", "", ""), # int PyObject_Cmp(PyObject *o1, PyObject *o2, int *result)
#('compile', "", "", ""), # PyObject* Py_CompileString( char *str, char *filename, int start)
BuiltinFunction('delattr', "OO", "r", "PyObject_DelAttr"),
BuiltinFunction('dir', "O", "O", "PyObject_Dir"),
BuiltinFunction('divmod', "OO", "O", "PyNumber_Divmod"),
BuiltinFunction('exec', "O", "O", "__Pyx_PyExecGlobals",
utility_code = pyexec_globals_utility_code),
BuiltinFunction('exec', "OO", "O", "__Pyx_PyExec2",
utility_code = pyexec_utility_code),
BuiltinFunction('exec', "OOO", "O", "__Pyx_PyExec3",
utility_code = pyexec_utility_code),
#('eval', "", "", ""),
#('execfile', "", "", ""),
#('filter', "", "", ""),
BuiltinFunction('getattr3', "OOO", "O", "__Pyx_GetAttr3", "getattr",
utility_code=getattr3_utility_code), # Pyrex legacy
BuiltinFunction('getattr', "OOO", "O", "__Pyx_GetAttr3",
utility_code=getattr3_utility_code),
BuiltinFunction('getattr', "OO", "O", "__Pyx_GetAttr",
utility_code=getattr_utility_code),
BuiltinFunction('hasattr', "OO", "b", "__Pyx_HasAttr",
utility_code = UtilityCode.load("HasAttr", "Builtins.c")),
BuiltinFunction('hash', "O", "h", "PyObject_Hash"),
#('hex', "", "", ""),
#('id', "", "", ""),
#('input', "", "", ""),
BuiltinFunction('intern', "O", "O", "__Pyx_Intern",
utility_code = UtilityCode.load("Intern", "Builtins.c")),
BuiltinFunction('isinstance', "OO", "b", "PyObject_IsInstance"),
BuiltinFunction('issubclass', "OO", "b", "PyObject_IsSubclass"),
BuiltinFunction('iter', "OO", "O", "PyCallIter_New"),
BuiltinFunction('iter', "O", "O", "PyObject_GetIter"),
BuiltinFunction('len', "O", "z", "PyObject_Length"),
BuiltinFunction('locals', "", "O", "__pyx_locals"),
#('map', "", "", ""),
#('max', "", "", ""),
#('min', "", "", ""),
BuiltinFunction('next', "O", "O", "__Pyx_PyIter_Next",
utility_code = iter_next_utility_code), # not available in Py2 => implemented here
BuiltinFunction('next', "OO", "O", "__Pyx_PyIter_Next2",
utility_code = iter_next_utility_code), # not available in Py2 => implemented here
#('oct', "", "", ""),
#('open', "ss", "O", "PyFile_FromString"), # not in Py3
] + [
BuiltinFunction('ord', None, None, "__Pyx_long_cast",
func_type=PyrexTypes.CFuncType(
PyrexTypes.c_long_type, [PyrexTypes.CFuncTypeArg("c", c_type, None)],
is_strict_signature=True))
for c_type in [PyrexTypes.c_py_ucs4_type, PyrexTypes.c_py_unicode_type]
] + [
BuiltinFunction('ord', None, None, "__Pyx_uchar_cast",
func_type=PyrexTypes.CFuncType(
PyrexTypes.c_uchar_type, [PyrexTypes.CFuncTypeArg("c", c_type, None)],
is_strict_signature=True))
for c_type in [PyrexTypes.c_char_type, PyrexTypes.c_schar_type, PyrexTypes.c_uchar_type]
] + [
BuiltinFunction('ord', None, None, "__Pyx_PyObject_Ord",
utility_code=UtilityCode.load_cached("object_ord", "Builtins.c"),
func_type=PyrexTypes.CFuncType(
PyrexTypes.c_long_type, [
PyrexTypes.CFuncTypeArg("c", PyrexTypes.py_object_type, None)
],
exception_value="(long)(Py_UCS4)-1")),
BuiltinFunction('pow', "OOO", "O", "PyNumber_Power"),
BuiltinFunction('pow', "OO", "O", "__Pyx_PyNumber_Power2",
utility_code = UtilityCode.load("pow2", "Builtins.c")),
#('range', "", "", ""),
#('raw_input', "", "", ""),
#('reduce', "", "", ""),
BuiltinFunction('reload', "O", "O", "PyImport_ReloadModule"),
BuiltinFunction('repr', "O", "O", "PyObject_Repr"), # , builtin_return_type='str'), # add in Cython 3.1
#('round', "", "", ""),
BuiltinFunction('setattr', "OOO", "r", "PyObject_SetAttr"),
#('sum', "", "", ""),
#('sorted', "", "", ""),
#('type', "O", "O", "PyObject_Type"),
BuiltinFunction('unichr', "i", "O", "PyUnicode_FromOrdinal", builtin_return_type='unicode'),
#('unicode', "", "", ""),
#('vars', "", "", ""),
#('zip', "", "", ""),
# Can't do these easily until we have builtin type entries.
#('typecheck', "OO", "i", "PyObject_TypeCheck", False),
#('issubtype', "OO", "i", "PyType_IsSubtype", False),
# Put in namespace append optimization.
BuiltinFunction('__Pyx_PyObject_Append', "OO", "O", "__Pyx_PyObject_Append"),
# This is conditionally looked up based on a compiler directive.
BuiltinFunction('__Pyx_Globals', "", "O", "__Pyx_Globals",
utility_code=globals_utility_code),
]
# Builtin types
# bool
# buffer
# classmethod
# dict
# enumerate
# file
# float
# int
# list
# long
# object
# property
# slice
# staticmethod
# super
# str
# tuple
# type
# xrange
builtin_types_table = [
("type", "PyType_Type", []),
# This conflicts with the C++ bool type, and unfortunately
# C++ is too liberal about PyObject* <-> bool conversions,
# resulting in unintuitive runtime behavior and segfaults.
# ("bool", "PyBool_Type", []),
("int", "PyInt_Type", []),
("long", "PyLong_Type", []),
("float", "PyFloat_Type", []),
("complex", "PyComplex_Type", [BuiltinAttribute('cval', field_type_name = 'Py_complex'),
BuiltinAttribute('real', 'cval.real', field_type = PyrexTypes.c_double_type),
BuiltinAttribute('imag', 'cval.imag', field_type = PyrexTypes.c_double_type),
]),
("basestring", "PyBaseString_Type", [
BuiltinMethod("join", "TO", "T", "__Pyx_PyBaseString_Join",
utility_code=UtilityCode.load("StringJoin", "StringTools.c")),
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("bytearray", "PyByteArray_Type", [
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("bytes", "PyBytes_Type", [BuiltinMethod("join", "TO", "O", "__Pyx_PyBytes_Join",
utility_code=UtilityCode.load("StringJoin", "StringTools.c")),
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("str", "PyString_Type", [BuiltinMethod("join", "TO", "O", "__Pyx_PyString_Join",
builtin_return_type='basestring',
utility_code=UtilityCode.load("StringJoin", "StringTools.c")),
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("unicode", "PyUnicode_Type", [BuiltinMethod("__contains__", "TO", "b", "PyUnicode_Contains"),
BuiltinMethod("join", "TO", "T", "PyUnicode_Join"),
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("tuple", "PyTuple_Type", [BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("list", "PyList_Type", [BuiltinMethod("insert", "TzO", "r", "PyList_Insert"),
BuiltinMethod("reverse", "T", "r", "PyList_Reverse"),
BuiltinMethod("append", "TO", "r", "__Pyx_PyList_Append",
utility_code=UtilityCode.load("ListAppend", "Optimize.c")),
BuiltinMethod("extend", "TO", "r", "__Pyx_PyList_Extend",
utility_code=UtilityCode.load("ListExtend", "Optimize.c")),
BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
utility_code=UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")),
]),
("dict", "PyDict_Type", [BuiltinMethod("__contains__", "TO", "b", "PyDict_Contains"),
BuiltinMethod("has_key", "TO", "b", "PyDict_Contains"),
BuiltinMethod("items", "T", "O", "__Pyx_PyDict_Items",
utility_code=UtilityCode.load("py_dict_items", "Builtins.c")),
BuiltinMethod("keys", "T", "O", "__Pyx_PyDict_Keys",
utility_code=UtilityCode.load("py_dict_keys", "Builtins.c")),
BuiltinMethod("values", "T", "O", "__Pyx_PyDict_Values",
utility_code=UtilityCode.load("py_dict_values", "Builtins.c")),
BuiltinMethod("iteritems", "T", "O", "__Pyx_PyDict_IterItems",
utility_code=UtilityCode.load("py_dict_iteritems", "Builtins.c")),
BuiltinMethod("iterkeys", "T", "O", "__Pyx_PyDict_IterKeys",
utility_code=UtilityCode.load("py_dict_iterkeys", "Builtins.c")),
BuiltinMethod("itervalues", "T", "O", "__Pyx_PyDict_IterValues",
utility_code=UtilityCode.load("py_dict_itervalues", "Builtins.c")),
BuiltinMethod("viewitems", "T", "O", "__Pyx_PyDict_ViewItems",
utility_code=UtilityCode.load("py_dict_viewitems", "Builtins.c")),
BuiltinMethod("viewkeys", "T", "O", "__Pyx_PyDict_ViewKeys",
utility_code=UtilityCode.load("py_dict_viewkeys", "Builtins.c")),
BuiltinMethod("viewvalues", "T", "O", "__Pyx_PyDict_ViewValues",
utility_code=UtilityCode.load("py_dict_viewvalues", "Builtins.c")),
BuiltinMethod("clear", "T", "r", "__Pyx_PyDict_Clear",
utility_code=UtilityCode.load("py_dict_clear", "Optimize.c")),
BuiltinMethod("copy", "T", "T", "PyDict_Copy")]),
("slice", "PySlice_Type", [BuiltinAttribute('start'),
BuiltinAttribute('stop'),
BuiltinAttribute('step'),
]),
# ("file", "PyFile_Type", []), # not in Py3
("set", "PySet_Type", [BuiltinMethod("clear", "T", "r", "PySet_Clear"),
# discard() and remove() have a special treatment for unhashable values
BuiltinMethod("discard", "TO", "r", "__Pyx_PySet_Discard",
utility_code=UtilityCode.load("py_set_discard", "Optimize.c")),
BuiltinMethod("remove", "TO", "r", "__Pyx_PySet_Remove",
utility_code=UtilityCode.load("py_set_remove", "Optimize.c")),
# update is actually variadic (see Github issue #1645)
# BuiltinMethod("update", "TO", "r", "__Pyx_PySet_Update",
# utility_code=UtilityCode.load_cached("PySet_Update", "Builtins.c")),
BuiltinMethod("add", "TO", "r", "PySet_Add"),
BuiltinMethod("pop", "T", "O", "PySet_Pop")]),
("frozenset", "PyFrozenSet_Type", []),
("Exception", "((PyTypeObject*)PyExc_Exception)[0]", []),
("StopAsyncIteration", "((PyTypeObject*)__Pyx_PyExc_StopAsyncIteration)[0]", []),
("memoryview", "PyMemoryView_Type", [
# TODO - format would be nice, but hard to get
# __len__ can be accessed through a direct lookup of the buffer (but probably in Optimize.c)
# error checking would ideally be limited api only
BuiltinProperty("ndim", PyrexTypes.c_int_type, '__Pyx_PyMemoryView_Get_ndim',
exception_value="-1", exception_check=True,
utility_code=TempitaUtilityCode.load_cached(
"memoryview_get_from_buffer", "Builtins.c",
context=dict(name="ndim")
)
),
BuiltinProperty("readonly", PyrexTypes.c_bint_type, '__Pyx_PyMemoryView_Get_readonly',
exception_value="-1", exception_check=True,
utility_code=TempitaUtilityCode.load_cached(
"memoryview_get_from_buffer", "Builtins.c",
context=dict(name="readonly")
)
),
BuiltinProperty("itemsize", PyrexTypes.c_py_ssize_t_type, '__Pyx_PyMemoryView_Get_itemsize',
exception_value="-1", exception_check=True,
utility_code=TempitaUtilityCode.load_cached(
"memoryview_get_from_buffer", "Builtins.c",
context=dict(name="itemsize")
)
)]
)
]
types_that_construct_their_instance = frozenset({
# some builtin types do not always return an instance of
# themselves - these do:
'type', 'bool', 'long', 'float', 'complex',
'bytes', 'unicode', 'bytearray',
'tuple', 'list', 'dict', 'set', 'frozenset',
# 'str', # only in Py3.x
# 'file', # only in Py2.x
'memoryview'
})
builtin_structs_table = [
('Py_buffer', 'Py_buffer',
[("buf", PyrexTypes.c_void_ptr_type),
("obj", PyrexTypes.py_object_type),
("len", PyrexTypes.c_py_ssize_t_type),
("itemsize", PyrexTypes.c_py_ssize_t_type),
("readonly", PyrexTypes.c_bint_type),
("ndim", PyrexTypes.c_int_type),
("format", PyrexTypes.c_char_ptr_type),
("shape", PyrexTypes.c_py_ssize_t_ptr_type),
("strides", PyrexTypes.c_py_ssize_t_ptr_type),
("suboffsets", PyrexTypes.c_py_ssize_t_ptr_type),
("smalltable", PyrexTypes.CArrayType(PyrexTypes.c_py_ssize_t_type, 2)),
("internal", PyrexTypes.c_void_ptr_type),
]),
('Py_complex', 'Py_complex',
[('real', PyrexTypes.c_double_type),
('imag', PyrexTypes.c_double_type),
])
]
# set up builtin scope
builtin_scope = BuiltinScope()
def init_builtin_funcs():
for bf in builtin_function_table:
bf.declare_in_scope(builtin_scope)
builtin_types = {}
def init_builtin_types():
global builtin_types
for name, cname, methods in builtin_types_table:
utility = builtin_utility_code.get(name)
if name == 'frozenset':
objstruct_cname = 'PySetObject'
elif name == 'bytearray':
objstruct_cname = 'PyByteArrayObject'
elif name == 'bool':
objstruct_cname = None
elif name == 'Exception':
objstruct_cname = "PyBaseExceptionObject"
elif name == 'StopAsyncIteration':
objstruct_cname = "PyBaseExceptionObject"
else:
objstruct_cname = 'Py%sObject' % name.capitalize()
type_class = PyrexTypes.BuiltinObjectType
if name in ['dict', 'list', 'set', 'frozenset']:
type_class = PyrexTypes.BuiltinTypeConstructorObjectType
elif name == 'tuple':
type_class = PyrexTypes.PythonTupleTypeConstructor
the_type = builtin_scope.declare_builtin_type(name, cname, utility, objstruct_cname,
type_class=type_class)
builtin_types[name] = the_type
for method in methods:
method.declare_in_type(the_type)
def init_builtin_structs():
for name, cname, attribute_types in builtin_structs_table:
scope = StructOrUnionScope(name)
for attribute_name, attribute_type in attribute_types:
scope.declare_var(attribute_name, attribute_type, None,
attribute_name, allow_pyobject=True)
builtin_scope.declare_struct_or_union(
name, "struct", scope, 1, None, cname = cname)
def init_builtins():
#Errors.init_thread() # hopefully not needed - we should not emit warnings ourselves
init_builtin_structs()
init_builtin_types()
init_builtin_funcs()
entry = builtin_scope.declare_var(
'__debug__', PyrexTypes.c_const_type(PyrexTypes.c_bint_type),
pos=None, cname='__pyx_assertions_enabled()', is_cdef=True)
entry.utility_code = UtilityCode.load_cached("AssertionsEnabled", "Exceptions.c")
global type_type, list_type, tuple_type, dict_type, set_type, frozenset_type, slice_type
global bytes_type, str_type, unicode_type, basestring_type, bytearray_type
global float_type, int_type, long_type, bool_type, complex_type
global memoryview_type, py_buffer_type
global sequence_types
type_type = builtin_scope.lookup('type').type
list_type = builtin_scope.lookup('list').type
tuple_type = builtin_scope.lookup('tuple').type
dict_type = builtin_scope.lookup('dict').type
set_type = builtin_scope.lookup('set').type
frozenset_type = builtin_scope.lookup('frozenset').type
slice_type = builtin_scope.lookup('slice').type
bytes_type = builtin_scope.lookup('bytes').type
str_type = builtin_scope.lookup('str').type
unicode_type = builtin_scope.lookup('unicode').type
basestring_type = builtin_scope.lookup('basestring').type
bytearray_type = builtin_scope.lookup('bytearray').type
memoryview_type = builtin_scope.lookup('memoryview').type
float_type = builtin_scope.lookup('float').type
int_type = builtin_scope.lookup('int').type
long_type = builtin_scope.lookup('long').type
bool_type = builtin_scope.lookup('bool').type
complex_type = builtin_scope.lookup('complex').type
sequence_types = (
list_type,
tuple_type,
bytes_type,
str_type,
unicode_type,
basestring_type,
bytearray_type,
memoryview_type,
)
# Set up type inference links between equivalent Python/C types
bool_type.equivalent_type = PyrexTypes.c_bint_type
PyrexTypes.c_bint_type.equivalent_type = bool_type
float_type.equivalent_type = PyrexTypes.c_double_type
PyrexTypes.c_double_type.equivalent_type = float_type
complex_type.equivalent_type = PyrexTypes.c_double_complex_type
PyrexTypes.c_double_complex_type.equivalent_type = complex_type
py_buffer_type = builtin_scope.lookup('Py_buffer').type
init_builtins()
##############################
# Support for a few standard library modules that Cython understands (currently typing and dataclasses)
##############################
_known_module_scopes = {}
def get_known_standard_library_module_scope(module_name):
mod = _known_module_scopes.get(module_name)
if mod:
return mod
if module_name == "typing":
mod = ModuleScope(module_name, None, None)
for name, tp in [
('Dict', dict_type),
('List', list_type),
('Tuple', tuple_type),
('Set', set_type),
('FrozenSet', frozenset_type),
]:
name = EncodedString(name)
entry = mod.declare_type(name, tp, pos = None)
var_entry = Entry(name, None, PyrexTypes.py_object_type)
var_entry.is_pyglobal = True
var_entry.is_variable = True
var_entry.scope = mod
entry.as_variable = var_entry
entry.known_standard_library_import = "%s.%s" % (module_name, name)
for name in ['ClassVar', 'Optional']:
name = EncodedString(name)
indexed_type = PyrexTypes.SpecialPythonTypeConstructor(EncodedString("typing."+name))
entry = mod.declare_type(name, indexed_type, pos = None)
var_entry = Entry(name, None, PyrexTypes.py_object_type)
var_entry.is_pyglobal = True
var_entry.is_variable = True
var_entry.scope = mod
entry.as_variable = var_entry
entry.known_standard_library_import = "%s.%s" % (module_name, name)
_known_module_scopes[module_name] = mod
elif module_name == "dataclasses":
mod = ModuleScope(module_name, None, None)
indexed_type = PyrexTypes.SpecialPythonTypeConstructor(EncodedString("dataclasses.InitVar"))
initvar_string = EncodedString("InitVar")
entry = mod.declare_type(initvar_string, indexed_type, pos = None)
var_entry = Entry(initvar_string, None, PyrexTypes.py_object_type)
var_entry.is_pyglobal = True
var_entry.scope = mod
entry.as_variable = var_entry
entry.known_standard_library_import = "%s.InitVar" % module_name
for name in ["dataclass", "field"]:
mod.declare_var(EncodedString(name), PyrexTypes.py_object_type, pos=None)
_known_module_scopes[module_name] = mod
elif module_name == "functools":
mod = ModuleScope(module_name, None, None)
for name in ["total_ordering"]:
mod.declare_var(EncodedString(name), PyrexTypes.py_object_type, pos=None)
_known_module_scopes[module_name] = mod
return mod
def get_known_standard_library_entry(qualified_name):
name_parts = qualified_name.split(".")
module_name = EncodedString(name_parts[0])
rest = name_parts[1:]
if len(rest) > 1: # for now, we don't know how to deal with any nested modules
return None
mod = get_known_standard_library_module_scope(module_name)
# eventually handle more sophisticated multiple lookups if needed
if mod and rest:
return mod.lookup_here(rest[0])
return None
def exprnode_to_known_standard_library_name(node, env):
qualified_name_parts = []
known_name = None
while node.is_attribute:
qualified_name_parts.append(node.attribute)
node = node.obj
if node.is_name:
entry = env.lookup(node.name)
if entry and entry.known_standard_library_import:
if get_known_standard_library_entry(
entry.known_standard_library_import):
known_name = entry.known_standard_library_import
else:
standard_env = get_known_standard_library_module_scope(
entry.known_standard_library_import)
if standard_env:
qualified_name_parts.append(standard_env.name)
known_name = ".".join(reversed(qualified_name_parts))
return known_name
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