def _dynamic_class_hook(ctx: DynamicClassDefContext) -> None:
"""Generate a declarative Base class when the declarative_base() function
is encountered."""
_add_globals(ctx)
cls = ClassDef(ctx.name, Block([]))
cls.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), cls, ctx.api.cur_mod_id)
cls.info = info
_set_declarative_metaclass(ctx.api, cls)
cls_arg = util.get_callexpr_kwarg(ctx.call, "cls", expr_types=(NameExpr, ))
if cls_arg is not None and isinstance(cls_arg.node, TypeInfo):
util.set_is_base(cls_arg.node)
decl_class.scan_declarative_assignments_and_apply_types(
cls_arg.node.defn, ctx.api, is_mixin_scan=True)
info.bases = [Instance(cls_arg.node, [])]
else:
obj = ctx.api.named_type(names.NAMED_TYPE_BUILTINS_OBJECT)
info.bases = [obj]
try:
calculate_mro(info)
except MroError:
util.fail(ctx.api, "Not able to calculate MRO for declarative base",
ctx.call)
obj = ctx.api.named_type(names.NAMED_TYPE_BUILTINS_OBJECT)
info.bases = [obj]
info.fallback_to_any = True
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
util.set_is_base(info)
def add_new_class_for_module(module: MypyFile, name: str,
bases: List[Instance],
fields: 'OrderedDict[str, MypyType]') -> TypeInfo:
new_class_unique_name = checker.gen_unique_name(name, module.names)
# make new class expression
classdef = ClassDef(new_class_unique_name, Block([]))
classdef.fullname = module.fullname() + '.' + new_class_unique_name
# make new TypeInfo
new_typeinfo = TypeInfo(SymbolTable(), classdef, module.fullname())
new_typeinfo.bases = bases
calculate_mro(new_typeinfo)
new_typeinfo.calculate_metaclass_type()
def add_field_to_new_typeinfo(var: Var,
is_initialized_in_class: bool = False,
is_property: bool = False) -> None:
var.info = new_typeinfo
var.is_initialized_in_class = is_initialized_in_class
var.is_property = is_property
var._fullname = new_typeinfo.fullname() + '.' + var.name()
new_typeinfo.names[var.name()] = SymbolTableNode(MDEF, var)
# add fields
var_items = [Var(item, typ) for item, typ in fields.items()]
for var_item in var_items:
add_field_to_new_typeinfo(var_item, is_property=True)
classdef.info = new_typeinfo
module.names[new_class_unique_name] = SymbolTableNode(
GDEF, new_typeinfo, plugin_generated=True)
return new_typeinfo
def make_type_info(name: str,
is_abstract: bool = False,
mro: List[TypeInfo] = None,
bases: List[Instance] = None,
typevars: List[str] = None) -> TypeInfo:
"""Make a TypeInfo suitable for use in unit tests."""
class_def = ClassDef(name, Block([]), None, [])
class_def.fullname = name
if typevars:
v = [] # type: List[TypeVarDef]
id = 1
for n in typevars:
v.append(TypeVarDef(n, id, None))
id += 1
class_def.type_vars = v
info = TypeInfo(SymbolTable(), class_def)
if mro is None:
mro = []
info.mro = [info] + mro
if bases is None:
if mro:
# By default, assume that there is a single non-generic base.
bases = [Instance(mro[0], [])]
else:
bases = []
info.bases = bases
return info
def _combine_protocols(p1: Instance, p2: Instance) -> Instance:
def base_repr(base):
if 'pfun.Intersection' in base.type.fullname:
return ', '.join([repr(b) for b in base.type.bases])
return repr(base)
def get_bases(base):
if 'pfun.Intersection' in base.type.fullname:
bases = set()
for b in base.type.bases:
bases |= get_bases(b)
return bases
return set([base])
names = p1.type.names.copy()
names.update(p2.type.names)
keywords = p1.type.defn.keywords.copy()
keywords.update(p2.type.defn.keywords)
bases = get_bases(p1) | get_bases(p2)
bases_repr = ', '.join(sorted([repr(base) for base in bases]))
name = f'Intersection[{bases_repr}]'
defn = ClassDef(name, Block([]),
p1.type.defn.type_vars + p2.type.defn.type_vars,
[NameExpr(p1.type.fullname),
NameExpr(p2.type.fullname)], None, list(keywords.items()))
defn.fullname = f'pfun.{name}'
info = TypeInfo(names, defn, '')
info.is_protocol = True
info.is_abstract = True
info.bases = [p1, p2]
info.abstract_attributes = (p1.type.abstract_attributes +
p2.type.abstract_attributes)
calculate_mro(info)
return Instance(info, p1.args + p2.args)
def _dynamic_class_hook(ctx: DynamicClassDefContext) -> None:
"""Generate a declarative Base class when the declarative_base() function
is encountered."""
cls = ClassDef(ctx.name, Block([]))
cls.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), cls, ctx.api.cur_mod_id)
cls.info = info
_make_declarative_meta(ctx.api, cls)
cls_arg = util._get_callexpr_kwarg(ctx.call, "cls")
if cls_arg is not None:
decl_class._scan_declarative_assignments_and_apply_types(
cls_arg.node.defn, ctx.api, is_mixin_scan=True)
info.bases = [Instance(cls_arg.node, [])]
else:
obj = ctx.api.builtin_type("builtins.object")
info.bases = [obj]
try:
calculate_mro(info)
except MroError:
util.fail(ctx.api, "Not able to calculate MRO for declarative base",
ctx.call)
obj = ctx.api.builtin_type("builtins.object")
info.bases = [obj]
info.fallback_to_any = True
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
def build_class_with_annotated_fields(api: 'TypeChecker', base: Type, fields: 'OrderedDict[str, Type]',
name: str) -> Instance:
"""Build an Instance with `name` that contains the specified `fields` as attributes and extends `base`."""
# Credit: This code is largely copied/modified from TypeChecker.intersect_instance_callable and
# NamedTupleAnalyzer.build_namedtuple_typeinfo
from mypy.checker import gen_unique_name
cur_module = cast(MypyFile, api.scope.stack[0])
gen_name = gen_unique_name(name, cur_module.names)
cdef = ClassDef(name, Block([]))
cdef.fullname = cur_module.fullname() + '.' + gen_name
info = TypeInfo(SymbolTable(), cdef, cur_module.fullname())
cdef.info = info
info.bases = [base]
def add_field(var: Var, is_initialized_in_class: bool = False,
is_property: bool = False) -> None:
var.info = info
var.is_initialized_in_class = is_initialized_in_class
var.is_property = is_property
var._fullname = '%s.%s' % (info.fullname(), var.name())
info.names[var.name()] = SymbolTableNode(MDEF, var)
vars = [Var(item, typ) for item, typ in fields.items()]
for var in vars:
add_field(var, is_property=True)
calculate_mro(info)
info.calculate_metaclass_type()
cur_module.names[gen_name] = SymbolTableNode(GDEF, info, plugin_generated=True)
return Instance(info, [])
def make_type_info(name: str,
is_abstract: bool = False,
mro: List[TypeInfo] = None,
bases: List[Instance] = None,
typevars: List[str] = None) -> TypeInfo:
"""Make a TypeInfo suitable for use in unit tests."""
class_def = ClassDef(name, Block([]), None, [])
class_def.fullname = name
if typevars:
v = [] # type: List[TypeVarDef]
id = 1
for n in typevars:
v.append(TypeVarDef(n, id, None))
id += 1
class_def.type_vars = v
info = TypeInfo(SymbolTable(), class_def)
if mro is None:
mro = []
info.mro = [info] + mro
if bases is None:
if mro:
# By default, assume that there is a single non-generic base.
bases = [Instance(mro[0], [])]
else:
bases = []
info.bases = bases
return info
def dyn_class_hook(self, ctx: DynamicClassDefContext) -> TypedDictType:
"""Generate annotations from a JSON Schema."""
schema_path = ctx.call.args[0]
if len(ctx.call.args) > 1:
schema_ref = ctx.call.args[1].value
else:
schema_ref = '#/'
try:
schema = self.resolve_name(schema_path.value)
except (ImportError, AttributeError):
schema_path = os.path.abspath(schema_path.value)
schema = self._load_schema(schema_path)
make_type = TypeMaker(schema_path, schema)
td_type = make_type(ctx, schema_ref)
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
if isinstance(td_type, TypedDictType):
info.typeddict_type = td_type
base_type = named_builtin_type(ctx, 'dict')
else:
base_type = td_type
mro = base_type.type.mro
if not mro:
mro = [base_type.type, named_builtin_type(ctx, 'object').type]
class_def.info = info
info.mro = mro
info.bases = [base_type]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
def query_callback(ctx: DynamicClassDefContext) -> TypeInfo:
# todo be defensive--ctx.type is Schema[Literal[fname]]
#fname = ctx.arg_types[0].value
query = ctx.call.args[1].value
defn = ClassDef(
ctx.name,
defs=Block([
mpn.AssignmentStmt(
lvalues=mpn.NameExpr,
rvalue=None,
type=ctx.api.lookup_fully_qualified_or_none('builtins.str'),
new_syntax=True)
]))
defn.fullname = ctx.api.qualified_name(ctx.name)
names = SymbolTable()
var = Var('me', ctx.api.builtin_type('builtins.str'))
var.info = var.type.type
var.is_property = True
names['me'] = SymbolTableNode(MDEF, var, plugin_generated=True)
info = TypeInfo(names=names, defn=defn, module_name=ctx.api.cur_mod_id)
obj = ctx.api.builtin_type('builtins.object')
info.mro = [info, obj.type]
info.bases = [obj]
print(ctx.name, info)
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
def add_new_class_for_module(
module: MypyFile,
name: str,
bases: List[Instance],
fields: Optional[Dict[str, MypyType]] = None,
no_serialize: bool = False,
) -> TypeInfo:
new_class_unique_name = checker.gen_unique_name(name, module.names)
# make new class expression
classdef = ClassDef(new_class_unique_name, Block([]))
classdef.fullname = module.fullname + "." + new_class_unique_name
# make new TypeInfo
new_typeinfo = TypeInfo(SymbolTable(), classdef, module.fullname)
new_typeinfo.bases = bases
calculate_mro(new_typeinfo)
new_typeinfo.calculate_metaclass_type()
# add fields
if fields:
for field_name, field_type in fields.items():
var = Var(field_name, type=field_type)
var.info = new_typeinfo
var._fullname = new_typeinfo.fullname + "." + field_name
new_typeinfo.names[field_name] = SymbolTableNode(
MDEF, var, plugin_generated=True, no_serialize=no_serialize)
classdef.info = new_typeinfo
module.names[new_class_unique_name] = SymbolTableNode(
GDEF, new_typeinfo, plugin_generated=True, no_serialize=no_serialize)
return new_typeinfo
def stale_info() -> TypeInfo:
suggestion = "<stale cache: consider running mypy without --quick>"
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<stale>")
info.mro = [info]
info.bases = []
return info
def _create_intersection(args, context, api):
defn = ClassDef('Intersection', Block([]))
defn.fullname = 'pfun.Intersection'
info = TypeInfo({}, defn, 'pfun')
info.is_protocol = True
calculate_mro(info)
i = Instance(info, args, line=context.line, column=context.column)
intersection_translator = TranslateIntersection(api, i)
return i.accept(intersection_translator)
def visit_class_def(self, node: ClassDef) -> ClassDef:
new = ClassDef(node.name, self.block(node.defs), node.type_vars,
self.expressions(node.base_type_exprs), node.metaclass)
new.fullname = node.fullname
new.info = node.info
new.decorators = [
self.expr(decorator) for decorator in node.decorators
]
return new
def stale_info() -> TypeInfo:
suggestion = "<stale cache: consider running mypy without --quick>"
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<stale>")
info.mro = [info]
info.bases = []
return info
def missing_info(modules: Dict[str, MypyFile]) -> TypeInfo:
suggestion = _SUGGESTION.format('info')
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<missing>")
obj_type = lookup_fully_qualified_typeinfo(modules, 'builtins.object', allow_missing=False)
info.bases = [Instance(obj_type, [])]
info.mro = [info, obj_type]
return info
def visit_class_def(self, node: ClassDef) -> Node:
new = ClassDef(node.name, self.block(node.defs), node.type_vars,
self.nodes(node.base_type_exprs), node.metaclass)
new.fullname = node.fullname
new.info = node.info
new.decorators = [
decorator.accept(self) for decorator in node.decorators
]
new.is_builtinclass = node.is_builtinclass
return new
def visit_class_def(self, node: ClassDef) -> Node:
new = ClassDef(node.name, self.block(node.defs), node.type_vars,
self.types(node.base_types), node.metaclass)
new.fullname = node.fullname
new.info = node.info
new.decorators = [
decorator.accept(self) for decorator in node.decorators
]
new.is_builtinclass = node.is_builtinclass
return new
def missing_info(modules: Dict[str, MypyFile]) -> TypeInfo:
suggestion = "<missing info: *should* have gone away during fine-grained update>"
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<missing>")
obj_type = lookup_qualified(modules, 'builtins.object', False)
assert isinstance(obj_type, TypeInfo)
info.bases = [Instance(obj_type, [])]
info.mro = [info, obj_type]
return info
def add_info_hook(ctx):
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
obj = ctx.api.builtin_type('builtins.object')
info.mro = [info, obj.type]
info.bases = [obj]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
DECL_BASES.add(class_def.fullname)
def missing_info(modules: Dict[str, MypyFile]) -> TypeInfo:
suggestion = "<missing info: *should* have gone away during fine-grained update>"
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<missing>")
obj_type = lookup_qualified(modules, 'builtins.object', False)
assert isinstance(obj_type, TypeInfo)
info.bases = [Instance(obj_type, [])]
info.mro = [info, obj_type]
return info
def add_info_hook(ctx) -> None:
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
obj = ctx.api.builtin_type('builtins.object')
info.mro = [info, obj.type]
info.bases = [obj]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
info.metadata['magic'] = True
def add_info_hook(ctx) -> None:
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
obj = ctx.api.named_type('builtins.object')
info.mro = [info, obj.type]
info.bases = [obj]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
info.metadata['magic'] = True
def visit_class_def(self, node: ClassDef) -> ClassDef:
new = ClassDef(node.name,
self.block(node.defs),
node.type_vars,
self.expressions(node.base_type_exprs),
node.metaclass)
new.fullname = node.fullname
new.info = node.info
new.decorators = [self.expr(decorator)
for decorator in node.decorators]
return new
def stale_info(modules: Dict[str, MypyFile]) -> TypeInfo:
suggestion = "<stale cache: consider running mypy without --quick>"
dummy_def = ClassDef(suggestion, Block([]))
dummy_def.fullname = suggestion
info = TypeInfo(SymbolTable(), dummy_def, "<stale>")
obj_type = lookup_qualified(modules, 'builtins.object', False)
assert isinstance(obj_type, TypeInfo)
info.bases = [Instance(obj_type, [])]
info.mro = [info, obj_type]
return info
def add_info_hook(ctx: DynamicClassDefContext):
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
queryset_type_fullname = ctx.call.args[0].fullname
queryset_info = ctx.api.lookup_fully_qualified_or_none(queryset_type_fullname).node # type: TypeInfo
obj = ctx.api.named_type('builtins.object')
info.mro = [info, queryset_info, obj.type]
info.bases = [Instance(queryset_info, [])]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
def visit_class_def(self, cdef: ClassDef) -> None:
kind = self.kind_by_scope()
if kind == LDEF:
return
elif kind == GDEF:
self.sem.check_no_global(cdef.name, cdef)
cdef.fullname = self.sem.qualified_name(cdef.name)
info = TypeInfo(SymbolTable(), cdef, self.sem.cur_mod_id)
info.set_line(cdef.line, cdef.column)
cdef.info = info
if kind == GDEF:
self.sem.globals[cdef.name] = SymbolTableNode(kind, info)
self.process_nested_classes(cdef)
def visit_class_def(self, cdef: ClassDef) -> None:
kind = self.kind_by_scope()
if kind == LDEF:
return
elif kind == GDEF:
self.sem.check_no_global(cdef.name, cdef)
cdef.fullname = self.sem.qualified_name(cdef.name)
info = TypeInfo(SymbolTable(), cdef, self.sem.cur_mod_id)
info.set_line(cdef.line, cdef.column)
cdef.info = info
if kind == GDEF:
self.sem.globals[cdef.name] = SymbolTableNode(kind, info)
self.process_nested_classes(cdef)
def visit_class_def(self, node: ClassDef) -> Node:
new = ClassDef(node.name, self.block(node.defs), node.type_vars,
self.nodes(node.base_type_exprs), node.metaclass)
new.fullname = node.fullname
new.info = node.info
new.base_types = []
for base in node.base_types:
new.base_types.append(cast(Instance, self.type(base)))
new.decorators = [
decorator.accept(self) for decorator in node.decorators
]
new.is_builtinclass = node.is_builtinclass
return new
def make_fake_register_class_instance(api: CheckerPluginInterface, type_args: Sequence[Type]
) -> Instance:
defn = ClassDef(REGISTER_RETURN_CLASS, Block([]))
defn.fullname = f'functools.{REGISTER_RETURN_CLASS}'
info = TypeInfo(SymbolTable(), defn, "functools")
obj_type = api.named_generic_type('builtins.object', []).type
info.bases = [Instance(obj_type, [])]
info.mro = [info, obj_type]
defn.info = info
func_arg = Argument(Var('name'), AnyType(TypeOfAny.implementation_artifact), None, ARG_POS)
add_method_to_class(api, defn, '__call__', [func_arg], NoneType())
return Instance(info, type_args)
def decl_info_hook(ctx: DynamicClassDefContext) -> None:
"""Support dynamically defining declarative bases.
For example:
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
"""
cls_bases = [] # type: List[Instance]
# Passing base classes as positional arguments is currently not handled.
if 'cls' in ctx.call.arg_names:
declarative_base_cls_arg = ctx.call.args[ctx.call.arg_names.index(
"cls")]
if isinstance(declarative_base_cls_arg, TupleExpr):
items = [item for item in declarative_base_cls_arg.items]
else:
items = [declarative_base_cls_arg]
for item in items:
if isinstance(item, RefExpr) and isinstance(item.node, TypeInfo):
base = fill_typevars_with_any(item.node)
# TODO: Support tuple types?
if isinstance(base, Instance):
cls_bases.append(base)
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
obj = ctx.api.builtin_type('builtins.object')
info.bases = cls_bases or [obj]
try:
calculate_mro(info)
except MroError:
ctx.api.fail("Not able to calculate MRO for declarative base",
ctx.call)
info.bases = [obj]
info.fallback_to_any = True
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
set_declarative(info)
# TODO: check what else is added.
add_metadata_var(ctx.api, info)
def make_type_info(self,
name: str,
module_name: Optional[str] = None,
is_abstract: bool = False,
mro: Optional[List[TypeInfo]] = None,
bases: Optional[List[Instance]] = None,
typevars: Optional[List[str]] = None,
variances: Optional[List[int]] = None) -> TypeInfo:
"""Make a TypeInfo suitable for use in unit tests."""
class_def = ClassDef(name, Block([]), None, [])
class_def.fullname = name
if module_name is None:
if '.' in name:
module_name = name.rsplit('.', 1)[0]
else:
module_name = '__main__'
if typevars:
v: List[TypeVarLikeType] = []
for id, n in enumerate(typevars, 1):
if variances:
variance = variances[id - 1]
else:
variance = COVARIANT
v.append(TypeVarType(n, n, id, [], self.o, variance=variance))
class_def.type_vars = v
info = TypeInfo(SymbolTable(), class_def, module_name)
if mro is None:
mro = []
if name != 'builtins.object':
mro.append(self.oi)
info.mro = [info] + mro
if bases is None:
if mro:
# By default, assume that there is a single non-generic base.
bases = [Instance(mro[0], [])]
else:
bases = []
info.bases = bases
return info
def make_type_info(self, name: str,
module_name: Optional[str] = None,
is_abstract: bool = False,
mro: Optional[List[TypeInfo]] = None,
bases: Optional[List[Instance]] = None,
typevars: Optional[List[str]] = None,
variances: Optional[List[int]] = None) -> TypeInfo:
"""Make a TypeInfo suitable for use in unit tests."""
class_def = ClassDef(name, Block([]), None, [])
class_def.fullname = name
if module_name is None:
if '.' in name:
module_name = name.rsplit('.', 1)[0]
else:
module_name = '__main__'
if typevars:
v = [] # type: List[TypeVarDef]
for id, n in enumerate(typevars, 1):
if variances:
variance = variances[id - 1]
else:
variance = COVARIANT
v.append(TypeVarDef(n, n, id, [], self.o, variance=variance))
class_def.type_vars = v
info = TypeInfo(SymbolTable(), class_def, module_name)
if mro is None:
mro = []
if name != 'builtins.object':
mro.append(self.oi)
info.mro = [info] + mro
if bases is None:
if mro:
# By default, assume that there is a single non-generic base.
bases = [Instance(mro[0], [])]
else:
bases = []
info.bases = bases
return info
def _dynamic_class_hook(ctx: DynamicClassDefContext) -> None:
"""Generate a declarative Base class when the declarative_base() function
is encountered."""
cls = ClassDef(ctx.name, Block([]))
cls.fullname = ctx.api.qualified_name(ctx.name)
declarative_meta_sym: SymbolTableNode = ctx.api.modules[
"sqlalchemy.orm.decl_api"].names["DeclarativeMeta"]
declarative_meta_typeinfo: TypeInfo = declarative_meta_sym.node
declarative_meta_name: NameExpr = NameExpr("DeclarativeMeta")
declarative_meta_name.kind = GDEF
declarative_meta_name.fullname = "sqlalchemy.orm.decl_api.DeclarativeMeta"
declarative_meta_name.node = declarative_meta_typeinfo
cls.metaclass = declarative_meta_name
declarative_meta_instance = Instance(declarative_meta_typeinfo, [])
info = TypeInfo(SymbolTable(), cls, ctx.api.cur_mod_id)
info.declared_metaclass = info.metaclass_type = declarative_meta_instance
cls.info = info
cls_arg = util._get_callexpr_kwarg(ctx.call, "cls")
if cls_arg is not None:
decl_class._scan_declarative_assignments_and_apply_types(
cls_arg.node.defn, ctx.api, is_mixin_scan=True)
info.bases = [Instance(cls_arg.node, [])]
else:
obj = ctx.api.builtin_type("builtins.object")
info.bases = [obj]
try:
calculate_mro(info)
except MroError:
util.fail(ctx.api, "Not able to calculate MRO for declarative base",
ctx.call)
info.bases = [obj]
info.fallback_to_any = True
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
def _basic_new_typeinfo(self, ctx: AnalyzeTypeContext, name: str,
basetype_or_fallback: Instance) -> TypeInfo:
"""
Build a basic :class:`.TypeInfo`.
This was basically lifted from ``mypy.semanal``.
"""
class_def = ClassDef(name, Block([]))
class_def.fullname = name
info = TypeInfo(SymbolTable(), class_def, '')
class_def.info = info
mro = basetype_or_fallback.type.mro
if not mro:
mro = [basetype_or_fallback.type,
named_builtin_type(ctx, 'object').type]
info.mro = [info] + mro
info.bases = [basetype_or_fallback]
return info
def create_dynamic_class(
ctx: DynamicClassDefContext,
bases: List[Instance],
*,
name: Optional[str] = None,
metaclass: Optional[str] = None,
symbol_table: Optional[SymbolTable] = None,
) -> TypeInfo:
if name is None:
name = ctx.name
class_def = ClassDef(name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
if metaclass is not None:
metaclass_type_info = lookup_type_info(ctx.api, metaclass)
if metaclass_type_info is not None:
info.declared_metaclass = Instance(metaclass_type_info, [])
class_def.info = info
obj = ctx.api.builtin_type("builtins.object")
info.bases = bases or [obj]
try:
calculate_mro(info)
except MroError:
ctx.api.fail("Not able to calculate MRO for dynamic class", ctx.call)
info.bases = [obj]
info.fallback_to_any = True
if symbol_table is None:
ctx.api.add_symbol_table_node(name, SymbolTableNode(GDEF, info))
else:
symbol_table[name] = SymbolTableNode(GDEF, info)
add_metadata_var(ctx.api, info)
add_query_cls_var(ctx.api, info)
return info
def create_ortho_diff_class(base1: TypeInfo, base2: TypeInfo,
api: SemanticAnalyzerPluginInterface,
call_ctx: Context) -> Tuple[str, SymbolTableNode]:
# https://github.com/dropbox/sqlalchemy-stubs/blob/55470ceab8149db983411d5c094c9fe16343c58b/sqlmypy.py#L173-L216
cls_name = get_ortho_diff_name(base1.defn, base2.defn)
class_def = ClassDef(cls_name, Block([]))
class_def.fullname = api.qualified_name(cls_name)
info = TypeInfo(SymbolTable(), class_def, api.cur_mod_id)
class_def.info = info
obj = api.builtin_type('builtins.object')
info.bases = [cast(Instance, fill_typevars(b)) for b in (base1, base2)]
try:
calculate_mro(info)
except MroError:
api.fail('Unable to calculate MRO for dynamic class', call_ctx)
info.bases = [obj]
info.fallback_to_any = True
return cls_name, SymbolTableNode(GDEF, info)
def decl_info_hook(ctx):
"""Support dynamically defining declarative bases.
For example:
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
"""
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
class_def.info = info
obj = ctx.api.builtin_type('builtins.object')
info.mro = [info, obj.type]
info.bases = [obj]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
set_declarative(info)
# TODO: check what else is added.
add_metadata_var(ctx, info)
def dyn_class_hook(self, ctx: DynamicClassDefContext) -> TypedDictType:
"""Generate annotations from a JSON Schema."""
schema_path, = ctx.call.args
schema_path = os.path.abspath(schema_path.value)
schema = self._load_schema(schema_path)
make_type = TypeMaker(schema_path, schema)
td_type = make_type(ctx)
class_def = ClassDef(ctx.name, Block([]))
class_def.fullname = ctx.api.qualified_name(ctx.name)
info = TypeInfo(SymbolTable(), class_def, ctx.api.cur_mod_id)
info.typeddict_type = td_type
dict_type = named_builtin_type(ctx, 'dict')
mro = dict_type.type.mro
if not mro:
mro = [dict_type.type, named_builtin_type(ctx, 'object').type]
class_def.info = info
info.mro = mro
info.bases = [dict_type]
ctx.api.add_symbol_table_node(ctx.name, SymbolTableNode(GDEF, info))
