| durin42 |
| hg-reviewers |
The symbol from this module is only used in functions. Let's access
that symbol through its imported module so importing
zope.interface.advice can be lazy.
| Lint Skipped |
| Unit Tests Skipped |
| __docformat__ = 'restructuredtext' | __docformat__ = 'restructuredtext' | ||||
| import sys | import sys | ||||
| from types import FunctionType | from types import FunctionType | ||||
| from types import MethodType | from types import MethodType | ||||
| from types import ModuleType | from types import ModuleType | ||||
| import weakref | import weakref | ||||
| from .advice import addClassAdvisor | from . import advice as advicemod | ||||
| from .interface import InterfaceClass | from .interface import InterfaceClass | ||||
| from .interface import SpecificationBase | from .interface import SpecificationBase | ||||
| from .interface import Specification | from .interface import Specification | ||||
| from ._compat import CLASS_TYPES as DescriptorAwareMetaClasses | from ._compat import CLASS_TYPES as DescriptorAwareMetaClasses | ||||
| from ._compat import PYTHON3 | from ._compat import PYTHON3 | ||||
| # Registry of class-implementation specifications | # Registry of class-implementation specifications | ||||
| BuiltinImplementationSpecifications = {} | BuiltinImplementationSpecifications = {} | ||||
| # until later on. | # until later on. | ||||
| if locals is frame.f_globals or '__module__' not in locals: | if locals is frame.f_globals or '__module__' not in locals: | ||||
| raise TypeError(name+" can be used only from a class definition.") | raise TypeError(name+" can be used only from a class definition.") | ||||
| if '__implements_advice_data__' in locals: | if '__implements_advice_data__' in locals: | ||||
| raise TypeError(name+" can be used only once in a class definition.") | raise TypeError(name+" can be used only once in a class definition.") | ||||
| locals['__implements_advice_data__'] = interfaces, classImplements | locals['__implements_advice_data__'] = interfaces, classImplements | ||||
| addClassAdvisor(_implements_advice, depth=3) | advicemod.addClassAdvisor(_implements_advice, depth=3) | ||||
| def implements(*interfaces): | def implements(*interfaces): | ||||
| """Declare interfaces implemented by instances of a class | """Declare interfaces implemented by instances of a class | ||||
| This function is called in a class definition. | This function is called in a class definition. | ||||
| The arguments are one or more interfaces or interface | The arguments are one or more interfaces or interface | ||||
| specifications (IDeclaration objects). | specifications (IDeclaration objects). | ||||
| "class definition.") | "class definition.") | ||||
| if '__provides__' in locals: | if '__provides__' in locals: | ||||
| raise TypeError( | raise TypeError( | ||||
| "classProvides can only be used once in a class definition.") | "classProvides can only be used once in a class definition.") | ||||
| locals["__provides__"] = _normalizeargs(interfaces) | locals["__provides__"] = _normalizeargs(interfaces) | ||||
| addClassAdvisor(_classProvides_advice, depth=2) | advicemod.addClassAdvisor(_classProvides_advice, depth=2) | ||||
| def _classProvides_advice(cls): | def _classProvides_advice(cls): | ||||
| # This entire approach is invalid under Py3K. Don't even try to fix | # This entire approach is invalid under Py3K. Don't even try to fix | ||||
| # the coverage for this block there. :( | # the coverage for this block there. :( | ||||
| interfaces = cls.__dict__['__provides__'] | interfaces = cls.__dict__['__provides__'] | ||||
| del cls.__provides__ | del cls.__provides__ | ||||
| directlyProvides(cls, *interfaces) | directlyProvides(cls, *interfaces) | ||||
| return cls | return cls | ||||