def register(cls, func=None):
"""generic_func.register(cls, func) -> func
Registers a new implementation for the given *cls* on a *generic_func*.
"""
if func is None:
return lambda f: register(cls, f)
registry[cls] = func
if ns.cache_token is None and hasattr(cls, '__abstractmethods__'):
ns.cache_token = get_cache_token()
dispatch_cache.clear()
return func
def register(cls, func=None):
"""generic_func.register(cls, func) -> func
Registers a new implementation for the given *cls* on a *generic_func*.
"""
if func is None:
return lambda f: register(cls, f)
registry[cls] = func
if ns.cache_token is None and hasattr(cls, '__abstractmethods__'):
ns.cache_token = get_cache_token()
dispatch_cache.clear()
return func
def dispatch(cls):
"""generic_func.dispatch(cls) -> <function implementation>
Runs the dispatch algorithm to return the best available implementation
for the given *cls* registered on *generic_func*.
"""
if ns.cache_token is not None:
current_token = get_cache_token()
if ns.cache_token != current_token:
dispatch_cache.clear()
ns.cache_token = current_token
try:
impl = dispatch_cache[cls]
except KeyError:
try:
impl = registry[cls]
except KeyError:
impl = _find_impl(cls, registry)
dispatch_cache[cls] = impl
return impl
def dispatch(cls):
"""generic_func.dispatch(cls) -> <function implementation>
Runs the dispatch algorithm to return the best available implementation
for the given *cls* registered on *generic_func*.
"""
if ns.cache_token is not None:
current_token = get_cache_token()
if ns.cache_token != current_token:
dispatch_cache.clear()
ns.cache_token = current_token
try:
impl = dispatch_cache[cls]
except KeyError:
try:
impl = registry[cls]
except KeyError:
impl = _find_impl(cls, registry)
dispatch_cache[cls] = impl
return impl
