def Global(name, default=None):
'''
Global (per-thread) binding from operator name to implementation, by
namespace.
'''
# Delay creation to handle circular dependencies.
assert name
namespace_map = singleton(NamespaceMap)
return namespace_map.get(name, default)
def Global(name, default=None):
'''
Global (per-thread) binding from operator name to implementation, by
namespace.
'''
# Delay creation to handle circular dependencies.
assert name
namespace_map = singleton(NamespaceMap)
return namespace_map.get(name, default)
def relations(base):
# if base is a factory then we want the related type
try:
base = canonical_matcher_type(base)
except MatcherTypeException:
pass
table = singleton(Relations, dict)
if base not in table:
table[base] = Relations(base)
return table[base]
def relations(base):
# if base is a factory then we want the related type
try:
base = canonical_matcher_type(base)
except MatcherTypeException:
pass
table = singleton(Relations, dict)
if base not in table:
table[base] = Relations(base)
return table[base]
def singleton(cls):
'''
Get a singleton instance.
'''
return singleton(cls)
def singleton(cls):
'''
Get a singleton instance.
'''
return singleton(cls)