def get_object(self, object_name, namespace_parts=None):
"""
Return the object identified by ``object_name``, which is under the
namespace whose names are ``namespace_parts``.
:param object_name: The name of the object to be returned.
:type object_name: basestring
:param namespace_parts: The sub-namespace that contains the object
identified by ``object_name``, represented by a list of names; or,
``None`` if the object is in the current namespace.
:type namespace_parts: list
:return: The requested object.
:rtype: Operand
:raises ScopeError: If the requested object doesn't exist in the
namespace, or if the sub-namespace in ``namespace_parts`` doesn't
exist.
"""
ns = self._get_subnamespace(namespace_parts)
if ns is None or object_name not in ns.objects:
msg = u'No such object "%s"' % object_name
if namespace_parts:
msg = u'%s in %s' % (msg, u":".join(namespace_parts))
raise ScopeError(msg)
return ns.objects[object_name]
def get_object(self, object_name, namespace_parts=None):
"""
Return the object identified by ``object_name``, which is under the
namespace whose names are ``namespace_parts``.
:param object_name: The name of the object to be returned.
:type object_name: basestring
:param namespace_parts: The sub-namespace that contains the object
identified by ``object_name``, represented by a list of names; or,
``None`` if the object is in the current namespace.
:type namespace_parts: list
:return: The requested object.
:rtype: Operand
:raises ScopeError: If the requested object doesn't exist in the
namespace, or if the sub-namespace in ``namespace_parts`` doesn't
exist.
"""
object_name = object_name.lower()
ns = self._get_subnamespace(namespace_parts)
if ns is None:
msg = u'No such object "%s"' % object_name
if namespace_parts:
msg = u'%s in %s' % (msg, u":".join(namespace_parts))
raise ScopeError(msg)
if namespace_parts is not None:
ns2 = self._get_subnamespace(namespace_parts[0:-1])
from booleano.operations import ArrayVariable
if (object_name not in ns.objects and namespace_parts is not None
and namespace_parts[-1].lower() in ns2.objects
and isinstance(ns2.objects[namespace_parts[-1].lower()],
ArrayVariable)):
var = ns2.objects[namespace_parts[-1].lower()]
var.set_index(object_name)
return var
if ns is None or object_name not in ns.objects:
msg = u'No such object "%s"' % object_name
if namespace_parts:
msg = u'%s in %s' % (msg, u":".join(namespace_parts))
raise ScopeError(msg)
return ns.objects[object_name]
def add_object(self, obj):
"""
Add the ``obj`` object to this symbol table.
:param obj: The bound operand to be added.
:type obj: :class:`Bind`
:raises booleano.exc.ScopeError: If ``obj`` is already included or it
already belongs to another symbol table.
"""
# Checking if it's safe to include the object:
if obj.symbol_table:
raise ScopeError(u"%s already belongs to %s" %
(obj.global_name, obj.symbol_table))
if obj in self.objects or obj.symbol_table:
raise ScopeError(u"An equivalent of %s is already defined in %s" %
(obj, self))
# It's safe to include it!
obj.symbol_table = self
self.objects.add(obj)
def add_subtable(self, table):
"""
Include ``table`` in the child tables of this symbol table.
:param table: The symbol table to be added.
:type table: :class:`SymbolTable`
:raises booleano.exc.ScopeError: If ``table`` is already included or it
already belongs to another symbol table.
"""
# Checking if it's safe to include the sub-table:
if table.symbol_table:
raise ScopeError(u"%s already belongs to %s" %
(table, table.symbol_table))
if table in self.subtables:
raise ScopeError(
u"An equivalent of %s is already available in %s" %
(table, self))
# It's safe to include it!
table.symbol_table = self
self.subtables.add(table)