def lookup_name(self, name):
"""
Determine the full name (including context) for a symbol name.
- If the name begins with a context mark, it's in the context
given by $Context.
- Otherwise, if it contains a context mark, it's already fully
specified.
- Otherwise, it doesn't contain a context mark: try $Context,
then each element of $ContextPath, taking the first existing
symbol.
- Otherwise, it's a new symbol in $Context.
"""
assert isinstance(name, six.string_types)
# Bail out if the name we're being asked to look up is already
# fully qualified.
if fully_qualified_symbol_name(name):
return name
current_context = self.get_current_context()
if '`' in name:
if name.startswith('`'):
return current_context + name.lstrip('`')
return name
with_context = current_context + name
if not self.have_definition(with_context):
for ctx in self.get_context_path():
n = ctx + name
if self.have_definition(n):
return n
return with_context
def lookup_name(self, name):
"""
Determine the full name (including context) for a symbol name.
- If the name begins with a context mark, it's in the context
given by $Context.
- Otherwise, if it contains a context mark, it's already fully
specified.
- Otherwise, it doesn't contain a context mark: try $Context,
then each element of $ContextPath, taking the first existing
symbol.
- Otherwise, it's a new symbol in $Context.
"""
assert isinstance(name, six.string_types)
# Bail out if the name we're being asked to look up is already
# fully qualified.
if fully_qualified_symbol_name(name):
return name
current_context = self.get_current_context()
if '`' in name:
if name.startswith('`'):
return current_context + name.lstrip('`')
return name
with_context = current_context + name
if not self.have_definition(with_context):
for ctx in self.get_context_path():
n = ctx + name
if self.have_definition(n):
return n
return with_context
def dynamic_scoping(func, vars, evaluation):
original_definitions = {}
for var_name, new_def in vars.items():
assert fully_qualified_symbol_name(var_name)
original_definitions[
var_name] = evaluation.definitions.get_user_definition(var_name)
evaluation.definitions.reset_user_definition(var_name)
if new_def is not None:
new_def = new_def.evaluate(evaluation)
evaluation.definitions.set_ownvalue(var_name, new_def)
try:
result = func(evaluation)
finally:
for name, definition in original_definitions.items():
evaluation.definitions.add_user_definition(name, definition)
return result
def dynamic_scoping(func, vars, evaluation):
original_definitions = {}
for var_name, new_def in vars.items():
assert fully_qualified_symbol_name(var_name)
original_definitions[
var_name] = evaluation.definitions.get_user_definition(var_name)
evaluation.definitions.reset_user_definition(var_name)
if new_def is not None:
new_def = new_def.evaluate(evaluation)
evaluation.definitions.set_ownvalue(var_name, new_def)
try:
result = func(evaluation)
finally:
for name, definition in original_definitions.items():
evaluation.definitions.add_user_definition(name, definition)
return result
def dynamic_scoping(func, vars, evaluation: Evaluation):
"""
Changes temporarily the value of a set of symbols listed in vars,
and evaluates func(evaluation)
"""
original_definitions = {}
for var_name, new_def in vars.items():
assert fully_qualified_symbol_name(var_name)
original_definitions[
var_name] = evaluation.definitions.get_user_definition(var_name)
evaluation.definitions.reset_user_definition(var_name)
if new_def is not None:
new_def = new_def.evaluate(evaluation)
evaluation.definitions.set_ownvalue(var_name, new_def)
try:
result = func(evaluation)
finally:
for name, definition in original_definitions.items():
evaluation.definitions.add_user_definition(name, definition)
return result