def get_symbol(self,
symbol_id: str,
is_internal: bool = False) -> Optional[ISymbol]:
"""
Tries to get the symbol by its id name
:param symbol_id: the id name of the symbol
:return: the symbol if found. None otherwise.
:rtype: ISymbol or None
"""
if symbol_id in self.symbols:
# the symbol exists in the global scope
return self.symbols[symbol_id]
if is_internal:
from boa3.model.importsymbol import Import
imports = [
symbol for symbol in self.symbols.values()
if isinstance(symbol, Import)
]
for package in imports:
if symbol_id in package.all_symbols:
return package.all_symbols[symbol_id]
# the symbol may be a built in. If not, returns None
from boa3.model.builtin.builtin import Builtin
found_symbol = Builtin.get_symbol(symbol_id)
if found_symbol is None and isinstance(
symbol_id, str) and self.is_exception(symbol_id):
found_symbol = Builtin.Exception.return_type
return found_symbol
def visit_Call(self, call: ast.Call) -> Optional[IType]:
"""
Visitor of a function call node
:param call: the python ast function call node
:return: the result type of the called function. None if the function is not found
"""
func_id = self.visit(call.func)
func_symbol = self.get_symbol(func_id)
# if func_symbol is None, the called function may be a function written after in the code
# that's why it shouldn't log a compiler error here
if func_symbol is None:
return None
if not isinstance(func_symbol, Callable):
# verifiy if it is a builtin method with its name shadowed
func = Builtin.get_symbol(func_id)
func_symbol = func if func is not None else func_symbol
func_symbol = Builtin.Exception if func_symbol is Type.exception else func_symbol
if not isinstance(func_symbol, Callable):
# the symbol doesn't exists
self._log_error(
CompilerError.UnresolvedReference(call.func.lineno,
call.func.col_offset,
func_id))
elif isinstance(func_symbol, IBuiltinMethod):
if func_symbol.body is not None:
self._builtin_functions_to_visit[func_id] = func_symbol
elif func_symbol is Builtin.NewEvent:
new_event = self.create_new_event(call)
self.__include_callable(new_event.identifier, new_event)
self._current_event = new_event
return self.get_type(call.func)
def validate_builtin_callable(self, callable_id: str, callable_target: ISymbol) -> ISymbol:
if not isinstance(callable_target, Callable):
# verify if it is a builtin method with its name shadowed
call_target = Builtin.get_symbol(callable_id)
if not isinstance(call_target, Callable) and self.is_exception(callable_id):
call_target = Builtin.Exception
callable_target = call_target if call_target is not None else callable_target
return callable_target
def visit_Attribute(self, attribute: ast.Attribute) -> Union[ISymbol, str]:
"""
Gets the attribute inside the ast node
:param attribute: the python ast attribute node
:return: returns the type of the value, the attribute symbol and its id if the attribute exists.
Otherwise, returns None
"""
value_id = attribute.value.id if isinstance(attribute.value, ast.Name) else None
value: ISymbol = self.get_symbol(value_id) if value_id is not None else self.visit(attribute.value)
if isinstance(value, Variable):
value = value.type
if hasattr(value, 'symbols') and attribute.attr in value.symbols:
return value.symbols[attribute.attr]
elif Builtin.get_symbol(attribute.attr) is not None:
return Builtin.get_symbol(attribute.attr)
else:
return '{0}.{1}'.format(value_id, attribute.attr)
def get_symbol(self,
symbol_id: str,
is_internal: bool = False,
check_raw_id: bool = False,
origin_node: ast.AST = None) -> Optional[ISymbol]:
"""
Tries to get the symbol by its id name
:param symbol_id: the id name of the symbol
:return: the symbol if found. None otherwise.
:rtype: ISymbol or None
"""
if symbol_id in self.symbols:
# the symbol exists in the global scope
return self.symbols[symbol_id]
if check_raw_id:
found_symbol = self._search_by_raw_id(symbol_id,
list(self.symbols.values()))
if found_symbol is not None:
# the symbol exists in the global scope, but with an alias different from the original name
return found_symbol
if is_internal:
from boa3.model import imports
found_symbol = imports.builtin.get_internal_symbol(symbol_id)
if isinstance(found_symbol, ISymbol):
return found_symbol
# the symbol may be a built in. If not, returns None
from boa3.model.builtin.builtin import Builtin
found_symbol = Builtin.get_symbol(symbol_id)
if found_symbol is None and isinstance(
symbol_id, str) and self.is_exception(symbol_id):
found_symbol = Builtin.Exception.return_type
if origin_node is not None and found_symbol is None:
self._log_error(
UnresolvedReference(line=origin_node.lineno,
col=origin_node.col_offset,
symbol_id=symbol_id))
return found_symbol
def get_symbol(self, symbol_id: str) -> Optional[ISymbol]:
"""
Tries to get the symbol by its id name
:param symbol_id: the id name of the symbol
:return: the symbol if found. None otherwise.
:rtype: ISymbol or None
"""
if symbol_id in self.symbols:
# the symbol exists in the global scope
return self.symbols[symbol_id]
else:
# the symbol may be a built in. If not, returns None
from boa3.model.builtin.builtin import Builtin
found_symbol = Builtin.get_symbol(symbol_id)
if found_symbol is None and isinstance(
symbol_id, str) and self.is_exception(symbol_id):
found_symbol = Builtin.Exception.return_type
return found_symbol
def get_symbol(self, identifier: str) -> ISymbol:
"""
Gets a symbol in the symbol table by its id
:param identifier: id of the symbol
:return: the symbol if exists. Symbol None otherwise
"""
if self._current_method is not None and identifier in self._current_method.symbols:
return self._current_method.symbols[identifier]
elif identifier in self.symbol_table:
return self.symbol_table[identifier]
# the symbol may be a built in. If not, returns None
symbol = Builtin.get_symbol(identifier)
if symbol is not None:
return symbol
split = identifier.split('.')
if len(split) > 1:
attribute, symbol_id = '.'.join(split[:-1]), split[-1]
attr = self.get_symbol(attribute)
if hasattr(attr, 'symbols') and symbol_id in attr.symbols:
return attr.symbols[symbol_id]
return Type.none