def endvisit_function(self, node):
symbol = self.symbol_stack.pop()
scope = self.scope_stack.pop()
assert isinstance(symbol, FunctionSymbol), 'Not a function symbol'
for arg in node.get_parameters():
# given the fact that the name is not directly equivalent to the one as stated in the model,
# we have to get it by the sub-visitor
data_type_visitor = ASTDataTypeVisitor()
arg.get_data_type().accept(data_type_visitor)
type_name = data_type_visitor.result
# first collect the types for the parameters of the function symbol
symbol.add_parameter_type(PredefinedTypes.get_type(type_name))
# update the scope of the arg
arg.update_scope(scope)
# create the corresponding variable symbol representing the parameter
var_symbol = VariableSymbol(
element_reference=arg,
scope=scope,
name=arg.get_name(),
block_type=BlockType.LOCAL,
is_predefined=False,
is_function=False,
is_recordable=False,
type_symbol=PredefinedTypes.get_type(type_name),
variable_type=VariableType.VARIABLE)
assert isinstance(scope, Scope)
scope.add_symbol(var_symbol)
if node.has_return_type():
data_type_visitor = ASTDataTypeVisitor()
node.get_return_type().accept(data_type_visitor)
symbol.set_return_type(
PredefinedTypes.get_type(data_type_visitor.result))
else:
symbol.set_return_type(PredefinedTypes.get_void_type())
self.block_type_stack.pop() # before leaving update the type
def visit_ode_function(self, node):
"""
Private method: Used to visit a single ode-function, create the corresponding symbol and update the scope.
:param node: a single ode-function.
:type node: ast_ode_function
"""
data_type_visitor = ASTDataTypeVisitor()
node.get_data_type().accept(data_type_visitor)
type_symbol = PredefinedTypes.get_type(data_type_visitor.result)
# now a new symbol
symbol = VariableSymbol(element_reference=node,
scope=node.get_scope(),
name=node.get_variable_name(),
block_type=BlockType.EQUATION,
declaring_expression=node.get_expression(),
is_predefined=False,
is_function=True,
is_recordable=node.is_recordable,
type_symbol=type_symbol,
variable_type=VariableType.VARIABLE)
symbol.set_comment(node.get_comment())
# now update the scopes
node.get_scope().add_symbol(symbol)
node.get_data_type().update_scope(node.get_scope())
node.get_expression().update_scope(node.get_scope())
def visit_declaration(self, node: ASTDeclaration) -> None:
"""
Private method: Used to visit a single declaration, update its scope and return the corresponding set of symbols
:param node: a declaration AST node
:return: the scope is updated without a return value.
"""
expression = node.get_expression() if node.has_expression() else None
visitor = ASTDataTypeVisitor()
node.get_data_type().accept(visitor)
type_name = visitor.result
# all declarations in the state block are recordable
is_recordable = (node.is_recordable
or self.block_type_stack.top() == BlockType.STATE)
init_value = node.get_expression() if self.block_type_stack.top(
) == BlockType.STATE else None
# split the decorators in the AST up into namespace decorators and other decorators
decorators = []
namespace_decorators = {}
for d in node.get_decorators():
if isinstance(d, ASTNamespaceDecorator):
namespace_decorators[str(d.get_namespace())] = str(
d.get_name())
else:
decorators.append(d)
# now for each variable create a symbol and update the scope
block_type = None
if not self.block_type_stack.is_empty():
block_type = self.block_type_stack.top()
for var in node.get_variables(
): # for all variables declared create a new symbol
var.update_scope(node.get_scope())
type_symbol = PredefinedTypes.get_type(type_name)
vector_parameter = var.get_vector_parameter()
symbol = VariableSymbol(element_reference=node,
scope=node.get_scope(),
name=var.get_complete_name(),
block_type=block_type,
declaring_expression=expression,
is_predefined=False,
is_inline_expression=False,
is_recordable=is_recordable,
type_symbol=type_symbol,
initial_value=init_value,
vector_parameter=vector_parameter,
variable_type=VariableType.VARIABLE,
decorators=decorators,
namespace_decorators=namespace_decorators)
symbol.set_comment(node.get_comment())
node.get_scope().add_symbol(symbol)
var.set_type_symbol(Either.value(type_symbol))
# the data type
node.get_data_type().update_scope(node.get_scope())
# the rhs update
if node.has_expression():
node.get_expression().update_scope(node.get_scope())
# the invariant update
if node.has_invariant():
node.get_invariant().update_scope(node.get_scope())
def visit_declaration(self, node):
"""
Private method: Used to visit a single declaration, update its scope and return the corresponding set of
symbols
:param node: a declaration object.
:type node: ast_declaration
:return: the scope is update without a return value.
:rtype: void
"""
expression = node.get_expression() if node.has_expression() else None
visitor = ASTDataTypeVisitor()
node.get_data_type().accept(visitor)
type_name = visitor.result
# all declarations in the state block are recordable
is_recordable = (node.is_recordable
or self.block_type_stack.top() == BlockType.STATE
or self.block_type_stack.top()
== BlockType.INITIAL_VALUES)
init_value = node.get_expression() if self.block_type_stack.top(
) == BlockType.INITIAL_VALUES else None
vector_parameter = node.get_size_parameter()
# now for each variable create a symbol and update the scope
for var in node.get_variables(
): # for all variables declared create a new symbol
var.update_scope(node.get_scope())
type_symbol = PredefinedTypes.get_type(type_name)
symbol = VariableSymbol(element_reference=node,
scope=node.get_scope(),
name=var.get_complete_name(),
block_type=self.block_type_stack.top(),
declaring_expression=expression,
is_predefined=False,
is_function=node.is_function,
is_recordable=is_recordable,
type_symbol=type_symbol,
initial_value=init_value,
vector_parameter=vector_parameter,
variable_type=VariableType.VARIABLE)
symbol.set_comment(node.get_comment())
node.get_scope().add_symbol(symbol)
var.set_type_symbol(Either.value(type_symbol))
# the data type
node.get_data_type().update_scope(node.get_scope())
# the rhs update
if node.has_expression():
node.get_expression().update_scope(node.get_scope())
# the invariant update
if node.has_invariant():
node.get_invariant().update_scope(node.get_scope())
return
def visitDataType(self, ctx):
is_int = (True if ctx.isInt is not None else False)
is_real = (True if ctx.isReal is not None else False)
is_string = (True if ctx.isString is not None else False)
is_bool = (True if ctx.isBool is not None else False)
is_void = (True if ctx.isVoid is not None else False)
unit = self.visit(ctx.unitType()) if ctx.unitType() is not None else None
ret = ASTNodeFactory.create_ast_data_type(is_integer=is_int, is_boolean=is_bool,
is_real=is_real, is_string=is_string, is_void=is_void,
is_unit_type=unit, source_position=create_source_pos(ctx))
# now update the type
ret.accept(ASTDataTypeVisitor())
# self.data_type_visitor.visit_datatype(ret)
return ret
def __init__(self, tokens):
self.__comments = CommentCollectorVisitor(tokens)
self.data_type_visitor = ASTDataTypeVisitor()
