def label_declarations(node):
global current_lexem
current_node = Node('<label_declarations>')
if current_lexem['lexem'] == 'LABEL':
add_current_item(current_node)
next_lexem()
if unsigned_integer(current_node):
node.add(current_node)
error_print('NOT_FOUND', 'unsigned_integer')
return True
if label_list(current_node):
return True
if current_lexem['code'] != 59:
node.add(current_node)
error_print('NOT_FOUND', ';')
return True
add_current_item(current_node)
node.add(current_node)
next_lexem()
elif current_lexem['lexem'] == 'BEGIN':
current_node.add(Node('<empty>'))
node.add(current_node)
return False
else:
node.add(current_node)
error_print('NOT_FOUND', 'LABEL')
return True
def alternative_part(node):
global current_lexem
current_node = Node('<alternative_part>')
if current_lexem['lexem'] == 'ELSE':
add_current_item(current_node)
next_lexem()
if statements_list(current_node):
return True
else:
next = take_next_item()
if current_lexem['lexem'] == 'ENDIF':
current_node.add(Node('<empty>'))
node.add(current_node)
return False
def statements_list(node):
global statements_stack
current_node = Node('<statements_list>')
if not statement(current_node):
statements_list(current_node)
node.add(current_node)
return False
if current_lexem['lexem'] in empty_authorized:
current_node.add(Node('<empty>'))
node.add(current_node)
return False
error_print('UNEXPECTED')
node.add(current_node)
return True
def label_list(node):
global current_lexem
current_node = Node('<label_list>')
if current_lexem['lexem'] == ',':
add_current_item(current_node)
next_lexem()
if unsigned_integer(current_node):
error_print('NOT_FOUND', 'unsigned_integer')
return True
if label_list(current_node):
return True
node.add(current_node)
else:
if not unsigned_integer(current_node):
error_print('NOT_FOUND')
return True
else:
# print next_item
current_node.add(Node('<empty>'))
node.add(current_node)