def calculate(self, vars_value):
"""Function returns the result of the equation."""
tokens = copy.deepcopy(self.token_list)
variable = self.var_value(vars_value)
parser = Parser(self.token_list, variable)
tree = parser.parse()
interpreter = Interpreter()
value = interpreter.visit(tree)
self.token_list = tokens
return value.value
ctx.symbol_table = symb_table
while (True):
line = input('cassian: ')
if (line == ':q'):
break
elif (line == 'st'):
print(ctx.symbol_table)
continue
elif (line == 'cls'):
ctx.restart(['null', 'false', 'true'])
continue
tokens, error = lex.scanner('<stdin>', line)
if (error):
print(error)
else:
# print(tokens)
ast = par.parse(tokens)
if (ast.error):
print(ast.error)
else:
# print(type(ast.node).__name__)
res = inter.visit(ast.node, ctx)
if (res.error):
print(res.error)
elif (res.value):
print(res.value)