def Set(self, c):
""" Moves value and type of given constant to the variable. """
if c.GetType() == None:
raise Err.MissingValueException('missing value')
if self.GetType() == None:
Variable.varcount += 1
if c.GetType() == int:
self.value = Const.IntConstant(c.GetValue())
elif c.GetType() == str:
self.value = Const.StringConstant(c.GetValue())
elif c.GetType() == bool:
self.value = Const.BoolConstant(c.GetValue())
else:
raise Err.SemanticException('incompatible types')
def __eq__(self, c):
""" EQ operation. """
if self.GetType() == None or c.GetType() == None:
raise Err.MissingValueException('invalid operation')
return self.value.__eq__(c)
def __repr__(self):
""" Makes Variable representable as str. """
if self.GetType() == None:
raise Err.MissingValueException('invalid operation')
return repr(self.value)
def __getitem__(self, pos):
""" GETCHAR operation. """
if self.GetType() == None or pos.GetType() == None:
raise Err.MissingValueException('invalid operation')
return self.value.__getitem__(pos)
def __len__(self):
""" STRLEN operation. """
if self.GetType() == None:
raise Err.MissingValueException('invalid operation')
return self.value.__len__()
def Pops(self):
""" Pops and returns top item from the datastack. """
try:
return self.datastack.Pop()
except:
raise Err.MissingValueException('Empty data stack!')
def PopPC(self):
""" Pops program counter position from the callstack. """
try:
self.pc = self.callstack.Pop()
except:
raise Err.MissingValueException('Empty call stack!')