class Function(object):
    def __init__(self, name, code=None):
        self.name = name
        self.code = []
        self.labels = {}

        if code is not None:
            self.load(code)

    def load(self, code):
        pc = 0

        for inst in code:
            if inst[0] == "label":
                label = inst[1]
                self.labels[label] = pc
            else:
                self.code.insert(pc, inst)
                pc += 1

    def label(self, label):
        return self.labels[label]