TokenStreamRewriter.py 文件源码

def getText(self, program_name, interval):
        """
        :type interval: Interval.Interval
        :param program_name:
        :param interval:
        :return:
        """
        rewrites = self.programs.get(program_name)
        start = interval.start
        stop = interval.stop

        # ensure start/end are in range
        if stop > len(self.tokens.tokens) - 1: stop = len(self.tokens.tokens) - 1
        if start < 0: start = 0

        # if no instructions to execute
        if not rewrites: return self.tokens.getText(interval)
        buf = StringIO()
        indexToOp = self._reduceToSingleOperationPerIndex(rewrites)
        i = start
        while all((i <= stop, i < len(self.tokens.tokens))):
            op = indexToOp.get(i)
            token = self.tokens.get(i)
            if op is None:
                if token.type != Token.EOF: buf.write(token.text)
                i += 1
            else:
                i = op.execute(buf)

        if stop == len(self.tokens.tokens)-1:
            for op in indexToOp.values():
                if op.index >= len(self.tokens.tokens)-1: buf.write(op.text)

        return buf.getvalue()