[PIR] standardize the use of value[-4].#57373
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| std::vector<std::vector<pir::OpResult>> Vjp( | ||
| pir::Operation* op, | ||
| const std::vector<std::vector<pir::OpResult>>& out_grads, |
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这里新增一个重载的Vjp 函数什么背景？我看上面是把入参类型由Value改为了OpResult
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上层python api调用vjp接口时，传递的是std::vector<std::vector<pir::OpResult>>。 但下层op build接口接受的参数在本次PR中被修正为了std::vector<std::vector<pir::Value>>。 中间存在gap。 OpResult是Value的派生类，这儿新增了一个重载接口，进行该参数的类型转换。
后续控制流支持python api的话，也需要逐步将python相关代码中部分对OpResult的使用替换为Value。
zhangbo9674
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Description
规范化代码中对Value的使用[-4]。
Value分两种，OpResult和BlockArgument. 由于之前没有BlockArgument， 大家都是混用Value和OpResult， 现在有了BlockArguemnt, 需要区分Value和OpResult的使用。
在需要支持BlockArgument的地方，将原本的OpResult升级为Value，使其能够兼容BlockArgument的行为。
本pr内容：
参考pr:
Other
Pcard-67164