LockedDown 2021-06-23 16:17 采纳率: 100%
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已结题

这报错是为啥，DataWrapper后面就报错

no instance(s) of type variable(s) exist so that String conforms to MM310S02Result inference variable D has incompatible bounds: equality constraints: MM310S02Result lower bounds: String

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  • CSDN专家-Time 2021-06-23 16:19
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    似乎是没有实例导致的。no instance(s) of type variable(s) exist so that String conforms to MM310S02

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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