Unverified50% confidenceFactExact time
Protobuf 向后兼容指新代码读取旧数据时缺失字段自动填充默认值(数值为0、字符串为空、布尔为false),向前兼容指旧代码遇到无法识别的字段编号时直接跳过
1
Sources
50%
Confidence
Long-term
Relevance
7/20/2026
First Seen
Sources
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