协议编译器错误超出枚举值 0x88000000 的范围

Question

在原型文件中，我有一个枚举，就像我正在将它转换为 C++ 代码它抛出错误 Integer out of range for field(_G,_P,_L) 。在 https://developers.google.com/protocol-buffers/docs/proto3#enum 中说 "Enumerator constants must be in the range of a 32-bit integer" 。请帮我解决这个问题

枚举字段是

 pb_EnumTargetType_A = 0x40000000;
 tpb_EnumTargetType_G = 0x88000000;
 tpb_EnumTargetType_P = 0x8C000000;
  tpb_EnumTargetType_L = 0x8A000000;

Answer 1

我猜它会将此解释为正数数字，因此需要超过 32 位才能将其编码为有符号整数。将其写成有符号整数似乎可行：

pb_EnumTargetType_A = 0x40000000;
tpb_EnumTargetType_G = -2013265920; // 0x88000000
tpb_EnumTargetType_P = -1946157056; // 0x8C000000
tpb_EnumTargetType_L = -1979711488; // 0x8A000000

协议编译器错误超出枚举值 0x88000000 的范围

protoc compiler error out of range for enum value 0x88000000

protocol-buffers

protobuf-c