check_compile_time(sizeof(IPHeader) == 20);
check_compile_time(offsetof(IPHeader, versionAndHeaderLength) == 0);
check_compile_time(offsetof(IPHeader, differentiatedServices) == 1);
check_compile_time(offsetof(IPHeader, totalLength) == 2);
check_compile_time(offsetof(IPHeader, identification) == 4);
check_compile_time(offsetof(IPHeader, flagsAndFragmentOffset) == 6);
check_compile_time(offsetof(IPHeader, timeToLive) == 8);
check_compile_time(offsetof(IPHeader, protocol) == 9);
check_compile_time(offsetof(IPHeader, headerChecksum) == 10);
check_compile_time(offsetof(IPHeader, sourceAddress) == 12);
check_compile_time(offsetof(IPHeader, destinationAddress) == 16);
1check_compile_time 改为 __Check_Compile_Time
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