在 2025-5-9 22:24, наб 写道:
On Fri, May 09, 2025 at 10:31:38AM +0800, LIU Hao wrote:在 2025-5-4 22:24, наб 写道: In C++ it's common to have `NULL` defined as `0`.This is not the case. I think I was a little overzealous to say that "C++11 <=> NULL=nullptr" (both C and C++ allow any "null-pointer constant"), but both GCC and Clang define it as __null.
`NULL` is `0` if it's MSVC. Also, I believe you have read LLVM source; we prefer the MSVC definition (clang/lib/Headers/__stddef_null.h): ``` #ifdef __cplusplus #if !defined(__MINGW32__) && !defined(_MSC_VER) #define NULL __null #else #define NULL 0 #endif #else #define NULL ((void*)0) #endif ```
Even /if/ this weren't the case, mingw-w64 /already/ uses the conventional #define NULL __null in /some/ headers, but not others. Even /if/ this is legal, having inconsistent NULL values is undesirable and fixing it to be consistent is also a good goal. Please reconsider.
Yes there's inconsistency, but as shown above, I'd prefer we define `NULL` as zero in C++. -- Best regards, LIU Hao
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