用__attribute__((deprecated)) 管理过时代码。同一时候保留兼容的接口

Linux下：

#define  DEPR_AFTER __attribute__((deprecated))#define  DEPR_BEFOR class DEPR_BEFOR AAA{}DEPR_AFTER;int main(int argc, char** argv){    typedef float T;    AAA aa;    return 0;}

g++ main.cpp -o main

main.cpp: In function ‘int main(int, char**)’:

main.cpp:16:9: warning: ‘AAA’ is deprecated (declared at main.cpp:9) [-Wdeprecated-declarations]

WINDOWS下：

对于VC，类似如OPENCV定义：

#if defined __GNUC__    #define __CV_GPU_DEPR_BEFORE__    #define __CV_GPU_DEPR_AFTER__ __attribute__ ((deprecated))#elif defined(__MSVC__) //|| defined(__CUDACC__)    #pragma deprecated(DevMem2D_)    #define __CV_GPU_DEPR_BEFORE__ __declspec(deprecated)    #define __CV_GPU_DEPR_AFTER__#else    #define __CV_GPU_DEPR_BEFORE__    #define __CV_GPU_DEPR_AFTER__#endif