clang vs gcc : 代码出错提示功能对比

今天研究c++ const 的问题,顺便做了一下gcc 与 clang 的代码编译错误提示对比,结论是,clang这个晚辈确实比gcc人性化多了。

参考:

http://www.cnblogs.com/Fancyboy2004/archive/2008/12/23/1360810.html

以下是测试代码:

#include <cstdlib>

class Apple
{
    public:
        Apple (){};     /* constructor */

        int GetCount()  /* 非const 成员函数 */
        {
            return m_iData;
        };
    protected:
        int m_iData;
}; /* -----  end of class Apple  ----- */

using namespace std;


int main ( int argc, char *argv[] )
{
    const Apple apple;
    apple.GetCount();    /* 错误 */

	return EXIT_SUCCESS;
}		// ----------  end of function main  ---------- 
//save to a.cc
 

gcc编译命令:

$ g++ a.cc
a.cc: In function ‘int main(int, char**)’:
a.cc:22: error: passing ‘const Apple’ as ‘this’ argument of ‘int Apple::GetCount()’ discards qualifiers

clang:

$ clang++ a.cc
a.cc:22:5: error: member function 'GetCount' not viable: 'this' argument has
      type 'const Apple', but function is not marked const
    apple.GetCount();    /* 错误 */
    ^~~~~
a.cc:8:13: note: 'GetCount' declared here
        int GetCount()  /* 非const 成员函数 */
            ^
1 error generated.
 

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转载自hexlee.iteye.com/blog/1563557