C++自定义编译期警告和错误信息

叁歲伎倆 2023-06-18 07:52 6阅读 0赞

# 1 MSVC编译器： #

使用\#pragma message来自定义警告信息和错误信息。  
注意：C++标准并不支持 \#pragma message，但是msvc支持。  
而msvc支持的\#pragma warning是大多是用来取消编译器警告，不支持抛出编译期警告，详情请参考官网 [warning杂注][warning]。

/** Transform expression \a _exp_ to string format. */
    #define __AUX_STR_EXP(_exp_) #_exp_
    /** Transform \a _exp_ to string format. */
    #define ___AUX_STR(_exp_) __AUX_STR_EXP(_exp_)
    /** location file name and file line */
    #define __LOCATION_STR __FILE__ "(" ___AUX_STR(__LINE__) ")"
    /** define warning message throw */
    #define throw_warning(_code_, _message_) message(__LOCATION_STR ": warning C" ___AUX_STR(_code_) ": " _message_)
    #define throw_error(_level_, _code_, _message_) message(__LOCATION_STR ":" _level_ " error C" ___AUX_STR(_code_) ": " _message_)
    
    // test
    #pragma throw_warning(10000, "this is a compile time warning message.")
    #pragma throw_error("", 10001, "this is a compile time error message.")
    #pragma throw_error("fatal", 10002, "this is a compile time fatal error message.")

**输出结果：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][20191201023456434.png]

# 2 C++标准的编译期错误信息： #

注意：C++标准并没有类似\#pragma warning的编译期警告信息.

#error this is a compile time error message.

**结果：**  
![在这里插入图片描述][20191201023921341.png]  
![在这里插入图片描述][20191201023930384.png]

[warning]: https://docs.microsoft.com/zh-cn/cpp/preprocessor/warning?f1url=https://msdn.microsoft.com/query/dev15.query?appId=Dev15IDEF1&l=ZH-CN&k=k%28warning_CPP%29;k%28warning%29;k%28DevLang-C%2b%2b%29;k%28TargetOS-Windows%29&rd=true&view=vs-2019
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191201023440482.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dVOTc5Nw==,size_16,color_FFFFFF,t_70
[20191201023456434.png]: https://img-blog.csdnimg.cn/20191201023456434.png
[20191201023921341.png]: https://img-blog.csdnimg.cn/20191201023921341.png
[20191201023930384.png]: https://img-blog.csdnimg.cn/20191201023930384.png