写宏遇到的问题：warning: backslash and newline separated by space - C

最新推荐文章于 2023-09-10 10:04:58 发布
转载 最新推荐文章于 2023-09-10 10:04:58 发布 · 768 阅读 · 0
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#C语言错误

本文介绍了一种使用C预处理宏进行调试的方法，并通过一个具体示例展示了如何利用宏输出文件名、行号及函数名等信息，帮助开发者快速定位问题。

http://blog.youkuaiyun.com/liyongming1982/article/details/6663031

原来是因为\ 后面多了一个空格

   附上一个刚刚写得调试用的例子：

[cpp]  view plain copy
  1. #define desay_debug(_string,myValue) \  
  2.     do{\  
  3.          c_snprintf(desay_info, \  
  4.                   250 - 1, \  
  5.                   "\ndesay: File: %s  Line#: %d  Func: %s()\n !!!:message is %s value is %d\n", \  
  6.                   __FILE__, \  
  7.                   __LINE__, \  
  8.                   __func__, \  
  9.                   _string, \  
  10.                   myValue); \  
  11.         desayEvent.ui4_msg_id=DESAY_MESSAGE_ID;\  
  12.         desayEvent.ui4_data1=(UINT32)&desay_info[0];\  
  13.         a_am_get_app_handle_from_name(&h_app_desay,"homepage");\  
  14.         c_app_send_msg(h_app_desay,0,&desayEvent,sizeof(DESAY_MSG_T),NULL,NULL);\  
  15.     }while(0)  
zlog日志系统开发时遇到的问题（1）
qq_41916360的博客
08-10 635
使用zlog日志框架开发日志系统遇到的一些问题
编译警告：backslash and newline separated by space
南沙的星星
04-17 6678
backslash and newline separated by space 原因是因为\ 后面多了一个空格 检查写的代码中将\后面的空格去掉就可以了.
c语言宏定义宏函数编译警告：warning: backslash and newline separated by space（\后不能有空格）
Dontla的博客
01-17 4465
如图： 这是因为“\”与下一行之间有空格（不能有空格的） 把空格删除后就好了 能正常编译通过
warning: backslash and newline separated by space
03-12 481
在写下面代码时候出现警告提示： char m_SPS[256] = { 0x67, 0x64, 0x00, 0x28, 0xAD, 0x84, 0x05, 0x45, 0x62, 0xB8, 0xAC, 0x54, 0x74, 0x20, 0x2A, 0x2B, \ 0x15, 0xC5, 0x62, 0xA3, 0xA1, 0x01, 0x51, 0x58, 0xAE,
编译疑问: Warning: Backslash and Newline separated by space
lexiaoyao521314的博客
10-27 434
背景知识: The backslash (\) character is used as the continuation character to continue #define statements and strings to the next line. 注意事项： GCC expects the backslash character to be the very last character on the line. 警告原因: This warning indicates th.
改为GCC11，然后cmakelists文件也修改了，但是还是报错：In file included from /home/guo/定位新代码/src/share/common/include/base/file.h:15, from /home/guo/定位新代码/src/share/common/include/base/file.cpp:1: /home/guo/定位新代码/src/share/common/include/base/macros.h:29:62: warning: backslash and newline separated by space 29 | expression; \ | In file included from /home/guo/定位新代码/src/share/common/include/base/file.h:15, from /home/guo/定位新代码/src/share/common/include/base/format.h:13, from /home/guo/定位新代码/src/share/common/include/base/format.cpp:1: /home/guo/定位新代码/src/share/common/include/base/macros.h:29:62: warning: backslash and newline separated by space 29 | expression; \ | [ 96%] Linking CXX shared library /home/guo/定位新代码/devel/lib/libabsl_log_flags.so [ 96%] Built target log_flags In file included from /home/guo/定位新代码/src/share/common/include/base/health_reporter.h:13, from /home/guo/定位新代码/src/share/common/include/base/health_reporter.cpp:1: /home/guo/定位新代码/src/share/common/include/base/macros.h:29:62: warning: backslash and newline separated by space 29 | expression; \ | [ 96%] Linking CXX shared library /home/guo/定位新代码/devel/lib/libabsl_flags_usage_internal.so In file included from /home/guo/定位新代码/src/share/common/include/base/health_reporter.h:15, from /home/guo/定位新代码/src/share/common/include/base/health_reporter.cpp:1: /home/guo/定位新代码/src/share/common/include/base/traits.h:3:10: fatal error: concepts: 没有那个文件或目录 3 | #include <concepts> | ^~~~~~~~~~ compilation terminated. make[2]: *** [share/common/include/base/CMakeFiles/common_base.dir/build.make:104：share/common/include/base/CMakeFiles/common_base.dir/health_reporter.cpp.o] 错误 1 make[2]: *** 正在等待未完成的任务.... [ 96%] Built target flags_usage_internal Consolidate compiler generated dependencies of target flags_usage [ 97%] Building CXX object share/common/include/abseil-cpp/absl/flags/CMakeFiles/flags_usage.dir/usage.cc.o In file included from /home/guo/定位新代码/src/share/common/include/base/node_base.h:17, from /home/guo/定位新代码/src/share/common/include/base/node_base.cpp:1: /home/guo/定位新代码/src/share/common/include/base/macros.h:29:62: warning: backslash and newline separated by space 29 | expression; \ | In file included from /home/guo/定位新代码/src/share/common/include/base/node_base.h:19, from /home/guo/定位新代码/src/share/common/include/base/node_base.cpp:1: /home/guo/定位新代码/src/share/common/include/base/traits.h:3:10: fatal error: concepts: 没有那个文件或目录 3 | #include <concepts>
10-15
2. 警告：`backslash and newline separated by space` -> 宏定义中反斜杠后面不能有空格 结合用户提供的CMakeLists.txt内容，我们进行如下修改： ### 解决方案 #### 1. 启用C++20标准支持 在CMakeLists.txt中，...
config/pallet_detect_class.h:23, from /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:12: /home/workspace/hangcha_visual_program/visual/include/config/lsingleton.h:40:34: warning: backslash and newline separated by space 40 | #define GET_LSingObj(class_name) \ | /home/workspace/hangcha_visual_program/visual/include/config/lsingleton.h:42:38: warning: backslash and newline separated by space 42 | #define DESTROY_LSingObj(class_name) \ | /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:17:6: error: no declaration matches 'bool Visual::PalletDetect::InitPalletDetectParam(std::string)' 17 | bool PalletDetect::InitPalletDetectParam(std::string yaml_dir){ | ^~~~~~~~~~~~ In file included from /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:12: /home/workspace/hangcha_visual_program/visual/include/config/pallet_detect_class.h:36:14: note: candidate is: 'template<class PointT> bool Visual::PalletDetect::InitPalletDetectParam(std::string)' 36 | bool InitPalletDetectParam(std::string yaml_dir); | ^~~~~~~~~~~~~~~~~~~~~ /home/workspace/hangcha_visual_program/visual/include/config/pallet_detect_class.h:30:11: note: 'class Visual::PalletDetect' defined here 30 | class PalletDetect{ | ^~~~~~~~~~~~ /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc: In member function 'void Visual::PalletDetect::PassThrough(const pcl::PointCloud<pcl::PointXYZ>&, pcl::PointCloud<pcl::PointXYZ>&, std::string&, float&, float&, bool)': /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:375:48: warning: 'void pcl::PassThrough<PointT>::setFilterLimitsNegative(bool) [with PointT = pcl::PointXYZ]' is deprecated: use inherited FilterIndices::setNegative() instead (It will be removed in PCL 1.13) [-Wdeprecated-declarations] 375 | pass.setFilterLimitsNegative(limit_negative); | ^ In file included from /home/workspace/hangcha_visual_program/visual/include/visual/pcl_common.h:19, from /home/workspace/hangcha_visual_program/visual/include/config/pallet_detect_class.h:14, from /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:12: /home/workspace/hangcha_visual_program/library/pcl1_12/include/pcl-1.12/pcl/filters/passthrough.h:156:7: note: declared here 156 | setFilterLimitsNegative (const bool limit_negative) | ^~~~~~~~~~~~~~~~~~~~~~~ /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc: In member function 'bool Visual::PalletDetect::GetClusters(const pcl::PointCloud<pcl::PointXYZ>&, const std::vector<pcl::PointIndices>&, std::vector<clusterOBBICP>&)': /home/workspace/hangcha_visual_program/visual/src/Auto/pallet_detect.cc:687:1: warning: no return statement in function returning non-void [-Wreturn-type] 687 | } | ^ make[2]: *** [CMakeFiles/visual.dir/build.make:271: CMakeFiles/visual.dir/src/Auto/pallet_detect.cc.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:125: CMakeFiles/visual.dir/all] Error 2 make: *** [Makefile:130: all] Error 2
最新发布
11-15
- **原因**：在C/C++等语言中，反斜杠（`\`）用作行继续符时，如果其后有空格或换行符处理不当，编译器会警告“反斜杠和换行符被空格分隔”（例如GCC的`warning: backslash and newline separated by space`）。...
warning: backslash and newline separated by space [enabled by default]
weixin_30258901的博客
04-16 1113
警告：反斜杠和换行符之间多了空格。 这种问题出现在宏定义 #define，并且有多行，每行之间要用 “\” 连接起来。 解决办法：删除“\” 后面的空格，直接紧跟回车。 转载于:https://www.cnblogs.com/lialong1st/p/8856157.html...
VSCode platformIO IDE报backslash and newline separated by space警告
perseverance51博客
08-18 219
VSCode platformIO IDE报backslash and newline separated by space警告 原因：是转义符后面又空格。
【C语言_Error】GCC编译错误
十二_的博客
09-10 867
在换行符后输入空格符就会报以上错误信息。
对经常使用的函数定义为宏 报错backslash and newline separated by space [enabled by default]
Gestwr博客
04-27 1182
backslash and newline separated by space [enabled by default]的解决： 宏定义的续行符 小心\后面不要有space #include<stdio.h> //宏定义的续行 小心\后面不要有space #define MAX(type)\ type max(type a,type b){ \ type ret; \ ......
PyCharm选择性忽略PEP8代码风格警告信息
Focusing on your own Mind :) －> 站在巨人的肩膀上
11-07 7684
用了几天的PyCharm，发现确实在编写Python代码上非常好用，但有一点体验不太好，就是代码编写时要按照PEP8代码风格编写，不然会有波浪线的警告信息。解决方法如下： 方法一： 将鼠标移到提示的地方，按alt+Enter，选择忽略（Ignore）这个错误即好。 方法二 打开：File - Settings…… - Editor - Inspections 在pyt
Apache命令——语法检查
weixin_33979203的博客
03-29 236
原文：Syntax of the Configuration Files Apache configuration files contain one directive per line. The backslash "\" may be used as the last character on a line to indicate that the directive continue...
linux apache问题检查,Apache命令——语法检查
weixin_29742557的博客
05-13 177
Apache configuration files contain one directive per line. The backslash "\" may be used as the last character on a line to indicate that the directive continues onto the next line. There must be no o...
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