在文件末尾的反斜杠换行符警告 [英] Backslash newline at end of file warning

问题描述

使用此代码：

#include <iostream>


int main(int argc, char *argv[])
{

  return 0;
}


/** run2: A macro to call a function. */
#define run2( function, ctype, dim ) \
if ( operation == #function ) \
{ \
  if ( componentType == #ctype && Dimension == dim ) \
  { \
    typedef itk::Image< ctype, dim > ImageType; \
    function< ImageType >( inputFileName, outputFileName, radius, algorithm, useCompression ); \
    supported = true; \
  } \
}

我收到一条警告：backslash-换行符到文件末尾

I get a warning: backslash-newline at end of file

任何想法如何使它消失？

Any idea how to make it go away?

David

推荐答案

问题是代码末尾没有换行符。 C ++标准版; 2.1 / 2说：

The problem is that there's no new-line character in the end of your code. C++ Standard §2.1/2 says:

< ...>如果一个不是
empty的源文件不是以新行
字符结束，或者以换行符
结束，之后是
反斜杠字符，行为是
未定义。

<...>If a source file that is not empty does not end in a new-line character, or ends in a new-line character immediately preceded by a backslash character, the behavior is undefined.

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