Vim为什么将\\ n视为DOS格式文件的有效EOL字符？

Question

I was testing how Vim works with EOL characters.

If I create a file that looks like this:

and then load the file into Vim, explicitly stating that I want the file to be loaded in the dos fileformat (and not in the unix fileformat), the file looks like it has no errors:

How I would expect the file to be displayed:

Is there a deeper reason for this (ie in how Vim stores newline characters internally) or is this just a convenience mechanism in Vim, in case the person that loads the file, specifies the wrong file format? If the former, please say about the newline mechanism a little more in the context of my example.

Answer 1

I think this is what happens. The file format (can be dos or unix ) can be detected or manually set when opening a file. If it is set to dos , Vim removes both \\r\\n\\ or \\n from the file and replace them with its internal form of line ending (If it's unix , it replaces \\n only, so \\r\\n will be left as \\r which is displayed as ^J ).

When you write to file, Vim will replace the internal EOL with the EOL corresponding with your fileformat – CRLF for dos , LF for unix .