问题
What does pipe character do in vim command mode?
For example, :vimgrep /pattern/ file | copen
Does it act like a pipe in Linux Command Line? Contents of vimgrep gets piped to copen?
Or does it separate commands like ; in Command Line?
回答1:
| is used to execute more than one command at a time.
In your example:
:vimgrep /pattern/ file | copen
This finds for the pattern in the specified file and then opens a window to show current list of occurrence of pattern.
The second command (and subsequent commands) are only executed if the prior command succeeds.
回答2:
To OP's question: the latter.
This is actually a vi feature, not vim-specific, used to separate multiple commands. It was answered before here:
- What does <Bar> mean?
- Learning the Vi and Vim Editors, "special meaning as a separator of multiple ex commands".
来源：https://stackoverflow.com/questions/32943945/what-does-pipe-character-do-in-vim-command-mode-for-example-vimgrep-pattern