如何在 Vim 中快速更改变量名? [英] How to quickly change variable names in Vim?
问题描述
我正在使用 Vim 阅读大量包含许多单字母变量名的 C 和 Perl 代码.
I am using Vim to read through a lot of C and Perl code containing many single letter variable names.
在我阅读代码的过程中，如果有一些命令可以将变量的名称更改为更有意义的名称，这样我就可以更快地阅读其余部分.
It would be nice to have some command to change the name of a variable to something more meaningful while I’m in the process of reading the code, so that I could read the rest of it faster.
Vim 中是否有一些命令可以让我快速执行此操作?
Is there some command in Vim which could let me do this quickly?
我不认为正则表达式会起作用，因为:
I don’t think regexes would work because:
相同的单字母名称在不同的作用域块中可能有不同的用途；和
the same single letter name might have different purposes in different scoping blocks; and
相同的字母组合可以是另一个较长的变量名称、字符串文字或注释的一部分.
the same combination of letters could be part of another longer variable name, a string literal, or a comment.
是否有任何已知的解决方案?
Are there any known solutions?
推荐答案
以下是如何重命名定义在当前作用域{}中的变量.
The following is how to rename a variable which is defined in the current scope {}.
将光标移动到变量用法.按 gd.这意味着 - 将光标移动到定义.现在按 [{ - 这将带您进入范围开始.按 V - 将打开可视线选择.按 % - 将跳转到相反的 } 从而选择整个范围.按 :s/ - 替代命令的开始.<C-R>/ - 将插入匹配变量名称的模式(您在按下 gd 之前所在的名称)./newname/gc<CR> - 将在每次匹配时启动搜索并替换为确认.
Move your cursor to the variable usage. Press gd. Which means - move cursor to the definition.
Now Press [{ - this will bring you to the scope begin.
Press V - will turn on Visual Line selection.
Press % - will jump to the opposite } thus will select the whole scope.
Press :s/ - start of the substitute command.
<C-R>/ - will insert pattern that match variable name (that name you were on before pressing gd).
/newname/gc<CR> - will initiate search and replace with confirmation on every match.
现在你必须录制一个宏，甚至更好 - 映射一个键.
Now you have to record a macros or even better - map a key.
以下是最终的映射:
" For local replace
nnoremap gr gd[{V%::s/<C-R>///gc<left><left><left>
" For global replace
nnoremap gR gD:%s/<C-R>///gc<left><left><left>
把它放到你的 .vimrc 或者直接执行.在局部变量上按下 gr 后将带您到 :s 命令，您只需输入 new_variable_name 并按 Enter.
Put this to your .vimrc or just execute.
After this pressing gr on the local variable will bring you to :s command where you simply should enter new_variable_name and press Enter.
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