vim - 我如何 :substitute() with the case sensitive flag in vim?

Question

我想用:substitute(...)在vim中以区分大小写的方式，但没有这样做。

这是我要操作的变量:

let s:Var = 'foo BAR baz'

我当然可以明确设置 noic所以在以下几行 BAR (of s:Var) 未被替换:

set noic
let s:S1 = substitute(s:Var, 'bar', '___', '')
" print    foo BAR baz
echo s:S1 

相反，如果 ic已设置， BAR当然会被替换:

set ic 
let s:S2 = substitute(s:Var, 'bar', '___', '')
" print    foo ___ baz
echo s:S2

现在，我想我可以使用 I标志为 :substitute为了使其区分大小写，但情况似乎并非如此:

let s:S3 = substitute(s:Var, 'bar', '___', 'I')
" print   foo ___ baz
" instead of the expected foo BAR baz
echo s:S3

I的帮助旗帜写着:

[I] Don't ignore case for the pattern.  The 'ignorecase' and 'smartcase'
    options are not used.
    {not in Vi}

我对这些行的理解是，使用该标志时，不应替换 BAR。

Answer 1

关于[I]的帮助信息你引用的是不是 为 substitute() 功能 .它适用于 :s命令。

旗帜substitute()功能可以有 "g"或 "" .如果你想用这个函数做区分大小写的匹配，添加 \C在您的模式中，例如:

substitute(s:Var, '\Cbar', '___', '')

检查此帮助文本:

The result is a String, which is a copy of {expr}, in which
        the first match of {pat} is replaced with {sub}.
        When {flags} is "g", all matches of {pat} in {expr} are
        replaced.  Otherwise {flags} should be "".

        This works like the ":substitute" command (without any flags).
        But the matching with {pat} is always done like the 'magic'
        option is set and 'cpoptions' is empty (to make scripts
        portable).  'ignorecase' is still relevant, use |/\c| or |/\C|
        if you want to ignore or match case and ignore 'ignorecase'.
        'smartcase' is not used.  See |string-match| for how {pat} is
        used.