Question

我的.vimrc文件包含以下行：

let read_path = '/var/www/html/readContent.html'
function ReadContentProcess()
    if (expand('%:p') == read_path)
        call feedkeys("\<C-A>")
        call feedkeys("\<C-V>")
    endif
endfunction

当我运行call ReadContentProcess()时，我收到以下错误：

Error detected while processing fucntion ReadContentProcess:
Line 1:
E121: Undefined variable: read_path
E15: Invalid expression: (expand('%:p') == read_path)

为什么呢？我已将read_path定义为变量，为什么vim告诉我它不存在？

Answer 1

变量具有默认范围。在函数外部定义时，它具有全局范围g:。在函数内部，它具有局部范围l:。因此，您需要通过在read_path前加g:

来告诉vim您想要哪个变量

let read_path = '/var/www/html/readContent.html'
function ReadContentProcess()
    if (expand('%:p') == g:read_path)
        call feedkeys("\<C-A>")
        call feedkeys("\<C-V>")
    endif
end function

来自:help g:（以及之后的部分）

                                                global-variable g:var g:
Inside functions global variables are accessed with "g:".  Omitting this will
access a variable local to a function.  But "g:" can also be used in any other
place if you like.

                                                local-variable l:var l:
Inside functions local variables are accessed without prepending anything.
But you can also prepend "l:" if you like.  However, without prepending "l:"
you may run into reserved variable names.  For example "count".  By itself it
refers to "v:count".  Using "l:count" you can have a local variable with the
same name.

vim：函数中的未定义变量

1 个答案: