getqflist()                     *getqflist()*
        Returns a list with all the current quickfix errors.  Each
        list item is a dictionary with these entries:
            bufnr   number of buffer that has the file name,use
                bufname() to get the name
            lnum    line number in the buffer (first line is 1)
            col column number (first column is 1)
            vcol    non-zero: "col" is visual column
                zero: "col" is byte index
            nr  error number
            pattern search pattern used to locate the error
            text    description of the error
            type    type of the error,'E','1',etc.
            valid   non-zero: recognized error message

        When there is no error list or it's empty an empty list is
        returned. Quickfix list entries with non-existing buffer
        number are returned with "bufnr" set to zero.

        Useful application: Find pattern matches in multiple files and
        do something with them: >
            :vimgrep /theword/jg *.c
            :for d in getqflist()
            :   echo bufname(d.bufnr) ':' d.lnum '=' d.text
            :endfor

如果您只想要总数,请使用len(getqflist()).例如：

:echo len(getqflist())

如果你只想交互式地知道：cw将在窗口中打开列表,如果有任何错误(如果它已经打开并且没有错误就关闭它).该缓冲区中的行数是错误数.