How do I check the value of a Vim option in Vimscript?

Question

In Vimscript, how can I check the current value of a Vim option?

To elaborate, I want to make a command to switch from Full-GUI Mode ( guioptions=+tM) to Hacker Mode (guioptions=-tM).

However, I can't seem to find a way to parse the :set guioptions? value

Answer 1

You can use the &{option-name} in an if-statement like so:

if &guioptions ==# "Trl"
    echo "Toolbars and scrollbars are present!"
elseif &guioptions ==# ""
    echo "No toolbars and scrollbars present!"
endif

The & specifies that the variable name is a Vim option.

See :help :let-& for the full documentation.

Answer 2

Akshay solved it: Just posting the resulting function case other people might need / want it.

function! ToggleMenuBar()
    let l:menu_option = strridx(&guioptions, "m")
    let l:toolbar_option = strridx(&guioptions, "T")
    if l:menu_option > 0
        set guioptions-=m
    else
        set guioptions+=m
    endif
    if l:toolbar_option > 0
        set guioptions-=T
    else
        set guioptions+=T
    endif
endfunction