fish-shell/share/functions/__fish_prev_arg_in.fish

# returns 0 only if previous argument is one of the supplied arguments
function __fish_prev_arg_in
	set -l tokens (commandline -co)
	set -l tokenCount (count $tokens)
	if test $tokenCount -lt 2
		# need at least cmd and prev argument
		return 1
	end
	for arg in $argv
		if string match -q -- $tokens[-1] $arg
			return 0
		end
	end

	return 1
end
New helper functions `__fish_is_first_arg` and `__fish_prev_arg_in` For usage in completion scripts. Unlike `__fish_is_first_token` (which is probably not correctly named), `__fish_is_first_arg` returns true regardless of whether existing tokens start with `-` or not, to be used when an arg cannot be used with any other argument. `__fish_prev_arg_in` is similar to `__fish_seen_...` but it explicitly tests the preceding token only, for arguments that take only a single parameter. 2018-05-06 23:46:56 +00:00			`# returns 0 only if previous argument is one of the supplied arguments`
			`function __fish_prev_arg_in`
			`set -l tokens (commandline -co)`
			`set -l tokenCount (count $tokens)`
			`if test $tokenCount -lt 2`
			`# need at least cmd and prev argument`
			`return 1`
			`end`
			`for arg in $argv`
			`if string match -q -- $tokens[-1] $arg`
			`return 0`
			`end`
			`end`

			`return 1`
			`end`