flag

Usage

flag c
flag(c, s)
flag? c
flag?(c, s)

Signatures

flag:	Character $\to$ List String
flag:	(Character,String)$\to$List String
flag?:	Character $\to$ Boolean
flag?:	(Character, String) $\to$ Boolean

Parameter	Type	Description
c	Character	flag code to look for
s	String	special flag codes (optional)

Returns

flag(c) returns all the values of the flag c each time it is present in the command line, an empty list otherwise.
flag?(c) returns true if the flag c is present in the command line, false otherwise.
In both functions, the optional argument s contains a list of flag codes which cause the rest of the argument to be skipped.

Example

If the command line to the program was myprog -lsalli -l gmp -v, then flag?(char "a") and flag?(char "v") both return true, while flag?(char "b") and flag?(char "a", "l") both return false. In addition, flag(char "l") returns the list [``salli'', ``gmp''].