Lib.quadruple_of_list

quadruple_of_list : 'a list -> 'a * 'a * 'a * 'a

STRUCTURE: Lib
SYNOPSIS: Turns a four-element list into a quadruple.
DESCRIPTION: quadruple_of_list [x1, x2, x3, x4] returns (x1, x2, x3, x4).
FAILURE: Fails if applied to a list that is not of length 4.
SEEALSO: singleton_of_list, pair_of_list, triple_of_list

HOL Kananaskis-14