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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | \DOC exists
\TYPE {exists : ((* -> bool) -> * list -> bool)}
\SYNOPSIS
Tests a list to see if it has at least one element satisfying a predicate.
\KEYWORDS
list.
\DESCRIBE
{exists p l} applies {p} to the elements of {l} in order until one is found
which satisfies {p}, or until the list is exhausted, returning {true} or
{false} accordingly.
\FAILURE
Never fails.
\SEEALSO
forall, find, tryfind, mem, assoc, rev_assoc.
\ENDDOC
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