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can : ('a -> 'b) -> 'a -> bool
SYNOPSIS
Tests for failure.
DESCRIPTION
can f x evaluates to true if the application of f to x succeeds.
It evaluates to false if the application fails with a Failure _ exception.
FAILURE CONDITIONS
Never fails.
EXAMPLE
# can hd [1;2];;
val it : bool = true
# can hd [];;
val it : bool = false