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default Order dec
$include <prelude.sail>
/* It's hard to test that this optimization does the right thing, but
we can at least test that it doesn't do the wrong thing. */
$optimize unroll 20
val fac : forall 'n, 'n >= 0. int('n) -> int
function fac(n) = {
if n == 0 then {
1
} else {
n * fac(n - 1)
}
}
$optimize unroll 2
val fac2 : forall 'n, 'n >= 0. int('n) -> int
function fac2(n) = {
if n == 0 then {
1
} else {
n * fac2(n - 1)
}
}
val "print_int" : (string, int) -> unit
function main((): unit) -> unit = {
print_int("fac(4) = ", fac(4));
print_int("fac(5) = ", fac(5));
print_int("fac(6) = ", fac(6));
print_int("fac2(4) = ", fac2(4));
print_int("fac2(5) = ", fac2(5));
print_int("fac2(6) = ", fac2(6))
}
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