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method M()
{
var numbers := set i | 0 <= i && i < 100;
var squares := set i | 0 <= i && i < 100 :: Id(i)*i; // verifying properties about set comprehensions with a term expression is hard
assert 12 in numbers;
assert Id(5) == 5;
assert 25 in squares;
assert 200 in numbers; // error
}
function method Id(x: int): int { x } // for triggering
// The following mainly test that set comprehensions can be compiled, but one would
// have to run the resulting program to check that the compiler is doing the right thing.
method Main()
{
var q := set i,j | 0 <= i && i < 10 && 0 <= j && j < 3 :: i+j;
call PrintSet(q);
q := set b: bool | true :: if b then 3 else 7;
call PrintSet(q);
var m := set k | k in q :: 2*k;
call PrintSet(m);
call PrintSet(set k | k in q && k % 2 == 0);
var sq := [30, 40, 20];
call PrintSet(set k, i | k in sq && 0 <= i && i < k && i % 7 == 0 :: k + i);
var bb := forall k, i | k in sq && 0 <= i && i < k && i % 7 == 0 :: k + i == 17;
}
method PrintSet<T>(s: set<T>) {
var q := s;
while (q != {})
decreases q;
{
var x := choose q;
print x, " ";
q := q - {x};
}
print "\n";
}
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