# Single-expression body.
for (var c = 0; c < 3;) {
  print(c = c + 1);
}
# expect: 1
# expect: 2
# expect: 3

# Block body.
for (var a = 0; a < 3; a = a + 1) {
  print(a);
}
# expect: 0
# expect: 1
# expect: 2

# No clauses.
fun foo() {
  for (;;) {
    return "done";
  }
}
print(foo()); # expect: done

# No variable.
var i = 0;
for (; i < 2; i = i + 1) {
  print(i);
}
# expect: 0
# expect: 1

# No condition.
fun bar() {
  for (var i = 0;; i = i + 1) {
    print(i);
    if (i >= 2) {
      return;
    }
  }
}
bar();
# expect: 0
# expect: 1
# expect: 2

# No increment.
for (var i = 0; i < 2;) {
  print(i);
  i = i + 1;
}
# expect: 0
# expect: 1

# Statement bodies.
for (; false;) {
  if (true) {
    1;
  }
  else {
    2;
  }
}
for (; false;) {
  while (true) {
    1;
  }
}
for (; false;) {
  for (;;) {
    1;
  }
}