File bindings/s2/unit/010-050-incrdecr.s2 artifact df819d5f21 part of check-in 473fd8718c

if(1) {
  var a = 1;
  assert 1 === a++;
  assert 2 === a;
  assert 3 === ++a;
  assert 'CWAL_SCR_SYNTAX' === catch{++a = a}.codeString() /*invalid target for assignment*/;
  assert 3 === a /* b/c the exception is thrown before ++a happened */;
  assert 'CWAL_RC_NOT_FOUND' === catch{++unknownSymbol}.codeString() /*unknown symbol*/;
  assert 3 === (a = a++);
  assert 3 === a;
  assert 3 === a--;
  assert 2 === a;
  assert 1 === --a;
  assert 6 === --a + 2 * 3;
  assert 0 === a;
}

if(1) {
  var o = {a:1};
  var a = 1;
  assert 1 === o.a++;
  assert 2 === o.a;
  assert 3 === ++o.a;
  assert 'CWAL_SCR_SYNTAX' === catch{++o.a = o.a}.codeString() /*invalid target for assignment*/;
  assert 3 === o.a /* b/c the exception is thrown before ++o.a happened */;
  assert 3 === (o.a = o.a++);
  assert 3 === o.a;
  assert 3 === o.a--;
  assert 2 === o.a;
  assert 1 === --o['a'];
  assert 6 === --o.a + 2 * 3;
  assert 0 === o.a;
}

if(1){
    // Make sure incr/decr do not demote doubles to integers. (They used to.)
    var a = 0.0;
    assert 1.0 === ++a;
    assert 0.0 === --a;

    assert 0.0 === a++;
    assert 1.0 === a++;
    assert 2.0 === a;

    var o = {a:0.0};
    assert 1.0 === ++o.a;
    assert 0.0 === --o.a;
    assert 0.0 === o.a++;
    assert 1.0 === o.a++;
    assert 2.0 === o.a;

    // Make sure booleans are coerced to integers...
    a = false;
    assert 1 === ++a;
    a = true;
    assert true === a++ /* Interesting... but is it wrong? */;
    assert 2 === a;

    assert 1 === +true;
    assert 0 === +false;
    assert -1 === -true;
    assert 0 === -false;

}