public static IntExpression Create(IntExpression lhs, IntExpression rhs, bool shiftLeft)
{
int lhsValue, rhsValue;
if(lhs.TryGetConstant(out lhsValue) && rhs.TryGetConstant(out rhsValue)) {
return shiftLeft ? lhsValue<<rhsValue : lhsValue>>rhsValue;
}
return new Shift(lhs, rhs, shiftLeft);
}
public static IntExpression Create(IntExpression lhs, IntExpression rhs, bool shiftLeft)
{
int lhsValue, rhsValue;
if (lhs.TryGetConstant(out lhsValue) && rhs.TryGetConstant(out rhsValue))
{
return(shiftLeft ? lhsValue << rhsValue : lhsValue >> rhsValue);
}
return(new Shift(lhs, rhs, shiftLeft));
}
public static IntExpression Create(IntExpression expr)
{
int value;
if(expr.TryGetConstant(out value)) {
return new IntConstant(-value);
}
var alreadyNegatedExpression=expr as UnaryMinus;
return ReferenceEquals(alreadyNegatedExpression, null)
? new UnaryMinus(expr)
: alreadyNegatedExpression.expr;
}
public static IntExpression Create(IntExpression expr)
{
int value;
if (expr.TryGetConstant(out value))
{
return(new IntConstant(-value));
}
var alreadyNegatedExpression = expr as UnaryMinus;
return(ReferenceEquals(alreadyNegatedExpression, null)
? new UnaryMinus(expr)
: alreadyNegatedExpression.expr);
}