internal override Expression VisitBinary(BinaryExpression b)
{
if (b.NodeType == ExpressionType.AndAlso) // Boolean And with short-circuit
{
VisitCombination(b, (qh) => { /* noop -- AND is the default combinator */ });
}
else if (b.NodeType == ExpressionType.OrElse) // Boolean Or with short-circuit
{
VisitCombination(b, qh => NativeQuery.or(qh));
}
else
{
var leftMember = b.Left as MemberExpression;
if (leftMember == null)
{
throw new NotSupportedException(
$"The lhs of the binary operator '{b.NodeType}' should be a member expression");
}
var leftName = leftMember.Member.Name;
var rightValue = ExtractConstantValue(b.Right);
if (rightValue == null)
{
throw new NotSupportedException($"The rhs of the binary operator '{b.NodeType}' should be a constant or closure variable expression");
}
switch (b.NodeType)
{
case ExpressionType.Equal:
AddQueryEqual(_coreQueryHandle, leftName, rightValue);
break;
case ExpressionType.NotEqual:
AddQueryNotEqual(_coreQueryHandle, leftName, rightValue);
break;
case ExpressionType.LessThan:
AddQueryLessThan(_coreQueryHandle, leftName, rightValue);
break;
case ExpressionType.LessThanOrEqual:
AddQueryLessThanOrEqual(_coreQueryHandle, leftName, rightValue);
break;
case ExpressionType.GreaterThan:
AddQueryGreaterThan(_coreQueryHandle, leftName, rightValue);
break;
case ExpressionType.GreaterThanOrEqual:
AddQueryGreaterThanOrEqual(_coreQueryHandle, leftName, rightValue);
break;
default:
throw new NotSupportedException(string.Format("The binary operator '{0}' is not supported", b.NodeType));
}
}
return(b);
}
