/// <summary>
/// Rewrites a unary expression.
/// </summary>
/// <param name="node">The unary expression to rewrite.</param>
/// <returns>The rewritten unary expression.</returns>
protected virtual BoundExpression RewriteUnaryExpression(BoundUnaryExpression node)
{
var operand = RewriteExpression(node.Operand);
if (operand == node.Operand)
{
return(node);
}
return(new BoundUnaryExpression(node.Op, operand));
}