public virtual ISqlNode VisitPrefixOperation(SqlPrefixOperationNode n)
{
var op = Visit(n.Operator) as SqlOperatorNode;
var right = Visit(n.Right);
return(n.Update(op, right));
}
public void Optimize_PositiveNumber()
{
var ast = new SqlPrefixOperationNode
{
Operator = new SqlOperatorNode("+"),
Right = new SqlNumberNode(5)
};
var target = new ExpressionOptimizeVisitor();
var result = target.Visit(ast);
result.Should().MatchAst(new SqlNumberNode(5));
}
public ISqlNode VisitPrefixOperation(SqlPrefixOperationNode n)
{
Append(n.Operator, " ");
if (n.Right is SqlInfixOperationNode)
{
Append("(", n.Right, ")");
}
else
{
Visit(n.Right);
}
return(n);
}
public override ISqlNode VisitPrefixOperation(SqlPrefixOperationNode n)
{
// First make sure we visit the children nodes and reduce those as much as possible
n = base.VisitPrefixOperation(n) as SqlPrefixOperationNode;
if (n.Right is SqlNumberNode number)
{
if (n.Operator.Operator == "-")
{
return(number.MakeNegative());
}
if (n.Operator.Operator == "+")
{
return(n.Right);
}
if (n.Operator.Operator == "~")
{
return(number.BitwiseInvert());
}
}
return(n);
}
public override ISqlNode VisitPrefixOperation(SqlPrefixOperationNode n)
{
ConfirmExpressionOperands(n.Right);
return(base.VisitPrefixOperation(n));
}
public override ISqlNode VisitPrefixOperation(SqlPrefixOperationNode n)
{
_result.AssertNotNull(n, nameof(n.Operator), n.Operator);
_result.AssertNotNull(n, nameof(n.Right), n.Right);
return(base.VisitPrefixOperation(n));
}
