public override Node Visit(ConstantOp op, Node n)
{
PlanCompiler.Assert(n.Children.Count == 0, "Constant operations don't have children.");
PlanCompiler.Assert(op.Value != null, "Value must not be null");
// No need to visit children as none are expected
if (md.TypeSemantics.IsEnumerationType(op.Type))
{
// For enums the value can be specified either as enum (e.g. Color.Yellow) or as a number.
// We need the numeric value only so if it was not specified as a number we need to cast it to the
// underlying enum type.
var constValue = op.Value.GetType().IsEnum
? Convert.ChangeType(
op.Value, op.Value.GetType().GetEnumUnderlyingType(), CultureInfo.InvariantCulture)
: op.Value;
return m_command.CreateNode(
m_command.CreateConstantOp(
TypeHelpers.CreateEnumUnderlyingTypeUsage(op.Type), constValue));
}
if (md.TypeSemantics.IsStrongSpatialType(op.Type))
{
op.Type = TypeHelpers.CreateSpatialUnionTypeUsage(op.Type);
}
// ConstantOp has no children so there is nothing to visit - just return the original node.
return n;
}
/// <summary>
/// Visitor pattern method for ConstantOp
/// </summary>
/// <param name="op"> The ConstantOp being visited </param>
/// <param name="n"> The Node that references the Op </param>
public virtual void Visit(ConstantOp op, Node n)
{
VisitConstantOp(op, n);
}
/// <summary>
/// Copies a ConstantOp
/// </summary>
/// <param name="op">The Op to Copy</param>
/// <param name="n">The Node that references the Op</param>
/// <returns>A copy of the original Node that references a copy of the original Op</returns>
public override Node Visit(ConstantOp op, Node n)
{
ConstantBaseOp newOp = m_destCmd.CreateConstantOp(op.Type, op.Value);
return(m_destCmd.CreateNode(newOp));
}
// <summary>
// Copies a ConstantOp
// </summary>
// <param name="op"> The Op to Copy </param>
// <param name="n"> The Node that references the Op </param>
// <returns> A copy of the original Node that references a copy of the original Op </returns>
public override Node Visit(ConstantOp op, Node n)
{
var newOp = m_destCmd.CreateConstantOp(op.Type, op.Value);
return m_destCmd.CreateNode(newOp);
}
