protected DeclarationCommand UpdateDeclaration(DeclarationCommand decl, IEnumerable<VariableDeclaration> variables, SelectExpression source)
{
if (variables != decl.Variables || source != decl.Source)
{
return new DeclarationCommand(variables, source);
}
return decl;
}
protected virtual Expression VisitDeclaration(DeclarationCommand decl)
{
var variables = this.VisitVariableDeclarations(decl.Variables);
var source = (SelectExpression)this.Visit(decl.Source);
return this.UpdateDeclaration(decl, variables, source);
}
protected override Expression VisitDeclaration(DeclarationCommand decl)
{
throw new NotSupportedException();
}
