/// <summary>
/// Creates a textual representation of the LambdaAbstraction with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="arguments">Argument query expressions.</param>
/// <returns>Representation of the original query expression.</returns>
protected override string MakeLambdaAbstraction(LambdaAbstraction node, ReadOnlyCollection <string> arguments)
{
if (node.Parameters.Count == 0)
{
return(string.Format(CultureInfo.InvariantCulture, "@LambdaAbstraction({0})", node.Body.ToString()));
}
return(string.Format(CultureInfo.InvariantCulture, "@LambdaAbstraction({0}, {1})", node.Body.ToString(), string.Join(", ", arguments)));
}
/// <summary>
/// Visits a <see cref="LambdaAbstraction" /> node.
/// </summary>
/// <param name="node">Node to visit.</param>
/// <returns>Result of visiting the node.</returns>
protected internal override QueryTree VisitLambdaAbstraction(LambdaAbstraction node)
{
var body = VisitLambdaAbstractionBody(node.Body);
var args = Visit(node.Parameters);
if (body != node.Body || args != node.Parameters)
{
return(MakeLambdaAbstraction(node, body, args));
}
return(node);
}
/// <summary>
/// Visits a <see cref="LambdaAbstraction" /> node.
/// </summary>
/// <param name="node">Node to visit.</param>
/// <returns>Result of visiting the node.</returns>
protected internal override QueryTree VisitLambdaAbstraction(LambdaAbstraction node)
{
// This is overridden so we can use the nongeneric Visit function on ReadOnlyCollection which
// will perform an element-wise equality check to see if the collection has changed
var args = Visit(node.Parameters);
if (args != node.Parameters)
{
return(MakeLambdaAbstraction(node, args));
}
return(node);
}
/// <summary>
/// Makes a <see cref="LambdaAbstraction" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="arguments">Argument query expressions.</param>
/// <returns>Representation of the original query expression.</returns>
protected sealed override QueryTree MakeLambdaAbstraction(LambdaAbstraction node, ReadOnlyCollection <QueryTree> arguments)
{
return(DefaultQueryExpressionFactory.Instance.LambdaAbstraction(node.Body, arguments));
}
/// <summary>
/// Makes a <see cref="LambdaAbstraction" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="body">Body expression.</param>
/// <param name="arguments">Argument query expressions.</param>
/// <returns>Representation of the original query expression.</returns>
protected virtual QueryTree MakeLambdaAbstraction(LambdaAbstraction node, LambdaExpression body, ReadOnlyCollection <QueryTree> arguments)
{
return(DefaultQueryExpressionFactory.Instance.LambdaAbstraction(body, arguments));
}
