/// <summary>
/// Generates System.CodeDom.CodeExpression from the given expression.
/// </summary>
/// <param name="expression">Expression from which System.CodeDom.CodeExpression is generated.</param>
/// <returns>Generated System.CodeDom.CodeExpression.</returns>
public virtual CodeExpression Visit(LinqCastExpression expression)
{
CodeExpression source = this.GenerateCode(expression.Source);
CodeTypeReference type = this.GetTypeReference(expression.TypeToOperateAgainst);
return(source.Call("Cast", new CodeTypeReference[] { type }));
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(LinqCastExpression expression)
{
var argument = this.ReplaceExpression(expression.Source);
if (this.HasChanged(expression.Source, argument))
{
return(argument.CastEnumerable(expression.TypeToOperateAgainst));
}
return(expression);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the LinqCastExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public virtual string Visit(LinqCastExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public virtual QueryValue Visit(LinqCastExpression expression)
{
var source = this.EvaluateCollection(expression.Source);
return(source.Cast(expression.TypeToOperateAgainst));
}
/// <summary>
/// Resolves types for the specified expression.
/// </summary>
/// <param name="expression">The expression to resolve types for.</param>
/// <returns>Expression with resolved types.</returns>
public QueryExpression Visit(LinqCastExpression expression)
{
var source = this.ResolveTypes(expression.Source);
return(source.CastEnumerable(expression.TypeToOperateAgainst));
}