/// <summary>
/// Extends this chain with a <see cref="RuntimeChainElement"/>.
/// </summary>
/// <param name="element">The element.</param>
public void Add(RuntimeChainElement element)
{
if (lastElement != null)
{
lastElement.Next = element;
lastElement = element;
}
else
{
Chain = lastElement = element;
}
}
/// <summary>
/// Evaluates this chain as if it had the <see cref="PHP.Core.AST.AccessType.ReadRef"/> access type.
/// </summary>
/// <param name="context">Current script context.</param>
/// <returns>The result of chain evaluation.</returns>
public PhpReference GetReference(ScriptContext context)
{
PhpReference reference;
RuntimeChainElement element = Chain;
if (element == null)
{
// if we are just wrapping the variable with a PhpReference, make a copy
reference = Variable as PhpReference;
if (reference == null)
{
reference = new PhpReference(PhpVariable.Copy(Variable, CopyReason.Unknown));
}
return(reference);
}
// make sure that we have a PhpReference
reference = PhpVariable.MakeReference(Variable);
if (element == lastElement)
{
// GetPropertyRef/GetItemRef
return(element.GetRef(ref reference.value, context, Caller));
}
// EnsureVariableIsObject/EnsureVariableIsArray
object var = element.EnsureVariable(ref reference.value, context, Caller);
if (var == null)
{
return(new PhpReference());
}
while (element.Next != null)
{
// Ensure{Field,Item}Is{Object,Array}
var = element.Ensure(var, context, Caller);
if (var == null)
{
return(new PhpReference());
}
element = element.Next;
}
// GetObjectPropertyRef/GetArrayItemRef
return(element.GetEnsuredRef(var, context, Caller));
}
/// <summary>
/// Evaluates this chain as if it had the <see cref="PHP.Core.AST.AccessType.Read"/> access type.
/// </summary>
/// <param name="context">Current script context.</param>
/// <returns>The result of chain evaluation.</returns>
public object GetValue(ScriptContext context)
{
// dereference the PhpReference
object var = PhpVariable.Dereference(Variable);
RuntimeChainElement element = Chain;
while (element != null)
{
// GetProperty/GetItem
var = element.Get(var, context, Caller);
element = element.Next;
}
return(var);
}
/// <summary>
/// Extends this chain with a <see cref="RuntimeChainElement"/>.
/// </summary>
/// <param name="element">The element.</param>
public void Add(RuntimeChainElement element)
{
if (lastElement != null)
{
lastElement.Next = element;
lastElement = element;
}
else Chain = lastElement = element;
}