/// <summary>
/// Emits code to load <see cref="PhpRuntimeChain"/> onto an evaluation stack. Supports operators chaining.
/// </summary>
/// <param name="codeGenerator"></param>
private PhpTypeCode EmitNodeReadUnknown(CodeGenerator codeGenerator)
{
ChainBuilder chain = codeGenerator.ChainBuilder;
PhpTypeCode result = PhpTypeCode.PhpRuntimeChain;
if (chain.IsArrayItem)
{
// 3: a_[x]_[x]
chain.Lengthen(); // for []
chain.EmitRTChainAddItem(this);
return(result);
}
// 1,2,4,5,6,7
if (chain.IsMember)
{
// 4, 5
if (this.isMemberOf != null)
{
// 5: ...->a[]->...
// Lengthen chain for isMemberOf
chain.Lengthen(); // for hop over ->
PhpTypeCode res = isMemberOf.Emit(codeGenerator);
if (res != PhpTypeCode.PhpRuntimeChain)
{
codeGenerator.EmitBoxing(res);
chain.EmitCreateRTChain();
}
// Lengthen chain for own []
chain.Lengthen();
chain.IsArrayItem = true;
chain.IsLastMember = false;
chain.EmitRTChainAddItem(this);
chain.IsArrayItem = false;
return(result);
}
// 4: a[x]->...
// Lengthen chain for itself
chain.Lengthen(); // for own []
chain.IsArrayItem = true;
chain.IsLastMember = true;
chain.EmitRTChainAddItem(this);
chain.IsArrayItem = false;
return(result);
}
// 1, 2, 6, 7
if (this.isMemberOf != null)
{
// 6 , 7: ...->a[]_[]_ , ...->a_[]_
bool quiet_read = chain.QuietRead;
chain.Create();
chain.Begin();
chain.QuietRead = quiet_read;
chain.Lengthen(); // for hop over ->
PhpTypeCode res = isMemberOf.Emit(codeGenerator);
if (res != PhpTypeCode.PhpRuntimeChain)
{
codeGenerator.EmitBoxing(res);
chain.EmitCreateRTChain();
}
chain.IsArrayItem = true;
chain.IsLastMember = false;
chain.EmitRTChainAddItem(this);
chain.IsArrayItem = false;
chain.End();
return(result);
}
// 1, 2
if (array is ItemUse || array is DirectStFldUse || array is IndirectStFldUse /* ??? */)
{
// 2: a[]_[]_
bool quiet_read = chain.QuietRead;
chain.Create();
chain.Begin();
chain.QuietRead = quiet_read;
chain.IsArrayItem = true;
chain.IsLastMember = true;
chain.EmitRTChainAddItem(this);
chain.IsArrayItem = false;
chain.End();
return(result);
}
// 1: a_[x]_
chain.IsArrayItem = true;
chain.IsLastMember = true;
chain.EmitRTChainAddItem(this);
chain.IsArrayItem = false;
return(result);
}