private PhpTypeCode EmitNodeWrite(CodeGenerator codeGenerator)
{
ChainBuilder chain = codeGenerator.ChainBuilder;
if (chain.IsMember)
{
// 1,4,5,6,9
if (this.isMemberOf != null)
{
// 1: ...->a->...
chain.Lengthen();
chain.EmitEnsureProperty(isMemberOf, this, false);
return(PhpTypeCode.DObject);
}
if (chain.IsArrayItem)
{
// 4,6
if (chain.IsLastMember)
{
// 4: a[][]
chain.EmitEnsureVariableIsArray(this);
}
else
{
// 6: $b->a[3]
ChainBuilder.ObjectFieldLazyEmitInfo object_info = chain.GetObjectForLazyEmit();
// Lengthen for hop over ->
chain.EmitEnsureProperty(object_info.ObjectForLazyEmit, this, true);
chain.ReleaseObjectForLazyEmit(object_info);
chain.IsArrayItem = true;
chain.IsLastMember = false;
}
return(PhpTypeCode.PhpArray);
}
if (chain.Exists)
{
// 5: $a->b->c->...
chain.EmitEnsureVariableIsObject(this);
return(PhpTypeCode.DObject);
}
else
{
// 9: $a->b
this.EmitLoadAddress(codeGenerator);
return(PhpTypeCode.ObjectAddress);
}
}
// 2,3,7,8
if (this.isMemberOf != null)
{
// 2: $b->a
// 8: b[]->a
chain.Create();
chain.Begin();
assignmentCallback = EmitWriteField(codeGenerator, false);
// Note: more work is done in EmitAssign
// some data are preloaded but nothing that can be consumed is loaded on stack:
return(PhpTypeCode.Unknown);
}
// 3,7
if (codeGenerator.ChainBuilder.IsArrayItem)
{
// 3: a[3]
EmitLoadAddress(codeGenerator);
return(PhpTypeCode.ObjectAddress);
}
else
{
// 7: $a
EmitStorePrepare(codeGenerator);
return(PhpTypeCode.Unknown);
}
}
private PhpTypeCode EmitNodeWrite(IndirectVarUse node, CodeGenerator codeGenerator)
{
ChainBuilder chain = codeGenerator.ChainBuilder;
if (chain.IsMember)
{
// 1,4,5,6,9
if (node.IsMemberOf != null)
{
// 1: ...->$a->...
chain.Lengthen();
chain.EmitEnsureProperty(node.IsMemberOf, node, false);
return(PhpTypeCode.DObject);
}
if (chain.IsArrayItem)
{
// 4,6
if (chain.IsLastMember)
{
// 4: ${"a"}[][]
chain.EmitEnsureVariableIsArray(node);
return(PhpTypeCode.PhpArray);
}
else
{
// 6: $b->${"a"}[3]
ChainBuilder.ObjectFieldLazyEmitInfo object_info = chain.GetObjectForLazyEmit();
// Lengthen for hop over ->
chain.EmitEnsureProperty(object_info.ObjectForLazyEmit, node, true);
chain.ReleaseObjectForLazyEmit(object_info);
chain.IsArrayItem = true;
chain.IsLastMember = false;
return(PhpTypeCode.PhpArray);
}
}
if (chain.Exists)
{
// 5: $$a->b->c->...
chain.EmitEnsureVariableIsObject(node);
return(PhpTypeCode.DObject);
}
else
{
// 9: $$a->b
this.EmitLoadAddress(node, codeGenerator);
return(PhpTypeCode.ObjectAddress);
}
}
// 2,3,7,8
if (node.IsMemberOf != null)
{
// 2: $b->a
// 8: b[]->a
chain.Create();
chain.Begin();
assignmentCallback = EmitWriteField(node, codeGenerator, false);
// Note: more work is done in EmitAssign
return(PhpTypeCode.Unknown);
}
// 3,7
if (codeGenerator.ChainBuilder.IsArrayItem)
{
// 3: ${"a"}[3]
this.EmitLoadAddress(node, codeGenerator);
return(PhpTypeCode.ObjectAddress);
}
// 7: $a
//codeGenerator.EmitVariableStorePrepare(this);
this.EmitStorePrepare(node, codeGenerator);
return(PhpTypeCode.Unknown);
}