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- made all iterator classes natively abstract so that they do not get a ConstructNative method so that OP_NEW can refuse creating them without the need to mark them as abstract.

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- block creation of actors with the 'new' instruction. Unlike the above these cannot be made abstract because without ConstructNative they cannot be serialized.
This commit is contained in:
Christoph Oelckers 2017-03-09 17:21:37 +01:00
parent 20c56f6dda
commit 878e6015df
4 changed files with 18 additions and 5 deletions
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1
src/dobjtype.cpp
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@ -3084,6 +3084,7 @@ DObject *PClass::CreateNew()
if (ConstructNative == nullptr)
{
M_Free(mem);
I_Error("Attempt to instantiate abstract class %s.", TypeName.GetChars());
}
ConstructNative (mem);

4
src/dthinker.cpp
View file

@ -709,7 +709,7 @@ DThinker *FThinkerIterator::Next (bool exact)
class DThinkerIterator : public DObject, public FThinkerIterator
{
DECLARE_CLASS(DThinkerIterator, DObject)
DECLARE_ABSTRACT_CLASS(DThinkerIterator, DObject)
DThinkerIterator()
{
@ -722,7 +722,7 @@ public:
}
};
IMPLEMENT_CLASS(DThinkerIterator, false, false);
IMPLEMENT_CLASS(DThinkerIterator, true, false);
DEFINE_ACTION_FUNCTION(DThinkerIterator, Create)
{
PARAM_PROLOGUE;

4
src/p_mobj.cpp
View file

@ -7866,7 +7866,7 @@ DEFINE_ACTION_FUNCTION(AActor, GetBobOffset)
class DActorIterator : public DObject, public NActorIterator
{
DECLARE_CLASS(DActorIterator, DObject)
DECLARE_ABSTRACT_CLASS(DActorIterator, DObject)
public:
DActorIterator(PClassActor *cls= nullptr, int tid = 0)
@ -7875,7 +7875,7 @@ public:
}
};
IMPLEMENT_CLASS(DActorIterator, false, false);
IMPLEMENT_CLASS(DActorIterator, true, false);
DEFINE_ACTION_FUNCTION(DActorIterator, Create)
{
PARAM_PROLOGUE;

14
src/scripting/vm/vmexec.h
View file

@ -811,7 +811,19 @@ begin:
{
b = B;
PClass *cls = (PClass*)(pc->op == OP_NEW ? reg.a[b] : konsta[b].v);
if (cls->ObjectFlags & OF_Abstract) ThrowAbortException(X_OTHER, "Cannot instantiate abstract class %s", cls->TypeName.GetChars());
if (cls->ConstructNative == nullptr)
{
ThrowAbortException(X_OTHER, "Class %s requires native construction", cls->TypeName.GetChars());
}
if (cls->ObjectFlags & OF_Abstract)
{
ThrowAbortException(X_OTHER, "Cannot instantiate abstract class %s", cls->TypeName.GetChars());
}
// Creating actors here must be outright prohibited,
if (cls->IsDescendantOf(RUNTIME_CLASS(AActor)))
{
ThrowAbortException(X_OTHER, "Cannot create actors with 'new'");
}
// [ZZ] validate readonly and between scope construction
c = C;
if (c) FScopeBarrier::ValidateNew(cls, c - 1);