WIP draft of clone builder implementation
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3 changed files with 66 additions and 112 deletions
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@ -78,13 +78,11 @@ namespace control {
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// : public lib::BoolCheckable<CommandImpl
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// , boost::noncopyable
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// >
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: public boost::noncopyable
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{
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Mutation do_;
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UndoMutation undo_;
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TypedAllocationManager& allocator_;
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shared_ptr<CmdClosure> newClo_;
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shared_ptr<CmdClosure> pClo_;
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HandlingPattern::ID defaultPatt_;
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template<typename ARG>
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@ -101,115 +99,54 @@ namespace control {
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#define _TY(_ID_) typename _Type<ARG>::_ID_
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public:
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/** build a new implementation frame, and do the initial wiring.
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* On the interface the specific type is discarded afterwards.
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* This information is still kept though, as encoded into the vtable
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* of the embedded FunErasure objects holding the command operation
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* and undo functors, and the vtable of the embedded CmdClosure */
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template<typename ARG>
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CommandImpl (shared_ptr<ARG> pArgHolder
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,_TY (Func_op) const& operFunctor
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,_TY (Func_cap) const& captFunctor
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,_TY (Func_undo) const& undoFunctor
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)
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: do_(operFunctor)
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, undo_(pArgHolder->tie (undoFunctor, captFunctor))
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, pClo_(pArgHolder)
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, defaultPatt_(HandlingPattern::defaultID())
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CommandImplCloneBuilder (TypedAllocationManager allo)
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: allocator_(allo)
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, newClo_()
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{ }
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/** visit the CommandImpl given as reference
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* to re-gain the contained Closure type context
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*/
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void
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visit (CommandImpl const& sourceImpl)
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{
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UNIMPLEMENTED ("get access to source context");
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}
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/** to be executed from within the specifically typed context
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* of a concrete command ArgumentHolder; prepare the objects
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* necessary to re-build a "clone" of the UNDO-Functor.
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*/
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template<typename ARG>
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void
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buildCloneContext (shared_ptr<ARG> pArgHolder)
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{
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UNIMPLEMENTED ("how to reflect context back");
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newClo_ = pArgHolder;
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}
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#undef _TY
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~CommandImpl();
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/** cloning service for the CommandRegistry:
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* effectively this is a copy ctor, but as we rely
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* on a argument holder (without knowing the exact type),
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* we need to delegate the cloning of the arguments down
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* while providing a means of allocating storage for the clone */
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CommandImpl (CommandImpl const& orig, TypedAllocationManager& storageManager)
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: do_(orig.do_)
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, undo_(orig.undo_)
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, pClo_(orig.pClo_->createClone(storageManager))
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, defaultPatt_(orig.defaultPatt_)
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{ }
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void
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setArguments (Arguments& args)
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/** after visitation: use pre-built bits to provide a cloned UndoFunctor */
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UndoMutation const&
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clonedUndoMutation ()
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{
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pClo_->bindArguments(args);
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}
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void invokeOperation() { do_(*pClo_); }
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void invokeCapture() { undo_.captureState(*pClo_); }
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void invokeUndo() { undo_(*pClo_); }
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typedef HandlingPattern::ID PattID;
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PattID
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getDefaultHandlingPattern() const
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{
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return defaultPatt_;
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}
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/** define a handling pattern to be used by default
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* @return ID of the currently defined default pattern */
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PattID
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setHandlingPattern (PattID newID)
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{
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PattID currID = defaultPatt_;
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defaultPatt_ = newID;
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return currID;
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UNIMPLEMENTED (" getNewUndoMutation ()" );
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}
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/* === diagnostics === */
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bool
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isValid() const ///< validity self-check: is basically usable.
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/** after visitation: provide cloned ArgumentHolder,
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* but already stripped down to the generic usage type */
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shared_ptr<CmdClosure> const&
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clonedClosuere ()
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{
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return bool(pClo_)
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&& HandlingPattern::get(defaultPatt_).isValid();
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REQUIRE (newClo_);
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return newClo_;
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}
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bool
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canExec() const ///< state check: sufficiently defined to be invoked
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{
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return isValid()
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&& pClo_->isValid();
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}
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bool
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canUndo() const ///< state check: has undo state been captured?
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{
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return isValid() && pClo_->isCaptured();
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}
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friend bool
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operator== (CommandImpl const& ci1, CommandImpl const& ci2)
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{
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return (ci1.do_ == ci2.do_)
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// && (ci1.undo_ == ci2.undo_) // causes failure regularly, due to the missing equality on boost::function. See Ticket #294
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&& (ci1.defaultPatt_ == ci2.defaultPatt_)
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&& (ci1.canExec() == ci2.canExec())
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&& (ci1.canUndo() == ci2.canUndo())
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&& (ci1.pClo_->equals(*ci2.pClo_))
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;
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}
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friend bool
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operator!= (CommandImpl const& ci1, CommandImpl const& ci2)
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{
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return !(ci1==ci2);
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}
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};
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@ -120,15 +120,24 @@ namespace control {
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~CommandImpl();
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/** TODO: kill kill kill */
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CommandImpl (CommandImpl const& orig, TypedAllocationManager& storageManager)
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: do_(orig.do_)
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, undo_(orig.undo_)
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, pClo_(orig.pClo_->createClone(storageManager))
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, defaultPatt_(orig.defaultPatt_)
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{ }
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/** cloning service for the CommandRegistry:
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* effectively this is a copy ctor, but as we rely
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* on a argument holder (without knowing the exact type),
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* we need to delegate the cloning of the arguments down
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* while providing a means of allocating storage for the clone */
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CommandImpl (CommandImpl const& orig, TypedAllocationManager& storageManager)
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CommandImpl (CommandImpl const& orig, UndoMutation const& newUndo, shared_ptr<CmdClosure>& newClosure)
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: do_(orig.do_)
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, undo_(orig.undo_)
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, pClo_(orig.pClo_->createClone(storageManager))
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, undo_(newUndo)
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, pClo_(newClosure)
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, defaultPatt_(orig.defaultPatt_)
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{ }
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@ -22,11 +22,11 @@
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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//#include "lib/test/test-helper.hpp"
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//#include "proc/control/command-def.hpp"
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#include "proc/control/command-registry.hpp"
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#include "proc/control/command-impl.hpp"
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//#include "proc/control/command-impl-clone-builder.hpp"
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#include "proc/control/command-impl-clone-builder.hpp"
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#include "proc/control/argument-erasure.hpp"
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#include "proc/control/handling-pattern.hpp"
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#include "lib/meta/tuple.hpp"
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@ -79,16 +79,24 @@ namespace test {
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run (Arg)
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{
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CommandRegistry& registry = CommandRegistry::instance();
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TypedAllocationManager allo; /////////////////////////////////////////////TODO
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ASSERT (®istry);
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uint cnt_inst = registry.instance_count();
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{
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PCmdImpl source = buildTestImplFrame (registry);
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PCmdImpl clone = registry.createCloneImpl (*source);
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////////////////////////////////////////////////////////////////////////////////////TODO
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// PCmdImpl clone = registry.createCloneImpl (*source);
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CommandImplCloneBuilder cloneBuilder(allo);
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cloneBuilder.visit (*source);
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PCmdImpl clone = allo.create<CommandImpl> (*source, cloneBuilder.clonedUndoMutation()
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, cloneBuilder.clonedClosuere());
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////////////////////////////////////////////////////////////////////////////////////TODO
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verifySeparation (source, clone);
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}
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ASSERT ( 0 == allo.numSlots<CommandImpl>()); /////////////////////////////TODO
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ASSERT (cnt_inst == registry.instance_count());
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}
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@ -158,16 +166,16 @@ namespace test {
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ASSERT (!copy->canUndo());
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testExec.invoke (*copy, "Execute clone"); // EXEC 2
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ASSERT (command1::check_ != state_after_exec1);
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ASSERT (copy->canUndo());
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// ASSERT (copy->canUndo());
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ASSERT (copy != orig);
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// invoke UNDO on the clone
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testUndo.invoke (*copy, "Undo clone"); // UNDO 2
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ASSERT (command1::check_ == state_after_exec1);
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// testUndo.invoke (*copy, "Undo clone"); // UNDO 2
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// ASSERT (command1::check_ == state_after_exec1);
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// invoke UNDO on original
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testUndo.invoke (*orig, "Undo original"); // UNDO 1
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ASSERT (command1::check_ ==0);
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// ASSERT (command1::check_ ==0);
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ASSERT (copy != orig);
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}
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