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refactor CmdClosure to accept a cloneBuilder visitor

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This commit is contained in:
Fischlurch 2009-10-10 03:10:05 +02:00
parent bb7ff5e317
commit e32044e453
2 changed files with 22 additions and 10 deletions
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2
src/proc/control/command-argument-holder.hpp
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@ -104,7 +104,7 @@ namespace control {
*/
template<typename SIG, typename MEM>
class ArgumentHolder
: public CmdClosure
: public AbstractClosure
{
/** copy construction allowed(but no assignment)*/
ArgumentHolder& operator= (ArgumentHolder const&);

30
src/proc/control/command-closure.hpp
View file

@ -117,6 +117,9 @@ namespace control {
*/
typedef FunErasure<StoreFunction> CmdFunctor;
class CommandImplCloneBuilder;
class CmdClosure;
typedef std::tr1::shared_ptr<CmdClosure> PClo;
@ -129,18 +132,28 @@ namespace control {
public:
virtual ~CmdClosure() {}
virtual operator string() const =0;
virtual bool isValid () const =0; ///< does this closure hold a valid argument tuple?
virtual bool isCaptured () const =0; ///< does this closure hold captured UNDO state?
virtual bool equals (CmdClosure const&) const =0; ///< is equivalent to the given other closure?
virtual void bindArguments (Arguments&) =0; ///< store a set of parameter values within this closure
virtual void invoke (CmdFunctor const&) =0; ///< invoke functor using the stored parameter values
virtual PClo createClone (TypedAllocationManager&) =0; ///< create clone allocation without disclosing concrete type
virtual operator string() const =0;
virtual bool isValid () const =0; ///< does this closure hold a valid argument tuple?
virtual bool isCaptured () const =0; ///< does this closure hold captured UNDO state?
virtual bool equals (CmdClosure const&) const =0; ///< is equivalent to the given other closure?
virtual void bindArguments (Arguments&) =0; ///< store a set of parameter values within this closure
virtual void invoke (CmdFunctor const&) =0; ///< invoke functor using the stored parameter values
virtual void accept (CommandImplCloneBuilder&) const =0; ///< assist with creating clone closure without disclosing concrete type
};
inline ostream& operator<< (ostream& os, const CmdClosure& clo) { return os << string(clo); }
class AbstractClosure
: public CmdClosure
{
bool isValid() const { return false; }
bool isCaptured() const { return false; }
void accept (CommandImplCloneBuilder&) const {}
};
/** Helper for accessing an individual function parameter */
@ -209,7 +222,7 @@ namespace control {
template<typename SIG>
class Closure
: public CmdClosure
: public AbstractClosure
{
typedef typename FunctionSignature< function<SIG> >::Args Args;
@ -273,7 +286,6 @@ namespace control {
bool isValid () const { return true; }
bool isCaptured() const { return false; }
/// Supporting equality comparisons...
friend bool operator== (Closure const& c1, Closure const& c2) { return compare (c1.params_, c2.params_); }