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Research: extend to variadic template calls

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also improve the diagnostics to show pass-by LRef or RRef

but unfortunately not able to reproduce the problematic case yet
This commit is contained in:
Fischlurch 2014-09-21 19:26:35 +02:00
parent 264b7e8e0f
commit e676eb6da8
1 changed files with 42 additions and 17 deletions
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59
research/try.cpp
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@ -51,6 +51,16 @@ using std::endl;
class Interface
{
public:
Interface(){}
Interface(Interface const& o) { cout << "COPY.CT from "<<&o<<" !!!\n"; }
Interface(Interface const&& o) { cout << "MOVE.CT from "<<&o<<" !!!\n"; }
Interface&
operator= (Interface const& o) { cout << "COPY= from "<<&o<<" !!!\n"; return *this; }
Interface&
operator= (Interface const&& o) { cout << "MOVE= from "<<&o<<" !!!\n"; return *this; }
virtual ~Interface() { }
virtual string op() const =0;
};
@ -73,42 +83,57 @@ class Impl
};
template<typename X>
void
diagnostics (string id, const void* addr)
string
showRefRRefVal()
{
cout << id << "\n"
<< "invoked with.. " << lib::test::showType<X>()
<< "\n Address ... " << addr
<< "\n is lRef ... " << std::is_lvalue_reference<X>::value
<< "\n is rRef ... " << std::is_rvalue_reference<X>::value
return std::is_lvalue_reference<X>::value? " by REF"
: std::is_rvalue_reference<X>::value? " by MOVE": " VAL";
}
template<typename X>
void
diagnostics (string id, X const& x)
{
cout << "--"<<id<<"-- Type... " << lib::test::showType<X>()
<< "\n Address ... " << &x
<< showRefRRefVal<X>()
<< "\n"
;
}
template<typename X, typename... XS>
void
diagnostics (string id, X const& x, XS const&... xs)
{
diagnostics<X> (id, x);
diagnostics<XS...> (id, xs...);
}
void
invoke (Interface const& ref)
{
using Ty = Interface const&;
diagnostics<Ty> ("Invoke", &ref);
diagnostics<Ty> ("Invoke", ref);
cout << "instanceof Impl?" << bool(INSTANCEOF(Impl, &ref)) <<"\n";
cout << ref.op();
cout << "________________"
<< ref.op()
<< "____\n";
}
template<class FUN, typename A>
template<class FUN, typename...ARG>
void
indirect_1 (FUN fun, A&& a)
indirect_1 (FUN fun, ARG&&... args)
{
diagnostics<A> ("Indirect-1", &a);
fun (std::forward<A> (a));
diagnostics<ARG&&...> ("Indirect-1", args...);
fun (std::forward<ARG> (args)...);
}
template<class FUN, typename A>
template<class FUN, typename...ARG>
void
indirect_2 (FUN fun, A&& a)
indirect_2 (FUN fun, ARG&&... args)
{
diagnostics<A> ("Indirect-2", &a);
indirect_1 (fun, std::forward<A> (a));
diagnostics<ARG&&...> ("Indirect-2", args...);
indirect_1 (fun, std::forward<ARG>(args)...);
}