152 lines
6.1 KiB
C++
152 lines
6.1 KiB
C++
/*
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AccessCasted(Test) - verify helper to cast or convert as appropriate
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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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/access-casted.hpp"
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using std::string;
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using std::cout;
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using std::ostream;
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namespace util {
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namespace test {
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namespace { // Test fixture...
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struct B {};
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struct D : B {};
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struct E : D
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{
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virtual ~E() {};
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};
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struct F : E {};
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using lib::test::tyAbbr;
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ostream& operator<< (ostream& s, const B& b) { return s << "B{} adr="<<&b<<" type: "<<tyAbbr(b); }
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ostream& operator<< (ostream& s, const D& d) { return s << "D{} adr="<<&d<<" type: "<<tyAbbr(d); }
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ostream& operator<< (ostream& s, const E& e) { return s << "E{} adr="<<&e<<" type: "<<tyAbbr(e); }
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ostream& operator<< (ostream& s, const F& f) { return s << "F{} adr="<<&f<<" type: "<<tyAbbr(f); }
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}//(End)Test fixture
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/*************************************************************************************************//**
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* @test verify a helper template for accessing values either through conversion or (dynamic) downcast.
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* Typically, this helper is used in value holder containers or variant-like data structures,
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* where the actual type is given at instantiation time of the template and possibly erased.
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*/
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class AccessCasted_test : public Test
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{
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virtual void
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run (Arg)
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{
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D d;
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D* pD =&d;
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B* pB =pD;
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D& rD = *pD;
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B& rB = *pB;
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D*& rpD = pD;
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B*& rpB = pB;
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F f;
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E& rE = f;
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E* pE = &f;
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D* pDE = pE;
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cout << "is_base_of<B,D> = " << is_base_of<B ,D >::value << "\n";
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cout << "is_base_of<B*,D*> = " << is_base_of<B*,D*>::value << "\n";
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cout << "is_base_of<B&,D&> = " << is_base_of<B&,D&>::value << "\n";
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cout << "can_cast<B,D> = " << can_cast<B,D>::value << "\n";
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cout << "can_cast<B*,D*> = " << can_cast<B*,D*>::value << "\n";
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cout << "can_cast<B&,D&> = " << can_cast<B&,D&>::value << "\n";
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cout << "can_cast<B&,D*> = " << can_cast<B&,D*>::value << "\n";
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cout << "can_cast<B*,D&> = " << can_cast<B*,D&>::value << "\n";
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cout << "can_cast<B*&,D*&> = " << can_cast<B*&,D*&>::value << "\n";
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cout << "can_cast<D*&,D*&> = " << can_cast<D*&,D*&>::value << "\n";
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cout << "can_cast<D*,E*> = " << can_cast<D*,E*>::value << "\n";
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cout << "can_cast<E*,F*> = " << can_cast<E*,F*>::value << "\n";
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cout << "has_RTTI<D*> = " << has_RTTI<D*>::value << "\n";
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cout << "has_RTTI<E*> = " << has_RTTI<E*>::value << "\n";
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cout << "has_RTTI<F*> = " << has_RTTI<F*>::value << "\n";
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cout << "use_dynamic_downcast<B*,D*> = " << use_dynamic_downcast<B*,D*>::value << "\n";
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cout << "use_static_downcast<B*,D*> = " << use_static_downcast<B*,D*>::value << "\n";
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cout << "use_conversion<D*,B*> = " << use_conversion<D*,B*>::value << "\n";
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cout << "use_static_downcast<D*&,D*&> = " << use_static_downcast<D*&,D*&>::value << "\n";
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cout << "use_static_downcast<D*,E*> = " << use_static_downcast<D*,E*>::value << "\n";
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cout << "use_dynamic_downcast<D*&,E*> = " << use_dynamic_downcast<D*&,E*>::value << "\n";
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cout << "Access(D as D&) --->" << AccessCasted<D&>::access(d) << "\n";
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cout << "Access(D& as D&) --->" << AccessCasted<D&>::access(rD) << "\n";
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cout << "Access(B& as D&) --->" << AccessCasted<D&>::access(rB) << "\n";
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cout << "Access(D* as D*) --->" << AccessCasted<D*>::access(pD) << "\n";
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cout << "Access(B* as D*) --->" << AccessCasted<D*>::access(pB) << "\n";
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cout << "Access(D*& as D*&) --->" << AccessCasted<D*&>::access(rpD) << "\n";
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cout << "Access(B*& as D*&) --->" << AccessCasted<D*&>::access(rpB) << "\n";
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cout << "Access(D as B&) --->" << AccessCasted<B&>::access(d) << "\n";
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cout << "Access(D& as B&) --->" << AccessCasted<B&>::access(rD) << "\n";
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cout << "Access(B& as B&) --->" << AccessCasted<D&>::access(rB) << "\n";
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cout << "Access(D* as B*) --->" << AccessCasted<B*>::access(pD) << "\n";
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cout << "Access(B* as B*) --->" << AccessCasted<B*>::access(pB) << "\n";
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cout << "Access(D*& as B*&) --->" << AccessCasted<B*&>::access(rpD) << "\n";
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cout << "Access(B*& as B*&) --->" << AccessCasted<B*&>::access(rpB) << "\n";
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cout << "Access(D as E&) --->" << AccessCasted<E&>::access(d) << "\n";
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cout << "Access(E& as F&) --->" << AccessCasted<F&>::access(rE) << "\n";
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cout << "Access(D(E)* as E*) --->" << AccessCasted<E*>::access(pDE) << "\n";
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cout << "Access(D(E)* as F*) --->" << AccessCasted<F*>::access(pDE) << "\n";
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cout << "Access(E* as F*) --->" << AccessCasted<F*>::access(pE) << "\n";
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}
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};
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/** Register this test class... */
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LAUNCHER (AccessCasted_test, "unit common");
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}} // namespace lib::meta::test
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