genericopenlibs/cppstdlib/stl/test/unit/mfunptr_test.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 02:01:42 +0200
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Revision: 201002 Kit: 201005
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#include <functional>
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#include <memory>
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#include <vector>
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#include <algorithm>
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#include "cppunit/cppunit_proxy.h"
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#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
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using namespace std;
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#endif
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//
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// TestCase class
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//
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class MemFunPtrTest : public CPPUNIT_NS::TestCase
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{
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  CPPUNIT_TEST_SUITE(MemFunPtrTest);
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  CPPUNIT_TEST(mem_ptr_fun);
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#if defined (STLPORT) && !defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
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  //This test require partial template specialization feature to avoid the
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  //reference to reference problem. No workaround yet for limited compilers.
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  CPPUNIT_IGNORE;
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#endif
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  CPPUNIT_TEST(find);
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  CPPUNIT_TEST_SUITE_END();
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protected:
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  // compile test not neccessary to run but...
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  void mem_ptr_fun();
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  void find();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(MemFunPtrTest);
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#if defined(_STLP_DONT_RETURN_VOID) && (defined(_STLP_NO_MEMBER_TEMPLATE_CLASSES) && defined(_STLP_NO_CLASS_PARTIAL_SPECIALIZATION))
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#  define _STLP_DONT_TEST_RETURN_VOID
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#endif
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//else there is no workaround for the return void bug
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struct S1 { } s1;
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struct S2 { } s2;
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int f1(S1&);
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int f2(S1&, S2&);
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int f1c(const S1&);
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int f2c(const S1&, const S2&);
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void vf1(S1&);
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void vf2(S1&, S2&);
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void vf1c(const S1&);
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void vf2c(const S1&, const S2&);
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class Class {
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public:
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  int f0();
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  int f1(const S1&);
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  void vf0();
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  void vf1(const S1&);
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  int f0c() const;
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  int f1c(const S1&) const;
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  void vf0c() const;
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  void vf1c(const S1&) const;
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};
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//
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// tests implementation
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//
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void MemFunPtrTest::mem_ptr_fun()
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{
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  Class obj;
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  const Class& objc = obj;
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  // ptr_fun
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  ptr_fun(f1)(s1);
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  ptr_fun(f2)(s1, s2);
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  ptr_fun(f1c)(s1);
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  ptr_fun(f2c)(s1, s2);
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#ifndef _STLP_DONT_TEST_RETURN_VOID
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  ptr_fun(vf1)(s1);
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  ptr_fun(vf2)(s1, s2);
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  ptr_fun(vf1c)(s1);
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  ptr_fun(vf2c)(s1, s2);
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#endif /* _STLP_DONT_TEST_RETURN_VOID */
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  // mem_fun
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  mem_fun(&Class::f0)(&obj);
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  mem_fun(&Class::f1)(&obj, s1);
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#ifndef _STLP_DONT_TEST_RETURN_VOID
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  mem_fun(&Class::vf0)(&obj);
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  mem_fun(&Class::vf1)(&obj, s1);
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#endif /* _STLP_DONT_TEST_RETURN_VOID */
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  // mem_fun (const)
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  mem_fun(&Class::f0c)(&objc);
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  mem_fun(&Class::f1c)(&objc, s1);
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#ifndef _STLP_DONT_TEST_RETURN_VOID
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  mem_fun(&Class::vf0c)(&objc);
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  mem_fun(&Class::vf1c)(&objc, s1);
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#endif /* _STLP_DONT_TEST_RETURN_VOID */
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  // mem_fun_ref
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  mem_fun_ref(&Class::f0)(obj);
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  mem_fun_ref(&Class::f1)(obj, s1);
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#ifndef _STLP_DONT_TEST_RETURN_VOID
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  mem_fun_ref(&Class::vf0)(obj);
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  mem_fun_ref(&Class::vf1)(obj, s1);
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#endif /* _STLP_DONT_TEST_RETURN_VOID */
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  // mem_fun_ref (const)
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  mem_fun_ref(&Class::f0c)(objc);
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  mem_fun_ref(&Class::f1c)(objc, s1);
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#ifndef _STLP_DONT_TEST_RETURN_VOID
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  mem_fun_ref(&Class::vf0c)(objc);
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  mem_fun_ref(&Class::vf1c)(objc, s1);
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#endif /* _STLP_DONT_TEST_RETURN_VOID */
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}
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int f1(S1&)
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{return 1;}
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int f2(S1&, S2&)
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{return 2;}
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int f1c(const S1&)
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{return 1;}
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int f2c(const S1&, const S2&)
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{return 2;}
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void vf1(S1&)
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{}
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void vf2(S1&, S2&)
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{}
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void vf1c(const S1&)
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{}
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void vf2c(const S1&, const S2&)
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{}
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int Class::f0()
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{return 0;}
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int Class::f1(const S1&)
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{return 1;}
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void Class::vf0()
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{}
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void Class::vf1(const S1&)
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{}
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int Class::f0c() const
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{return 0;}
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int Class::f1c(const S1&) const
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{return 1;}
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void Class::vf0c() const
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{}
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void Class::vf1c(const S1&) const
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{}
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struct V {
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  public:
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    V(int _v) :
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      v(_v)
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    { }
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  bool f( int _v ) const { return (v == _v); }
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  int v;
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#if defined (__DMC__)
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  V(){}
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#endif
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};
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void MemFunPtrTest::find()
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{
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#if !defined (STLPORT) || defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
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  vector<V> v;
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  v.push_back( V(1) );
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  v.push_back( V(2) );
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  v.push_back( V(3) );
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  // step-by-step complication of work for compiler:
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  // step 1:
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  const_mem_fun1_ref_t<bool,V,int> pmf = mem_fun_ref( &V::f );
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  binder2nd<const_mem_fun1_ref_t<bool,V,int> > b(pmf, 2);
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  vector<V>::iterator i = find_if( v.begin(), v.end(), b );
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  CPPUNIT_ASSERT(i != v.end());
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  CPPUNIT_ASSERT(i->v == 2);
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  // step 2, just check that compiler understand what pass to bind2nd:
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  binder2nd<const_mem_fun1_ref_t<bool,V,int> > b2 = bind2nd( pmf, 2 );
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  // step 3, the same as step 1, but more intellect from compiler required:
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  binder2nd<const_mem_fun1_ref_t<bool,V,int> > b3 = bind2nd( mem_fun_ref( &V::f ), 2 );
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  vector<V>::iterator j = find_if( v.begin(), v.end(), b3 );
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  CPPUNIT_ASSERT(j != v.end());
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  CPPUNIT_ASSERT(j->v == 2);
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  // step 4, more brief, more complex:
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  vector<V>::iterator k = find_if( v.begin(), v.end(), bind2nd( mem_fun_ref( &V::f ), 2 ) );
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  CPPUNIT_ASSERT(k != v.end());
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  CPPUNIT_ASSERT(k->v == 2);
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#endif
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}
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#ifdef _STLP_DONT_TEST_RETURN_VOID
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#  undef _STLP_DONT_TEST_RETURN_VOID
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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#endif