libzypp  17.6.1
DefaultIntegral.h
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12 #ifndef ZYPP_BASE_DEFAULTINTEGRAL_H
13 #define ZYPP_BASE_DEFAULTINTEGRAL_H
14 
15 #include <iosfwd>
16 #include <boost/static_assert.hpp>
17 #include <boost/type_traits/is_integral.hpp>
18 
20 namespace zypp
21 {
22 
23 
25  //
26  // CLASS NAME : DefaultIntegral<Tp,TInitial>
27  //
40  template<class Tp, Tp TInitial>
42  {
43  public:
44  typedef Tp value_type;
45 
46  public:
47  DefaultIntegral( Tp val_r = TInitial )
48  : _val( val_r )
49  { BOOST_STATIC_ASSERT(boost::is_integral<Tp>::value); }
50 
53  Tp & get() { return _val; }
54  Tp get() const { return _val; }
55 
56  operator Tp &() { return get(); }
57  operator Tp () const { return get(); }
59 
61  constexpr Tp initial() const { return TInitial; }
62 
64  DefaultIntegral & reset() { _val = TInitial; return *this; }
65 
70  DefaultIntegral & operator=( Tp rhs ) { _val = rhs; return *this; }
71  DefaultIntegral & operator+=( Tp rhs ) { _val += rhs; return *this; }
72  DefaultIntegral & operator-=( Tp rhs ) { _val -= rhs; return *this; }
73  DefaultIntegral & operator*=( Tp rhs ) { _val *= rhs; return *this; }
74  DefaultIntegral & operator/=( Tp rhs ) { _val /= rhs; return *this; }
75 
76  DefaultIntegral & operator++(/*prefix*/) { ++_val; return *this; }
77  DefaultIntegral & operator--(/*prefix*/) { --_val; return *this; }
78 
79  DefaultIntegral operator++(int/*postfix*/) { return _val++; }
80  DefaultIntegral operator--(int/*postfix*/) { return _val--; }
82 
83  private:
84  Tp _val;
85  };
86 
89 
92 
94  template<typename TIntegral>
96 
97  template<class Tp, Tp TInitial>
98  std::string asString( const DefaultIntegral<Tp,TInitial> & obj )
99  { return asString( obj.get() ); }
100 
102 } // namespace zypp
104 #endif // ZYPP_BASE_DEFAULTINTEGRAL_H
Tp & get()
Conversion to Tp.
DefaultIntegral & operator=(Tp rhs)
DefaultIntegral operator--(int)
DefaultIntegral< bool, false > FalseBool
std::string asString(const DefaultIntegral< Tp, TInitial > &obj)
DefaultIntegral & operator*=(Tp rhs)
DefaultIntegral & reset()
Reset to the defined initial value.
DefaultIntegral< bool, true > TrueBool
DefaultIntegral operator++(int)
DefaultIntegral & operator-=(Tp rhs)
Integral type with defined initial value when default constructed.
DefaultIntegral & operator--()
DefaultIntegral & operator/=(Tp rhs)
DefaultIntegral & operator++()
constexpr Tp initial() const
The initial value.
DefaultIntegral & operator+=(Tp rhs)
DefaultIntegral(Tp val_r=TInitial)
Easy-to use interface to the ZYPP dependency resolver.
Definition: CodePitfalls.doc:1