boostorg/utility
1
0
Fork 1
mirror of https://github.com/boostorg/utility.git synced 2025-10-10 23:55:20 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add constexpr to operators (w/ basic docs, tests)

Browse Source
This commit is contained in:
Tony Lewis
2018-12-21 10:28:22 +00:00
parent ce64b13846
commit e8d2b2ba76
3 changed files with 261 additions and 134 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
test/operators_test.cpp
View File

@@ -50,9 +50,9 @@ namespace
void operator!() const;
public:
convertible_to_bool( const bool value ) : _value( value ) {}
BOOST_CONSTEXPR convertible_to_bool( const bool value ) : _value( value ) {}
operator unspecified_bool_type() const
BOOST_CONSTEXPR operator unspecified_bool_type() const
{ return _value ? &convertible_to_bool::_value : 0; }
};
@@ -64,36 +64,36 @@ namespace
, boost::shiftable<Wrapped1<T> >
{
public:
explicit Wrapped1( T v = T() ) : _value(v) {}
T value() const { return _value; }
BOOST_CONSTEXPR explicit Wrapped1( T v = T() ) : _value(v) {}
BOOST_CONSTEXPR T value() const { return _value; }
convertible_to_bool operator<(const Wrapped1& x) const
BOOST_CONSTEXPR convertible_to_bool operator<(const Wrapped1& x) const
{ return _value < x._value; }
convertible_to_bool operator==(const Wrapped1& x) const
BOOST_CONSTEXPR convertible_to_bool operator==(const Wrapped1& x) const
{ return _value == x._value; }
Wrapped1& operator+=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator+=(const Wrapped1& x)
{ _value += x._value; return *this; }
Wrapped1& operator-=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator-=(const Wrapped1& x)
{ _value -= x._value; return *this; }
Wrapped1& operator*=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator*=(const Wrapped1& x)
{ _value *= x._value; return *this; }
Wrapped1& operator/=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator/=(const Wrapped1& x)
{ _value /= x._value; return *this; }
Wrapped1& operator%=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator%=(const Wrapped1& x)
{ _value %= x._value; return *this; }
Wrapped1& operator|=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator|=(const Wrapped1& x)
{ _value |= x._value; return *this; }
Wrapped1& operator&=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator&=(const Wrapped1& x)
{ _value &= x._value; return *this; }
Wrapped1& operator^=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator^=(const Wrapped1& x)
{ _value ^= x._value; return *this; }
Wrapped1& operator<<=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator<<=(const Wrapped1& x)
{ _value <<= x._value; return *this; }
Wrapped1& operator>>=(const Wrapped1& x)
BOOST_CXX14_CONSTEXPR Wrapped1& operator>>=(const Wrapped1& x)
{ _value >>= x._value; return *this; }
Wrapped1& operator++() { ++_value; return *this; }
Wrapped1& operator--() { --_value; return *this; }
BOOST_CXX14_CONSTEXPR Wrapped1& operator++() { ++_value; return *this; }
BOOST_CXX14_CONSTEXPR Wrapped1& operator--() { --_value; return *this; }
private:
T _value;
@@ -932,5 +932,64 @@ main()
cout << "Performed tests on MyLongInt objects.\n";
// Where C++11 constexpr is available, compile-time test some of the operators that are able to use it to propagate constexpr
#ifndef BOOST_NO_CXX11_CONSTEXPR
static_assert( ! static_cast<bool>( MyInt{ 1 } == MyInt{ 2 } ), "" );
static_assert( MyInt{ 1 } != MyInt{ 2 }, "" );
static_assert( MyInt{ 1 } < MyInt{ 2 }, "" );
static_assert( MyInt{ 1 } <= MyInt{ 2 }, "" );
static_assert( ! static_cast<bool>( MyInt{ 1 } > MyInt{ 2 } ), "" );
static_assert( ! static_cast<bool>( MyInt{ 1 } >= MyInt{ 2 } ), "" );
static_assert( ! static_cast<bool>( MyInt{ 2 } == MyInt{ 1 } ), "" );
static_assert( MyInt{ 2 } != MyInt{ 1 }, "" );
static_assert( ! static_cast<bool>( MyInt{ 2 } < MyInt{ 1 } ), "" );
static_assert( ! static_cast<bool>( MyInt{ 2 } <= MyInt{ 1 } ), "" );
static_assert( MyInt{ 2 } > MyInt{ 1 }, "" );
static_assert( MyInt{ 2 } >= MyInt{ 1 }, "" );
static_assert( MyInt{ 1 } == MyInt{ 1 }, "" );
static_assert( ! static_cast<bool>( MyInt{ 1 } != MyInt{ 1 } ), "" );
static_assert( ! static_cast<bool>( MyInt{ 1 } < MyInt{ 1 } ), "" );
static_assert( MyInt{ 1 } <= MyInt{ 1 }, "" );
static_assert( ! static_cast<bool>( MyInt{ 1 } > MyInt{ 1 } ), "" );
static_assert( MyInt{ 1 } >= MyInt{ 1 }, "" );
#endif
// Where C++14 constexpr is available, compile-time test some of the operators that are able to use it to propagate constexpr
#ifndef BOOST_NO_CXX14_CONSTEXPR
static_assert( ( MyInt{ 1 } + MyInt{ 2 } ) == MyInt{ 3 }, "" );
static_assert( ( MyInt{ 2 } + MyInt{ 1 } ) == MyInt{ 3 }, "" );
static_assert( ( MyInt{ 2 } + MyInt{ 1 } ) == MyInt{ 3 }, "" );
static_assert( ( MyInt{ 2 } + MyInt{ 2 } ) == MyInt{ 4 }, "" );
static_assert( ( MyInt{ 3 } + MyInt{ 2 } ) == MyInt{ 5 }, "" );
static_assert( ( MyInt{ 5 } - MyInt{ 1 } ) == MyInt{ 4 }, "" );
static_assert( ( MyInt{ 3 } * MyInt{ 3 } ) == MyInt{ 9 }, "" );
static_assert( ( MyInt{ 4 } * MyInt{ 2 } ) == MyInt{ 8 }, "" );
static_assert( ( MyInt{ 8 } / MyInt{ 2 } ) == MyInt{ 4 }, "" );
static_assert( ( MyInt{ 4 } % MyInt{ 3 } ) == MyInt{ 1 }, "" );
static_assert( ( MyInt{ 7 } & MyInt{ 2 } ) == MyInt{ 2 }, "" );
static_assert( ( MyInt{ 1 } | MyInt{ 2 } ) == MyInt{ 3 }, "" );
static_assert( ( MyInt{ 1 } | MyInt{ 4 } ) == MyInt{ 5 }, "" );
static_assert( ( MyInt{ 2 } | MyInt{ 1 } ) == MyInt{ 3 }, "" );
static_assert( ( MyInt{ 2 } | MyInt{ 4 } ) == MyInt{ 6 }, "" );
static_assert( ( MyInt{ 3 } | MyInt{ 4 } ) == MyInt{ 7 }, "" );
static_assert( ( MyInt{ 5 } | MyInt{ 2 } ) == MyInt{ 7 }, "" );
static_assert( ( MyInt{ 6 } | MyInt{ 1 } ) == MyInt{ 7 }, "" );
static_assert( ( MyInt{ 3 } ^ MyInt{ 1 } ) == MyInt{ 2 }, "" );
static_assert( ( MyInt{ 1 } << MyInt{ 2 } ) == MyInt{ 4 }, "" );
static_assert( ( MyInt{ 2 } >> MyInt{ 1 } ) == MyInt{ 1 }, "" );
#endif
return boost::report_errors();
}