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Coding Standards
Front Page / Metafunctions / Bitwise Operations / bitor_ |
template< typename T1 , typename T2 , typename T3 = unspecified ... , typename Tn = unspecified > struct bitor_ { typedef unspecified type; };
Returns the result of bitwise or (|) operation of its arguments.
#include <boost/mpl/bitor.hpp> #include <boost/mpl/bitwise.hpp>
Parameter | Requirement | Description |
---|---|---|
T1, T2,... Tn | Integral Constant | Operation's arguments. |
[Note: The requirements listed in this specification are the ones imposed by the default implementation. See Numeric Metafunction concept for the details on how to provide an implementation for a user-defined numeric type that does not satisfy the Integral Constant requirements. — end note]
For any Integral Constants c1,c2,... cn:
typedef bitor_<c1,...cn>::type r;
Return type: | |
---|---|
Semantics: | Equivalent to typedef integral_c< typeof(c1::value | c2::value) , ( c1::value | c2::value ) > c; typedef bitor_<c,c3,...cn>::type r; |
typedef bitor_<c1,...cn> r;
Return type: | |
---|---|
Semantics: | Equivalent to struct r : bitor_<c1,...cn>::type {}; |
Amortized constant time.
typedef integral_c<unsigned,0> u0; typedef integral_c<unsigned,1> u1; typedef integral_c<unsigned,2> u2; typedef integral_c<unsigned,8> u8; typedef integral_c<unsigned,0xffffffff> uffffffff; BOOST_MPL_ASSERT_RELATION( (bitor_<u0,u0>::value), ==, 0 ); BOOST_MPL_ASSERT_RELATION( (bitor_<u1,u0>::value), ==, 1 ); BOOST_MPL_ASSERT_RELATION( (bitor_<u0,u1>::value), ==, 1 ); BOOST_MPL_ASSERT_RELATION( (bitor_<u0,uffffffff>::value), ==, 0xffffffff ); BOOST_MPL_ASSERT_RELATION( (bitor_<u1,uffffffff>::value), ==, 0xffffffff ); BOOST_MPL_ASSERT_RELATION( (bitor_<u8,uffffffff>::value), ==, 0xffffffff );