DtEnumClassFlag.h File Reference

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Classes
struct	is_flag< T, bool >
struct	is_flag< T, true >

Functions
template<typename T , typename std::enable_if< is_flag< T >::value >::type * = nullptr>
T	operator| (T lhs, T rhs)
template<typename T , typename std::enable_if< is_flag< T >::value >::type * = nullptr>
T	operator& (T lhs, T rhs)

Detailed Description

Contains generic operator overrides for enum classes to allow for bitwise operations, e.g. | and &.

By default, enum classes do not support bitwise operations. This header partially addresses that by overriding the | and & bitwise operators in a generic way (using templates):

To make some enum class (some_enum) support bitwise operations: enum class some_enum : unsigned int { foo = 0x0001, bar = 0x0002, boo = 0x0004 };

You would do the following: #include <vrvUtil/DtEnumClassFlag.h>

template <> struct is_flag<some_enum> : std::true_type { };

Function Documentation

template<typename T , typename std::enable_if< is_flag< T >::value >::type * = nullptr>

T operator|	(	T	lhs,
		T	rhs
	)

template<typename T , typename std::enable_if< is_flag< T >::value >::type * = nullptr>

T operator&	(	T	lhs,
		T	rhs
	)