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Use unsigned char as the underlying type for the tribool state #28

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Use unsigned char as the underlying type for the tribool state #28

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6 changes: 5 additions & 1 deletion include/boost/logic/tribool.hpp
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Expand Up @@ -131,7 +131,11 @@ class tribool
* The actual stored value in this 3-state boolean, which may be false, true,
* or indeterminate.
*/
enum value_t { false_value, true_value, indeterminate_value } value;
enum value_t
#if !defined( BOOST_NO_CXX11_SCOPED_ENUMS )
: unsigned char
#endif
{ false_value, true_value, indeterminate_value } value;
};

// Check if the given tribool has an indeterminate value. Also doubles as a
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