[boost] bitmask operations (2)

Subject: [boost] bitmask operations (2)
From: Arno Schödl (aschoedl_at_[hidden])
Date: 2008-09-23 04:55:54

Sorry, _REGEX_BITMASK_OPS is from Dinkumware's library, so disregard:-( 

What is the boost way to define an enum

enum EBitmask {
  ebitmaskFLAGA=1,
  ebitmaskFLAGB=2
};

such that operations like

ebitmask |= ebitmaskFLAGA;

can be used? 

In boost.regex, it is currently implemented specifically for match_flags:

#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
typedef unsigned long match_flag_type;
#else
typedef match_flags match_flag_type;

#ifdef __cplusplus
inline match_flags operator&(match_flags m1, match_flags m2)
{ return static_cast<match_flags>(static_cast<boost::int32_t>(m1) & static_cast<boost::int32_t>(m2)); }
inline match_flags operator|(match_flags m1, match_flags m2)
{ return static_cast<match_flags>(static_cast<boost::int32_t>(m1) | static_cast<boost::int32_t>(m2)); }
inline match_flags operator^(match_flags m1, match_flags m2)
{ return static_cast<match_flags>(static_cast<boost::int32_t>(m1) ^ static_cast<boost::int32_t>(m2)); }
inline match_flags operator~(match_flags m1)
{ return static_cast<match_flags>(~static_cast<boost::int32_t>(m1)); }
inline match_flags& operator&=(match_flags& m1, match_flags m2)
{ m1 = m1&m2; return m1; }
inline match_flags& operator|=(match_flags& m1, match_flags m2)
{ m1 = m1|m2; return m1; }
inline match_flags& operator^=(match_flags& m1, match_flags m2)
{ m1 = m1^m2; return m1; }
#endif
#endif

Regards,

Arno

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Dr. Arno Schoedl · aschoedl_at_[hidden] 
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