flags.hh File Reference

#include <mia/core/defines.hh>

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Macros
#define	IMPLEMENT_FLAG_OPERATIONS(E)

Macro Definition Documentation

IMPLEMENT_FLAG_OPERATIONS

#define IMPLEMENT_FLAG_OPERATIONS

(

E

)

Value:

inline E operator | (E lhs, E rhs)                              \
        {                                                               \
                return static_cast<E>(  static_cast<int>(lhs) | static_cast<int>(rhs)); \
        }                                                               \
                                                                        \
        inline E operator  & (E lhs, E rhs)                             \
        {                                                               \
                return static_cast<E>(  static_cast<int>(lhs) & static_cast<int>(rhs)); \
        }                                                               \
                                                                        \
        inline E operator -= (E& lhs, E rhs)                            \
        {                                                               \
                lhs = static_cast<E>(  static_cast<int>(lhs) & ~static_cast<int>(rhs)); \
                return lhs;                                             \
        }                                                               \
                                                                        \
        inline bool has_flag(E flags, E test)                           \
        {                                                               \
                return (flags & test) == test;                          \
        }

This macro implements operations on a strongly typed enum that is used as a flag. We use a macro since we don't want to provide a template that would be valid for all types that don't have these operators implemented

Definition at line 36 of file flags.hh.