ss_mode.hpp

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#ifndef __SS_MODE_HPP__
#define __SS_MODE_HPP__


#define INTERNAL_MODE_FLAG "int"

#define PROT_INTERNAL_MODE_FLAG "prot_int"

#define EXTERNAL_MODE_FLAG "ext"


struct SSMode final {

 SSMode( const char *const m );

 SSMode() = delete;


 const char *const str;

 const bool is_internal;

 const bool is_protected_internal;

 const bool is_external;

 const bool is_valid_mode;
};


/*********************************************************/
/* */
/* Static assertions */
/* */
/*********************************************************/


static constexpr bool str_equal( const char *const s1, const char *const s2 ) {
 return ( s1[0] != s2[0] ) ? false :
 ( s1[0] == 0 ) ? true : str_equal( s1 + 1, s2 + 1 );
}


static_assert( !str_equal( INTERNAL_MODE_FLAG, EXTERNAL_MODE_FLAG ),
 "internal mode flag cannot equal external mode flag" );
static_assert( !str_equal( INTERNAL_MODE_FLAG, PROT_INTERNAL_MODE_FLAG ),
 "internal mode flag cannot equal protected internal mode flag" );
static_assert( !str_equal( PROT_INTERNAL_MODE_FLAG, EXTERNAL_MODE_FLAG ),
 "protected iternal mode flag cannot equal external mode flag" );


#endif