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FOR_EACH and LOCK

, November 01, 2003

Eric and Anson match the functionality and ease-of-use of C#'s lock and foreach with their C++ implementations of FOR_EACH and LOCK, then apply their approaches to both native C++ types and STL containers.
FOR_EACH and LOCK

Listing 5: Final FOR_EACH.

#define ENUM_T(coll) \
    enumerator<sizeof(select(coll))>
#define FOR_EACH( type, var, coll ) \
    if( ENUM_T(coll)::enum_type _num_ = 0 ) {} \
    else if( ENUM_T(coll)::init_enum(_num_, coll) ) {} \
    else for( type var; ENUM_T(coll)::move_next(var,_num_,coll); )



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