{"id":1031,"date":"2022-05-22T23:03:11","date_gmt":"2022-05-23T03:03:11","guid":{"rendered":"https:\/\/jausoft.com\/blog\/?p=1031"},"modified":"2023-01-03T01:46:23","modified_gmt":"2023-01-03T05:46:23","slug":"identifiable-cpp-function-pointer-direct_bt_pt2","status":"publish","type":"post","link":"https:\/\/jausoft.com\/blog\/2022\/05\/22\/identifiable-cpp-function-pointer-direct_bt_pt2\/","title":{"rendered":"Identifiable C++ Function Pointer of any kind in Direct-BT (Part 2)"},"content":{"rendered":"

Earlier I started elaborating on Direct-BT C++ implementation details<\/a>, covering communication channels and data structures<\/a> suitable for concurrency<\/a>.<\/p>\n

This part shall cover Jaulib’s jau::function<R(A…)><\/a>, used to manage callback lists e.g. in BTManager<\/a> or simply utilizing them to delegate functionality like in jau::service_runner<\/a>.<\/p>\n

Updated on 2023-01-03: Matching new class name and properties.<\/p>\n

Function Overview<\/h3>\n

Similar to std::function, jau::function<R(A…)><\/a> stores any callable target function solely described by its return type R<\/code> and arguments types A...<\/code> from any source, e.g. free functions, capturing and non-capturing lambda function, member functions.<\/p>\n

jau::function<R(A…)><\/a> supports equality operations for all func::target_type<\/a> source types, allowing to manage container of jau::function<\/a>s, see limitations<\/a> below.<\/p>\n

If a jau::function<\/a> contains no target, see jau::function<R(A…)>::is_null(), it is empty. Invoking the target of an empty jau::function<\/a> is a no-operation and has no side effects.<\/p>\n

jau::function<\/a> satisfies the requirements of CopyConstructible, CopyAssignable, MoveConstructible and MoveAssignable.<\/p>\n

 <\/p>\n

Compared to std::function<R(A...)><\/code>, jau::function<\/a><R(A...)><\/code><\/p>\n