Re:Why std::bind can’t be formally deprecated
by gpderetta on Monday July 03, 2017 @08:27AM
(#14687742)
Bind is a stripped down version of boost.lambda [1] which is a generalized DSL for arbitrary expressions. Boost.lambda had, among other things, ways to protected nested binds calls and introduce new scopes for placeholders.
Adding special magic for nested binds (which is used about 0% of the time) was, in hindsight, a big mistake, but when bind was designed and added to the standard, lambda expressions were many years away, so any syntactic sugar that would ease the pain of higher order programming was very welcome.
[1] Although I don't recall who came first. Likely boost.bind was first, then boost.lambda improved on it and some of the improvements were fed back into bind. In fact boost.bind still has some features that std::bind doesn't have (and viceversa).
Adding special magic for nested binds (which is used about 0% of the time) was, in hindsight, a big mistake, but when bind was designed and added to the standard, lambda expressions were many years away, so any syntactic sugar that would ease the pain of higher order programming was very welcome.
[1] Although I don't recall who came first. Likely boost.bind was first, then boost.lambda improved on it and some of the improvements were fed back into bind. In fact boost.bind still has some features that std::bind doesn't have (and viceversa).