[boost] Re: Moveable locks

From: Christopher Currie (codemonkey_at_[hidden])
Date: 2004-07-19 15:30:38

Eric Niebler wrote:

> This won't work. Try to compile this with Comeau online:

> You'll get:
> 
>   "ComeauTest.c", line 13: error: "scoped_lock::scoped_lock(const
>   scoped_lock &)",
>           required for copy that was eliminated, is inaccessible
>           scoped_lock l = lock_transfer();
>                       ^
> 
> Non-copyable types can't be initialized this way. The code I posted 
> earlier worked around this problem by enabling just enough move 
> semantics to allow a lock to be returned from a function, but nothing 
> else. The lock is still non-copyable.

*pouts* Well, fooey. Glad you got it working, though, I missed that 
post. My point still stands, I think the movable lock should be a 
separate type from the scoped lock, even if we implement minimal move 
semantics to support assignment initialziation.

Christopher

-- 
Christopher Currie <codemonkey_at_[hidden]>