don't forget to make "bool dismissed_" mutable, so that dismiss() can change it for "typedef const scoped_guard_impl& scoped_guard" Regards, yefeng --- In Boost-Users@y..., Jon Wang <webmaster@b...> wrote:

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This solution won't work, because you are storing a reference to a temporary object, which will cease to exist after the constructor

call.

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Then the destructor is accessing memory that has already been destructed and probably reused.

Sorry! A silly mistake here:-) Well, what I meant is

typedef const scoped_guard_impl& scoped_guard; // not "typedef scoped_guard_impl& scoped_guard;"

Then "a const reference initialized with a temporary value makes that temporary value live for the lifetime of the reference itself". Is this fine?

Jon