John Maddock wrote:
Right now, the following code will not compile for me: typename aligned_storage < sizeof ( MyClass ) >::type storage; this was formerly: aligned_storage < sizeof ( MyClass ) > storage; but I added the ::type after reading the above message. Am I doing something wrong, or do I just need an up to date version of the library?
I am using VC 7.1 and get the error: error C2039: 'MyClass' : is not a member of 'boost::aligned_storage<size_>'
OK, lets take this a step at a time:
1) You didn't need to change anything, the whole point was that no existing code should break.
Ok, I was just thinking that using aligned_storage instead of aligned_storage::type might have been an invalid usage from the beginning (I probably should have tracked down the documentation).
2) The code you posted above should non-the-less compile. Are you using the latest cvs?
No I wasn't. I am now, and the problem has gone away :) However, I am worried that people who still have the old version of aligned_storage may be unable to test my singleton library when it comes up for review. It appears that aligned storage itself is not a POD, so the ::type is necessary. Should I package the new version of aligned_storage with the singleton zip so that testers will not run into problems?
The error message also looks strange: 'MyClass' is not a member of aligned_storage after all!
My mistake, that should read: error C2039: 'type' : is not a member of 'boost::aligned_storage<size_>' I was trying to translate a more complex use case and error message to a simpler one, which I should have compiled independently. -Jason