V Tue, 26 Jan 2016 05:47:42 +0000 Igor via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com> napsáno:
> On Tuesday, 26 January 2016 at 05:11:54 UTC, Mike Parker wrote: > > On Tuesday, 26 January 2016 at 01:09:50 UTC, Igor wrote: > >> Is there any examples that shows how to properly allocate an > >> object of a class type with the new allocators and then > >> release it when desired? > > > > Allocate a block of memory big enough to hold an instance of > > your class using whichever allocator you need, then instantiate > > a class instance with std.conv.emplace. > > > > http://p0nce.github.io/d-idioms/#Placement-new-with-emplace > > I created a class using this example. But my code is now failing. > It seems one can't just replace new with this and expect it to > work? > > What is happening is some fields(strings) are not retaining their > value. > > ubyte[__traits(classInstanceSize, App)] buffer; > auto app = cast(App)emplace!App(buffer[]); > //auto app = new App(); > > Basically the comment is the original. When I finally call > createWindow, it fails because the string representing the name > inside App is null... Which doesn't happen when I use new. > > Should it work as expected(which it isn't) or do I have to also > emplace all the fields and such so they are not for some reason > released? > Can you try it with GC.disable()?
