digitalmars.D.learn - Structs on the heap and destructors.
- John Colvin (31/31) Feb 18 2015 using DMD git HEAD
- Adam D. Ruppe (8/9) Feb 18 2015 That'll never happen; B is still valid until after A is
using DMD git HEAD struct A { B* b; ~this() { doStuff(); } } struct B { ~this() { doOtherStuff(); } } example usage: void main() { A a; a.b = new B; } Requirements: doOtherStuff must be called before doStuff. doOtherStuff and doStuff must be called exactly once each. Possible solution: insert a b.__dtor(); before doStuff. Unfortunately b.__dtor() is called again on exit (by the GC I assume). doOtherStuff can be guarded with a flag to prevent this. b.destroy() doesn't seem to actually call B.__dtor(). Is there a "right" way to do this?
Feb 18 2015
On Wednesday, 18 February 2015 at 15:22:47 UTC, John Colvin wrote:doOtherStuff must be called before doStuff.That'll never happen; B is still valid until after A is destroyed, if they weren't on the heap you'd see doStuff goes first too. You should probably make a method to clean B up yourself, I wouldn't even use the destructor, just a regular like "dispose" method that you can guard with a flag. I think that's the best way to do it.
Feb 18 2015