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Bug 961325: Give PersistentRooted a copy constructor that can take a 'const' original. r=terrence

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This commit is contained in:
Jim Blandy 2014-06-23 12:59:19 -07:00
parent 2507e06387
commit 7253057ce9
1 changed files with 5 additions and 2 deletions
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7
js/public/RootingAPI.h
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@ -1138,7 +1138,7 @@ class PersistentRooted : private mozilla::LinkedListElement<PersistentRooted<T>
registerWithRuntime(rt);
}
PersistentRooted(PersistentRooted &rhs)
PersistentRooted(const PersistentRooted &rhs)
: mozilla::LinkedListElement<PersistentRooted<T> >(),
ptr(rhs.ptr)
{
@ -1146,8 +1146,11 @@ class PersistentRooted : private mozilla::LinkedListElement<PersistentRooted<T>
* Copy construction takes advantage of the fact that the original
* is already inserted, and simply adds itself to whatever list the
* original was on - no JSRuntime pointer needed.
*
* This requires mutating rhs's links, but those should be 'mutable'
* anyway. C++ doesn't let us declare mutable base classes.
*/
rhs.setNext(this);
const_cast<PersistentRooted &>(rhs).setNext(this);
}
/*