JSNewEnumerateOp
syntax typedef bool (* jsnewenumerateop)(jscontext *cx, js::handleobject obj, js::autoidvector &properties); // added in spidermonkeysidebar 38 typedef bool (* jsnewenumerateop)(jscontext *cx, js::handleobject obj, jsiterateop enum_op, js::mutablehandlevalue statep, js::mutablehandleid idp); // obsolete since jsapi 37 name type description cx jscontext * the context in which the enumeration is taking place.
... properties js::autoidvector & out parameter.

JS::AutoVectorRooter
there are derived classes for the main types: class parent class js::autovaluevector autovectorrooter<value> js::autoidvector autovectorrooter<jsid> js::autoobjectvector added in spidermonkey 24 autovectorrooter<jsobject *> js::autofunctionvector added in spidermonkey 31 autovectorrooter<jsfunction *> js::autoscriptvector autovectorrooter<jsscript *> see also mxr id search for js::autovectorrooter mxr id search for js::autovaluevector mxr id search for js::autoidvector ...

JSAPI reference
entrootedstring added in spidermonkey 31 class js::persistentrootedsymbol added in spidermonkey 38 class js::persistentrootedid added in spidermonkey 31 class js::persistentrootedvalue added in spidermonkey 31 class js::autovaluearray<n> added in spidermonkey 31 class js::autovectorrooter<t> added in spidermonkey 17 class js::autovaluevector added in spidermonkey 17 class js::autoidvector added in spidermonkey 17 class js::autoobjectvector added in spidermonkey 24 class js::autofunctionvector added in spidermonkey 31 class js::autoscriptvector added in spidermonkey 17 class js::handlevaluearray added in spidermonkey 31 js::add*root added in spidermonkey 31 obsolete since jsapi 38 js::addvalueroot added in spidermonkey 31 obsolete since jsapi 38 js::add...