JDK-8248433 : Use C++11 forward declared enum to move CollectedHeap::named_heap
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 16
  • Priority: P4
  • Status: Closed
  • Resolution: Not an Issue
  • Submitted: 2020-06-27
  • Updated: 2020-12-07
  • Resolved: 2020-12-07
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Related Reports
Blocks :  
JDK-8208089 - JEP 347: Enable C++14 Language Features
Description
JDK-8247740 added CollectedHeap::named_heap, a protected helper function for accessing derived heap objects.  Because it takes the CollectedHeap::Name of the intended collector, for error checking purposes, it had to be declared after the definition of the Name enum.  This resulted in multiple public/protected transitions.  C++11 permits forward declaration of enums, which would permit reordering.

While we're at it, the Name enum should be a scoped enum.