[Issue 18363] New: we should autogenerate duplicate “.h” header files in dmd to keep them in sync

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18363

          Issue ID: 18363
           Summary: we should autogenerate duplicate “.h” header files in
                    dmd to keep them in sync
           Product: D
           Version: D2
          Hardware: x86
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: timothee.cour2 at gmail.com

eg src/dmd/init.d vs src/dmd/init.h

* dtoh was reverted (https://github.com/dlang/tools/pull/125)

related: https://issues.dlang.org/show_bug.cgi?id=9285 Issue 9285 - dtoh
utility - convert D files to C++ header files (but that was not specific to
header files in dmd sources)

* https://github.com/dlang/dmd/pull/5082 [WIP] Generate C++ header files from
public extern (C++) declarations 

that was started on sept 2015

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