{"action":"created","comment":{"url":"https://api.github.com/repos/D-Programming-Language/dmd/pulls/comments/51126555","id":51126555,"diff_hunk":"@@ -1156,6 +1156,9 @@ public:\n                 structsize = Target.ptrsize * 2; // allow room for __vptr and __monitor\n         }\n \n+        // Add vptr's for any interfaces implemented by this class\n+        structsize += setBaseInterfaceOffsets(structsize);\n+","path":"src/dclass.d","position":6,"original_position":6,"commit_id":"316f2e900dc16ce1351a305c58bad287b2855ad5","original_commit_id":"316f2e900dc16ce1351a305c58bad287b2855ad5","user":{"login":"9rnsr","id":254394,"avatar_url":"https://avatars.githubusercontent.com/u/254394?v=3","gravatar_id":"","url":"https://api.github.com/users/9rnsr","html_url":"https://github.com/9rnsr","followers_url":"https://api.github.com/users/9rnsr/followers","following_url":"https://api.github.com/users/9rnsr/following{/other_user}","gists_url":"https://api.github.com/users/9rnsr/gists{/gist_id}","starred_url":"https://api.github.com/users/9rnsr/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/9rnsr/subscriptions","organizations_url":"https://api.github.com/users/9rnsr/orgs","repos_url":"https://api.github.com/users/9rnsr/repos","events_url":"https://api.github.com/users/9rnsr/events{/privacy}","received_events_url":"https://api.github.com/users/9rnsr/received_events","type":"User","site_admin":false},"body":"This change affects extern (D) class layout, not only for `extern (C++)`. Test case is:\r\n\r\n```d\r\nextern (D) //extern (C++)\r\n{\r\n    class Base\r\n    {\r\n        ~this() {}\r\n        size_t x = 4;\r\n    }\r\n\r\n    interface Interface\r\n    {\r\n        int Method();\r\n    }\r\n\r\n    class Derived : Base, Interface\r\n    {\r\n        size_t y = 5;\r\n        int Method() { return 3; }\r\n    }\r\n}\r\n\r\nvoid main()\r\n{\r\n    Derived d;                  // dmd 2.069             master\r\n    pragma(msg, d.x.offsetof);  // (void*).sizeof * 2\r\n    pragma(msg, d.y.offsetof);  // (void*).sizeof * 3 -> 4\r\n}\r\n```\r\n\r\nIs this intentional? If so, we should update [ABI page](http://dlang.org/spec/abi).","created_at":"2016-01-28T14:14:34Z","updated_at":"2016-01-28T14:14:34Z","html_url":"https://github.com/D-Programming-Language/dmd/pull/5361#discussion_r51126555","pull_request_url":"https://api.github.com/repos/D-Programming-Language/dmd/pulls/5361","_links":{"self":{"href":"https://api.github.com/repos/D-Programming-Language/dmd/pulls/comments/51126555"},"html":{"href":"https://github.com/D-Programming-Language/dmd/pull/5361#discussion_r51126555"},"pull_request":{"href":"https://api.github.com/repos/D-Programming-Language/dmd/pulls/5361"}}},"pull_request":{"url":"https://api.github.com/repos/D-Programming-Language/dmd/pulls/5361","id":56856513,"html_url":"https://github.com/D-Programming-Language/dmd/pull/5361","diff_url":"https://github.com/D-Programming-Language/dmd/pull/5361.diff","patch_url":"https://github.com/D-Programming-Language/dmd/pull/5361.patch","issue_url":"https://api.github.com/repos/D-Programming-Language/dmd/issues/5361","number":5361,"state":"closed","locked":false,"title":"fix Issue 15579 - extern(C++) interfaces/multiple-inheritance","user":{"login":"WalterBright","id":568298,"avatar_url":"https://avatars.githubusercontent.com/u/568298?v=3","gravatar_id":"","url":"https://api.github.com/users/WalterBright","html_url":"https://github.com/WalterBright","followers_url":"https://api.github.com/users/WalterBright/followers","following_url":"https://api.github.com/users/WalterBright/following{/other_user}","gists_url":"https://api.github.com/users/WalterBright/gists{/gist_id}","starred_url":"https://api.github.com/users/WalterBright/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/WalterBright/subscriptions","organizations_url":"https://api.github.com/users/WalterBright/orgs","repos_url":"https://api.github.com/users/WalterBright/repos","events_url":"https://api.github.com/users/WalterBright/events{/privacy}","received_events_url":"https://api.github.com/users/WalterBright/received_events","type":"User","site_admin":false},"body":"https://issues.dlang.org/show_bug.cgi?id=15579\r\n\r\nThe fix is to reorder when the _vptr member is 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