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Bug 23017 – C++ class may not derive from D class

Status: RESOLVED
Resolution: FIXED
Severity: normal
Priority: P1
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2022-04-14T20:42:22Z
Last change time: 2022-04-17T23:17:35Z
Keywords: pull
Assigned to: No Owner
Creator: naydef

Comments

Comment #0 by naydef — 2022-04-14T20:42:22Z

Code: ``` class Parent { } extern(C++) class Child : Parent { } ``` This code crashes LDC. The response was this code is invalid and should be rejected. https://github.com/ldc-developers/ldc/issues/3959

Comment #1 by dkorpel — 2022-04-15T08:46:09Z

It's indeed not valid: https://dlang.org/spec/cpp_interface.html#classes > Unlike classes and interfaces with D linkage, extern (C++) classes and interfaces are not rooted in Object and cannot be used with typeid.

Comment #2 by dlang-bot — 2022-04-15T08:48:50Z

@dkorpel created dlang/dmd pull request #13984 "Fix issue 23017 - C++ class may not derive from D class" fixing this issue: - Fix issue 23017 - C++ class may not derive from D class https://github.com/dlang/dmd/pull/13984

Comment #3 by dlang-bot — 2022-04-17T23:17:35Z

dlang/dmd pull request #13984 "Fix issue 23017 - C++ class may not derive from D class" was merged into master: - 06d9c42d52ab05e8eaecbd18468acce352b255c3 by Dennis Korpel: Fix issue 23017 - C++ class may not derive from D class https://github.com/dlang/dmd/pull/13984