digitalmars.D.bugs - [Issue 21524] New: [internal] Remove extern(C++) from all dmd
- d-bugmail puremagic.com (35/35) Jan 04 2021 https://issues.dlang.org/show_bug.cgi?id=21524
https://issues.dlang.org/show_bug.cgi?id=21524 Issue ID: 21524 Summary: [internal] Remove extern(C++) from all dmd functions and data structures Product: D Version: D2 Hardware: Other OS: Other Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nobody puremagic.com Reporter: ibuclaw gdcproject.org DMD's internal API is unstable and very few people remember there are downstream C++ users of the compiler who rely on the headers being in sync. There have been arguments over the best way forward to ensure that all contributors relieve the burden on gdc and ldc maintainers when making changes to dmd. As a compromise, one proposal would be to remove all use of extern(C++) from the Compiler API. In its place would be a single module defining a stable interface for C++. No attempt is made here to give any idealised view of what such a stable interface should look like, but to give one style as an example: extern(C++) struct DMDType(T) { T impl; // pointer const(char)* toChars() { return impl.toChars(); } StorageClass storage_class() { return impl.storage_class; } BEtype* ctype() { return impl.ctype; } //... } Which will also come with helpers to deal with the initial wrapping of AST nodes from the D types to C++ types. --
Jan 04 2021