digitalmars.D.learn - Interfacing with C - calling member function of D struct from C?
- unleashy (16/16) Jun 24 2017 Hello! If I have a D struct like:
- Adam D. Ruppe (16/17) Jun 24 2017 You don't. Instead write it like:
- unleashy (2/19) Jun 25 2017 Thank you, this is what I suspected :)
Hello! If I have a D struct like: struct Foo { int bar; void addToBar(int what) { bar += what; } } How would I call `addToBar` from C code? Would I need to put the `addToBar` function outside of the struct and mark it as `extern (C)` and in normal D code take advantage of UFCS or is there some magic C incantation? I've scoured the forums and other places for anything about this but couldn't find any information whatsoever... so yeah. (or my Google-fu is terrible) Thanks!
Jun 24 2017
On Sunday, 25 June 2017 at 02:05:35 UTC, unleashy wrote:How would I call `addToBar` from C code?You don't. Instead write it like: struct Foo { int bar; } extern(C) void addToBar(Foo* foo, int what) { foo.bar += what; } Then define it in C the same way and you call it the normal way from C. But from D, you can UFCS call it: Foo* foo = new Foo(); foo.addToBar(5); // cool though I'd prolly just call it from D the same way you do from C too.
Jun 24 2017
On Sunday, 25 June 2017 at 02:09:53 UTC, Adam D. Ruppe wrote:On Sunday, 25 June 2017 at 02:05:35 UTC, unleashy wrote:Thank you, this is what I suspected :)How would I call `addToBar` from C code?You don't. Instead write it like: struct Foo { int bar; } extern(C) void addToBar(Foo* foo, int what) { foo.bar += what; } Then define it in C the same way and you call it the normal way from C. But from D, you can UFCS call it: Foo* foo = new Foo(); foo.addToBar(5); // cool though I'd prolly just call it from D the same way you do from C too.
Jun 25 2017