CPP namespace enhancement proposal

[stephan57160]

Scenario:

Use flapigen to generate JAVA & C++ bindings and library, as usual.

Observation:

Examples below are taken from android-example and cpp-example.

Java bingings are generated with a package name set to the application or library name (aka myapplication):

  prompt> cd android-example
  prompt> cargo build
  prompt> grep '^package' app/src/main/java/net/akaame/myapplication/*.java
  app/src/main/java/net/akaame/myapplication/InternalPointerMarker.java:package net.akaame.myapplication;
  app/src/main/java/net/akaame/myapplication/JNIReachabilityFence.java:package net.akaame.myapplication;
  app/src/main/java/net/akaame/myapplication/Session.java:package net.akaame.myapplication;
  prompt> 

C++ bindings are generated with a namespace always set to rust (or internal):

  prompt> grep '^namespace' cpp-part/rust-api/*.hpp
  cpp-part/rust-api/Foo_fwd.hpp:namespace rust {
  cpp-part/rust-api/Foo.hpp:namespace rust {
  cpp-part/rust-api/rust_foreign_slice_impl.hpp:namespace rust {
  cpp-part/rust-api/rust_foreign_vec_impl.hpp:namespace rust {
  cpp-part/rust-api/rust_slice_access.hpp:namespace rust {
  cpp-part/rust-api/rust_slice_tmpl.hpp:namespace rust {
  cpp-part/rust-api/rust_vec_access.hpp:namespace rust {
  cpp-part/rust-api/rust_vec_impl.hpp:namespace rust {
  cpp-part/rust-api/rust_vec_impl.hpp:namespace internal {
  prompt> 

Proposal:

From any RUST library, the namespace could have the name of the library, similarly to what is done in JAVA (forget the net.akaaname).

This would help to have 2 or more RUST libraries in the same C++ application (aka myapplication).

[Dushistov]

flapigen is just crate, it obviously have no idea about what is the crate name that you use. You can specify name of package with rust method, the same for c++.

[stephan57160]

Oh OK. The package name is given by build.rs in both examples.

Maybe, the C++ example could use MyLibrary or anything else than just rust, then ...