Shared Enums

rust,ignore

# // Copyright 2023 Google LLC
# // SPDX-License-Identifier: Apache-2.0
#
{{#include ../../../../third_party/cxx/book/snippets.rs:shared_enums_bridge}}

Generated Rust:

rust

# // Copyright 2023 Google LLC
# // SPDX-License-Identifier: Apache-2.0
#
{{#include ../../../../third_party/cxx/book/snippets.rs:shared_enums_rust}}

Generated C++:

c++

{{#include ../../../../third_party/cxx/book/snippets.cc:shared_enums_cpp}}

On the Rust side, the code generated for shared enums is actually a struct wrapping a numeric value. This is because it is not UB in C++ for an enum class to hold a value different from all of the listed variants, and our Rust representation needs to have the same behavior.

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