C++ Error Handling

rust,ignore

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

C++ functions declared to return a Result will catch any thrown exception on the C++ side and return it as an Err value to the calling Rust function.
If an exception is thrown from an extern "C++" function that is not declared by the CXX bridge to return Result, the program calls C++'s std::terminate. The behavior is equivalent to the same exception being thrown through a noexcept C++ function.

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