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| -rw-r--r-- | book/src/cpp.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/book/src/cpp.md b/book/src/cpp.md index 1be7a8a7..75ef8554 100644 --- a/book/src/cpp.md +++ b/book/src/cpp.md @@ -71,3 +71,8 @@ cannot translate into Rust: generate undefined behaviour. See [the tracking issue for exceptions](https://github.com/rust-lang/rust-bindgen/issues/1208) for more details. + +* Return value optimization. C++ compilers will in certain circumstances optimize functions + returning a struct type value to instead take an extra hidden argument that refers + to the return value struct. `bindgen` cannot necessarily know about this optimization and + thus at present `bindgen`-interfaces for these kinds of functions are invalid. |