Add a comment justifying translating Rust's `bool` into C/C++ `bool`.
PiperOrigin-RevId: 501677933
diff --git a/cc_bindings_from_rs/bindings.rs b/cc_bindings_from_rs/bindings.rs
index d4575ca..4cf37c9 100644
--- a/cc_bindings_from_rs/bindings.rs
+++ b/cc_bindings_from_rs/bindings.rs
@@ -273,6 +273,10 @@
}
}
+ // https://rust-lang.github.io/unsafe-code-guidelines/layout/scalars.html#bool documents
+ // that "Rust's bool has the same layout as C17's _Bool". The details (e.g. size, valid
+ // bit patterns) are implementation-defined, but this is okay, because `bool` in the
+ // `extern "C"` functions in the generated `..._cc_api.h` will also be the C17's _Bool.
ty::TyKind::Bool => keyword(quote! { bool }),
// https://rust-lang.github.io/unsafe-code-guidelines/layout/scalars.html#fixed-width-floating-point-types
