Preventing the Derivation of Copy and Clone (original) (raw)

The bindgen User Guide

Preventing the Derivation of Copy and Clone

bindgen will attempt to derive the Copy and Clone traits on a best-effort basis. Sometimes, it might not understand that although adding #[derive(Copy, Clone)] to a translated type definition will compile, it still shouldn't do that for reasons it can't know. In these cases, the nocopy annotation can be used to prevent bindgen to autoderive the Copy and Clone traits for a type.

Library

• bindgen::Builder::no_copy

Command Line

• --no-copy <regex>

Annotations

/**
 * Although bindgen can't know, this struct is not safe to move because pthread
 * mutexes can't move in memory!
 *
 * <div rustbindgen nocopy></div>
 */
struct MyMutexWrapper {
    pthread_mutex_t raw;
    // ...
};