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//! Traits for common operations on C++ vectors. /// Provides access to the underlying memory buffer. pub trait Data { /// Return type of `data()` function. type Output; /// Returns a pointer to the underlying memory buffer. /// /// # Safety /// /// The caller must make sure `self` contains a valid pointer. This function /// may invoke arbitrary foreign code, so no safety guarantees can be made. unsafe fn data(&self) -> Self::Output; } /// Provides mutable access to the underlying memory buffer. pub trait DataMut { /// Return type of `data_mut()` function. type Output; /// Returns a pointer to the underlying memory buffer. /// /// # Safety /// /// The caller must make sure `self` contains a valid pointer. This function /// may invoke arbitrary foreign code, so no safety guarantees can be made. unsafe fn data_mut(&self) -> Self::Output; } /// Provides access to the size of the collection. pub trait Size { /// Returns number of the elements in the underlying buffer. /// /// # Safety /// /// The caller must make sure `self` contains a valid pointer. This function /// may invoke arbitrary foreign code, so no safety guarantees can be made. unsafe fn size(&self) -> usize; }