llvm_quick 181.0.0-alpha.7

Rust's wrapper for llvm.
Documentation 
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use std::fmt::{Debug, Formatter};
use std::mem::forget;
use std::ops::Deref;
use std::ptr::NonNull;

use crate::Opaque;

pub trait OpaqueDrop {
    unsafe fn drop_raw(ptr: *mut Self);
}

pub trait OpaqueClone {
    unsafe fn clone_raw(ptr: *mut Self) -> *mut Self;
}

pub struct Owning<T: Opaque<Inner: OpaqueDrop>> {
    ptr: NonNull<T>,
}

impl<T: Opaque<Inner: OpaqueDrop + OpaqueClone>> Clone for Owning<T> {
    fn clone(&self) -> Self {
        unsafe { Self::from_raw(T::Inner::clone_raw(self.as_raw())) }
    }
}

impl<T: Opaque<Inner: OpaqueDrop>> Drop for Owning<T> {
    fn drop(&mut self) {
        unsafe { T::Inner::drop_raw(self.as_raw()) }
    }
}

impl<T: Opaque<Inner: OpaqueDrop>> Deref for Owning<T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        unsafe { self.ptr.as_ref() }
    }
}

impl<T: Opaque<Inner: OpaqueDrop> + Debug> Debug for Owning<T> {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        Debug::fmt(self.deref(), f)
    }
}

impl<T: Opaque<Inner: OpaqueDrop>> Owning<T> {
    pub unsafe fn from_ptr(ptr: *mut T::Inner) -> Option<Self> {
        if ptr.is_null() {
            None
        } else {
            unsafe { Some(Self::from_raw(ptr)) }
        }
    }

    pub unsafe fn from_raw(ptr: *mut T::Inner) -> Self {
        unsafe {
            Self {
                ptr: T::from_raw(ptr).into(),
            }
        }
    }

    pub fn into_raw(self) -> *mut T::Inner {
        let ptr = self.as_raw();
        forget(self);
        ptr
    }
}