diff options
Diffstat (limited to 'vendor/miette/src/eyreish/ptr.rs')
-rw-r--r-- | vendor/miette/src/eyreish/ptr.rs | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/vendor/miette/src/eyreish/ptr.rs b/vendor/miette/src/eyreish/ptr.rs deleted file mode 100644 index fa954d1..0000000 --- a/vendor/miette/src/eyreish/ptr.rs +++ /dev/null @@ -1,188 +0,0 @@ -use std::{marker::PhantomData, ptr::NonNull}; - -#[repr(transparent)] -/// A raw pointer that owns its pointee -pub(crate) struct Own<T> -where - T: ?Sized, -{ - pub(crate) ptr: NonNull<T>, -} - -unsafe impl<T> Send for Own<T> where T: ?Sized {} -unsafe impl<T> Sync for Own<T> where T: ?Sized {} - -impl<T> Copy for Own<T> where T: ?Sized {} - -impl<T> Clone for Own<T> -where - T: ?Sized, -{ - fn clone(&self) -> Self { - *self - } -} - -impl<T> Own<T> -where - T: ?Sized, -{ - pub(crate) fn new(ptr: Box<T>) -> Self { - Own { - ptr: unsafe { NonNull::new_unchecked(Box::into_raw(ptr)) }, - } - } - - pub(crate) fn cast<U: CastTo>(self) -> Own<U::Target> { - Own { - ptr: self.ptr.cast(), - } - } - - pub(crate) unsafe fn boxed(self) -> Box<T> { - Box::from_raw(self.ptr.as_ptr()) - } - - pub(crate) const fn by_ref<'a>(&self) -> Ref<'a, T> { - Ref { - ptr: self.ptr, - lifetime: PhantomData, - } - } - - pub(crate) fn by_mut<'a>(self) -> Mut<'a, T> { - Mut { - ptr: self.ptr, - lifetime: PhantomData, - } - } -} - -#[allow(explicit_outlives_requirements)] -#[repr(transparent)] -/// A raw pointer that represents a shared borrow of its pointee -pub(crate) struct Ref<'a, T> -where - T: ?Sized, -{ - pub(crate) ptr: NonNull<T>, - lifetime: PhantomData<&'a T>, -} - -impl<'a, T> Copy for Ref<'a, T> where T: ?Sized {} - -impl<'a, T> Clone for Ref<'a, T> -where - T: ?Sized, -{ - fn clone(&self) -> Self { - *self - } -} - -impl<'a, T> Ref<'a, T> -where - T: ?Sized, -{ - pub(crate) fn new(ptr: &'a T) -> Self { - Ref { - ptr: NonNull::from(ptr), - lifetime: PhantomData, - } - } - - pub(crate) const fn from_raw(ptr: NonNull<T>) -> Self { - Ref { - ptr, - lifetime: PhantomData, - } - } - - pub(crate) fn cast<U: CastTo>(self) -> Ref<'a, U::Target> { - Ref { - ptr: self.ptr.cast(), - lifetime: PhantomData, - } - } - - pub(crate) fn by_mut(self) -> Mut<'a, T> { - Mut { - ptr: self.ptr, - lifetime: PhantomData, - } - } - - pub(crate) const fn as_ptr(self) -> *const T { - self.ptr.as_ptr() as *const T - } - - pub(crate) unsafe fn deref(self) -> &'a T { - &*self.ptr.as_ptr() - } -} - -#[allow(explicit_outlives_requirements)] -#[repr(transparent)] -/// A raw pointer that represents a unique borrow of its pointee -pub(crate) struct Mut<'a, T> -where - T: ?Sized, -{ - pub(crate) ptr: NonNull<T>, - lifetime: PhantomData<&'a mut T>, -} - -impl<'a, T> Copy for Mut<'a, T> where T: ?Sized {} - -impl<'a, T> Clone for Mut<'a, T> -where - T: ?Sized, -{ - fn clone(&self) -> Self { - *self - } -} - -impl<'a, T> Mut<'a, T> -where - T: ?Sized, -{ - pub(crate) fn cast<U: CastTo>(self) -> Mut<'a, U::Target> { - Mut { - ptr: self.ptr.cast(), - lifetime: PhantomData, - } - } - - pub(crate) const fn by_ref(self) -> Ref<'a, T> { - Ref { - ptr: self.ptr, - lifetime: PhantomData, - } - } - - pub(crate) fn extend<'b>(self) -> Mut<'b, T> { - Mut { - ptr: self.ptr, - lifetime: PhantomData, - } - } - - pub(crate) unsafe fn deref_mut(self) -> &'a mut T { - &mut *self.ptr.as_ptr() - } -} - -impl<'a, T> Mut<'a, T> { - pub(crate) unsafe fn read(self) -> T { - self.ptr.as_ptr().read() - } -} - -pub(crate) trait CastTo { - type Target; -} - -impl<T> CastTo for T { - type Target = T; -} |