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ReprPtr

vstd_extra::cast_ptr

Struct ReprPtr

pub struct ReprPtr<R, T: Repr<R>> {
    pub ptr: PPtr<R>,
    pub _T: PhantomData<T>,
}

Expand description

Concrete representation of a pointer to an object of type T with representation type R The length of the array is not stored in the pointer

Fields§

§ptr: PPtr<R>§_T: PhantomData<T>

Implementations§

impl<R, T: Repr<R>> ReprPtr<R, T>

pub open spec fn new_spec(ptr: PPtr<R>) -> Self

{ Self { ptr: ptr, _T: PhantomData } }

pub exec fn new_borrowed<'a>(ptr: &'a PPtr<R>) -> res : &'a Self

ensures

*res == Self::new_spec(*ptr),

pub exec fn from_pptr(ptr: PPtr<R>) -> res : Self

ensures

res == Self::new_spec(ptr),

res.addr() == ptr.addr(),

res.ptr == ptr,

pub open spec fn to_pptr(self) -> PPtr<R>

{ self.ptr }

pub open spec fn addr_spec(self) -> usize

{ self.ptr.addr() }

pub exec fn addr(self) -> u : usize

returns

self.addr_spec(),

pub exec fn take(self, Tracked(perm): Tracked<&mut PointsTo<R, T>>) -> v : T

requires

old(perm).pptr() == self,

old(perm).is_init(),

old(perm).wf(&old(perm).inner_perms),

ensures

final(perm).pptr() == old(perm).pptr(),

final(perm).mem_contents() == MemContents::Uninit::<T>,

v == old(perm).value(),

pub exec fn put(self, Tracked(perm): Tracked<&mut PointsTo<R, T>>, v: T)

requires

old(perm).pptr() == self,

old(perm).mem_contents() == MemContents::Uninit::<T>,

ensures

final(perm).pptr() == old(perm).pptr(),

final(perm).mem_contents() == MemContents::Init(v),

final(perm).wf(&final(perm).inner_perms),

pub exec fn borrow<'a>(self, Tracked(perm): Tracked<&'a PointsTo<R, T>>) -> v : &'a T

requires

perm.pptr() == self,

perm.is_init(),

perm.wf(&perm.inner_perms),

ensures

*v === perm.value(),

pub exec fn borrow_mut<'a>( self, verus_tmp_perm: Tracked<&'a mut PointsTo<R, T>>, ) -> v : &'a mut T

requires

old(perm).pptr() == self,

old(perm).is_init(),

old(perm).wf(&old(perm).inner_perms),

ensures

*v == old(perm).value(),

final(perm).pptr() == old(perm).pptr(),

final(perm).is_init(),

final(perm).wf(&final(perm).inner_perms),

Borrows the pointed-to T mutably for the lifetime of perm.

While the returned borrow is live, perm is exclusively held and cannot be used. Mutations made through *v are not tracked by the Verus model: the postcondition only promises the final perm is still initialised and well-formed. Callers must preserve any invariants beyond that themselves.

Trait Implementations§

impl<R, T: Repr<R>> Clone for ReprPtr<R, T>

exec fn clone(&self) -> Self

1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl<R, T: Repr<R>> From<PPtr<R>> for ReprPtr<R, T>

exec fn from(ptr: PPtr<R>) -> Self

impl<R, T: Repr<R>> From<ReprPtr<R, T>> for PPtr<R>

exec fn from(ptr: ReprPtr<R, T>) -> Self

impl<R, T: Repr<R>> FromSpecImpl<PPtr<R>> for ReprPtr<R, T>

open spec fn obeys_from_spec() -> bool

{ true }

open spec fn from_spec(ptr: PPtr<R>) -> Self

{ Self { ptr: ptr, _T: PhantomData } }

impl<R, T: Repr<R>> FromSpecImpl<ReprPtr<R, T>> for PPtr<R>

open spec fn obeys_from_spec() -> bool

{ true }

open spec fn from_spec(ptr: ReprPtr<R, T>) -> Self

{ ptr.ptr }

impl<R, T: Repr<R>> Copy for ReprPtr<R, T>

Auto Trait Implementations§

impl<R, T> Freeze for ReprPtr<R, T>

impl<R, T> RefUnwindSafe for ReprPtr<R, T>
where T: RefUnwindSafe, R: RefUnwindSafe,

impl<R, T> Send for ReprPtr<R, T>
where T: Send, R: Send,

impl<R, T> Sync for ReprPtr<R, T>
where T: Sync, R: Sync,

impl<R, T> Unpin for ReprPtr<R, T>
where T: Unpin, R: Unpin,

impl<R, T> UnsafeUnpin for ReprPtr<R, T>

impl<R, T> UnwindSafe for ReprPtr<R, T>
where T: UnwindSafe, R: UnwindSafe,

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, VERUS_SPEC__A> FromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: From<T>,

fn obeys_from_spec() -> bool

fn from_spec(v: T) -> VERUS_SPEC__A

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, VERUS_SPEC__A> IntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: Into<T>,

fn obeys_into_spec() -> bool

fn into_spec(self) -> T

impl<T, U> IntoSpecImpl<U> for T
where U: From<T>,

fn obeys_into_spec() -> bool

fn into_spec(self) -> U

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, VERUS_SPEC__A> TryFromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryFrom<T>,

fn obeys_try_from_spec() -> bool

fn try_from_spec( v: T, ) -> Result<VERUS_SPEC__A, <VERUS_SPEC__A as TryFrom<T>>::Error>

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T, VERUS_SPEC__A> TryIntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryInto<T>,

fn obeys_try_into_spec() -> bool

fn try_into_spec(self) -> Result<T, <VERUS_SPEC__A as TryInto<T>>::Error>

impl<T, U> TryIntoSpecImpl<U> for T
where U: TryFrom<T>,

fn obeys_try_into_spec() -> bool

fn try_into_spec(self) -> Result<U, <U as TryFrom<T>>::Error>