AgreeR

vstd_extra::resource::pcm::agree

Enum AgreeR

pub enum AgreeR<A> {
    Unit,
    Agree(A),
    AgreeInvalid,
}

Expand description

Agreement PCM

In modern Iris, it uses CMRA instead of PCM, which uses a core for every element instead of a unit element. Here we add a unit element to stick to the PCM definition.

Variants§

Unit

Agree(A)

Agreement on a value.

AgreeInvalid

Invalid state.

Implementations§

impl<A> AgreeR<A>

pub fn arrow_0(self) -> A

pub fn arrow_Agree_0(self) -> A

Trait Implementations§

impl<A: PartialEq> PCM for AgreeR<A>

open spec fn valid(self) -> bool

{ self !is AgreeInvalid }

open spec fn op(self, other: Self) -> Self

{
    match (self, other) {
        (AgreeR::Unit, x) => x,
        (x, AgreeR::Unit) => x,
        (AgreeR::Agree(a), AgreeR::Agree(b)) => {
            if a == b { AgreeR::Agree(a) } else { AgreeR::AgreeInvalid }
        }
        _ => AgreeR::AgreeInvalid,
    }
}

Composition: two agreeing values must be equal.

open spec fn unit() -> Self

{ AgreeR::Unit }

proof fn closed_under_incl(a: Self, b: Self)

proof fn commutative(a: Self, b: Self)

proof fn associative(a: Self, b: Self, c: Self)

proof fn op_unit(a: Self)

proof fn unit_valid()

Auto Trait Implementations§

impl<A> Freeze for AgreeR<A>
where A: Freeze,

impl<A> RefUnwindSafe for AgreeR<A>
where A: RefUnwindSafe,

impl<A> Send for AgreeR<A>
where A: Send,

impl<A> Sync for AgreeR<A>
where A: Sync,

impl<A> Unpin for AgreeR<A>
where A: Unpin,

impl<A> UnwindSafe for AgreeR<A>
where A: 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> 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, 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>