[][src]Struct sp_state_machine::ReadOnlyExternalities

pub struct ReadOnlyExternalities<'a, H: Hasher, B: 'a + Backend<H>> { /* fields omitted */ }

Simple read-only externalities for any backend.

To be used in test for state inspection. Will panic if something writes to the storage.

Implementations

impl<'a, H: Hasher, B: 'a + Backend<H>> ReadOnlyExternalities<'a, H, B>[src]

pub fn execute_with<R>(&mut self, f: impl FnOnce() -> R) -> R[src]

Execute the given closure while self is set as externalities.

Returns the result of the given closure.

Trait Implementations

impl<'a, H: Debug + Hasher, B: Debug + 'a + Backend<H>> Debug for ReadOnlyExternalities<'a, H, B>[src]

impl<'a, H: Hasher, B: 'a + Backend<H>> ExtensionStore for ReadOnlyExternalities<'a, H, B>[src]

impl<'a, H: Hasher, B: 'a + Backend<H>> Externalities for ReadOnlyExternalities<'a, H, B>[src]

impl<'a, H: Hasher, B: 'a + Backend<H>> From<&'a B> for ReadOnlyExternalities<'a, H, B>[src]

Auto Trait Implementations

impl<'a, H, B> RefUnwindSafe for ReadOnlyExternalities<'a, H, B> where
    B: RefUnwindSafe,
    H: RefUnwindSafe
[src]

impl<'a, H, B> Send for ReadOnlyExternalities<'a, H, B> where
    B: Sync
[src]

impl<'a, H, B> Sync for ReadOnlyExternalities<'a, H, B> where
    B: Sync
[src]

impl<'a, H, B> Unpin for ReadOnlyExternalities<'a, H, B> where
    H: Unpin
[src]

impl<'a, H, B> UnwindSafe for ReadOnlyExternalities<'a, H, B> where
    B: RefUnwindSafe,
    H: UnwindSafe
[src]

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T> Instrument for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, Outer> IsWrappedBy<Outer> for T where
    T: From<Outer>,
    Outer: AsRef<T> + AsMut<T> + From<T>, 
[src]

pub fn from_ref(outer: &Outer) -> &T[src]

Get a reference to the inner from the outer.

pub fn from_mut(outer: &mut Outer) -> &mut T[src]

Get a mutable reference to the inner from the outer.

impl<T> MaybeDebug for T where
    T: Debug
[src]

impl<T> MaybeDebug for T where
    T: Debug

impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

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

The type returned in the event of a conversion error.

impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>, 
[src]

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,