Struct holochain_types::prelude::dependencies::subtle::Choice [−][src]
pub struct Choice(_);
Expand description
The Choice
struct represents a choice for use in conditional assignment.
It is a wrapper around a u8
, which should have the value either 1
(true)
or 0
(false).
The conversion from u8
to Choice
passes the value through an optimization
barrier, as a best-effort attempt to prevent the compiler from inferring that
the Choice
value is a boolean. This strategy is based on Tim Maclean’s
work on rust-timing-shield
, which attempts to provide
a more comprehensive approach for preventing software side-channels in Rust
code.
The Choice
struct implements operators for AND, OR, XOR, and NOT, to allow
combining Choice
values. These operations do not short-circuit.
Implementations
Trait Implementations
Performs the &=
operation. Read more
Performs the |=
operation. Read more
Performs the ^=
operation. Read more
Auto Trait Implementations
impl RefUnwindSafe for Choice
impl UnwindSafe for Choice
Blanket Implementations
fn type_id_compat(&self) -> TypeId
fn type_id_compat(&self) -> TypeId
TODO: once 1.33.0 is the minimum supported compiler version, remove Any::type_id_compat and use StdAny::type_id instead. https://github.com/rust-lang/rust/issues/27745 Read more
Mutably borrows from an owned value. Read more
fn with_context(self, otel_cx: Context) -> WithContext<Self>
fn with_context(self, otel_cx: Context) -> WithContext<Self>
fn with_current_context(self) -> WithContext<Self>
fn with_current_context(self) -> WithContext<Self>
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more