Struct WriteContext 

#[non_exhaustive]
pub struct WriteContext {
    pub principal: Option<Value>,
    pub group: Option<String>,
}

Built with WriteContext::new and the with_* builders, so a field added later (request data, say) doesn’t break existing hosts.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

principal: Option<Value>

The actor, as a CBOR map (name plus attributes).

group: Option<String>

Shared by every write one request or action run causes.

Implementations

impl WriteContext

pub fn new() -> Self

An empty context: no principal, no group.

pub fn with_principal(self, principal: Value) -> Self

pub fn with_group(self, group: impl Into<String>) -> Self

pub async fn scope<F: Future>(self, fut: F) -> F::Output

Run fut with this context in scope.

pub fn current() -> Option<WriteContext>

The context in scope for the current task, if any.

Trait Implementations

impl Clone for WriteContext

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WriteContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for WriteContext

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for WriteContext

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WriteContext