Struct ContextRef

pub struct ContextRef<'a> { /* private fields */ }

A mutable reference to a context being created or destroyed.

Implementations

impl ContextRef<'_>

pub fn parent(&self) -> Option<&Context>

Get the parent context of this context.

See Context::parent for more details.

pub fn extensions(&self) -> &Extensions

Get a read-only reference to the extensions of this context.

pub fn extensions_mut(&mut self) -> &mut Extensions

Get a mutable reference to the extensions of this context.

Examples found in repository

examples/basic.rs (line 31)

    fn on_new_context(&self, mut context: ContextRef<'_>, fields: Fields<'_>) {
        let foo_value = fields.get("foo").and_then(|value| value.as_bool());
        if let Some(foo_value) = foo_value {
            context.extensions_mut().insert(Foo(foo_value));
        }
    }

pub fn iter(&self) -> impl Iterator<Item = &Context>

Recursively iterate over this context’s parents.

Because the ContextRef is used before the context is created, and after it is destroyed, the iterator will not include the context itself.