Struct ExampleMapDynamic 

pub struct ExampleMapDynamic {
    pub name: String,
    /* private fields */
}

This typemap provides the dynamic section.

Fields

name: String

Let’s let the name field be public.

Implementations

impl ExampleMapDynamic

pub fn new() -> Self

Construct a new typemap.

All fixed fields will have their specified default value. If there is a dynamic sectionb, it will be empty.

pub fn get_infallible<K: InfallibleKey<ExampleMapDynamic>>(&self) -> &K

Get a value from the typemap which is guaranteed to be present.

Your program won’t compile if it’s not. Compiles down to a simple field borrow.

pub fn get_infallible_mut<K: InfallibleKey<ExampleMapDynamic>>( &mut self, ) -> &mut K

get a mutable reference to a type guaranteed to be in the typemap.

If it’s not, your program won’t compile.

pub fn get<K: Any>(&self) -> Option<&K>

Try to get a type from the typemap.

pub fn get_mut<K: Any>(&mut self) -> Option<&mut K>

Try to get a mutable reference to a value in the typemap.

pub fn insert<K: Any>(&mut self, value: K) -> Result<Option<K>, ()>

Try to insert into the typemap.

Like the std collections, inserting a value that’s already in the map returns Some(old_value) and updates it. Errors if the typemap is fixed and the type provided isn’t present.

pub fn insert_infallible<K: InfallibleKey<Self>>( &mut self, value: K, ) -> Option<K>

Insert into the typemap where the key is known to be in the typemap at the type system level.

Trait Implementations

impl Default for ExampleMapDynamic

fn default() -> Self

Returns the “default value” for a type.

impl InfallibleKey<ExampleMapDynamic> for Filesystem

fn get_infallible(map: &ExampleMapDynamic) -> &Filesystem

fn get_infallible_mut(map: &mut ExampleMapDynamic) -> &mut Filesystem

fn insert_infallible(map: &mut ExampleMapDynamic, value: Self) -> Option<Self>

impl InfallibleKey<ExampleMapDynamic> for Metrics

fn get_infallible(map: &ExampleMapDynamic) -> &Metrics

fn get_infallible_mut(map: &mut ExampleMapDynamic) -> &mut Metrics

fn insert_infallible(map: &mut ExampleMapDynamic, value: Self) -> Option<Self>

impl InfallibleKey<ExampleMapDynamic> for String

fn get_infallible(map: &ExampleMapDynamic) -> &String

fn get_infallible_mut(map: &mut ExampleMapDynamic) -> &mut String

fn insert_infallible(map: &mut ExampleMapDynamic, value: Self) -> Option<Self>

impl InfallibleKey<ExampleMapDynamic> for Time

fn get_infallible(map: &ExampleMapDynamic) -> &Time

fn get_infallible_mut(map: &mut ExampleMapDynamic) -> &mut Time

fn insert_infallible(map: &mut ExampleMapDynamic, value: Self) -> Option<Self>