Struct ManualReply

pub struct ManualReply<T: ?Sized>(/* private fields */);

Pretends to have the Candid type T, but unconditionally errors when serialized.

Usable, but not required, as metadata when using #[query(manual_reply = true)], so an accurate Candid file can still be generated.

Implementations

impl<T: ?Sized> ManualReply<T>

pub const fn empty() -> Self

Constructs a new ManualReply.

pub fn all<U>(value: U) -> Self

where U: ArgumentEncoder,

Replies with the given value and returns a new ManualReply, for a useful reply-then-return shortcut.

pub fn one<U>(value: U) -> Self

where U: CandidType,

Replies with a one-element tuple around the given value and returns a new ManualReply, for a useful reply-then-return shortcut.

pub fn reject(message: impl AsRef<str>) -> Self

Rejects the call with the specified message and returns a new ManualReply, for a useful reply-then-return shortcut.

Trait Implementations

impl<T> CandidType for ManualReply<T>

where T: CandidType + ?Sized,

fn idl_serialize<S>(&self, _: S) -> Result<(), S::Error>

where S: Serializer,

Unconditionally errors.

fn _ty() -> Type

fn ty() -> Type

fn id() -> TypeId

impl<T: Clone + ?Sized> Clone for ManualReply<T>

fn clone(&self) -> ManualReply<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + ?Sized> Debug for ManualReply<T>

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

Formats the value using the given formatter.

impl<T: Default + ?Sized> Default for ManualReply<T>

fn default() -> ManualReply<T>

Returns the “default value” for a type.

impl<T: Copy + ?Sized> Copy for ManualReply<T>