Trait FromContext 

pub trait FromContext: Sized + FromContextBounds {
    // Required method
    fn from_context(ctx: &Context) -> impl ContextFutureBounds<Output = Self>;
}

Trait for extracting typed data from bot context

Similar to skyzen’s Extractor trait, this allows handlers to declare what data they need as function parameters.

Example

// Built-in extractors
async fn greet(user: User) -> String {
    format!("Hello, {}!", user.name)
}

async fn echo(args: CommandArgs) -> String {
    args.0
}

Required Methods

fn from_context(ctx: &Context) -> impl ContextFutureBounds<Output = Self>

Extract data from the context

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FromContext for ()

async fn from_context(_ctx: &Context) -> Self

impl<T1: FromContext> FromContext for (T1,)

async fn from_context(ctx: &Context) -> Self

impl<T1: FromContext, T2: FromContext> FromContext for (T1, T2)

async fn from_context(ctx: &Context) -> Self

impl<T1: FromContext, T2: FromContext, T3: FromContext> FromContext for (T1, T2, T3)

async fn from_context(ctx: &Context) -> Self

impl<T1: FromContext, T2: FromContext, T3: FromContext, T4: FromContext> FromContext for (T1, T2, T3, T4)

async fn from_context(ctx: &Context) -> Self

Implementors

impl FromContext for ButtonId

impl FromContext for Channel

impl FromContext for CommandArgs

impl FromContext for CommandName

impl FromContext for Context

Extract the full context (for advanced use cases)

impl FromContext for MessageContent

impl FromContext for Typing

impl FromContext for User