pub enum Handler {
    Map(Expr),
    Then(Expr),
    AndThen(Expr),
}
Expand description

map => expr, then => expr, and_then => expr

Variants§

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Map(Expr)

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Then(Expr)

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AndThen(Expr)

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impl Handler

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pub fn is_map(&self) -> bool

Returns true if handler is Map.

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pub fn is_then(&self) -> bool

Returns true if handler is Then.

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pub fn is_and_then(&self) -> bool

Returns true if handler is AndThen.

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pub fn peek_handler(input: ParseStream<'_>) -> bool

Returns true if next value in input ParseStream is the definition of Handler.

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pub fn extract_expr(&self) -> &Expr

Extracts inner expr.

Trait Implementations§

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impl<'a> TryFrom<&'a ParseBuffer<'a>> for Handler

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fn try_from(input: ParseStream<'a>) -> Result<Self>

Attempts to parse input as a handler.

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type Error = Error

The type returned in the event of a conversion error.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.