OptionalCompilerObserver

snix_eval::observer

Struct OptionalCompilerObserver 

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pub struct OptionalCompilerObserver<'o>(pub Option<&'o mut dyn CompilerObserver>);
Expand description

Compiler observer that is optimised for the case where no observer is being used.

The trait RuntimeObserver is implemented on the Optional. This removes the dynamic dispatch overhead when no observer is being used.

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§0: Option<&'o mut dyn CompilerObserver>

Trait Implementations§

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impl<'o> CompilerObserver for OptionalCompilerObserver<'o>

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fn observe_compiled_toplevel(&mut self, lambda: &Rc<Lambda>)

Called when the compiler finishes compilation of the top-level of an expression (usually the root Nix expression of a file).
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fn observe_compiled_lambda(&mut self, lambda: &Rc<Lambda>)

Called when the compiler finishes compilation of a user-defined function. Read more
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fn observe_compiled_thunk(&mut self, lambda: &Rc<Lambda>)

Called when the compiler finishes compilation of a thunk.
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impl<'o> Default for OptionalCompilerObserver<'o>

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fn default() -> OptionalCompilerObserver<'o>

Returns the “default value” for a type. Read more
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impl<'o> From<&'o mut dyn CompilerObserver> for OptionalCompilerObserver<'o>

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fn from(val: &'o mut dyn CompilerObserver) -> Self

Converts to this type from the input type.
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impl<'o> From<Option<&'o mut dyn CompilerObserver>> for OptionalCompilerObserver<'o>

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fn from(val: Option<&'o mut dyn CompilerObserver>) -> Self

Converts to this type from the input type.

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impl<T> Any for T
where 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 T
where T: ?Sized,

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fn borrow(&self) -> &T

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

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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 T
where U: From<T>,

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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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 T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V