[−][src]Struct evalexpr::EmptyContext
A context that returns None
for each identifier.
Trait Implementations
impl Context for EmptyContext
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fn get_value(&self, _identifier: &str) -> Option<&Value>
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fn get_function(&self, _identifier: &str) -> Option<&Function>
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fn set_value(
&mut self,
_identifier: String,
_value: Value
) -> EvalexprResult<()>
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&mut self,
_identifier: String,
_value: Value
) -> EvalexprResult<()>
fn set_function(
&mut self,
_identifier: String,
_function: Function
) -> EvalexprResult<()>
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&mut self,
_identifier: String,
_function: Function
) -> EvalexprResult<()>
Auto Trait Implementations
impl Send for EmptyContext
impl Sync for EmptyContext
impl Unpin for EmptyContext
impl RefUnwindSafe for EmptyContext
impl UnwindSafe for EmptyContext
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,