[−][src]Enum prometheus_parser::Expression
A root expression node.
These are all valid root expression types.
Variants
Float(f64)
A single scalar float
String(String)
A single scalar string.
Prometheus' docs claim strings aren't currently implemented, but they're valid as function arguments.
Selector(Selector)
A metric selector
Group(Group)
A grouped expression wrapped in parentheses
Function(Function)
A function call
Operator(Operator)
A binary operator expression
Methods
impl Expression
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pub fn group(self) -> Expression
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Wraps this Expression in a Group, consuming this Expression but returning an owned Group.
pub fn return_value(&self) -> ReturnValue
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Determines a predicted ReturnValue
for this Expression. A ReturnValue
includes a predicted data type and a set of label operations that may
affect which labels are returned.
pub fn as_f64(&self) -> Option<f64>
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If this Expression is a Float, returns its value. Otherwise, returns None.
pub fn as_str(&self) -> Option<&str>
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If this Expression is a String, returns its value. Otherwise, returns None.
Trait Implementations
impl Clone for Expression
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fn clone(&self) -> Expression
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fn clone_from(&mut self, source: &Self)
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impl Debug for Expression
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impl Display for Expression
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impl PartialEq<Expression> for Expression
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fn eq(&self, other: &Expression) -> bool
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fn ne(&self, other: &Expression) -> bool
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impl StructuralPartialEq for Expression
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Auto Trait Implementations
impl RefUnwindSafe for Expression
impl Send for Expression
impl Sync for Expression
impl Unpin for Expression
impl UnwindSafe for Expression
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
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> 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> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
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>,