pub struct Repetition {
    pub kind: RepetitionKind,
    pub greedy: bool,
    pub hir: Box<Hir>,
}
Expand description

The high-level intermediate representation of a repetition operator.

A repetition operator permits the repetition of an arbitrary sub-expression.

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§kind: RepetitionKind

The kind of this repetition operator.

§greedy: bool

Whether this repetition operator is greedy or not. A greedy operator will match as much as it can. A non-greedy operator will match as little as it can.

Typically, operators are greedy by default and are only non-greedy when a ? suffix is used, e.g., (expr)* is greedy while (expr)*? is not. However, this can be inverted via the U “ungreedy” flag.

§hir: Box<Hir>

The expression being repeated.

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impl Repetition

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pub fn is_match_empty(&self) -> bool

Returns true if and only if this repetition operator makes it possible to match the empty string.

Note that this is not defined inductively. For example, while a* will report true, ()+ will not, even though () matches the empty string and one or more occurrences of something that matches the empty string will always match the empty string. In order to get the inductive definition, see the corresponding method on Hir.

Trait Implementations§

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impl Clone for Repetition

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fn clone(&self) -> Repetition

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Repetition

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq<Repetition> for Repetition

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fn eq(&self, other: &Repetition) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for Repetition

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impl StructuralEq for Repetition

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impl StructuralPartialEq for Repetition

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

const: unstable · source§

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> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.