Struct `Repetition`

pub struct Repetition { pub min: u32, pub max: Option<u32>, pub greedy: bool, pub sub: Box<Hir> }

The high-level intermediate representation of a repetition operator.

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

Fields

min: u32

The minimum range of the repetition.

Note that special cases like ?, + and * all get translated into the ranges {0,1}, {1,} and {0,}, respectively.

When min is zero, this expression can match the empty string regardless of what its sub-expression is.

max: Option<u32>

The maximum range of the repetition.

Note that when max is None, min acts as a lower bound but where there is no upper bound. For something like x{5} where the min and max are equivalent, min will be set to 5 and max will be set to Some(5).

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.

sub: Box<Hir>

The expression being repeated.

Implementations

`impl Repetition`

fn with(&self, sub: Hir) -> Repetition: Returns a new repetition with the same min, max and greedy values, but with its sub-expression replaced with the one given.

Trait Implementations

`impl Clone for Repetition`

fn clone(&self) -> Self

`impl Debug for Repetition`

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

`impl Eq for Repetition`

`impl PartialEq for Repetition`

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

`impl StructuralPartialEq for Repetition`

Auto Trait Implementations

`impl Freeze for Repetition`

`impl RefUnwindSafe for Repetition`

`impl Send for Repetition`

`impl Sync for Repetition`

`impl Unpin for Repetition`

`impl UnsafeUnpin for Repetition`

`impl UnwindSafe for Repetition`

Blanket Implementations

`impl<T> Any for Repetition where T: 'static + ?Sized,`

fn type_id(&self) -> TypeId

`impl<T> Borrow<T> for Repetition where T: ?Sized,`

fn borrow(&self) -> &T

`impl<T> BorrowMut<T> for Repetition where T: ?Sized,`

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

`impl<T> CloneToUninit for Repetition where T: Clone,`

unsafe fn clone_to_uninit(&self, dest: *mut u8)

`impl<T> From<T> for Repetition`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> ToOwned for Repetition where T: Clone,`

type Owned = T;
fn to_owned(&self) -> T
fn clone_into(&self, target: &mut T)

`impl<T, U> Into<U> for Repetition where U: From<T>,`

fn into(self) -> U

Calls U::from(self).

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

`impl<T, U> TryFrom<U> for Repetition where U: Into<T>,`

type Error = never;
fn try_from(value: U) -> Result<T, never>

`impl<T, U> TryInto<U> for Repetition where U: TryFrom<T>,`

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