fn_bnf

Struct While

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pub struct While<F, T> { /* private fields */ }
Expand description

Takes input until a given function fails.

§Example

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number: &'input str = While::from(char::is_ascii_digit)

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impl<T, F: Fn(&T) -> bool> While<F, T>

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pub fn from(func: F) -> Self

Creates a While rule from a function.

Trait Implementations§

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impl<F: Clone, T: Clone> Clone for While<F, T>

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fn clone(&self) -> While<F, T>

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<F: Debug, T: Debug> Debug for While<F, T>

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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<F, T> NamedRule for While<F, T>

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fn name(&self) -> Option<&'static str>

Defines the name printed in errors including this rule.
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impl<F: PartialEq, T: PartialEq> PartialEq for While<F, T>

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fn eq(&self, other: &While<F, T>) -> bool

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'input, T: 'input, F: Fn(&T) -> bool> Rule<'input, [T]> for While<F, T>

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type Output = &'input [T]

The type of the value of a successful parse of this rule.
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fn parse_at<'cursor, 'this, 'index>( &'this self, input: &'cursor mut &'input [T], index: &'index mut usize, ) -> Result<Self::Output, ParseError>
where 'input: 'this,

Parses a rule at a given index with a given input. Read more
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fn parse<'this>( &'this self, input: &'input SliceType, ) -> Result<(&'input SliceType, Self::Output), ParseError>
where 'input: 'this,

Parses a given rule at the start of some input. Read more
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fn map_parsed<Output, F: Fn(Self::Output) -> Output>( self, function: F, ) -> Map<'input, SliceType, Self, Output, F>
where Self: Sized,

Maps an infallible function onto the output of a rule.
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fn try_map_parsed<Output, E: Error + 'static, F: Fn(Self::Output) -> Result<Output, E>>( self, function: F, ) -> TryMap<'input, SliceType, Self, Output, E, F>
where Self: Sized,

Maps a function onto the output of a rule, passing the error back if it fails.
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fn prevent(self) -> Not<Self>
where Self: Sized,

Matches when this fails, and vice versa.
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fn repeat_for<const REPS: usize>( self, ) -> RepeatFor<'input, SliceType, Self, REPS>
where Self: Sized,

Repeats this rule a known amount of times.
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fn repeat(self, reps: usize) -> Repeat<'input, SliceType, Self>
where Self: Sized,

Repeats this rule a set amount of times.
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fn take(self, at_most: usize) -> Many<'input, SliceType, Self>
where Self: Sized,

Repeats this rule at most a set amount of times.
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fn hoard(self) -> Many<'input, SliceType, Self>
where Self: Sized,

Repeats this rule forever until it fails.
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fn spanned(self) -> Spanned<'input, SliceType, Self>
where Self: Sized, SliceType: Index<RangeTo<usize>, Output = SliceType>,

Captures the output and span of this rule, returning them along with the output in a Span.
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fn attempt(self) -> Attempt<'input, SliceType, Self>
where Self: Sized,

Tries to capture this rule, returning None if it doesn’t match.
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impl<'input, F: Fn(&char) -> bool> Rule<'input, str> for While<F, char>

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type Output = &'input str

The type of the value of a successful parse of this rule.
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fn parse_at<'cursor, 'this, 'index>( &'this self, input: &'cursor mut &'input str, index: &'index mut usize, ) -> Result<Self::Output, ParseError>
where 'input: 'this,

Parses a rule at a given index with a given input. Read more
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fn parse<'this>( &'this self, input: &'input SliceType, ) -> Result<(&'input SliceType, Self::Output), ParseError>
where 'input: 'this,

Parses a given rule at the start of some input. Read more
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fn map_parsed<Output, F: Fn(Self::Output) -> Output>( self, function: F, ) -> Map<'input, SliceType, Self, Output, F>
where Self: Sized,

Maps an infallible function onto the output of a rule.
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fn try_map_parsed<Output, E: Error + 'static, F: Fn(Self::Output) -> Result<Output, E>>( self, function: F, ) -> TryMap<'input, SliceType, Self, Output, E, F>
where Self: Sized,

Maps a function onto the output of a rule, passing the error back if it fails.
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fn prevent(self) -> Not<Self>
where Self: Sized,

Matches when this fails, and vice versa.
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fn repeat_for<const REPS: usize>( self, ) -> RepeatFor<'input, SliceType, Self, REPS>
where Self: Sized,

Repeats this rule a known amount of times.
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fn repeat(self, reps: usize) -> Repeat<'input, SliceType, Self>
where Self: Sized,

Repeats this rule a set amount of times.
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fn take(self, at_most: usize) -> Many<'input, SliceType, Self>
where Self: Sized,

Repeats this rule at most a set amount of times.
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fn hoard(self) -> Many<'input, SliceType, Self>
where Self: Sized,

Repeats this rule forever until it fails.
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fn spanned(self) -> Spanned<'input, SliceType, Self>
where Self: Sized, SliceType: Index<RangeTo<usize>, Output = SliceType>,

Captures the output and span of this rule, returning them along with the output in a Span.
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fn attempt(self) -> Attempt<'input, SliceType, Self>
where Self: Sized,

Tries to capture this rule, returning None if it doesn’t match.
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impl<F, T> StructuralPartialEq for While<F, T>

Auto Trait Implementations§

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impl<F, T> Freeze for While<F, T>
where F: Freeze,

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impl<F, T> RefUnwindSafe for While<F, T>
where F: RefUnwindSafe, T: RefUnwindSafe,

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impl<F, T> Send for While<F, T>
where F: Send, T: Send,

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impl<F, T> Sync for While<F, T>
where F: Sync, T: Sync,

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impl<F, T> Unpin for While<F, T>
where F: Unpin, T: Unpin,

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impl<F, T> UnwindSafe for While<F, T>
where F: UnwindSafe, T: UnwindSafe,

Blanket Implementations§

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> ToOwned for T
where 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 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.