Struct TryMap

pub struct TryMap<'input, SliceType: ?Sized, R: Rule<'input, SliceType>, O, E: Error + 'static, Func: Fn(R::Output) -> Result<O, E>> { /* private fields */ }

Attempts to map a function over the output of a rule. See Rule::try_map_parsed.

Trait Implementations

impl<'input, SliceType: Clone + ?Sized, R: Clone + Rule<'input, SliceType>, O: Clone, E: Clone + Error + 'static, Func: Clone + Fn(R::Output) -> Result<O, E>> Clone for TryMap<'input, SliceType, R, O, E, Func>

fn clone(&self) -> TryMap<'input, SliceType, R, O, E, Func>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'input, SliceType: Debug + ?Sized, R: Debug + Rule<'input, SliceType>, O: Debug, E: Debug + Error + 'static, Func: Debug + Fn(R::Output) -> Result<O, E>> Debug for TryMap<'input, SliceType, R, O, E, Func>

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

Formats the value using the given formatter.

impl<'input, SliceType: ?Sized, R: Rule<'input, SliceType>, O, E: Error + 'static, Func: Fn(R::Output) -> Result<O, E>> NamedRule for TryMap<'input, SliceType, R, O, E, Func>

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

Defines the name printed in errors including this rule.

impl<'input, SliceType: PartialEq + ?Sized, R: PartialEq + Rule<'input, SliceType>, O: PartialEq, E: PartialEq + Error + 'static, Func: PartialEq + Fn(R::Output) -> Result<O, E>> PartialEq for TryMap<'input, SliceType, R, O, E, Func>

fn eq(&self, other: &TryMap<'input, SliceType, R, O, E, Func>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'input, SliceType: ?Sized, R: Rule<'input, SliceType>, O, E: Error + 'static, Func: Fn(R::Output) -> Result<O, E>> Rule<'input, SliceType> for TryMap<'input, SliceType, R, O, E, Func>

type Output = O

The type of the value of a successful parse of this rule.

fn parse_at<'cursor, 'this, 'index>( &'this self, input: &'cursor mut &'input SliceType, index: &'index mut usize, ) -> Result<Self::Output, ParseError>

where 'input: 'this,

Parses a rule at a given index with a given input.

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.

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.

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.

fn prevent(self) -> Not<Self>

where Self: Sized,

Matches when this fails, and vice versa.

fn repeat_for<const REPS: usize>( self, ) -> RepeatFor<'input, SliceType, Self, REPS>

where Self: Sized,

Repeats this rule a known amount of times.

fn repeat(self, reps: usize) -> Repeat<'input, SliceType, Self>

where Self: Sized,

Repeats this rule a set amount of times.

fn take(self, at_most: usize) -> Many<'input, SliceType, Self>

where Self: Sized,

Repeats this rule at most a set amount of times.

fn hoard(self) -> Many<'input, SliceType, Self>

where Self: Sized,

Repeats this rule forever until it fails.

fn attempt(self) -> Attempt<'input, SliceType, Self>

where Self: Sized,

Tries to capture this rule, returning None if it doesn’t match.

impl<'input, SliceType: ?Sized, R: Rule<'input, SliceType>, O, E: Error + 'static, Func: Fn(R::Output) -> Result<O, E>> StructuralPartialEq for TryMap<'input, SliceType, R, O, E, Func>