Trait regex::internal::Input

pub trait Input {
    fn at(&self, i: usize) -> InputAt;
    fn next_char(&self, at: InputAt) -> Char;
    fn previous_char(&self, at: InputAt) -> Char;
    fn is_empty_match(&self, at: InputAt, empty: &InstEmptyLook) -> bool;
    fn prefix_at(
        &self, 
        prefixes: &LiteralSearcher, 
        at: InputAt
    ) -> Option<InputAt>;
    fn len(&self) -> usize;
    fn as_bytes(&self) -> &[u8];

    fn is_empty(&self) -> bool { ... }
}

An abstraction over input used in the matching engines.

Required Methods

fn at(&self, i: usize) -> InputAt

Return an encoding of the position at byte offset i.

fn next_char(&self, at: InputAt) -> Char

Return the Unicode character occurring next to at.

If no such character could be decoded, then Char is absent.

fn previous_char(&self, at: InputAt) -> Char

Return the Unicode character occurring previous to at.

If no such character could be decoded, then Char is absent.

fn is_empty_match(&self, at: InputAt, empty: &InstEmptyLook) -> bool

Return true if the given empty width instruction matches at the input position given.

fn prefix_at(&self, prefixes: &LiteralSearcher, at: InputAt) -> Option<InputAt>

Scan the input for a matching prefix.

fn len(&self) -> usize

The number of bytes in the input.

fn as_bytes(&self) -> &[u8]

Return the given input as a sequence of bytes.

Provided Methods

fn is_empty(&self) -> bool

Whether the input is empty.

Implementations on Foreign Types

impl<'a, T: Input> Input for &'a T

fn at(&self, i: usize) -> InputAt

fn next_char(&self, at: InputAt) -> Char

fn previous_char(&self, at: InputAt) -> Char

fn is_empty_match(&self, at: InputAt, empty: &InstEmptyLook) -> bool

fn prefix_at(&self, prefixes: &LiteralSearcher, at: InputAt) -> Option<InputAt>

fn len(&self) -> usize

fn as_bytes(&self) -> &[u8]

fn is_empty(&self) -> bool

Implementors

• impl<'t> Input for CharInput<'t>

• impl<'t> Input for ByteInput<'t>