Struct Lookahead

pub struct Lookahead {
    pub is_positive: bool,
    pub pattern: String,
}

A lookahead that is used to match the input. The lookahead is a regular expression that must match after the pattern for the pattern to be considered a match. The lookahead can be positive or negative. If the lookahead is positive, it must match for the pattern to be considered a match. If the lookahead is negative, it must not match for the pattern to be considered a match. The lookahead is optional. The characters read by the lookahead are not included in the match.

Fields

is_positive: bool

If the lookahead is positive.

pattern: String

The lookahead pattern.

Implementations

impl Lookahead

pub fn new(is_positive: bool, pattern: String) -> Self

Create a new lookahead.

pub fn pattern(&self) -> &str

Get the pattern.

pub fn is_positive(&self) -> bool

Check if the lookahead is positive.

Trait Implementations

impl Clone for Lookahead

fn clone(&self) -> Lookahead

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Lookahead

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Lookahead

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Lookahead

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

Formats the value using the given formatter.

impl Hash for Lookahead

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Lookahead

fn eq(&self, other: &Lookahead) -> 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 Serialize for Lookahead

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Lookahead

impl StructuralPartialEq for Lookahead