Enum PegExpr 

pub enum PegExpr {
    Char(char),
    Any,
    Seq(Box<PegExpr>, Box<PegExpr>),
    Choice(Box<PegExpr>, Box<PegExpr>),
    Star(Box<PegExpr>),
    Plus(Box<PegExpr>),
    Optional(Box<PegExpr>),
    Not(Box<PegExpr>),
    And(Box<PegExpr>),
}

A runtime PEG expression.

Variants

Char(char)

Match a literal character.

Any

Match any character.

Seq(Box<PegExpr>, Box<PegExpr>)

Sequence: e1 followed by e2.

Choice(Box<PegExpr>, Box<PegExpr>)

Ordered choice: try e1, if it fails (without consuming input) try e2.

Star(Box<PegExpr>)

Zero or more: e*

Plus(Box<PegExpr>)

One or more: e+

Optional(Box<PegExpr>)

Optional: e?

Not(Box<PegExpr>)

Negative lookahead: !e

And(Box<PegExpr>)

Positive lookahead: &e

Implementations

impl PegExpr

pub fn matches(&self, input: &str, pos: usize) -> Option<usize>

Try to match the expression at position pos in input. Returns the new position if successful, or None on failure.

pub fn match_full(&self, input: &str) -> bool

Check if the expression matches the entire string.

Trait Implementations

impl Clone for PegExpr

fn clone(&self) -> PegExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PegExpr

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

Formats the value using the given formatter.