Crate pest [−] [src]

pest. Smart PEGs in Rust

pest is a parser generator that works with PEGs.

It relies exclusively on macros to create an efficient parser at compile-time.

impl_rdp! {
    grammar! {
        exp = { paren ~ exp | [""] }
        paren = { ["("] ~ exp ~ [")"] }
    }
}

let mut parser = Rdp::new(Box::new(StringInput::new("(())((())())()")));

assert!(parser.exp());
assert!(parser.end());

Macros

grammar!	A `macro` that defines each rule as a method on a `Parser`. Rules starting with an uderscore will not be placed into the queue.
impl_rdp!	A `macro` useful for implementing the `Parser` `trait` as a recursive descent parser.

Structs

Queues	A `struct` which caches `VecDeque`s.
StringInput	A `struct` useful for matching in-memory `String`s.

Traits

Input	A `trait` that defines an input for a `Parser`.
Parser	A `trait` that defines a parser.