unsynn (from german 'unsinn' for nonsense) is a minimalist rust parser library. It achives this by leaving out the actual grammar implementations and compromise on error reporting (yet, TBD). In exchange it offers simple composeable Parsers. Grammars will be implemented in their own crates (see unsynn-rust).

Its intended use is when one wants to create proc macros for rust that define their own grammar.

Example

# use unsynn::*;
let mut token_iter = quote::quote!{ foo ( bar, baz, barf ) }.into_iter();

// Composition
let ast =
    Cons::<Ident, ParenthesisGroupContaining::<CommaDelimitedVec<Ident>>>
        ::parse(&mut token_iter).unwrap();

// The same defining a custom type
unsynn!{
    struct IdentThenParenthesisedIdents {
        ident: Ident,
        pidents: ParenthesisGroupContaining::<CommaDelimitedVec<Ident>>,
    }
}

let mut token_iter = quote::quote!{ foo ( bar, baz, barf ) }.into_iter();

let ast = IdentThenParenthesisedIdents::parse(&mut token_iter).unwrap();