// BSD 2-Clause License
//
// Copyright (c) 2020 Alasdair Armstrong
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
use std::str::FromStr;
use isla_lib::lexer::LexError;
use crate::sexp::*;
use crate::sexp_lexer::Tok;
grammar<'input>;
pub Sexp: Sexp<'input> = {
"(" <sexps:List<Sexp>> ")" => Sexp::List(sexps),
<a:"atom"> => Sexp::Atom(a),
<nat:"nat"> => Sexp::I128(i128::from_str(nat).unwrap()),
<hex:"hex"> => Sexp::Bits(hex),
<bin:"bin"> => Sexp::Bits(bin),
}
List<T>: Vec<T> = {
<v:(<T>)*> => v
};
extern {
type Location = usize;
type Error = LexError;
enum Tok<'input> {
"atom" => Tok::Atom(<&'input str>),
"nat" => Tok::Nat(<&'input str>),
"hex" => Tok::Hex(<&'input str>),
"bin" => Tok::Bin(<&'input str>),
"(" => Tok::Lparen,
")" => Tok::Rparen,
}
}