// See the end of this file for copyright and license terms.

use std::str::Chars;

pub struct Lexer<'a> {
    stream: Chars<'a>,
}

impl <'a> Lexer<'a> {
    pub const fn new(stream: Chars<'a>) -> Lexer<'a> {
        Lexer {
            stream: stream,
        }
    }
}

#[derive(Debug)]
pub struct Token {
    pub kind: TokenKind,
    pub line: usize,
    pub col: usize,
}

#[derive(Debug)]
pub enum TokenKind {
    Semi,
    Ident(String),
    BoolLiteral(bool),
    IntLiteral(i64),
    StringLiteral(String),
}

impl <'a> Iterator for Lexer<'a> {
    type Item = Result<Token, SyntaxError>;

    fn next(&mut self) -> Option<Result<Token, SyntaxError>> {
        // TODO
        None
    }
}

pub struct SyntaxError {
    pub msg: String,
    pub line: usize,
    pub col: usize,
}

// Copyright (C) 2021 Fefie <owo@fef.moe>
// This file is part of gayconf.
//
// gayconf is ethical software: you can use, redistribute,
// and/or modify it under the terms of the CNPLv5+ as found
// in the LICENSE file in the source code root directory or
// at <https://git.pixie.town/thufie/CNPL>.
//
// gayconf comes with ABSOLUTELY NO WARRANTY, to the extent
// permitted by applicable law.  See the CNPL for details.