/* relish: versatile lisp shell
 * Copyright (C) 2021 Aidan Hahn
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

use crate::str::{get_echo, get_concat};
use crate::append::get_append;
use crate::func::{FTable, func_declare};
use crate::vars::{get_export};
use std::rc::Rc;
use std::cell::RefCell;

pub fn get_stdlib() -> Result<Rc<RefCell<FTable>>, String> {
    let ft = Rc::new(RefCell::new(FTable::new()));
    if let Some(s) = func_declare(ft.clone(), Rc::new(RefCell::new(get_echo()))) {
        return Err(s)
    }
    if let Some(s) = func_declare(ft.clone(), Rc::new(RefCell::new(get_append()))) {
        return Err(s)
    }
    if let Some(s) = func_declare(ft.clone(), Rc::new(RefCell::new(get_concat()))) {
        return Err(s)
    }
    if let Some(s) = func_declare(ft.clone(), Rc::new(RefCell::new(get_export()))) {
        return Err(s)
    }

    return Ok(ft)
}