package token;

import (
    "strings"
    "bytes"
)

type operation func(Token) Token

type Token struct {
    Token *next
    interface{} *_inner
}

func eval(string input) string {
    ret  := new(Token)
    iter := &ret
    // buffered reader via new or make i dunno

    for pos, char := range input {
        // switch
    }
}