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package nl.weeaboo.lua2.vm;

import nl.weeaboo.lua2.io.LuaSerializable;

/**
 * Varargs implemenation with no values.
 * 
 * This is an internal class not intended to be used directly. Instead use the predefined constant
 * {@link #NONE}
 */
@LuaSerializable
final class None extends LuaNil {

    private static final long serialVersionUID = 1L;

    static final None NONE = new None();

    private None() {
    }

    @Override
    public LuaValue arg(int i) {
        return NIL;
    }

    @Override
    public Object readResolve() {
        // Special serialization returning the singleton
        return NONE;
    }

    @Override
    public int narg() {
        return 0;
    }

    @Override
    public LuaValue arg1() {
        return NIL;
    }

    @Override
    public String tojstring() {
        return "none";
    }

}