SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.c;

import java.io.IOException;

/**
 * Builder for sub-expressions.
 *
 * @param <P> The parent type.
 * @since 2023/06/24
 */
public class CSubExpressionBuilder<P extends CExpressionBuilder<? extends P>>
    extends CExpressionBuilder<CSubExpressionBuilder<? extends P>>
{
    /** The closing token. */
    protected final String closing;
    
    /** The parent __builder. */
    protected final P parent;
    
    /**
     * Initializes the expression __builder.
     * 
     * @param __parent The parent __builder.
     * @param __closing The closing token.
     * @throws NullPointerException On null arguments.
     * @since 2023/06/24
     */
    CSubExpressionBuilder(P __parent, String __closing)
        throws NullPointerException
    {
        super(null);
        
        if (__parent == null || __closing == null)
            throw new NullPointerException("NARG");
        
        this.parent = __parent;
        this.closing = __closing;
    }
    
    /**
     * Closes this expression and returns to the parent.
     * 
     * @return The parent expression __builder.
     * @since 2023/06/24
     */
    public P close()
        throws IOException
    {
        P parent = this.parent;
        
        parent.__add(this._tokens);
        parent.__add(this.closing);
        
        return parent;
    }
}