OpenJScad RPN Hacking

function stack( )
{
    this.inner = [ ];

    this.push = function( object )
    {
        if ( typeof( object ) == "string" && object in this )
            eval( "this." + object + "()" );
        else
            this.inner.push( object );
        return this;
    }

    this.pop = function( )
    {
        return this.inner.pop( );
    }

    this.union = function( )
    {
        var a = this.pop( );
        var b = this.pop( );
        this.push( union( a, b ) );
        return this;
    }

    this.difference = function( )
    {
        var a = this.pop( );
        var b = this.pop( );
        this.push( difference( a, b ) );
        return this;
    }

    this.translate = function( )
    {
        var a = this.pop( );
        var b = this.pop( );
        this.push( b.translate( a ) );
        return this;
    }

    this.scale = function( )
    {
        var a = this.pop( );
        var b = this.pop( );
        this.push( b.scale( a ) );
        return this;
    }

    this.dup = function( )
    {
        var a = this.pop( );
        this.push( a );
        this.push( a );
        return this;
    }

    this.swap = function( )
    {
        var a = this.pop( );
        var b = this.pop( );
        this.push( a );
        this.push( b );
        return this;
    }
}

function main( )
{
    return new stack( )     // Create stack
    .push( cube( ) )        // Push a cube
    .dup( )                 // Duplicate the top of stack
    .push( [ 1, 1, 0 ] )    // Push coordinates
    .translate( )           // Translate
    .union( )               // Join the two objects
    .push( 10 )             // Push 10
    .scale( )               // Scale
    .pop( );                // Return top of stack
}