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// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/**
* The production ReturnStatement : return Expression; is evaluated as:
* i) Evaluate Expression.
* ii) Call GetValue(Result(2)).
* iii) Return (return, Result(3), empty)
*
* @path ch12/12.9/S12.9_A4.js
* @description Return very sophisticated expression and function
*/
// second derivative
function DD_operator(f, delta){return function(x){return (f(x+delta)-2*f(x)+f(x-delta))/(delta*delta)};}
DDsin = DD_operator(Math.sin, 0.00001);
//////////////////////////////////////////////////////////////////////////////
//CHECK#1
// ((sin(x))')' = -sin(x)
if (DDsin( Math.PI/2 ) + Math.sin( Math.PI/2 ) > 0.00001) {
$ERROR('#1: return Expression yields to Return (return, GetValue(Evaluate Expression), empty)');
}
//
//////////////////////////////////////////////////////////////////////////////
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