| // 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)'); |
| } |
| // |
| ////////////////////////////////////////////////////////////////////////////// |
| |
