michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 418641;
michael@0: var summary = '++ and -- correctness';
michael@0: var actual = '';
michael@0: var expect = '';
michael@0: 
michael@0: printBugNumber(BUGNUMBER);
michael@0: printStatus (summary);
michael@0:  
michael@0: function get_pre_check(operand, op)
michael@0: {
michael@0:   return "{\n"+
michael@0:     "    "+operand+" = I;\n"+
michael@0:     "    let tmp = "+op+op+operand+";\n"+
michael@0:     "    if ("+operand+" !== Number(I) "+op+" 1)\n"+
michael@0:     "        throw Error('"+op+op+operand+" case 1 for '+uneval(I));\n"+
michael@0:     "    if (tmp !== "+operand+")\n"+
michael@0:     "        throw Error('"+op+op+operand+" case 2 for '+uneval(I));\n"+
michael@0:     "}\n";    
michael@0: }
michael@0: 
michael@0: function get_post_check(operand, op)
michael@0: {
michael@0:   return "{\n"+
michael@0:     "    "+operand+" = I;\n"+
michael@0:     "    let tmp = "+operand+op+op+";\n"+
michael@0:     "    if ("+operand+" !== Number(I) "+op+" 1)\n"+
michael@0:     "        throw Error('"+operand+op+op+" case 1 for '+uneval(I));\n"+
michael@0:     "    if (tmp !== Number(I))\n"+
michael@0:     "        throw Error('"+op+op+operand+" case 2 for '+uneval(I));\n"+
michael@0:     "}\n";    
michael@0: }
michael@0: 
michael@0: function get_check_source(operand)
michael@0: {
michael@0:   return get_pre_check(operand, '+')+
michael@0:     get_pre_check(operand, '-')+
michael@0:     get_post_check(operand, '+')+
michael@0:     get_post_check(operand, '-');
michael@0: }
michael@0: 
michael@0: var arg_check = Function('I', 'a', get_check_source('a'));
michael@0: var let_check = Function('I', 'let a;'+get_check_source('a'));
michael@0: var var_check = Function('I', 'var a;'+get_check_source('a'));
michael@0: 
michael@0: var my_name;
michael@0: var my_obj = {};
michael@0: var my_index = 0;
michael@0: var name_check = Function('I', get_check_source('my_name'));
michael@0: var prop_check = Function('I', get_check_source('my_obj.x'));
michael@0: var elem_check = Function('I', get_check_source('my_obj[my_index]'));
michael@0: 
michael@0: var test_values = [0 , 0.5, -0.0, (1 << 30) - 1, 1 - (1 << 30)];
michael@0: 
michael@0: for (let i = 0; i != test_values.length; i = i + 1) {
michael@0:   let x = [test_values[i], String(test_values[i])];
michael@0:   for (let j = 0; j != x.length; j = j + 1) {
michael@0:     try
michael@0:     {
michael@0:       expect = actual = 'No Error';
michael@0:       let test_value = x[j];
michael@0:       arg_check(test_value, 0);
michael@0:       let_check(test_value);
michael@0:       var_check(test_value);
michael@0:       name_check(test_value);
michael@0:       prop_check(test_value);
michael@0:       elem_check(test_value);
michael@0:     }
michael@0:     catch(ex)
michael@0:     {
michael@0:       actual = ex + '';
michael@0:     }
michael@0:     reportCompare(expect, actual, summary + ': ' + i + ', ' + j);
michael@0:   }
michael@0: }