text: // Copyright 2009 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Test pre- and postfix count operations.
  
  // Test value context.
  var a = 42;
  var b = {x:42};
  var c = "x";
  assert_equal(43, ++a);
  assert_equal(43, a);
  assert_equal(43, a++);
  assert_equal(44, a);
  assert_equal(43, ++b.x);
  assert_equal(43, b.x);
  assert_equal(43, b.x++);
  assert_equal(44, b.x);
  assert_equal(45, ++b[c]);
  assert_equal(45, b[c]);
  assert_equal(45, b[c]++);
  assert_equal(46, b[c]);
  
  // Test test context.
  a = 42;
  b = {x:42};
  c = "x";
  assert_equal(1, (++a) ? 1 : 0);
  assert_equal(43, a);
  assert_equal(1, (a++) ? 1 : 0);
  assert_equal(44, a);
  assert_equal(1, (++b.x) ? 1 : 0);
  assert_equal(43, b.x);
  assert_equal(1, (b.x++) ? 1 : 0);
  assert_equal(44, b.x);
  assert_equal(1, (++b[c]) ? 1 : 0);
  assert_equal(45, b[c]);
  assert_equal(1, (b[c]++) ? 1 : 0);
  assert_equal(46, b[c]);
  
  // following test fails; because || returns 0 or 1
  // // Test value/test and test/value contexts.
  // a = 42;
  // b = {x:42};
  // c = "x";
  // assert_equal(43, ++a || 1);
  // assert_equal(43, a);
  // assert_equal(43, a++ || 1);
  // assert_equal(44, a);
  // assert_equal(43, ++b.x || 1);
  // assert_equal(43, b.x);
  // assert_equal(43, (b.x++) || 1);
  // assert_equal(44, b.x);
  // assert_equal(45, ++b[c] || 1);
  // assert_equal(45, b[c]);
  // assert_equal(45, b[c]++ || 1);
  // assert_equal(46, b[c]);
  // a = 42;
  // b = {x:42};
  // c = "x";
  // assert_equal(1, ++a && 1);
  // assert_equal(43, a);
  // assert_equal(1, a++ && 1);
  // assert_equal(44, a);
  // assert_equal(1, ++b.x && 1);
  // assert_equal(43, b.x);
  // assert_equal(1, (b.x++) && 1);
  // assert_equal(44, b.x);
  // assert_equal(1, ++b[c] && 1);
  // assert_equal(45, b[c]);
  // assert_equal(1, b[c]++ && 1);
  // assert_equal(46, b[c]);
  
  // // Test count operations with parameters.
  function f(x) { x++; return x; }
  assert_equal(43, f(42));
  
  function g(x) { ++x; return x; }
  assert_equal(43, g(42));
  
  function h(x) { var y = x++; return y; }
  assert_equal(42, h(42));
  
  function k(x) { var y = ++x; return y; }
  assert_equal(43, k(42));
  
  // Test count operation in a test context.
  function countTestPost(i) { var k = 0; while (i--) { k++; } return k; }
  assert_equal(10, countTestPost(10));
  
  function countTestPre(i) { var k = 0; while (--i) { k++; } return k; }
  assert_equal(9, countTestPre(10));
  