JezK

Edit File: try.js

// Copyright 2008 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.

// Flags: --expose-gc

function Catch(f, g) {
  var r;
  try { r = f(); } catch (o) { return g(o); }
  return r;
}

function CatchReturn(f, g) {
  try { return f(); } catch (o) { return g(o); }
}

assertEquals(1, (function() { try { return 1; } finally { } })());
assertEquals(1, (function() { try { return 1; } finally { var x = 12; } })());
assertEquals(2, (function() { try { } finally { return 2; } })());
assertEquals(4, (function() { try { return 3; } finally { return 4; } })());

function f(x, n, v) { try { return x; } finally { x[n] = v; } }
assertEquals(2, f({}, 'foo', 2).foo);
assertEquals(5, f({}, 'bar', 5).bar);

(function () {
  var iter = 1000000;
  for (var i = 1; i <= iter; i++) {
    try {
      if (i == iter) gc();
    } finally {
      if (i == iter) gc();
    }
  }
})();

assertEquals(1, a[2], "a[2]");
assertTrue(typeof a[3] === 'undefined', "a[3]");

assertTrue(typeof o === 'undefined', "global.o");

function return_from_nested_catch(x) {
  try {
    try {
      return x;
    } catch (o) {
      return -1;
    }
  } catch (o) {
    return -2;
  }
}

assertEquals(0, return_from_nested_catch(0));
assertEquals(1, return_from_nested_catch(1));

function return_from_nested_finally(x) {
  var a = [x-2];
  try {
    try {
      return a;
    } finally {
      a[0]++;
    }
  } finally {
    a[0]++;
  }
}

assertEquals(0, return_from_nested_finally(0)[0]);
assertEquals(1, return_from_nested_finally(1)[0]);

function break_from_catch(x) {
  x--;
 L:
  {
    try {
      x++;
      if (false) return -1;
      break L;
    } catch (o) {
      x--;
    }
  }
  return x;
}

assertEquals(0, break_from_catch(0));
assertEquals(1, break_from_catch(1));

function break_from_finally(x) {
 L:
  {
    try {
      x++;
      if (false) return -1;
      break L;
    } finally {
      x--;
    }
    x--;
  }
  return x;
}

assertEquals(0, break_from_finally(0), "break from finally");
assertEquals(1, break_from_finally(1), "break from finally");

assertEquals(0, continue_from_catch(0));
assertEquals(1, continue_from_catch(1));

assertEquals(0, continue_from_finally(0));
assertEquals(1, continue_from_finally(1));

assertEquals(100, continue_alot_from_finally(100));
assertEquals(200, continue_alot_from_finally(200));

assertEquals(0, break_from_nested_catch(0));
assertEquals(1, break_from_nested_catch(1));

assertEquals(0, break_from_nested_finally(0));
assertEquals(1, break_from_nested_finally(1));

assertEquals(0, continue_from_nested_catch(0));
assertEquals(1, continue_from_nested_catch(1));

assertEquals(0, continue_from_nested_finally(0));
assertEquals(1, continue_from_nested_finally(1));

function return_from_nested_finally_in_finally() {
  try {
    return 1;
  } finally {
    try {
      return 2;
    } finally {
      return 42;
    }
  }
}

assertEquals(42, return_from_nested_finally_in_finally());

function break_from_nested_finally_in_finally() {
  L: try {
    return 1;
  } finally {
    try {
      return 2;
    } finally {
      break L;
    }
  }
  return 42;
}

assertEquals(42, break_from_nested_finally_in_finally());

assertEquals(42, continue_from_nested_finally_in_finally());

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