ac712f13c3
According to the ES5 spec all ">" and "<=" expressions should be be evaluated left-to-right. This obsoletes old hacks for reversing the order to be ES3 compliant. R=lrn@chromium.org BUG=v8:1752 Review URL: http://codereview.chromium.org/8275035 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9641 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
109 lines
3.4 KiB
JavaScript
109 lines
3.4 KiB
JavaScript
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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function MaxLT(x, y) {
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if (x < y) return y;
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return x;
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}
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function MaxLE(x, y) {
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if (x <= y) return y;
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return x;
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}
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function MaxGE(x, y) {
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if (x >= y) return x;
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return y;
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}
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function MaxGT(x, y) {
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if (x > y) return x;
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return y;
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}
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// First test primitive values.
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function TestPrimitive(max, x, y) {
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assertEquals(max, MaxLT(x, y), "MaxLT - primitive");
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assertEquals(max, MaxLE(x, y), "MaxLE - primitive");
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assertEquals(max, MaxGE(x, y), "MaxGE - primitive");
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assertEquals(max, MaxGT(x, y), "MaxGT - primitive");
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}
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TestPrimitive(1, 0, 1);
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TestPrimitive(1, 1, 0);
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TestPrimitive(4, 3, 4);
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TestPrimitive(4, 4, 3);
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TestPrimitive(0, -1, 0);
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TestPrimitive(0, 0, -1)
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TestPrimitive(-2, -2, -3);
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TestPrimitive(-2, -3, -2);
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TestPrimitive(1, 0.1, 1);
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TestPrimitive(1, 1, 0.1);
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TestPrimitive(4, 3.1, 4);
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TestPrimitive(4, 4, 3.1);
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TestPrimitive(0, -1.1, 0);
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TestPrimitive(0, 0, -1.1)
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TestPrimitive(-2, -2, -3.1);
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TestPrimitive(-2, -3.1, -2);
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// Test non-primitive values and watch for valueOf call order.
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function TestNonPrimitive(order, f) {
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var result = "";
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var x = { valueOf: function() { result += "x"; } };
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var y = { valueOf: function() { result += "y"; } };
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f(x, y);
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assertEquals(order, result);
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}
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TestNonPrimitive("xy", MaxLT);
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TestNonPrimitive("xy", MaxLE);
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TestNonPrimitive("xy", MaxGE);
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TestNonPrimitive("xy", MaxGT);
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// Test compare in case of aliased registers.
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function CmpX(x) { if (x == x) return 42; }
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assertEquals(42, CmpX(0));
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function CmpXY(x) { var y = x; if (x == y) return 42; }
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assertEquals(42, CmpXY(0));
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// Test compare against null.
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function CmpNullValue(x) { return x == null; }
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assertEquals(false, CmpNullValue(42));
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function CmpNullTest(x) { if (x == null) return 42; return 0; }
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assertEquals(42, CmpNullTest(null));
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var g1 = 0;
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function CmpNullEffect() { (g1 = 42) == null; }
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CmpNullEffect();
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assertEquals(42, g1);
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