Implement loop for global regexps in regexp assembler.

test/mjsunit/regexp-global.js

Index: test/mjsunit/regexp-global.js
diff --git a/test/mjsunit/regexp-global.js b/test/mjsunit/regexp-global.js
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+// Copyright 2012 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 that an optional capture is cleared between two matches.
+var str = "ABX X";
+str = str.replace(/(\w)?X/g, function(match, capture) {
+                               assertTrue(match.indexOf(capture) >= 0 ||
+                                           capture === undefined);
+                               return capture ? capture.toLowerCase() : "-";
+                             });
+assertEquals("Ab -", str);
+
+// Test zero-length matches.
+str = "Als Gregor Samsa eines Morgens";
+str = str.replace(/\b/g, function(match, capture) {
+                           return "/";
+                         });
+assertEquals("/Als/ /Gregor/ /Samsa/ /eines/ /Morgens/", str);
+
+// Test zero-length matches that have non-zero-length sub-captures.
+str = "It was a pleasure to burn.";
+str = str.replace(/(?=(\w+))\b/g, function(match, capture) {
+                                    return capture.length;
+                                  });
+assertEquals("2It 3was 1a 8pleasure 2to 4burn.", str);

[Erik Corry, 2012/05/22 08:32:46]

Nice test :-)

[Yang, 2012/05/22 14:48:03]

:)

+
+// Test multiple captures.
+str = "Try not. Do, or do not. There is no try.";
+str = str.replace(/(not?)|(do)|(try)/gi,
+                  function(match, c1, c2, c3) {
+                    assertTrue((c1 === undefined && c2 === undefined) ||
+                               (c2 === undefined && c3 === undefined) ||
+                               (c1 === undefined && c3 === undefined));
+                    if (c1) return "-";
+                    if (c2) return "+";
+                    if (c3) return "="
+                  });
+assertEquals("= -. +, or + -. There is - =.", str);
+
+// Test multiple alternate captures.
+str = "FOUR LEGS GOOD, TWO LEGS BAD!";
+str = str.replace(/(FOUR|TWO) LEGS (GOOD|BAD)/g,
+                  function(match, num_legs, likeability) {
+                    assertTrue(num_legs !== undefined);
+                    assertTrue(likeability !== undefined);
+                    if (num_legs == "FOUR") assertTrue(likeability == "GOOD");
+                    if (num_legs == "TWO") assertTrue(likeability == "BAD");
+                    return match.length - 10;
+                  });
+assertEquals("4, 2!", str);
+
+
+// The same tests with UC16.
+
+//Test that an optional capture is cleared between two matches.
+str = "AB\u1234 \u1234";
+str = str.replace(/(\w)?\u1234/g,
+		              function(match, capture) {
+                    assertTrue(match.indexOf(capture) >= 0 ||
+                               capture === undefined);
+                    return capture ? capture.toLowerCase() : "-";
+                  });
+assertEquals("Ab -", str);
+
+// Test zero-length matches.
+str = "Als \u2623\u2642 eines Morgens";
+str = str.replace(/\b/g, function(match, capture) {
+                           return "/";
+                         });
+assertEquals("/Als/ \u2623\u2642 /eines/ /Morgens/", str);
+
+// Test zero-length matches that have non-zero-length sub-captures.
+str = "It was a pleasure to \u70e7.";
+str = str.replace(/(?=(\w+))\b/g, function(match, capture) {
+                                    return capture.length;
+                                  });
+assertEquals("2It 3was 1a 8pleasure 2to \u70e7.", str);
+
+// Test multiple captures.
+str = "Try not. D\u26aa, or d\u26aa not. There is no try.";
+str = str.replace(/(not?)|(d\u26aa)|(try)/gi,
+                  function(match, c1, c2, c3) {
+                    assertTrue((c1 === undefined && c2 === undefined) ||
+                               (c2 === undefined && c3 === undefined) ||
+                               (c1 === undefined && c3 === undefined));
+                    if (c1) return "-";
+                    if (c2) return "+";
+                    if (c3) return "="
+                  });
+assertEquals("= -. +, or + -. There is - =.", str);
+
+// Test multiple alternate captures.
+str = "FOUR \u817f GOOD, TWO \u817f BAD!";
+str = str.replace(/(FOUR|TWO) \u817f (GOOD|BAD)/g,
+                  function(match, num_legs, likeability) {
+                    assertTrue(num_legs !== undefined);
+                    assertTrue(likeability !== undefined);
+                    if (num_legs == "FOUR") assertTrue(likeability == "GOOD");
+                    if (num_legs == "TWO") assertTrue(likeability == "BAD");
+                    return match.length - 7;
+                  });
+assertEquals("4, 2!", str);