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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/170187">170187</a></dd>
<dt>Author</dt> <dd>andersca@apple.com</dd>
<dt>Date</dt> <dd>2014-06-20 09:35:36 -0700 (Fri, 20 Jun 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Add WTF::Optional class
https://bugs.webkit.org/show_bug.cgi?id=134083
Reviewed by Andreas Kling.
Source/WTF:
* WTF.xcodeproj/project.pbxproj:
* wtf/Optional.h: Added.
(WTF::Optional::Optional):
(WTF::Optional::~Optional):
(WTF::Optional::operator bool):
(WTF::Optional::value):
Tools:
* TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
* TestWebKitAPI/Tests/WTF/Optional.cpp: Added.
(TestWebKitAPI::TEST):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWTFChangeLog">trunk/Source/WTF/ChangeLog</a></li>
<li><a href="#trunkSourceWTFWTFxcodeprojprojectpbxproj">trunk/Source/WTF/WTF.xcodeproj/project.pbxproj</a></li>
<li><a href="#trunkToolsChangeLog">trunk/Tools/ChangeLog</a></li>
<li><a href="#trunkToolsTestWebKitAPITestWebKitAPIxcodeprojprojectpbxproj">trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceWTFwtfOptionalh">trunk/Source/WTF/wtf/Optional.h</a></li>
<li><a href="#trunkToolsTestWebKitAPITestsWTFOptionalcpp">trunk/Tools/TestWebKitAPI/Tests/WTF/Optional.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/ChangeLog (170186 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/ChangeLog 2014-06-20 15:39:24 UTC (rev 170186)
+++ trunk/Source/WTF/ChangeLog 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2014-06-19 Anders Carlsson <andersca@apple.com>
+
+ Add WTF::Optional class
+ https://bugs.webkit.org/show_bug.cgi?id=134083
+
+ Reviewed by Andreas Kling.
+
+ * WTF.xcodeproj/project.pbxproj:
+ * wtf/Optional.h: Added.
+ (WTF::Optional::Optional):
+ (WTF::Optional::~Optional):
+ (WTF::Optional::operator bool):
+ (WTF::Optional::value):
+
</ins><span class="cx"> 2014-06-19 Dániel Bátyai <dbatyai.u-szeged@partner.samsung.com>
</span><span class="cx">
</span><span class="cx"> Remove ENABLE(LLINT) and ENABLE(LLINT_C_LOOP) guards
</span></span></pre></div>
<a id="trunkSourceWTFWTFxcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/WTF.xcodeproj/project.pbxproj (170186 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/WTF.xcodeproj/project.pbxproj 2014-06-20 15:39:24 UTC (rev 170186)
+++ trunk/Source/WTF/WTF.xcodeproj/project.pbxproj 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -63,6 +63,7 @@
</span><span class="cx"> 1A6EB1E0187D0BD30030126F /* StringView.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A6EB1DF187D0BD30030126F /* StringView.h */; };
</span><span class="cx"> 1ACADD841884480100D8B71D /* DeprecatedSymbolsUsedBySafari.mm in Sources */ = {isa = PBXBuildFile; fileRef = 1ACADD821884480100D8B71D /* DeprecatedSymbolsUsedBySafari.mm */; };
</span><span class="cx"> 1AFDE648195201C300C48FFA /* TypeCasts.h in Headers */ = {isa = PBXBuildFile; fileRef = 1AFDE647195201C300C48FFA /* TypeCasts.h */; };
</span><ins>+ 1AFDE6531953B23D00C48FFA /* Optional.h in Headers */ = {isa = PBXBuildFile; fileRef = 1AFDE6521953B23D00C48FFA /* Optional.h */; };
</ins><span class="cx"> 1FA47C8A152502DA00568D1B /* WebCoreThread.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1FA47C88152502DA00568D1B /* WebCoreThread.cpp */; };
</span><span class="cx"> 1FA47C8B152502DA00568D1B /* WebCoreThread.h in Headers */ = {isa = PBXBuildFile; fileRef = 1FA47C89152502DA00568D1B /* WebCoreThread.h */; };
</span><span class="cx"> 26147B0A15DDCCDC00DDB907 /* IntegerToStringConversion.h in Headers */ = {isa = PBXBuildFile; fileRef = 26147B0815DDCCDC00DDB907 /* IntegerToStringConversion.h */; };
</span><span class="lines">@@ -345,6 +346,7 @@
</span><span class="cx"> 1A6EB1DF187D0BD30030126F /* StringView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StringView.h; sourceTree = "<group>"; };
</span><span class="cx"> 1ACADD821884480100D8B71D /* DeprecatedSymbolsUsedBySafari.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = DeprecatedSymbolsUsedBySafari.mm; sourceTree = "<group>"; };
</span><span class="cx"> 1AFDE647195201C300C48FFA /* TypeCasts.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TypeCasts.h; sourceTree = "<group>"; };
</span><ins>+ 1AFDE6521953B23D00C48FFA /* Optional.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Optional.h; sourceTree = "<group>"; };
</ins><span class="cx"> 1FA47C88152502DA00568D1B /* WebCoreThread.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebCoreThread.cpp; sourceTree = "<group>"; };
</span><span class="cx"> 1FA47C89152502DA00568D1B /* WebCoreThread.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebCoreThread.h; sourceTree = "<group>"; };
</span><span class="cx"> 26147B0815DDCCDC00DDB907 /* IntegerToStringConversion.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = IntegerToStringConversion.h; sourceTree = "<group>"; };
</span><span class="lines">@@ -796,6 +798,7 @@
</span><span class="cx"> A8A472D8151A825B004123FF /* OSAllocatorPosix.cpp */,
</span><span class="cx"> A8A472DA151A825B004123FF /* OSRandomSource.cpp */,
</span><span class="cx"> A8A472DB151A825B004123FF /* OSRandomSource.h */,
</span><ins>+ 1AFDE6521953B23D00C48FFA /* Optional.h */,
</ins><span class="cx"> A8A472DD151A825B004123FF /* OwnPtr.h */,
</span><span class="cx"> A8A472DE151A825B004123FF /* OwnPtrCommon.h */,
</span><span class="cx"> A8A472DF151A825B004123FF /* PackedIntVector.h */,
</span><span class="lines">@@ -1154,6 +1157,7 @@
</span><span class="cx"> A8A47441151A825B004123FF /* StringImpl.h in Headers */,
</span><span class="cx"> A8A47442151A825B004123FF /* StringOperators.h in Headers */,
</span><span class="cx"> 0FDDBFA81666DFA300C55FEF /* StringPrintStream.h in Headers */,
</span><ins>+ 1AFDE6531953B23D00C48FFA /* Optional.h in Headers */,
</ins><span class="cx"> A8A473B8151A825B004123FF /* strtod.h in Headers */,
</span><span class="cx"> A8A4742E151A825B004123FF /* TCPackedCache.h in Headers */,
</span><span class="cx"> A8A4742F151A825B004123FF /* TCPageMap.h in Headers */,
</span></span></pre></div>
<a id="trunkSourceWTFwtfOptionalh"></a>
<div class="addfile"><h4>Added: trunk/Source/WTF/wtf/Optional.h (0 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/Optional.h (rev 0)
+++ trunk/Source/WTF/wtf/Optional.h 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -0,0 +1,107 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+#ifndef Optional_h
+#define Optional_h
+
+#include <type_traits>
+#include <wtf/Assertions.h>
+
+// WTF::Optional is a class based on std::optional, described here:
+// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2013/n3527.html
+// If this ends up in a C++ standard, we should replace our implementation with it.
+
+namespace WTF {
+
+enum InPlaceTag { InPlace };
+enum NulloptTag { Nullopt };
+
+template<typename T>
+class Optional {
+public:
+ Optional()
+ : m_isEngaged(false)
+ {
+ }
+
+ Optional(NulloptTag)
+ : m_isEngaged(false)
+ {
+ }
+
+ Optional(const T& value)
+ : m_isEngaged(true)
+ , m_value(value)
+ {
+ }
+
+ Optional(T&& value)
+ : m_isEngaged(true)
+ , m_value(std::move(value))
+ {
+ }
+
+ template<typename... Args>
+ Optional(InPlaceTag, Args&&... args)
+ : m_isEngaged(true)
+ , m_value(std::forward<Args>(args)...)
+ {
+
+ }
+
+ ~Optional()
+ {
+ if (m_isEngaged)
+ m_value.~T();
+ }
+
+ explicit operator bool() const { return m_isEngaged; }
+
+ T& value()
+ {
+ ASSERT(m_isEngaged);
+ return m_value;
+ }
+
+ const T& value() const
+ {
+ ASSERT(m_isEngaged);
+ return m_value;
+ }
+
+private:
+ bool m_isEngaged;
+ union {
+ T m_value;
+ };
+};
+
+} // namespace WTF
+
+using WTF::InPlace;
+using WTF::Nullopt;
+using WTF::Optional;
+
+#endif // Optional_h
</ins></span></pre></div>
<a id="trunkToolsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Tools/ChangeLog (170186 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/ChangeLog 2014-06-20 15:39:24 UTC (rev 170186)
+++ trunk/Tools/ChangeLog 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2014-06-19 Anders Carlsson <andersca@apple.com>
+
+ Add WTF::Optional class
+ https://bugs.webkit.org/show_bug.cgi?id=134083
+
+ Reviewed by Andreas Kling.
+
+ * TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
+ * TestWebKitAPI/Tests/WTF/Optional.cpp: Added.
+ (TestWebKitAPI::TEST):
+
</ins><span class="cx"> 2014-06-20 Ion Rosca <rosca@adobe.com>
</span><span class="cx">
</span><span class="cx"> Unreviewed. Adding myself to Committers list.
</span></span></pre></div>
<a id="trunkToolsTestWebKitAPITestWebKitAPIxcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj (170186 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj 2014-06-20 15:39:24 UTC (rev 170186)
+++ trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -32,6 +32,7 @@
</span><span class="cx"> 1AE72F48173EB214006362F0 /* TerminateTwice.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1AE72F47173EB214006362F0 /* TerminateTwice.cpp */; };
</span><span class="cx"> 1AEDE22613E5E7E700E62FE8 /* InjectedBundleControllerMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = 1AEDE22413E5E7A000E62FE8 /* InjectedBundleControllerMac.mm */; };
</span><span class="cx"> 1AEF994917A09F5400998EF0 /* GetPIDAfterAbortedProcessLaunch.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1AEF994817A09F5300998EF0 /* GetPIDAfterAbortedProcessLaunch.cpp */; };
</span><ins>+ 1AFDE6561953B2C000C48FFA /* Optional.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1AFDE6541953B2C000C48FFA /* Optional.cpp */; };
</ins><span class="cx"> 261516D615B0E60500A2C201 /* SetAndUpdateCacheModel.mm in Sources */ = {isa = PBXBuildFile; fileRef = 261516D515B0E60500A2C201 /* SetAndUpdateCacheModel.mm */; };
</span><span class="cx"> 26300B1816755CD90066886D /* ListHashSet.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 26300B1716755CD90066886D /* ListHashSet.cpp */; };
</span><span class="cx"> 265AF55015D1E48A00B0CB4A /* WTFString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 265AF54F15D1E48A00B0CB4A /* WTFString.cpp */; };
</span><span class="lines">@@ -367,6 +368,7 @@
</span><span class="cx"> 1AE72F47173EB214006362F0 /* TerminateTwice.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = TerminateTwice.cpp; sourceTree = "<group>"; };
</span><span class="cx"> 1AEDE22413E5E7A000E62FE8 /* InjectedBundleControllerMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = InjectedBundleControllerMac.mm; sourceTree = "<group>"; };
</span><span class="cx"> 1AEF994817A09F5300998EF0 /* GetPIDAfterAbortedProcessLaunch.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = GetPIDAfterAbortedProcessLaunch.cpp; sourceTree = "<group>"; };
</span><ins>+ 1AFDE6541953B2C000C48FFA /* Optional.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Optional.cpp; sourceTree = "<group>"; };
</ins><span class="cx"> 261516D515B0E60500A2C201 /* SetAndUpdateCacheModel.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = SetAndUpdateCacheModel.mm; sourceTree = "<group>"; };
</span><span class="cx"> 26300B1716755CD90066886D /* ListHashSet.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ListHashSet.cpp; sourceTree = "<group>"; };
</span><span class="cx"> 265AF54F15D1E48A00B0CB4A /* WTFString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WTFString.cpp; sourceTree = "<group>"; };
</span><span class="lines">@@ -897,6 +899,7 @@
</span><span class="cx"> CD5497B315857F0C00B5BC30 /* MediaTime.cpp */,
</span><span class="cx"> 0FC6C4CE141034AD005B7F0C /* MetaAllocator.cpp */,
</span><span class="cx"> 93A427AC180DA60F00CD24D7 /* MoveOnly.h */,
</span><ins>+ 1AFDE6541953B2C000C48FFA /* Optional.cpp */,
</ins><span class="cx"> 0FC6C4CB141027E0005B7F0C /* RedBlackTree.cpp */,
</span><span class="cx"> 93A427AA180DA26400CD24D7 /* Ref.cpp */,
</span><span class="cx"> 93A427AD180DA60F00CD24D7 /* RefLogger.h */,
</span><span class="lines">@@ -1312,6 +1315,7 @@
</span><span class="cx"> 7C8DDAAB1735DEEE00EA5AC0 /* CloseThenTerminate.cpp in Sources */,
</span><span class="cx"> CDC2C71517970DDB00E627FB /* TimeRanges.cpp in Sources */,
</span><span class="cx"> 51FCF79A1534AC6D00104491 /* ShouldGoToBackForwardListItem.cpp in Sources */,
</span><ins>+ 1AFDE6561953B2C000C48FFA /* Optional.cpp in Sources */,
</ins><span class="cx"> C540F776152E4DA000A40C8C /* SimplifyMarkup.mm in Sources */,
</span><span class="cx"> C02B77F2126612140026BF0F /* SpacebarScrolling.cpp in Sources */,
</span><span class="cx"> 93D3D19E17B1A84200C7C415 /* LayoutMilestonesWithAllContentInFrame.cpp in Sources */,
</span></span></pre></div>
<a id="trunkToolsTestWebKitAPITestsWTFOptionalcpp"></a>
<div class="addfile"><h4>Added: trunk/Tools/TestWebKitAPI/Tests/WTF/Optional.cpp (0 => 170187)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/TestWebKitAPI/Tests/WTF/Optional.cpp (rev 0)
+++ trunk/Tools/TestWebKitAPI/Tests/WTF/Optional.cpp 2014-06-20 16:35:36 UTC (rev 170187)
</span><span class="lines">@@ -0,0 +1,75 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+#include "config.h"
+
+#include <wtf/Optional.h>
+
+namespace TestWebKitAPI {
+
+TEST(WTF_Optional, Disengaged)
+{
+ {
+ Optional<int> optional;
+
+ EXPECT_FALSE(static_cast<bool>(optional));
+ }
+
+ {
+ Optional<int> optional { Nullopt };
+
+ EXPECT_FALSE(static_cast<bool>(optional));
+ }
+}
+
+TEST(WTF_Optional, Engaged)
+{
+ Optional<int> optional { 10 };
+
+ EXPECT_TRUE(static_cast<bool>(optional));
+ EXPECT_EQ(10, optional.value());
+}
+
+TEST(WTF_Optional, Destructor)
+{
+ static bool didCallDestructor = false;
+ struct A {
+ ~A()
+ {
+ EXPECT_FALSE(didCallDestructor);
+ didCallDestructor = true;
+ }
+ };
+
+ {
+ Optional<A> optional { InPlace };
+
+ EXPECT_TRUE(static_cast<bool>(optional));
+ }
+
+ EXPECT_TRUE(didCallDestructor);
+}
+
+} // namespace TestWebKitAPI
</ins></span></pre>
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