Bug 201489 – [Win][Clang] InspectorNetworkAgent.cpp(1122,20): error: cannot decompose this type; 'std::tuple_size<const WTF::KeyValuePair<WTF::String, WTF::RefPtr<WTF::JSONImpl::Value, WTF::DumbPtrTraits<WTF::JSONImpl::Value> > >>::value' is not a valid integral const

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector

[Fujii Hironori]

I'm using clang-cl to build WinCairo. It can't compile since r249504 (Bug 201262).

> [5/35] Building CXX object Source\WebCore\CMakeFiles\WebCore.dir\__\__\WebCore\DerivedSources\unified-sources\UnifiedSource-84c9f43f-6.cpp.obj
> FAILED: Source/WebCore/CMakeFiles/WebCore.dir/__/__/WebCore/DerivedSources/unified-sources/UnifiedSource-84c9f43f-6.cpp.obj
> C:\PROGRA~1\LLVM\bin\clang-cl.exe  /nologo -TP -DANGLE_ENABLE_D3D11 -DANGLE_ENABLE_D3D9 -DANGLE_ENABLE_ESSL -DANGLE_ENABLE_HLSL -DBUILDING_WITH_CMAKE=1 -DBUILDING_WebCore -DEGL_EGLEXT_PROTOTYPES -DEGL_EGL_PROTOTYPES=1 -DGL_API="" -DGL_APICALL="" -DGL_GLES_PROTOTYPES=1 -DGL_GLEXT_PROTOTYPES -DHAVE_CONFIG_H=1 -DNOMINMAX -DSTATICALLY_LINKED_WITH_PAL=1 -DUNICODE -DWINVER=0x601 -DWTF_PLATFORM_WIN_CAIRO=1 -D_CRT_SECURE_NO_WARNINGS -D_HAS_EXCEPTIONS=0 -D_UNICODE -D_WIN32_WINNT=0x601 -D_WINDOWS -D_WINSOCKAPI_="" -D__STDC_CONSTANT_MACROS -IPAL\Headers -IDerivedSources\ForwardingHeaders -I. -IWebCore\DerivedSources -I..\..\Source\WebCore -I..\..\Source\WebCore\Modules\airplay -I..\..\Source\WebCore\Modules\applepay -I..\..\Source\WebCore\Modules\applepay\paymentrequest -I..\..\Source\WebCore\Modules\applicationmanifest -I..\..\Source\WebCore\Modules\beacon -I..\..\Source\WebCore\Modules\cache -I..\..\Source\WebCore\Modules\credentialmanagement -I..\..\Source\WebCore\Modules\encryptedmedia -I..\..\Source\WebCore\Modules\encryptedmedia\legacy -I..\..\Source\WebCore\Modules\entriesapi -I..\..\Source\WebCore\Modules\fetch -I..\..\Source\WebCore\Modules\geolocation -I..\..\Source\WebCore\Modules\indexeddb -I..\..\Source\WebCore\Modules\indexeddb\client -I..\..\Source\WebCore\Modules\indexeddb\server -I..\..\Source\WebCore\Modules\indexeddb\shared -I..\..\Source\WebCore\Modules\mediacapabilities -I..\..\Source\WebCore\Modules\mediacontrols -I..\..\Source\WebCore\Modules\mediarecorder -I..\..\Source\WebCore\Modules\mediasession -I..\..\Source\WebCore\Modules\mediasource -I..\..\Source\WebCore\Modules\mediastream -I..\..\Source\WebCore\Modules\mediastream\libwebrtc -I..\..\Source\WebCore\Modules\navigatorcontentutils -I..\..\Source\WebCore\Modules\notifications -I..\..\Source\WebCore\Modules\paymentrequest -I..\..\Source\WebCore\Modules\plugins -I..\..\Source\WebCore\Modules\quota -I..\..\Source\WebCore\Modules\speech -I..\..\Source\WebCore\Modules\streams -I..\..\Source\WebCore\Modules\webaudio -I..\..\Source\WebCore\Modules\webauthn -I..\..\Source\WebCore\Modules\webauthn\cbor -I..\..\Source\WebCore\Modules\webauthn\fido -I..\..\Source\WebCore\Modules\webdatabase -I..\..\Source\WebCore\Modules\webdriver -I..\..\Source\WebCore\Modules\webgpu -I..\..\Source\WebCore\Modules\webgpu\WHLSL -I..\..\Source\WebCore\Modules\webgpu\WHLSL\AST -I..\..\Source\WebCore\Modules\websockets -I..\..\Source\WebCore\Modules\webvr -I..\..\Source\WebCore\accessibility -I..\..\Source\WebCore\accessibility\isolatedtree -I..\..\Source\WebCore\animation -I..\..\Source\WebCore\bindings -I..\..\Source\WebCore\bindings\js -I..\..\Source\WebCore\bridge -I..\..\Source\WebCore\bridge\c -I..\..\Source\WebCore\bridge\jsc -I..\..\Source\WebCore\contentextensions -I..\..\Source\WebCore\crypto -I..\..\Source\WebCore\crypto\algorithms -I..\..\Source\WebCore\crypto\keys -I..\..\Source\WebCore\crypto\parameters -I..\..\Source\WebCore\css -I..\..\Source\WebCore\css\parser -I..\..\Source\WebCore\css\typedom -I..\..\Source\WebCore\cssjit -I..\..\Source\WebCore\dom -I..\..\Source\WebCore\dom\messageports -I..\..\Source\WebCore\domjit -I..\..\Source\WebCore\editing -I..\..\Source\WebCore\fileapi -I..\..\Source\WebCore\history -I..\..\Source\WebCore\html -I..\..\Source\WebCore\html\canvas -I..\..\Source\WebCore\html\forms -I..\..\Source\WebCore\html\parser -I..\..\Source\WebCore\html\shadow -I..\..\Source\WebCore\html\track -I..\..\Source\WebCore\inspector -I..\..\Source\WebCore\inspector\agents -I..\..\Source\WebCore\inspector\agents\page -I..\..\Source\WebCore\inspector\agents\worker -I..\..\Source\WebCore\layout -I..\..\Source\WebCore\layout\blockformatting -I..\..\Source\WebCore\layout\displaytree -I..\..\Source\WebCore\layout\floats -I..\..\Source\WebCore\layout\inlineformatting -I..\..\Source\WebCore\layout\inlineformatting\text -I..\..\Source\WebCore\layout\layouttree -I..\..\Source\WebCore\loader -I..\..\Source\WebCore\loader\appcache -I..\..\Source\WebCore\loader\archive -I..\..\Source\WebCore\loader\archive\mhtml -I..\..\Source\WebCore\loader\cache -I..\..\Source\WebCore\loader\icon -I..\..\Source\WebCore\mathml -I..\..\Source\WebCore\page -I..\..\Source\WebCore\page\animation -I..\..\Source\WebCore\page\csp -I..\..\Source\WebCore\page\scrolling -I..\..\Source\WebCore\platform -I..\..\Source\WebCore\platform\animation -I..\..\Source\WebCore\platform\audio -I..\..\Source\WebCore\platform\encryptedmedia -I..\..\Source\WebCore\platform\gamepad -I..\..\Source\WebCore\platform\graphics -I..\..\Source\WebCore\platform\graphics\cpu\arm -I..\..\Source\WebCore\platform\graphics\cpu\arm\filters -I..\..\Source\WebCore\platform\graphics\displaylists -I..\..\Source\WebCore\platform\graphics\filters -I..\..\Source\WebCore\platform\graphics\iso -I..\..\Source\WebCore\platform\graphics\opentype -I..\..\Source\WebCore\platform\graphics\transforms -I..\..\Source\WebCore\platform\mediacapabilities -I..\..\Source\WebCore\platform\mediarecorder -I..\..\Source\WebCore\platform\mediasession -I..\..\Source\WebCore\platform\mediastream -I..\..\Source\WebCore\platform\mediastream\libwebrtc -I..\..\Source\WebCore\platform\mock -I..\..\Source\WebCore\platform\mock\mediasource -I..\..\Source\WebCore\platform\network -I..\..\Source\WebCore\platform\sql -I..\..\Source\WebCore\platform\text -I..\..\Source\WebCore\platform\vr -I..\..\Source\WebCore\plugins -I..\..\Source\WebCore\rendering -I..\..\Source\WebCore\rendering\line -I..\..\Source\WebCore\rendering\mathml -I..\..\Source\WebCore\rendering\shapes -I..\..\Source\WebCore\rendering\style -I..\..\Source\WebCore\rendering\svg -I..\..\Source\WebCore\rendering\updating -I..\..\Source\WebCore\replay -I..\..\Source\WebCore\storage -I..\..\Source\WebCore\style -I..\..\Source\WebCore\svg -I..\..\Source\WebCore\svg\animation -I..\..\Source\WebCore\svg\graphics -I..\..\Source\WebCore\svg\graphics\filters -I..\..\Source\WebCore\svg\properties -I..\..\Source\WebCore\websockets -I..\..\Source\WebCore\workers -I..\..\Source\WebCore\workers\service -I..\..\Source\WebCore\workers\service\context -I..\..\Source\WebCore\workers\service\server -I..\..\Source\WebCore\worklets -I..\..\Source\WebCore\xml -I..\..\Source\WebCore\xml\parser -I..\..\Source\WebCore\platform\graphics\gpu -I..\include\private -I..\include\private\JavaScriptCore -I..\..\Source\WebCore\accessibility\win -I..\..\Source\WebCore\page\win -I..\..\Source\WebCore\platform\graphics\egl -I..\..\Source\WebCore\platform\graphics\opengl -I..\..\Source\WebCore\platform\graphics\win -I..\..\Source\WebCore\platform\network\win -I..\..\Source\WebCore\platform\win -I..\..\Source\WebCore\platform\cf -I..\..\Source\WebCore\platform\cf\win -I..\..\Source\WebCore\platform\graphics\cairo -I..\..\Source\WebCore\platform\network\curl -I..\..\Source\WebCore\platform\image-decoders -I..\..\Source\WebCore\platform\image-decoders\bmp -I..\..\Source\WebCore\platform\image-decoders\gif -I..\..\Source\WebCore\platform\image-decoders\ico -I..\..\Source\WebCore\platform\image-decoders\jpeg -I..\..\Source\WebCore\platform\image-decoders\jpeg2000 -I..\..\Source\WebCore\platform\image-decoders\png -I..\..\Source\WebCore\platform\image-decoders\webp -I..\..\Source\WebCore\platform\graphics\texmap -I..\..\Source\WebCore\platform\graphics\nicosia -I..\..\Source\WebCore\loader\archive\cf -IJavaScriptCore\Headers -IJavaScriptCore\PrivateHeaders -IWTF\Headers -IDerivedSources -I..\..\Source\ThirdParty -IANGLE\Headers -I..\..\WebKitLibraries\win\include -I..\..\WebKitLibraries\win\include\cairo /W4 -fdiagnostics-color=always -fcolor-diagnostics -Wno-parentheses-equality -Wno-noexcept-type -Qunused-arguments -Wwrite-strings -Wundef -Wpointer-arith -Wmissing-format-attribute -Wformat-security -Wcast-align -Wno-unknown-argument -Wno-nonportable-include-path -Wno-unknown-pragmas -Wno-macro-redefined -Wno-undef /DWIN32 /D_WINDOWS  /GR- /EHsc- -fno-strict-aliasing /MD /Zi /Ob0 /Od /RTC1   /bigobj /wd4018 /wd4068 /wd4099 /wd4100 /wd4127 /wd4138 /wd4146 /wd4180 /wd4189 /wd4201 /wd4206 /wd4244 /wd4251 /wd4267 /wd4275 /wd4288 /wd4291 /wd4305 /wd4309 /wd4344 /wd4355 /wd4389 /wd4396 /wd4456 /wd4457 /wd4458 /wd4459 /wd4481 /wd4503 /wd4505 /wd4510 /wd4512 /wd4530 /wd4610 /wd4611 /wd4646 /wd4702 /wd4706 /wd4722 /wd4800 /wd4819 /wd4951 /wd4952 /wd4996 /wd6011 /wd6031 /wd6211 /wd6246 /wd6255 /wd6387 /Zi /GS /EHa- /EHc- /EHs- /fp:except- /analyze- /bigobj /utf-8 /validate-charset -fmsc-version=1911 -std:c++17 /Yu"WebCorePrefix.h" /FI"WebCorePrefix.h" /Fp"C:/webkit/gc/WebKitBuild/Debug/Source/WebCore/WebCore_SOURCES/WebCorePrefix.pch" /showIncludes /FoSource\WebCore\CMakeFiles\WebCore.dir\__\__\WebCore\DerivedSources\unified-sources\UnifiedSource-84c9f43f-6.cpp.obj /Fdlib64\WebCore.pdb -c WebCore\DerivedSources\unified-sources\UnifiedSource-84c9f43f-6.cpp
> In file included from WebCore\DerivedSources\unified-sources\UnifiedSource-84c9f43f-6.cpp:1:
> ..\..\Source\WebCore\inspector/agents/InspectorNetworkAgent.cpp(1122,20): error: cannot decompose this type; 'std::tuple_size<const WTF::KeyValuePair<WTF::String, WTF::RefPtr<WTF::JSONImpl::Value, WTF::DumbPtrTraits<WTF::JSONImpl::Value> > >>::value' is not a valid integral constant expression
>         for (auto& [key, value] : *headers) {
>                    ^
> 1 error generated.


> > clang-cl --version
> clang version 8.0.0 (tags/RELEASE_800/final)
> Target: x86_64-pc-windows-msvc
> Thread model: posix
> InstalledDir: C:\Program Files\LLVM\bin

[Fujii Hironori]

https://stackoverflow.com/q/53721714

[Fujii Hironori]

https://twitter.com/ciura_victor/status/1027291662526177282

> At the moment structured bindings are not fully usable in Clang/LLVM for Windows.

[Fujii Hironori]

There is no snapshot clang-cl binary including the fix at the moment. I'm going to fix WebKit code at the moment.

[Fujii Hironori]

Created attachment 378043 [details]
Patch

[Fujii Hironori]

Comment on attachment 378043 [details]
Patch

Clearing flags on attachment: 378043

Committed r249524: <https://trac.webkit.org/changeset/249524>

[Fujii Hironori]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/55056206>

[Joseph Pecoraro]

Interesting. Thanks for addressing.