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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Sometimes it’s possible to reason with the open source community, then they change their code and make modifications which accommodate the various compilers.
E.g. we could ask chromium team if they could use the operator symbol instead of ‘and’.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Nico Weber [mailto:thakis@google.com]
<br>
<b>Sent:</b> Thursday, May 25, 2017 12:56 PM<br>
<b>To:</b> Keane, Erich <erich.keane@intel.com><br>
<b>Cc:</b> Blower, Melanie <melanie.blower@intel.com>; rnk <rnk@chromium.org>; cfe-commits <cfe-commits@lists.llvm.org>; Hans Wennborg <hans@chromium.org><br>
<b>Subject:</b> Re: r303798 - For Microsoft compatibility, set fno_operator_names<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, May 25, 2017 at 12:18 PM, Keane, Erich <<a href="mailto:erich.keane@intel.com" target="_blank">erich.keane@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">How does chromium compiler in CL? It seems that it would have a similar problem here…</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">That's a good question! It looks like iso646.h is included, and in MSVC that contains something like `#define and &&`. But clang's lib/Headers/iso646.h assumes that the compiler provides this and doesn't define `and`. So for the reland,
that header would have to check if the operator name is disabled, and if so, define it. (Or, better, maybe we can come up with something more targeted for the system header, similar to e.g.
<a href="http://llvm.org/viewvc/llvm-project?view=revision&revision=212238">http://llvm.org/viewvc/llvm-project?view=revision&revision=212238</a>)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for the revert!<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a href="mailto:thakis@google.com" target="_blank">thakis@google.com</a> [mailto:<a href="mailto:thakis@google.com" target="_blank">thakis@google.com</a>]
<b>On Behalf Of </b>Nico Weber<br>
<b>Sent:</b> Thursday, May 25, 2017 9:16 AM<br>
<b>To:</b> Blower, Melanie <<a href="mailto:melanie.blower@intel.com" target="_blank">melanie.blower@intel.com</a>><br>
<b>Cc:</b> rnk <<a href="mailto:rnk@chromium.org" target="_blank">rnk@chromium.org</a>>; Keane, Erich <<a href="mailto:erich.keane@intel.com" target="_blank">erich.keane@intel.com</a>>; cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>>;
Hans Wennborg <<a href="mailto:hans@chromium.org" target="_blank">hans@chromium.org</a>></span><o:p></o:p></p>
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<p class="MsoNormal"><br>
<b>Subject:</b> RE: r303798 - For Microsoft compatibility, set fno_operator_names<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In addition to this making clang-cl silently accept invalid code, it also breaks existing valid code, building chromium now fails. Let's revert and come up with something better
asynchronously.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white">FAILED: obj/third_party/WebKit/Source/core/dom/dom/CustomElementRegistry.obj
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white">E:\b\c\goma_client/gomacc.exe ../../third_party/llvm-build/Release+Asserts/bin/clang-cl.exe /nologo /showIncludes /FC @obj/third_party/WebKit/Source/core/dom/dom/CustomElementRegistry.obj.rsp
/c ../../third_party/WebKit/Source/core/dom/custom/CustomElementRegistry.cpp /Foobj/third_party/WebKit/Source/core/dom/dom/CustomElementRegistry.obj /Fd"obj/third_party/WebKit/Source/core/dom/dom_cc.pdb"</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white">E:\b\c\b\win_clang\src\third_party\WebKit\Source\core\dom\custom\CustomElementRegistry.cpp(229,7): error: unknown type
name 'definition'</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white"> if (definition and definition->Descriptor().LocalName() == desc.LocalName()) {</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white"> ^</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white">E:\b\c\b\win_clang\src\third_party\WebKit\Source\core\dom\custom\CustomElementRegistry.cpp(229,18): error: variable declaration
in condition must have an initializer</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white"> if (definition and definition->Descriptor().LocalName() == desc.LocalName()) {</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white"> ^</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New";background:white">2 errors generated.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On May 24, 2017 4:01 PM, "Blower, Melanie" <<a href="mailto:melanie.blower@intel.com" target="_blank">melanie.blower@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks for the feedback, working on it…</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Keane, Erich
<br>
<b>Sent:</b> Wednesday, May 24, 2017 3:47 PM<br>
<b>To:</b> Nico Weber <<a href="mailto:thakis@chromium.org" target="_blank">thakis@chromium.org</a>>; Blower, Melanie <<a href="mailto:melanie.blower@intel.com" target="_blank">melanie.blower@intel.com</a>></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
<b>Cc:</b> cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>>; rnk <<a href="mailto:rnk@chromium.org" target="_blank">rnk@chromium.org</a>></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Subject:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> RE: r303798 - For Microsoft
compatibility, set fno_operator_names</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Adding Melanie, the author of the patch.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a name="m_-5951069200774899918_m_842737365194708"></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a href="mailto:thakis@google.com" target="_blank">thakis@google.com</a> [<a href="mailto:thakis@google.com" target="_blank">mailto:thakis@google.com</a>]
<b>On Behalf Of </b>Nico Weber<br>
<b>Sent:</b> Wednesday, May 24, 2017 12:43 PM<br>
<b>To:</b> Keane, Erich <<a href="mailto:erich.keane@intel.com" target="_blank">erich.keane@intel.com</a>><br>
<b>Cc:</b> cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>>; rnk <<a href="mailto:rnk@chromium.org" target="_blank">rnk@chromium.org</a>><br>
<b>Subject:</b> Re: r303798 - For Microsoft compatibility, set fno_operator_names</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Reviewed here: <a href="https://reviews.llvm.org/D33505" target="_blank">https://reviews.llvm.org/D33505</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
Still, please make this warn.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Wed, May 24, 2017 at 3:42 PM, Nico Weber <<a href="mailto:thakis@google.com" target="_blank">thakis@google.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Was this reviewed somewhere?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Please make it so that this emits a warning. We want clang-cl to warn on invalid code (and in system headers warnings are suppressed).<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Wed, May 24, 2017 at 3:31 PM, Erich Keane via cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Author: erichkeane<br>
Date: Wed May 24 14:31:19 2017<br>
New Revision: 303798<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=303798&view=rev" target="_blank">
http://llvm.org/viewvc/llvm-project?rev=303798&view=rev</a><br>
Log:<br>
For Microsoft compatibility, set fno_operator_names<br>
<br>
There's a Microsoft header in the Windows SDK which won't<br>
compile with clang because it uses an operator name (and)<br>
as a field name. This patch allows that file to compile by<br>
setting the option which disables operator names.<br>
The header which doesn't compile <Query.h> C:/Program Files (x86)/<br>
Windows Kits/10/include/10.0.14393.0/um\Query.h:259:40:<br>
error: expected member name or ';' after declaration specifiers<br>
<br>
/* [case()] */ NODERESTRICTION or;<br>
~~~~~~~~~~~~~~~ ^<br>
<br>
1 error generated.<br>
<br>
Contributed for Melanie Blower<br>
<br>
Differential Revision:<a href="https://reviews.llvm.org/D33505" target="_blank">https://reviews.llvm.org/D33505</a><br>
<br>
Modified:<br>
cfe/trunk/lib/Frontend/CompilerInvocation.cpp<br>
cfe/trunk/test/Parser/MicrosoftExtensions.cpp<br>
cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp<br>
<br>
Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=303798&r1=303797&r2=303798&view=diff" target="_blank">
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=303798&r1=303797&r2=303798&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)<br>
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Wed May 24 14:31:19 2017<br>
@@ -1882,7 +1882,7 @@ static void ParseLangArgs(LangOptions &O<br>
Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,<br>
Opts.GNUKeywords);<br>
<br>
- if (Args.hasArg(OPT_fno_operator_names))<br>
+ if (Args.hasArg(OPT_fno_operator_names) || Args.hasArg(OPT_fms_compatibility))<br>
Opts.CXXOperatorNames = 0;<br>
<br>
if (Args.hasArg(OPT_fcuda_is_device))<br>
<br>
Modified: cfe/trunk/test/Parser/MicrosoftExtensions.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Parser/MicrosoftExtensions.cpp?rev=303798&r1=303797&r2=303798&view=diff" target="_blank">
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Parser/MicrosoftExtensions.cpp?rev=303798&r1=303797&r2=303798&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/test/Parser/MicrosoftExtensions.cpp (original)<br>
+++ cfe/trunk/test/Parser/MicrosoftExtensions.cpp Wed May 24 14:31:19 2017<br>
@@ -261,9 +261,8 @@ int __identifier(else} = __identifier(fo<br>
#define identifier_weird(x) __identifier(x<br>
int k = identifier_weird(if)); // expected-error {{use of undeclared identifier 'if'}}<br>
<br>
-// This is a bit weird, but the alternative tokens aren't keywords, and this<br>
-// behavior matches MSVC. FIXME: Consider supporting this anyway.<br>
-extern int __identifier(and) r; // expected-error {{cannot convert '&&' token to an identifier}}<br>
+// 'and' is not an operator name with Microsoft compatibility.<br>
+extern int __identifier(and) r; // expected-error {{expected ';' after top level declarator}}<br>
<br>
void f() {<br>
__identifier(() // expected-error {{cannot convert '(' token to an identifier}}<br>
@@ -355,7 +354,6 @@ void TestProperty() {<br>
++sp.V11;<br>
}<br>
<br>
-//expected-warning@+1 {{C++ operator 'and' (aka '&&') used as a macro name}}<br>
#define and foo<br>
<br>
struct __declspec(uuid("00000000-0000-0000-C000-000000000046")) __declspec(novtable) IUnknown {};<br>
<br>
Modified: cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp?rev=303798&r1=303797&r2=303798&view=diff" target="_blank">
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp?rev=303798&r1=303797&r2=303798&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp (original)<br>
+++ cfe/trunk/test/Preprocessor/cxx_oper_keyword.cpp Wed May 24 14:31:19 2017<br>
@@ -1,5 +1,6 @@<br>
// RUN: %clang_cc1 %s -E -verify -DOPERATOR_NAMES<br>
// RUN: %clang_cc1 %s -E -verify -fno-operator-names<br>
+// RUN: %clang_cc1 %s -verify -DTESTWIN -fms-compatibility<br>
<br>
#ifndef OPERATOR_NAMES<br>
//expected-error@+3 {{token is not a valid binary operator in a preprocessor subexpression}}<br>
@@ -29,3 +30,14 @@<br>
#ifdef and<br>
#warning and is defined<br>
#endif<br>
+<br>
+#ifdef TESTWIN<br>
+// For cl compatibility, fno-operator-names is enabled by default.<br>
+int and;<br>
+int bitand;<br>
+int bitor;<br>
+int compl;<br>
+int not;<br>
+int or;<br>
+int xor;<br>
+#endif<br>
<br>
<br>
_______________________________________________<br>
cfe-commits mailing list<br>
<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a><br>
<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits</a><o:p></o:p></p>
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