<div dir="ltr"><div dir="ltr"><span style="font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif">Aditya,</span><div><font face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif"><br></font></div><div><font face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">You are implementing VisitFunctionDecl, which visits only function declarations, and not uses (e.g.: call expressions).</font></div><div><font face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif"><br>If you are interested in call expressions you can either implement VisitCallExpr or use an AST Matcher (<a href="https://clang.llvm.org/docs/LibASTMatchersTutorial.html" target="_blank">https://clang.llvm.org/docs/LibASTMatchersTutorial.html</a>).</font></div><div><table cellpadding="0" class="m_-5579668829712939783gmail-cf m_-5579668829712939783gmail-gJ" style="border-collapse:collapse;margin-top:0px;width:auto;display:block"><tbody style="display:block"></tbody></table></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Jan 12, 2019 at 1:58 PM Aditya Atluri <<a href="mailto:adityaavinash1@gmail.com" target="_blank">adityaavinash1@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Good eye! Fixed it. Thank you!</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">Hi,</div><div class="gmail_default" style="font-family:tahoma,sans-serif">When I run the program, I am seeing the Function add is being visited once (even though called twice). Attached test case and source code.</div><div class="gmail_default" style="font-family:tahoma,sans-serif">Here is the output from the program:</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">In HandleTopLevelDecl</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">Visiting Function add it has: 2 arguments</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">The argument types are: </span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">const T</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">const T</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">In HandleTopLevelDecl</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">Visiting Function foo it has: 0 arguments</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">The argument types are: </span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">In HandleTopLevelDecl</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">Visiting Function main it has: 0 arguments</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">The argument types are: </span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">In HandleTopLevelDecl</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">Visiting Function add it has: 2 arguments</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">The argument types are: </span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">const float</span></p>
<p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco;color:rgb(235,235,235);background-color:rgb(38,44,53)"><span style="font-variant-ligatures:no-common-ligatures">const float</span></p><div><span style="font-variant-ligatures:no-common-ligatures"><br></span></div></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 11, 2019 at 2:24 PM João Paulo Labegalini de Carvalho <<a href="mailto:jaopaulolc@gmail.com" target="_blank">jaopaulolc@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Aditya,<div><br></div><div>In the call to setASTConsumer at line 99 should it not make an unique pointer of MyASTConsumer instead of clang::ASTConsumer?</div><div><span style="color:rgb(0,0,0);font-family:"Courier New",Courier,monospace,arial,sans-serif;font-size:14px;white-space:pre-wrap"><br></span></div><div><span style="color:rgb(0,0,0);font-family:"Courier New",Courier,monospace,arial,sans-serif;font-size:14px;white-space:pre-wrap">ci.setASTConsumer(llvm::make_unique<<b>clang::ASTConsumer</b>>());
</span></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 11, 2019 at 6:04 PM Aditya Atluri via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Attached updated source code.</div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 11, 2019 at 2:03 PM Aditya Atluri <<a href="mailto:adityaavinash1@gmail.com" target="_blank">adityaavinash1@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Hi,</div><div class="gmail_default" style="font-family:tahoma,sans-serif">On a second note, the code builds fine; but when I run the program it exits without any output. I added my own FunctionDecl visitor to MyRecursiveASTVisitor. I am guessing the code I am missing can be something to do with headers and methods which are tagged `XX` as prefix or suffix like, DeclXX.h or StmtXX.h or so.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 11, 2019 at 1:59 PM Aditya Atluri <<a href="mailto:adityaavinash1@gmail.com" target="_blank">adityaavinash1@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Great! The post helped me figure out the right sequence of syntax to use.</div><div class="gmail_default" style="font-family:tahoma,sans-serif">Here is how I figured it out. </div><div class="gmail_default" style="font-family:tahoma,sans-serif">greped for LangOptions on clang/FrontEnd headers, found that CompilerInvocation takes LangOptions as an argument in one of its methods; CompilerInstance has a method to get its own instance of CompilerInvocation.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 11, 2019 at 1:26 PM Keane, Erich via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail-m_466994200207845368gmail-m_3706668914326854681gmail-m_6880069343091582755gmail-m_-5138782984679250637gmail-m_-8468080005812937690WordSection1">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><a href="https://stackoverflow.com/questions/38356485/how-do-i-put-clang-into-c-mode" target="_blank">https://stackoverflow.com/questions/38356485/how-do-i-put-clang-into-c-mode</a><u></u><u></u></span></p>
<p class="MsoNormal"><a name="m_-5579668829712939783_m_-3224468879155511887_m_466994200207845368_m_3706668914326854681_m_6880069343091582755_m_-5138782984679250637_m_-8468080005812937690__MailEndCompose"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></a></p>
<p class="MsoNormal"><a name="m_-5579668829712939783_m_-3224468879155511887_m_466994200207845368_m_3706668914326854681_m_6880069343091582755_m_-5138782984679250637_m_-8468080005812937690______replyseparator"></a><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"> Aditya Atluri [mailto:<a href="mailto:adityaavinash1@gmail.com" target="_blank">adityaavinash1@gmail.com</a>]
<br>
<b>Sent:</b> Friday, January 11, 2019 11:09 AM<br>
<b>To:</b> Keane, Erich <<a href="mailto:erich.keane@intel.com" target="_blank">erich.keane@intel.com</a>><br>
<b>Cc:</b> Clang Dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>><br>
<b>Subject:</b> Re: [cfe-dev] Fwd: [LibTooling] Unable to parse cpp code when using libtooling feature<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">Hi Keane,<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">Exactly my thoughts. But, how to do it?<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Fri, Jan 11, 2019 at 1:05 PM Keane, Erich via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>> wrote:<u></u><u></u></p>
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<blockquote style="border-style:none none none solid;border-left-width:1pt;border-left-color:rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
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<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Those are typical of attempting to compile C++ code as C. I’m not sure what the right way to set the
LangOpts on CompilerInstance in libclang is, but you likely need to update those to set LangOpts correctly for the version of C++ you intend to support..</span><u></u><u></u></p>
<p class="MsoNormal"><a name="m_-5579668829712939783_m_-3224468879155511887_m_466994200207845368_m_3706668914326854681_m_6880069343091582755_m_-5138782984679250637_m_-8468080005812937690_m_-935037018428394354__MailEndCompose"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span></a><u></u><u></u></p>
<p class="MsoNormal"><a name="m_-5579668829712939783_m_-3224468879155511887_m_466994200207845368_m_3706668914326854681_m_6880069343091582755_m_-5138782984679250637_m_-8468080005812937690_m_-935037018428394354______replyseparato"></a><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif">
cfe-dev [mailto:<a href="mailto:cfe-dev-bounces@lists.llvm.org" target="_blank">cfe-dev-bounces@lists.llvm.org</a>]
<b>On Behalf Of </b>Aditya Atluri via cfe-dev<br>
<b>Sent:</b> Friday, January 11, 2019 11:02 AM<br>
<b>To:</b> <a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a><br>
<b>Subject:</b> [cfe-dev] Fwd: [LibTooling] Unable to parse cpp code when using libtooling feature</span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">Hi,</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">I am a novice developer hacking around ways to use clang for parsing C/CPP code.</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif"> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">I am able to parse C code with clangs libtooling feature properly. But, when I use the code to parse CPP test code, I am getting the
following error:</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif"> </span><u></u><u></u></p>
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<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">$ ./Main </span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">test.cpp:1:1: error: unknown type name 'template'</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">template<typename T></span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">^</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">test.cpp:1:9: error: expected identifier or '('</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">template<typename T></span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)"> ^</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">test.cpp:6:19: error: expected expression</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)"> float c = add<float>(a, b);</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)"> ^</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)">test.cpp:6:15: error: use of undeclared identifier 'add'</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)"> float c = add<float>(a, b);</span><u></u><u></u></p>
<p style="margin:0in 0in 0.0001pt;background-color:rgb(38,44,53);font-stretch:normal">
<span style="font-size:8.5pt;font-family:Monaco,serif;color:rgb(235,235,235)"> ^</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif"> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif"> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">Attached: Main.mk (to build test), Main.cpp (Clang 8.0 based libtooling source), test.cpp (test case)</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif"> </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">Please let me know if I am doing anything bad or missing something.</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">The Makefile assumes that clang is installed in ~/llvm80</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">_______________________________________________<br>
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<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev</a><u></u><u></u></p>
</blockquote>
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<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- <u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:Tahoma,sans-serif">- Aditya Atluri</span><u></u><u></u></p>
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</div>
_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail-m_466994200207845368gmail-m_3706668914326854681gmail-m_6880069343091582755gmail-m_-5138782984679250637gmail_signature"><div dir="ltr"><div><div><span style="font-family:tahoma,sans-serif">- Aditya Atluri</span><br></div></div></div></div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail-m_466994200207845368gmail-m_3706668914326854681gmail-m_6880069343091582755gmail_signature"><div dir="ltr"><div><div><span style="font-family:tahoma,sans-serif">- Aditya Atluri</span><br></div></div></div></div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail-m_466994200207845368gmail-m_3706668914326854681gmail_signature"><div dir="ltr"><div><div><span style="font-family:tahoma,sans-serif">- Aditya Atluri</span><br></div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail-m_466994200207845368gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>João Paulo L. de Carvalho<br>Computer Science | IC-UNICAMP | Campinas , SP - Brazil</div><div><a href="mailto:jaopaulolc@gmail.com" target="_blank">jaopaulolc@gmail.com</a></div><div><a href="mailto:joao.carvalho@ic.unicamp.br" target="_blank">joao.carvalho@ic.unicamp.br</a><br><a href="mailto:j160924@dac.unicamp.br" target="_blank">j160924@dac.unicamp.br</a></div></div></div></div></div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail-m_-3224468879155511887gmail_signature"><div dir="ltr"><div><div><span style="font-family:tahoma,sans-serif">- Aditya Atluri</span><br></div></div></div></div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-5579668829712939783gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>João Paulo L. de Carvalho<br>Computer Science | IC-UNICAMP | Campinas , SP - Brazil</div><div><a href="mailto:jaopaulolc@gmail.com" target="_blank">jaopaulolc@gmail.com</a></div><div><a href="mailto:joao.carvalho@ic.unicamp.br" target="_blank">joao.carvalho@ic.unicamp.br</a><br><a href="mailto:j160924@dac.unicamp.br" target="_blank">j160924@dac.unicamp.br</a></div></div></div></div></div>