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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m a software developer and in my company we use clang to parse c++ code.<o:p></o:p></p>
<p class="MsoNormal">I’m in trouble to go to a call back when I’m using an AST matcher.<o:p></o:p></p>
<p class="MsoNormal">Here is the problem:<o:p></o:p></p>
<p class="MsoNormal">I already use the function “ clang::ast_matchers::MatchFinder::matchAST(ASTContext&)” and it works perfectly. But, in a particular case, I would like to match only within a subtree so I try to use “ clang::ast_matchers::MatchFinder::match(constT
&node, ASTContext&)” but I never reach my callback.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here a sample of a source code<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">clang::ast_matchers::</span><span style="font-size:9.5pt;font-family:Consolas;color:#4EC9B0">MatchFinder</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">matcherFinder;</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">matcherFinder.addMatcher(binaryOperatorMatcher</span><span style="font-size:9.5pt;font-family:Consolas;color:#B4B4B4">,</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#569CD6">new</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#4EC9B0">MatchCallback</span><span style="font-size:9.5pt;font-family:Consolas;color:black">(</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">[&cleanListField](cla::</span><span style="font-size:9.5pt;font-family:Consolas;color:#4EC9B0">MatchFinder</span><span style="font-size:9.5pt;font-family:Consolas;color:black">::</span><span style="font-size:9.5pt;font-family:Consolas;color:#4EC9B0">MatchResult</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#569CD6">const</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">& matchRes)</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">{</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#569CD6">auto</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">binaryOperator = matchRes.Nodes.getNodeAs<clang::</span><span style="font-size:9.5pt;font-family:Consolas;color:#4EC9B0">Stmt</span><span style="font-size:9.5pt;font-family:Consolas;color:black">>(binaryOperatorNode);</span><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:black">binaryOperator->dumpColor();<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black"> }));<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black"> matcherFinder.match((*constructor), constructor->getASTContext());<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:gainsboro">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#57A64A">//matcherFinder.matchAST(constructor->getASTContext());<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:#57A64A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">As we can see in the example, the subtree root is a clang::CXXConstructorDecl.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Thanks you in advance.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Best regards.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial Narrow",sans-serif">Anthony LEFORT</span></b><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial Narrow",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray">Software engineer</span><span lang="EN-GB" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray">3 rue Marcel Allégot</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray">92190 Meudon - France</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif">CAST,
<span style="color:gray">Leader in Automated Application Intelligence</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray">Achieve Insight. Deliver Excellence.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:8.0pt;font-family:"Arial",sans-serif"><a href="http://www.castsoftware.com/"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Calibri",sans-serif;color:purple">www.castsoftware.com</span></a></span><span lang="FR">
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</span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray">Gain visibility into application quality to proactively manage risk and improve team performance.</span><span lang="EN-GB" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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