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<p>Hi again,</p>
<p>Well, I've just understood that not all the methods in a class have a matcher related. For instance, I'm trying to match the default constructor declaration of a class:</p>
<p>class Foo {<br/>
public:<br/>
<strong>Foo(){}</strong><br/>
Foo(int a){... ...}<br/>
}</p>
<br/>
<p>And in CXXConstructorDecl we have isDefaultConstructor(), but I can't find an AST_MATCHER to do this. So, I suppose I would have to implement a new AST_MATCHER like this:</p>
<p><em>AST_MATCHER(CXXConstructorDecl, isDefaultConstructor){</em><br/>
<em>return Node.isDefaultConstructor();</em><br/>
<em>}</em></p>
<p>Wouldn't it? But, this happens often, so... would you recommend me use AST_MATCHERS? Or it would be better to do something like it is explained in <a href="http://clang.llvm.org/docs/RAVFrontendAction.html">http://clang.llvm.org/docs/RAVFrontendAction.html</a> ? This way, I can directly use the methods in the classes. For instance:</p>
<pre style="overflow-x: auto; overflow-y: hidden; border: thin dotted #0c3762; margin: 0px 0px 12px; padding: 0.8em; background-color: #f0f0f0; color: #333333;"> bool VisitCXXConstructorDecl(CXXConstructorDecl *Declaration) { if (Declaration->isDefaultConstructor()) {</pre><p>I have to visit a lot of kind of nodes with different features, not only this. </p>
<p>Please, I need a path to get down to work.</p>
<p>Thanks in advance,</p>
<p>Pedro.</p>
<br/>
<div><em>El dia 19 abr 2013 01:58, Gábor Kozár <kozargabor@gmail.com> escribió:</em></div><blockquote class="replyBlock" style="border-left: 2px solid #000083; margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div dir="ltr"><div><div><div>Hi,<br /><br /></div><p>What version are you using? The matchers isOverride() and isVirtual() I know for certain were not in version 3.2, and can only be found on SVN (in this file: <a href="http://llvm.org/svn/llvm-project/cfe/trunk/include/clang/ASTMatchers/ASTMatchers.h">http://llvm.org/svn/llvm-project/cfe/trunk/include/clang/ASTMatchers/ASTMatchers.h</a>).</p>
</div><p>Nonetheless, you can implement them all very easily manually, or just indeed copy their implementation from the link above. Also, instead of isDefaultConstructor(), you could use argumentCountIs(0).</p>
</div><p>Gabor</p>
</div><div class="gmail_extra"><br /><br /><div class="gmail_quote">2013/4/18 Pedro Delgado Perez <span dir="ltr"><<a href="mailto:pedro.delgadoperez@mail.uca.es" target="_blank">pedro.delgadoperez@mail.uca.es</a>></span><br /><blockquote class="gmail_quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;"><div><p>Hi,</p>
<p>I'm newbie using ASTMatchers and I'm trying to learn little by little how to use them.</p>
<p>I was basing on the matcher <span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">recordDecl(hasName("Foo"),</span><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify; background-color: #e2e2e2;"> </span><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">isDerivedFrom("Bar")) </span>shown in <a href="http://clang.llvm.org/docs/LibASTMatchers.html" target="_blank">http://clang.llvm.org/docs/LibASTMatchers.html</a> trying to include new features. For instance, I tried to look for classes which have at least one virtual method:</p>
<p><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">recordDecl(hasName("Foo"),</span><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify; background-color: #e2e2e2;"> </span><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">isDerivedFrom("Bar"), hasMethod(isVirtual()))</span></p>
<p>Or I tried to match protected overriden methods:</p>
<p><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">methodDecl(allOf(isProtected(), isOverride()</span><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">);</span></p>
<p>But neither of them worked as it couldn't find "isOverride" and "isVirtual" identifiers. I was trying a lot of combinations, but I can't understand this well.</p>
<p>Finally, I tried to look for the the default constructor of a certain class:</p>
<p><span style="color: #333333; font-family: monospace; font-size: 12px; line-height: 17px; text-align: justify;">constructorDecl(hasName("Foo"), isDefaultConstructor())</span></p>
<p>but this is wrong. What I'm doing bad? Please, any information you give me will be fine to me to understand how to use matchers.</p>
<p>Thanks in advance,</p>
<p>Pedro.</p>
<br/>
</div><br/>
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