<div dir="ltr">On Fri, Apr 19, 2013 at 12:18 PM, Pedro Delgado Perez <span dir="ltr"><<a href="mailto:pedro.delgadoperez@mail.uca.es" target="_blank">pedro.delgadoperez@mail.uca.es</a>></span> wrote:<br><div class="gmail_extra">
<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<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" target="_blank">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></div></blockquote><div><br></div><div style>All of the ways you cite make sense. What you want really depends on what kind of control you want. Note that you can always easily start with AST matchers to find higher level things you're interested in, and then drill down through the AST nodes by calling the methods or even by using a RecursiveASTVisitor on a node...</div>
<div style><br></div><div style>Cheers,</div><div style>/Manuel</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<p>Please, I need a path to get down to work.</p>
<p>Thanks in advance,</p><div class="im">
<p>Pedro.</p>
<br>
<div><em>El dia 19 abr 2013 01:58, Gábor Kozár <<a href="mailto:kozargabor@gmail.com" target="_blank">kozargabor@gmail.com</a>> escribió:</em></div><blockquote 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" target="_blank">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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