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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The source of the failure is where you have SameType(recordDecl(…)). You’ll notice in the reference that recordDecl() returns a Matcher<Decl>. So your SameType()
matcher is going to receive a ‘Decl’ as input. You’ll need to explicitly change this into a FieldDecl. I’m afraid I don’t know exactly what you’re trying to match or what IHD is so I can’t tell if there’s a more fundamental error here.<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></a></p>
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<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""> cfe-dev-bounces@cs.uiuc.edu [mailto:cfe-dev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Daniel Quiñones Lopez<br>
<b>Sent:</b> Monday, September 23, 2013 11:18 AM<br>
<b>To:</b> cfe-dev@cs.uiuc.edu<br>
<b>Subject:</b> [cfe-dev] Problem using ast matchers macros<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">I'm trying to implement an ast matcher for the IHD (hidden variable deletion) operator. For this purpose, i also define two matchers using the ast macros. The
code is as follows:<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">namespace clang{<br>
namespace ast_matchers{<br>
using namespace clang::ast_matchers::internal;<br>
<br>
// Checks that two FieldDecl nodes have the same type<br>
AST_MATCHER_P(FieldDecl, SameType, FieldDecl, f)<br>
{<br>
return Node.getType() == f.getType();<br>
}<br>
<br>
// Checks that two FieldDecl nodes have the same name<br>
AST_MATCHER_P(FieldDecl, SameName, FieldDecl, f)<br>
{<br>
return Node.getName() == f.getName();<br>
}<br>
<br>
<br>
}<br>
}<o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">And the code for the IHD operator is:<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">DeclarationMatcher IHD__Matcher = recordDecl(<br>
has(<br>
fieldDecl().bind("IHD")<br>
),<br>
isDerivedFrom(<br>
SameName(<br>
SameType(<br>
recordDecl(<br>
has(<br>
fieldDecl()<br>
)<br>
)<br>
)<br>
)<br>
)<br>
);<o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">The problem is that when i compile i get the following errors:<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">clang++ -I/usr/local/include -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -g -fvisibility-inlines-hidden -fno-exceptions
-fno-rtti -fPIC -Woverloaded-virtual -Wcast-qual -fno-rtti -c -o IHD_operator.o IHD_operator.cpp<br>
IHD_operator.cpp:83:6: error: no matching function for call to 'SameType'<br>
SameType(<br>
^~~~~~~~<br>
IHD_operator.cpp:39:28: note: candidate function not viable: no known conversion from 'clang::ast_matchers::internal::BindableMatcher<clang::Decl>' to<br>
'const clang::FieldDecl' for 1st argument<br>
AST_MATCHER_P(FieldDecl, SameType, FieldDecl, f)<br>
^<br>
/usr/local/include/clang/ASTMatchers/ASTMatchersMacros.h:86:32: note: expanded from macro 'AST_MATCHER_P'<br>
AST_MATCHER_P_OVERLOAD(Type, DefineMatcher, ParamType, Param, 0)<br>
^<br>
/usr/local/include/clang/ASTMatchers/ASTMatchersMacros.h:104:34: note: expanded from macro 'AST_MATCHER_P_OVERLOAD'<br>
inline internal::Matcher<Type> DefineMatcher(const ParamType &Param) { \<br>
^<br>
1 error generated.<br>
make: *** [IHD_operator.o] Error 1<o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">I don't know why is trying to make a conversion to FieldDecl from Decl if it is supose to be receiving a FieldDecl type param.<o:p></o:p></span></p>
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