ASTMatchers: isVirtual and isOverride

Clang Frontend
1

Hi,

I’m newbie using ASTMatchers and I’m trying to learn little by little how to use them.

I was basing on the matcher recordDecl(hasName(“Foo”), isDerivedFrom(“Bar”)) shown in http://clang.llvm.org/docs/LibASTMatchers.html trying to include new features. For instance, I tried to look for classes which have at least one virtual method:

recordDecl(hasName(“Foo”), isDerivedFrom(“Bar”), hasMethod(isVirtual()))

Or I tried to match protected overriden methods:

methodDecl(allOf(isProtected(), isOverride());

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.

Finally, I tried to look for the the default constructor of a certain class:

constructorDecl(hasName(“Foo”), isDefaultConstructor())

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.

Thanks in advance,

Pedro.

2

Hi,

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: http://llvm.org/svn/llvm-project/cfe/trunk/include/clang/ASTMatchers/ASTMatchers.h).

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).

Gabor