How to Provide C Source Code Files as Input to RecursiveASTVisitor based CLANG Tool

Clang Frontend
#1

Hello,

I was able to setup and execute the sample provided on http://clang.llvm.org/docs/RAVFrontendAction.html

The sample tool can be executed using the code as a string argument.

Wanted to know if there is a way we can provide the C-source code files as an argument to this main function (in FindClassDecls.cpp).

Disclaimer: I have just started on Clang.

Regards,

Sunny. R. Billava

Sr. TechLead - AESBU | Powertrain Practice

Phone: +91-20-6652 5000 Ext. 2813 | Cell: +91-9561 125 413 | E-mail: sunny.billava@kpit.com

#2

Hi Sunny,

you can do as follows:

static cl::OptionCategory MySampleCategory(“clang-tool options”);

int main(int argc, const char *argv[])
{
CommonOptionsParser OptionsParser(argc, argv, MySampleCategory);
ClangTool Tool(OptionsParser.getCompilations(), OptionsParser.getSourcePathList());

return Tool.run(newFrontendActionFactory().get());
}

Take a look at Matchers as well. It might be more handy for you:
http://clang.llvm.org/docs/LibASTMatchersTutorial.html#intermezzo-learn-ast-matcher-basics

Of course, you could also just read the specified files into a string variable and pass it to runToolOnCode:

std::string FileContent;
// fill it from the files specified in argv

runToolOnCode(new FindNamedClassAction, FileContent);