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/*first line intentionally left blank.*/
/**********************************************************************************************************************/
/*included modules*/
/*standard library*/
#include <string>
#include <iostream>
#include <cassert>
/*LLVM-libs*/
#include "clang/AST/AST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Lex/Lexer.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Tooling.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/IR/Function.h"
/**********************************************************************************************************************/
/*used namespaces*/
using namespace llvm;
using namespace clang;
using namespace clang::ast_matchers;
using namespace clang::driver;
using namespace clang::tooling;
/**********************************************************************************************************************/
/*global vars*/
static llvm::cl::OptionCategory MatcherSampleCategory("Matcher Sample");
/**********************************************************************************************************************/
/*matcher callback for something.*/
class FunctionHandler : public MatchFinder::MatchCallback {
public:
FunctionHandler (Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR)
{
if (MR.Nodes.getNodeAs<clang::BinaryOperator>("binopeq") != nullptr)
{
/*underdev*/
/*get the matched node.*/
const BinaryOperator *BinOp = MR.Nodes.getNodeAs<clang::BinaryOperator>("binopeq");
/*get the sourceloation.*/
SourceLocation BinOpSL = BinOp->getLocStart();
/*does the sourcelocation include a macro expansion?*/
if ( BinOpSL.isMacroID() )
{
/*get the expansion range which is startloc and endloc*/
std::pair <SourceLocation, SourceLocation> expansionRange = Rewrite.getSourceMgr().getImmediateExpansionRange(BinOpSL);
/*get the startloc.*/
BinOpSL = expansionRange.first;
}
/*replace it.*/
Rewrite.ReplaceText(BinOpSL, 2U , "XXX");
}
else
{
std::cout << "the macther -binopeq- returned nullptr!" << std::endl;
}
}
private:
Rewriter &Rewrite;
};
/**********************************************************************************************************************/
/**********************************************************************************************************************/
class MyASTConsumer : public ASTConsumer {
public:
MyASTConsumer(Rewriter &R) : HandlerForFunction(R) {
Matcher.addMatcher(binaryOperator(hasOperatorName("==")).bind("binopeq"), &HandlerForFunction);
}
void HandleTranslationUnit(ASTContext &Context) override {
Matcher.matchAST(Context);
}
private:
FunctionHandler HandlerForFunction;
MatchFinder Matcher;
};
/**********************************************************************************************************************/
class MyFrontendAction : public ASTFrontendAction {
public:
MyFrontendAction() {}
void EndSourceFileAction() override {
TheRewriter.getEditBuffer(TheRewriter.getSourceMgr().getMainFileID()).write(llvm::outs());
}
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI, StringRef file) override {
TheRewriter.setSourceMgr(CI.getSourceManager(), CI.getLangOpts());
return llvm::make_unique<MyASTConsumer>(TheRewriter);
}
private:
Rewriter TheRewriter;
};
/**********************************************************************************************************************/
/*MAIN*/
int main(int argc, const char **argv) {
CommonOptionsParser op(argc, argv, MatcherSampleCategory);
ClangTool Tool(op.getCompilations(), op.getSourcePathList());
return Tool.run(newFrontendActionFactory<MyFrontendAction>().get());
}
/*last line intentionally left blank.*/
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