Clang Demo

clang-demo.cpp

#include <clang/AST/Expr.h>
#include <clang/Tooling/Tooling.h>
#include <string>
#include <vector>


class ClangIndexer : public clang::ASTFrontendAction {
protected:
	virtual std::unique_ptr<clang::ASTConsumer>
	CreateASTConsumer(clang::CompilerInstance &ci, llvm::StringRef input_file);
};


class IndexerASTConsumer : public clang::ASTConsumer {
protected:
	void HandleTranslationUnit(clang::ASTContext &astcontext) final {
		astcontext.getTranslationUnitDecl()->dump();
	}
};

std::unique_ptr<clang::ASTConsumer>
ClangIndexer::CreateASTConsumer(clang::CompilerInstance &ci,
                                llvm::StringRef input_file) {
	return std::unique_ptr<clang::ASTConsumer>(new IndexerASTConsumer());
}

auto main() -> int {
	llvm::IntrusiveRefCntPtr<clang::FileManager> file_manager(
			new clang::FileManager(clang::FileSystemOptions()));
	clang::tooling::ToolInvocation invoker(std::vector<std::string>{"clang", "-c", "/home/liangyinan/Code/test/misra/a.c"}, new ClangIndexer(),
	                                       file_manager.get());
//	invoker.setDiagnosticConsumer(new clang::IgnoringDiagConsumer);
	invoker.run();
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
project(clangtest)

# Search LLVM
find_package(LLVM REQUIRED CONFIG
             HINTS "${LLVM_INSTALL_PREFIX}/lib/cmake/llvm")
find_package(Clang REQUIRED CONFIG
             HINTS "${LLVM_INSTALL_PREFIX}/lib/cmake/clang")

include_directories(${LLVM_INCLUDE_DIRS})
add_definitions(${LLVM_DEFINITIONS})

llvm_map_components_to_libnames(LLVM_LIBS Core Support Object)

message(${LLVM_LIBS})

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fno-rtti")
set(CMAKE_CXX_STANDARD 11)
add_executable(clangtest main.cpp)
target_link_libraries(clangtest ${LLVM_LIBS})
target_link_libraries(clangtest ${LLVM_LIBS} clang clangFrontend clangTooling clangAST)