#include "clang/AST/ASTContext.h" #include "clang/AST/OperationKinds.h" #include "clang/AST/Stmt.h" #include "clang/Basic/SourceLocation.h" #include "clang/Basic/SourceManager.h" #include "llvm/ADT/StringRef.h" #include "llvm/Support/raw_ostream.h" using namespace clang; int main() { // Create a SourceManager and ASTContext SourceManager sm; LangOptions langOpts; ASTContext astContext(langOpts, sm); // Create a SourceRange object SourceLocation startLoc = sm.getLocForStartOfFile(sm.getMainFileID()); SourceLocation endLoc = startLoc.getLocWithOffset(10); SourceRange range(startLoc, endLoc); bool isRangeValid = range.isValid(); if (isRangeValid) { // Do something if the range is valid } else { // Do something if the range is invalid } return 0; }In this example, we create a SourceRange object that spans the first 10 characters of the main file. We then check if this range is valid using the isValid function. The SourceRange isValid function is a part of the Clang C++ library, which is a collection of libraries for working with the Clang compiler.