================
@@ -0,0 +1,77 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "UseToUnderlyingCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include "clang/Lex/Lexer.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+UseToUnderlyingCheck::UseToUnderlyingCheck(StringRef Name,
+ ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context),
+ Inserter(Options.getLocalOrGlobal("IncludeStyle",
+ utils::IncludeSorter::IS_LLVM),
+ areDiagsSelfContained()) {}
+//
+void UseToUnderlyingCheck::registerPPCallbacks(const SourceManager &SM,
+ Preprocessor *PP,
+ Preprocessor *ModuleExpanderPP)
{
+ Inserter.registerPreprocessor(PP);
+}
+
+void UseToUnderlyingCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
+ Options.store(Opts, "IncludeStyle", Inserter.getStyle());
+}
+
+bool UseToUnderlyingCheck::isLanguageVersionSupported(
+ const LangOptions &LangOpts) const {
+ return LangOpts.CPlusPlus23;
+}
+
+void UseToUnderlyingCheck::registerMatchers(MatchFinder *Finder) {
+ // FIXME: Add matchers.
+ Finder->addMatcher(
+ cxxStaticCastExpr( // C++ cast
+ hasDestinationType(
+ isInteger()), // casting to any type of integer (int,long,etc)
+ hasSourceExpression( // is an enum class
+ expr(hasType(enumType(hasDeclaration(enumDecl(isScoped())))))
+ .bind("enumExpr"))) // giving the name enumExpr
+ .bind("castExpr"), // giving the name castExpr
+ this);
+}
+
+void UseToUnderlyingCheck::check(const MatchFinder::MatchResult &Result) {
+ // Acquiring the enumExpr and castExpr using getNodeAS
+ const auto *Enum = Result.Nodes.getNodeAs<Expr>("enumExpr");
+ const auto *Cast = Result.Nodes.getNodeAs<CXXStaticCastExpr>("castExpr");
+
+ // getting contents of that node using getsourcetext
+ StringRef EnumExprText = Lexer::getSourceText(
+ CharSourceRange::getTokenRange(Enum->getSourceRange()),
+ *Result.SourceManager, getLangOpts());
+ // Suggestion to the user regarding the cast expr
+ std::string Replacement = ("std::to_underlying(" + EnumExprText + ")").str();
----------------
EugeneZelenko wrote:
```suggestion
const std::string Replacement = ("std::to_underlying(" + EnumExprText +
")").str();
```
https://github.com/llvm/llvm-project/pull/167212
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