================ @@ -0,0 +1,49 @@ +//===--- MustUseCheck.cpp - clang-tidy ------------------------------------===// +// +// 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 "MustUseCheck.h" +#include "../utils/Matchers.h" +#include "../utils/OptionsUtils.h" +#include "clang/ASTMatchers/ASTMatchFinder.h" +#include "clang/ASTMatchers/ASTMatchers.h" + +using namespace clang::ast_matchers; + +namespace clang::tidy::misc { + +namespace { +AST_MATCHER(VarDecl, isLocalVar) { return Node.isLocalVarDecl(); } +AST_MATCHER(VarDecl, isReferenced) { return Node.isReferenced(); } +} // namespace + +MustUseCheck::MustUseCheck(StringRef Name, ClangTidyContext *Context) + : ClangTidyCheck(Name, Context), + Types(utils::options::parseStringList(Options.get("Types", ""))) {} + +void MustUseCheck::registerMatchers(MatchFinder *Finder) { + if (Types.empty()) { + return; + } + Finder->addMatcher( + varDecl(isLocalVar(), unless(isReferenced()), + hasType(hasUnqualifiedDesugaredType(recordType(hasDeclaration( + recordDecl(matchers::matchesAnyListedName(Types))))))) + .bind("var"), + this); +} + +void MustUseCheck::check(const MatchFinder::MatchResult &Result) { + const auto *MatchedDecl = Result.Nodes.getNodeAs<VarDecl>("var"); + diag(MatchedDecl->getLocation(), "variable %0 must be used") << MatchedDecl; ---------------- PiotrZSL wrote:
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