1 //===--- UnaryStaticAssertCheck.cpp - clang-tidy---------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "UnaryStaticAssertCheck.h" 10 #include "clang/AST/ASTContext.h" 11 #include "clang/ASTMatchers/ASTMatchFinder.h" 12 13 using namespace clang::ast_matchers; 14 15 namespace clang { 16 namespace tidy { 17 namespace modernize { 18 registerMatchers(MatchFinder * Finder)19void UnaryStaticAssertCheck::registerMatchers(MatchFinder *Finder) { 20 if (!getLangOpts().CPlusPlus17) 21 return; 22 23 Finder->addMatcher(staticAssertDecl().bind("static_assert"), this); 24 } 25 check(const MatchFinder::MatchResult & Result)26void UnaryStaticAssertCheck::check(const MatchFinder::MatchResult &Result) { 27 const auto *MatchedDecl = 28 Result.Nodes.getNodeAs<StaticAssertDecl>("static_assert"); 29 const StringLiteral *AssertMessage = MatchedDecl->getMessage(); 30 31 SourceLocation Loc = MatchedDecl->getLocation(); 32 33 if (!AssertMessage || AssertMessage->getLength() || 34 AssertMessage->getBeginLoc().isMacroID() || Loc.isMacroID()) 35 return; 36 37 diag(Loc, 38 "use unary 'static_assert' when the string literal is an empty string") 39 << FixItHint::CreateRemoval(AssertMessage->getSourceRange()); 40 } 41 42 } // namespace modernize 43 } // namespace tidy 44 } // namespace clang 45