1 //===--- TerminatingContinueCheck.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 "TerminatingContinueCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 #include "clang/Lex/Lexer.h"
13 #include "clang/Tooling/FixIt.h"
14 
15 using namespace clang::ast_matchers;
16 
17 namespace clang {
18 namespace tidy {
19 namespace bugprone {
20 
21 void TerminatingContinueCheck::registerMatchers(MatchFinder *Finder) {
22   const auto doWithFalse =
23       doStmt(hasCondition(ignoringImpCasts(
24                  anyOf(cxxBoolLiteral(equals(false)), integerLiteral(equals(0)),
25                        cxxNullPtrLiteralExpr(), gnuNullExpr()))),
26              equalsBoundNode("closestLoop"));
27 
28   Finder->addMatcher(
29       continueStmt(hasAncestor(stmt(anyOf(forStmt(), whileStmt(),
30                                           cxxForRangeStmt(), doStmt()))
31                                    .bind("closestLoop")),
32                    hasAncestor(doWithFalse))
33           .bind("continue"),
34       this);
35 }
36 
37 void TerminatingContinueCheck::check(const MatchFinder::MatchResult &Result) {
38   const auto *ContStmt = Result.Nodes.getNodeAs<ContinueStmt>("continue");
39 
40   auto Diag =
41       diag(ContStmt->getBeginLoc(),
42            "'continue' in loop with false condition is equivalent to 'break'")
43       << tooling::fixit::createReplacement(*ContStmt, "break");
44 }
45 
46 } // namespace bugprone
47 } // namespace tidy
48 } // namespace clang
49