| 1 | //===--- TrailingReturnCheck.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 "TrailingReturnCheck.h" |
| 10 | #include "clang/AST/ASTContext.h" |
| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
| 12 | #include "clang/ASTMatchers/ASTMatchersInternal.h" |
| 13 | |
| 14 | using namespace clang::ast_matchers; |
| 15 | |
| 16 | namespace clang::tidy::fuchsia { |
| 17 | |
| 18 | void TrailingReturnCheck::registerMatchers(MatchFinder *Finder) { |
| 19 | // Functions that have trailing returns are disallowed, except for those |
| 20 | // using decltype specifiers and lambda with otherwise unutterable |
| 21 | // return types. |
| 22 | Finder->addMatcher( |
| 23 | NodeMatch: functionDecl(hasTrailingReturn(), |
| 24 | unless(anyOf(returns(InnerMatcher: decltypeType()), |
| 25 | hasParent(cxxRecordDecl(isLambda())), |
| 26 | cxxDeductionGuideDecl()))) |
| 27 | .bind(ID: "decl"), |
| 28 | Action: this); |
| 29 | } |
| 30 | |
| 31 | void TrailingReturnCheck::check(const MatchFinder::MatchResult &Result) { |
| 32 | if (const auto *D = Result.Nodes.getNodeAs<FunctionDecl>(ID: "decl")) |
| 33 | diag(D->getBeginLoc(), |
| 34 | "a trailing return type is disallowed for this function declaration"); |
| 35 | } |
| 36 | |
| 37 | } // namespace clang::tidy::fuchsia |
| 38 |