| 1 | //===--- NoexceptFunctionCheck.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 "NoexceptFunctionBaseCheck.h" |
| 10 | #include "../utils/LexerUtils.h" |
| 11 | #include "clang/AST/ASTContext.h" |
| 12 | #include "clang/AST/Decl.h" |
| 13 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
| 14 | |
| 15 | using namespace clang::ast_matchers; |
| 16 | |
| 17 | namespace clang::tidy::performance { |
| 18 | |
| 19 | void NoexceptFunctionBaseCheck::check(const MatchFinder::MatchResult &Result) { |
| 20 | const auto *FuncDecl = Result.Nodes.getNodeAs<FunctionDecl>(ID: BindFuncDeclName); |
| 21 | assert(FuncDecl); |
| 22 | |
| 23 | if (SpecAnalyzer.analyze(FuncDecl) != |
| 24 | utils::ExceptionSpecAnalyzer::State::Throwing) |
| 25 | return; |
| 26 | |
| 27 | // Don't complain about nothrow(false), but complain on nothrow(expr) |
| 28 | // where expr evaluates to false. |
| 29 | const auto *ProtoType = FuncDecl->getType()->castAs<FunctionProtoType>(); |
| 30 | const Expr *NoexceptExpr = ProtoType->getNoexceptExpr(); |
| 31 | if (NoexceptExpr) { |
| 32 | NoexceptExpr = NoexceptExpr->IgnoreImplicit(); |
| 33 | if (!isa<CXXBoolLiteralExpr>(Val: NoexceptExpr)) |
| 34 | reportNoexceptEvaluatedToFalse(FuncDecl, NoexceptExpr); |
| 35 | return; |
| 36 | } |
| 37 | |
| 38 | auto Diag = reportMissingNoexcept(FuncDecl); |
| 39 | |
| 40 | // Add FixIt hints. |
| 41 | const SourceManager &SM = *Result.SourceManager; |
| 42 | |
| 43 | const SourceLocation NoexceptLoc = |
| 44 | utils::lexer::getLocationForNoexceptSpecifier(FuncDecl, SM); |
| 45 | if (NoexceptLoc.isValid()) |
| 46 | Diag << FixItHint::CreateInsertion(InsertionLoc: NoexceptLoc, Code: " noexcept "); |
| 47 | } |
| 48 | |
| 49 | } // namespace clang::tidy::performance |
| 50 |