clang-tools-extra/clang-tidy/performance/NoexceptMoveConstructorCheck.h

   1 //===--- NoexceptMoveConstructorCheck.h - clang-tidy-------------*- C++ -*-===//
   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 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_NOEXCEPTMOVECONSTRUCTORCHECK_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_NOEXCEPTMOVECONSTRUCTORCHECK_H
  11
  12 #include "../ClangTidyCheck.h"
  13 #include "NoexceptFunctionBaseCheck.h"
  14
  15 namespace clang::tidy::performance {
  16
  17 /// The check flags user-defined move constructors and assignment operators not
  18 /// marked with `noexcept` or marked with `noexcept(expr)` where `expr`
  19 /// evaluates to `false` (but is not a `false` literal itself).
  20 ///
  21 /// Move constructors of all the types used with STL containers, for example,
  22 /// need to be declared `noexcept`. Otherwise STL will choose copy constructors
  23 /// instead. The same is valid for move assignment operations.
  24 ///
  25 /// For the user-facing documentation see:
  26 /// https://clang.llvm.org/extra/clang-tidy/checks/performance/noexcept-move-constructor.html
  27 class NoexceptMoveConstructorCheck : public NoexceptFunctionBaseCheck {
  28 public:
  29   using NoexceptFunctionBaseCheck::NoexceptFunctionBaseCheck;
  30
  31   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  32
  33 private:
  34   DiagnosticBuilder
  35   reportMissingNoexcept(const FunctionDecl *FuncDecl) final override;
  36   void reportNoexceptEvaluatedToFalse(const FunctionDecl *FuncDecl,
  37                                       const Expr *NoexceptExpr) final override;
  38 };
  39
  40 } // namespace clang::tidy::performance
  41
  42 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_NOEXCEPTMOVECONSTRUCTORCHECK_H