libcxx/test/tools/clang_tidy_checks/robust_against_adl.cpp

   1 //===----------------------------------------------------------------------===//
   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 "clang-tidy/ClangTidyCheck.h"
  10 #include "clang-tidy/ClangTidyModuleRegistry.h"
  11
  12 #include "robust_against_adl.hpp"
  13
  14 #include <algorithm>
  15
  16 namespace {
  17 AST_MATCHER(clang::UnresolvedLookupExpr, requiresADL) { return Node.requiresADL(); }
  18
  19 AST_MATCHER(clang::CallExpr, isOperator) { return llvm::isa<clang::CXXOperatorCallExpr>(Node); }
  20
  21 AST_MATCHER(clang::UnresolvedLookupExpr, isCustomizationPoint) {
  22   return std::ranges::any_of(
  23       std::array{"swap", "make_error_code", "make_error_condition", "begin", "end", "size", "rend", "rbegin"},
  24       [&](const char* func) { return Node.getName().getAsString() == func; });
  25 }
  26
  27 AST_MATCHER(clang::CXXMethodDecl, isStatic) { return Node.isStatic(); }
  28
  29 } // namespace
  30
  31 namespace libcpp {
  32 robust_against_adl_check::robust_against_adl_check(llvm::StringRef name, clang::tidy::ClangTidyContext* context)
  33     : clang::tidy::ClangTidyCheck(name, context) {}
  34
  35 void robust_against_adl_check::registerMatchers(clang::ast_matchers::MatchFinder* finder) {
  36   using namespace clang::ast_matchers;
  37   finder->addMatcher(
  38       callExpr(unless(isOperator()),
  39                unless(argumentCountIs(0)),
  40                has(unresolvedLookupExpr(requiresADL(), unless(isCustomizationPoint()))),
  41                unless(callee(cxxMethodDecl(isStatic()))))
  42           .bind("ADLcall"),
  43       this);
  44 }
  45
  46 void robust_against_adl_check::check(const clang::ast_matchers::MatchFinder::MatchResult& result) {
  47   if (const auto* call = result.Nodes.getNodeAs<clang::CallExpr>("ADLcall"); call != nullptr) {
  48     diag(call->getBeginLoc(), "ADL lookup");
  49   }
  50 }
  51 } // namespace libcpp