1 //===--- NoInternalDependenciesCheck.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 "NoInternalDependenciesCheck.h" 10 #include "AbseilMatcher.h" 11 #include "clang/AST/ASTContext.h" 12 #include "clang/ASTMatchers/ASTMatchFinder.h" 13 14 using namespace clang::ast_matchers; 15 16 namespace clang::tidy::abseil { 17 registerMatchers(MatchFinder * Finder)18void NoInternalDependenciesCheck::registerMatchers(MatchFinder *Finder) { 19 // TODO: refactor matcher to be configurable or just match on any internal 20 // access from outside the enclosing namespace. 21 22 Finder->addMatcher( 23 nestedNameSpecifierLoc(loc(specifiesNamespace(namespaceDecl( 24 matchesName("internal"), 25 hasParent(namespaceDecl(hasName("absl")))))), 26 unless(isInAbseilFile())) 27 .bind("InternalDep"), 28 this); 29 } 30 check(const MatchFinder::MatchResult & Result)31void NoInternalDependenciesCheck::check(const MatchFinder::MatchResult &Result) { 32 const auto *InternalDependency = 33 Result.Nodes.getNodeAs<NestedNameSpecifierLoc>("InternalDep"); 34 35 SourceLocation LocAtFault = 36 Result.SourceManager->getSpellingLoc(InternalDependency->getBeginLoc()); 37 38 if (!LocAtFault.isValid()) 39 return; 40 41 diag(LocAtFault, 42 "do not reference any 'internal' namespaces; those implementation " 43 "details are reserved to Abseil"); 44 } 45 46 } // namespace clang::tidy::abseil 47