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 { 17 namespace tidy { 18 namespace abseil { 19 registerMatchers(MatchFinder * Finder)20void NoInternalDependenciesCheck::registerMatchers(MatchFinder *Finder) { 21 // TODO: refactor matcher to be configurable or just match on any internal 22 // access from outside the enclosing namespace. 23 24 Finder->addMatcher( 25 nestedNameSpecifierLoc(loc(specifiesNamespace(namespaceDecl( 26 matchesName("internal"), 27 hasParent(namespaceDecl(hasName("absl")))))), 28 unless(isInAbseilFile())) 29 .bind("InternalDep"), 30 this); 31 } 32 check(const MatchFinder::MatchResult & Result)33void NoInternalDependenciesCheck::check(const MatchFinder::MatchResult &Result) { 34 const auto *InternalDependency = 35 Result.Nodes.getNodeAs<NestedNameSpecifierLoc>("InternalDep"); 36 37 SourceLocation LocAtFault = 38 Result.SourceManager->getSpellingLoc(InternalDependency->getBeginLoc()); 39 40 if (!LocAtFault.isValid()) 41 return; 42 43 diag(LocAtFault, 44 "do not reference any 'internal' namespaces; those implementation " 45 "details are reserved to Abseil"); 46 } 47 48 } // namespace abseil 49 } // namespace tidy 50 } // namespace clang 51