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//===- AbseilMatcher.h - clang-tidy ---------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include <algorithm>
namespace clang {
namespace ast_matchers {
/// Matches AST nodes that were found within Abseil files.
///
/// Example matches Y but not X
/// (matcher = cxxRecordDecl(isInAbseilFile())
/// \code
/// #include "absl/strings/internal-file.h"
/// class X {};
/// \endcode
/// absl/strings/internal-file.h:
/// \code
/// class Y {};
/// \endcode
///
/// Usable as: Matcher<Decl>, Matcher<Stmt>, Matcher<TypeLoc>,
/// Matcher<NestedNameSpecifierLoc>
AST_POLYMORPHIC_MATCHER(
isInAbseilFile, AST_POLYMORPHIC_SUPPORTED_TYPES(Decl, Stmt, TypeLoc,
NestedNameSpecifierLoc)) {
auto &SourceManager = Finder->getASTContext().getSourceManager();
SourceLocation Loc = SourceManager.getSpellingLoc(Node.getBeginLoc());
if (Loc.isInvalid())
return false;
const FileEntry *FileEntry =
SourceManager.getFileEntryForID(SourceManager.getFileID(Loc));
if (!FileEntry)
return false;
// Determine whether filepath contains "absl/[absl-library]" substring, where
// [absl-library] is AbseilLibraries list entry.
StringRef Path = FileEntry->getName();
static constexpr llvm::StringLiteral AbslPrefix("absl/");
size_t PrefixPosition = Path.find(AbslPrefix);
if (PrefixPosition == StringRef::npos)
return false;
Path = Path.drop_front(PrefixPosition + AbslPrefix.size());
static const char *AbseilLibraries[] = {
"algorithm", "base", "container", "debugging", "flags",
"hash", "iterator", "memory", "meta", "numeric",
"random", "strings", "synchronization", "time", "types",
"utility"};
return std::any_of(
std::begin(AbseilLibraries), std::end(AbseilLibraries),
[&](const char *Library) { return Path.startswith(Library); });
}
} // namespace ast_matchers
} // namespace clang
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