llvm/clang-tools-extra/clangd/index/dex/Dex.h

//===--- Dex.h - Dex Symbol Index Implementation ----------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This defines Dex - a symbol index implementation based on query iterators
/// over symbol tokens, such as fuzzy matching trigrams, scopes, types, etc.
/// While consuming more memory and having longer build stage due to
/// preprocessing, Dex will have substantially lower latency. It will also allow
/// efficient symbol searching which is crucial for operations like code
/// completion, and can be very important for a number of different code
/// transformations which will be eventually supported by Clangd.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_DEX_DEX_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_DEX_DEX_H

#include "index/dex/Iterator.h"
#include "index/Index.h"
#include "index/Relation.h"
#include "index/dex/PostingList.h"
#include "index/dex/Token.h"
#include "llvm/ADT/StringSet.h"

namespace clang {
namespace clangd {
namespace dex {

/// In-memory Dex trigram-based index implementation.
class Dex : public SymbolIndex { … };

/// Returns Search Token for a number of parent directories of given Path.
/// Should be used within the index build process.
///
/// This function is exposed for testing only.
llvm::SmallVector<llvm::StringRef, 5> generateProximityURIs(llvm::StringRef);

} // namespace dex
} // namespace clangd
} // namespace clang

#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_DEX_DEX_H