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1//===--- Merge.h -------------------------------------------------*- C++-*-===//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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MERGE_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MERGE_H11 12#include "index/Index.h"13 14namespace clang {15namespace clangd {16 17// Merge symbols L and R, preferring data from L in case of conflict.18// The two symbols must have the same ID.19// Returned symbol may contain data owned by either source.20Symbol mergeSymbol(const Symbol &L, const Symbol &R);21 22// MergedIndex is a composite index based on two provided Indexes:23// - the Dynamic index covers few files, but is relatively up-to-date.24// - the Static index covers a bigger set of files, but is relatively stale.25// The returned index attempts to combine results, and avoid duplicates.26class MergedIndex : public SymbolIndex {27 const SymbolIndex *Dynamic, *Static;28 29public:30 // The constructor does not access the symbols.31 // It's safe to inherit from this class and pass pointers to derived members.32 MergedIndex(const SymbolIndex *Dynamic, const SymbolIndex *Static)33 : Dynamic(Dynamic), Static(Static) {}34 35 bool fuzzyFind(const FuzzyFindRequest &,36 llvm::function_ref<void(const Symbol &)>) const override;37 void lookup(const LookupRequest &,38 llvm::function_ref<void(const Symbol &)>) const override;39 bool refs(const RefsRequest &,40 llvm::function_ref<void(const Ref &)>) const override;41 bool containedRefs(42 const ContainedRefsRequest &,43 llvm::function_ref<void(const ContainedRefsResult &)>) const override;44 void relations(const RelationsRequest &,45 llvm::function_ref<void(const SymbolID &, const Symbol &)>)46 const override;47 void48 reverseRelations(const RelationsRequest &,49 llvm::function_ref<void(const SymbolID &, const Symbol &)>)50 const override;51 llvm::unique_function<IndexContents(llvm::StringRef) const>52 indexedFiles() const override;53 size_t estimateMemoryUsage() const override {54 return Dynamic->estimateMemoryUsage() + Static->estimateMemoryUsage();55 }56};57 58} // namespace clangd59} // namespace clang60 61#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MERGE_H62