forked from OSchip/llvm-project
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
//===--- MemIndex.h - Dynamic in-memory symbol index. -------------- C++-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MEMINDEX_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MEMINDEX_H
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#include "Index.h"
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#include <mutex>
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namespace clang {
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namespace clangd {
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/// MemIndex is a naive in-memory index suitable for a small set of symbols.
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class MemIndex : public SymbolIndex {
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public:
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/// Maps from a symbol ID to all corresponding symbol occurrences.
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/// The map doesn't own occurrence objects.
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using OccurrenceMap =
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llvm::DenseMap<SymbolID, std::vector<const SymbolOccurrence *>>;
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MemIndex() = default;
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// All symbols and occurrences must outlive this index.
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// TODO: find a better type for Occurrences here.
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template <typename SymbolRange>
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MemIndex(SymbolRange &&Symbols, OccurrenceMap Occurrences)
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: Occurrences(std::move(Occurrences)) {
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for (const Symbol &S : Symbols)
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Index[S.ID] = &S;
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}
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// Symbols are owned by BackingData, Index takes ownership.
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template <typename Range, typename Payload>
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MemIndex(Range &&Symbols, OccurrenceMap Occurrences, Payload &&BackingData)
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: MemIndex(std::forward<Range>(Symbols), std::move(Occurrences)) {
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KeepAlive = std::shared_ptr<void>(
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std::make_shared<Payload>(std::move(BackingData)), nullptr);
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}
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/// Builds an index from a slab. The index takes ownership of the data.
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static std::unique_ptr<SymbolIndex> build(SymbolSlab Slab,
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SymbolOccurrenceSlab Occurrences);
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bool
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fuzzyFind(const FuzzyFindRequest &Req,
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llvm::function_ref<void(const Symbol &)> Callback) const override;
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void lookup(const LookupRequest &Req,
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llvm::function_ref<void(const Symbol &)> Callback) const override;
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void findOccurrences(const OccurrencesRequest &Req,
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llvm::function_ref<void(const SymbolOccurrence &)>
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Callback) const override;
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size_t estimateMemoryUsage() const override;
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private:
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// Index is a set of symbols that are deduplicated by symbol IDs.
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llvm::DenseMap<SymbolID, const Symbol *> Index;
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// A map from symbol ID to symbol occurrences, support query by IDs.
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OccurrenceMap Occurrences;
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std::shared_ptr<void> KeepAlive; // poor man's move-only std::any
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};
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} // namespace clangd
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} // namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_MEMINDEX_H
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