forked from OSchip/llvm-project
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
//===--- DraftStore.h - File contents container -----------------*- 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_DRAFTSTORE_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_DRAFTSTORE_H
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#include "Path.h"
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#include "clang/Basic/LLVM.h"
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#include "llvm/ADT/StringMap.h"
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#include <cstdint>
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#include <mutex>
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#include <string>
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#include <vector>
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namespace clang {
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namespace clangd {
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/// Using unsigned int type here to avoid undefined behaviour on overflow.
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typedef uint64_t DocVersion;
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/// Document draft with a version of this draft.
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struct VersionedDraft {
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DocVersion Version;
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/// If the value of the field is None, draft is now deleted
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llvm::Optional<std::string> Draft;
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};
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/// A thread-safe container for files opened in a workspace, addressed by
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/// filenames. The contents are owned by the DraftStore. Versions are mantained
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/// for the all added documents, including removed ones. The document version is
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/// incremented on each update and removal of the document.
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class DraftStore {
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public:
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/// \return version and contents of the stored document.
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/// For untracked files, a (0, None) pair is returned.
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VersionedDraft getDraft(PathRef File) const;
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/// \return version of the tracked document.
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/// For untracked files, 0 is returned.
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DocVersion getVersion(PathRef File) const;
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/// Replace contents of the draft for \p File with \p Contents.
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/// \return The new version of the draft for \p File.
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DocVersion updateDraft(PathRef File, StringRef Contents);
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/// Remove the contents of the draft
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/// \return The new version of the draft for \p File.
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DocVersion removeDraft(PathRef File);
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private:
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mutable std::mutex Mutex;
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llvm::StringMap<VersionedDraft> Drafts;
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};
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} // namespace clangd
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} // namespace clang
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#endif
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