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1 //===--- ASTSignals.h --------------------------------------------*- C++-*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H
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10 #define LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H
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11
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12 #include "ParsedAST.h"
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13 #include "index/SymbolID.h"
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14 #include "llvm/ADT/DenseMap.h"
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15 #include "llvm/ADT/StringMap.h"
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16
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17 namespace clang {
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18 namespace clangd {
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19
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20 /// Signals derived from a valid AST of a file.
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21 /// Provides information that can only be extracted from the AST to actions that
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22 /// can't access an AST. The signals are computed and updated asynchronously by
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23 /// the ASTWorker and thus they are always stale and also can be absent.
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24 /// Example usage: Information about the declarations used in a file affects
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25 /// code-completion ranking in that file.
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26 struct ASTSignals {
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27 /// Number of occurrences of each symbol present in the file.
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28 llvm::DenseMap<SymbolID, unsigned> ReferencedSymbols;
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29 /// Namespaces whose symbols are used in the file, and the number of such
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30 /// distinct symbols.
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31 llvm::StringMap<unsigned> RelatedNamespaces;
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32
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33 static ASTSignals derive(const ParsedAST &AST);
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34 };
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35
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36 } // namespace clangd
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37 } // namespace clang
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38
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39 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H
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