1 //===--- ASTSignals.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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H 10 #define LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H 11 12 #include "ParsedAST.h" 13 #include "index/SymbolID.h" 14 #include "llvm/ADT/DenseMap.h" 15 #include "llvm/ADT/StringMap.h" 16 17 namespace clang { 18 namespace clangd { 19 20 /// Signals derived from a valid AST of a file. 21 /// Provides information that can only be extracted from the AST to actions that 22 /// can't access an AST. The signals are computed and updated asynchronously by 23 /// the ASTWorker and thus they are always stale and also can be absent. 24 /// Example usage: Information about the declarations used in a file affects 25 /// code-completion ranking in that file. 26 struct ASTSignals { 27 /// Number of occurrences of each symbol present in the file. 28 llvm::DenseMap<SymbolID, unsigned> ReferencedSymbols; 29 /// Namespaces whose symbols are used in the file, and the number of such 30 /// distinct symbols. 31 llvm::StringMap<unsigned> RelatedNamespaces; 32 33 static ASTSignals derive(const ParsedAST &AST); 34 }; 35 36 } // namespace clangd 37 } // namespace clang 38 39 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H 40