44 lines · c
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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H11 12#include "ParsedAST.h"13#include "index/Symbol.h"14#include "index/SymbolID.h"15#include "llvm/ADT/DenseMap.h"16#include "llvm/ADT/StringMap.h"17 18namespace clang {19namespace clangd {20 21/// Signals derived from a valid AST of a file.22/// Provides information that can only be extracted from the AST to actions that23/// can't access an AST. The signals are computed and updated asynchronously by24/// the ASTWorker and thus they are always stale and also can be absent.25/// Example usage: Information about the declarations used in a file affects26/// code-completion ranking in that file.27struct ASTSignals {28 /// Number of occurrences of each symbol present in the file.29 llvm::DenseMap<SymbolID, unsigned> ReferencedSymbols;30 /// Namespaces whose symbols are used in the file, and the number of such31 /// distinct symbols.32 llvm::StringMap<unsigned> RelatedNamespaces;33 /// Preferred preprocessor directive to use for inclusions by the file.34 Symbol::IncludeDirective InsertionDirective =35 Symbol::IncludeDirective::Include;36 37 static ASTSignals derive(const ParsedAST &AST);38};39 40} // namespace clangd41} // namespace clang42 43#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_ASTSIGNALS_H44