| //===-- SymbolIndexManager.cpp - Managing multiple SymbolIndices-*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SymbolIndexManager.h" |
| #include "find-all-symbols/SymbolInfo.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/Support/Debug.h" |
| |
| #define DEBUG_TYPE "include-fixer" |
| |
| namespace clang { |
| namespace include_fixer { |
| |
| using clang::find_all_symbols::SymbolInfo; |
| |
| /// Sorts SymbolInfos based on the popularity info in SymbolInfo. |
| static void rankByPopularity(std::vector<SymbolInfo> &Symbols) { |
| // First collect occurrences per header file. |
| llvm::DenseMap<llvm::StringRef, unsigned> HeaderPopularity; |
| for (const SymbolInfo &Symbol : Symbols) { |
| unsigned &Popularity = HeaderPopularity[Symbol.getFilePath()]; |
| Popularity = std::max(Popularity, Symbol.getNumOccurrences()); |
| } |
| |
| // Sort by the gathered popularities. Use file name as a tie breaker so we can |
| // deduplicate. |
| std::sort(Symbols.begin(), Symbols.end(), |
| [&](const SymbolInfo &A, const SymbolInfo &B) { |
| auto APop = HeaderPopularity[A.getFilePath()]; |
| auto BPop = HeaderPopularity[B.getFilePath()]; |
| if (APop != BPop) |
| return APop > BPop; |
| return A.getFilePath() < B.getFilePath(); |
| }); |
| } |
| |
| std::vector<find_all_symbols::SymbolInfo> |
| SymbolIndexManager::search(llvm::StringRef Identifier) const { |
| // The identifier may be fully qualified, so split it and get all the context |
| // names. |
| llvm::SmallVector<llvm::StringRef, 8> Names; |
| Identifier.split(Names, "::"); |
| |
| bool IsFullyQualified = false; |
| if (Identifier.startswith("::")) { |
| Names.erase(Names.begin()); // Drop first (empty) element. |
| IsFullyQualified = true; |
| } |
| |
| // As long as we don't find a result keep stripping name parts from the end. |
| // This is to support nested classes which aren't recorded in the database. |
| // Eventually we will either hit a class (namespaces aren't in the database |
| // either) and can report that result. |
| bool TookPrefix = false; |
| std::vector<clang::find_all_symbols::SymbolInfo> MatchedSymbols; |
| while (MatchedSymbols.empty() && !Names.empty()) { |
| std::vector<clang::find_all_symbols::SymbolInfo> Symbols; |
| for (const auto &DB : SymbolIndices) { |
| auto Res = DB->search(Names.back().str()); |
| Symbols.insert(Symbols.end(), Res.begin(), Res.end()); |
| } |
| |
| DEBUG(llvm::dbgs() << "Searching " << Names.back() << "... got " |
| << Symbols.size() << " results...\n"); |
| |
| for (const auto &Symbol : Symbols) { |
| // Match the identifier name without qualifier. |
| if (Symbol.getName() == Names.back()) { |
| bool IsMatched = true; |
| auto SymbolContext = Symbol.getContexts().begin(); |
| auto IdentiferContext = Names.rbegin() + 1; // Skip identifier name. |
| // Match the remaining context names. |
| while (IdentiferContext != Names.rend() && |
| SymbolContext != Symbol.getContexts().end()) { |
| if (SymbolContext->second == *IdentiferContext) { |
| ++IdentiferContext; |
| ++SymbolContext; |
| } else if (SymbolContext->first == |
| find_all_symbols::SymbolInfo::ContextType::EnumDecl) { |
| // Skip non-scoped enum context. |
| ++SymbolContext; |
| } else { |
| IsMatched = false; |
| break; |
| } |
| } |
| |
| // If the name was qualified we only want to add results if we evaluated |
| // all contexts. |
| if (IsFullyQualified) |
| IsMatched &= (SymbolContext == Symbol.getContexts().end()); |
| |
| // FIXME: Support full match. At this point, we only find symbols in |
| // database which end with the same contexts with the identifier. |
| if (IsMatched && IdentiferContext == Names.rend()) { |
| // If we're in a situation where we took a prefix but the thing we |
| // found couldn't possibly have a nested member ignore it. |
| if (TookPrefix && |
| (Symbol.getSymbolKind() == SymbolInfo::SymbolKind::Function || |
| Symbol.getSymbolKind() == SymbolInfo::SymbolKind::Variable || |
| Symbol.getSymbolKind() == |
| SymbolInfo::SymbolKind::EnumConstantDecl || |
| Symbol.getSymbolKind() == SymbolInfo::SymbolKind::Macro)) |
| continue; |
| |
| MatchedSymbols.push_back(Symbol); |
| } |
| } |
| } |
| Names.pop_back(); |
| TookPrefix = true; |
| } |
| |
| rankByPopularity(MatchedSymbols); |
| return MatchedSymbols; |
| } |
| |
| } // namespace include_fixer |
| } // namespace clang |