1 //===--- Ref.cpp -------------------------------------------------*- 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 #include "Ref.h"
10 #include "llvm/ADT/STLExtras.h"
11
12 namespace clang {
13 namespace clangd {
14
operator <<(llvm::raw_ostream & OS,RefKind K)15 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, RefKind K) {
16 if (K == RefKind::Unknown)
17 return OS << "Unknown";
18 static constexpr std::array<const char *, 4> Messages = {"Decl", "Def", "Ref",
19 "Spelled"};
20 bool VisitedOnce = false;
21 for (unsigned I = 0; I < Messages.size(); ++I) {
22 if (static_cast<uint8_t>(K) & 1u << I) {
23 if (VisitedOnce)
24 OS << ", ";
25 OS << Messages[I];
26 VisitedOnce = true;
27 }
28 }
29 return OS;
30 }
31
operator <<(llvm::raw_ostream & OS,const Ref & R)32 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const Ref &R) {
33 return OS << R.Location << ":" << R.Kind;
34 }
35
insert(const SymbolID & ID,const Ref & S)36 void RefSlab::Builder::insert(const SymbolID &ID, const Ref &S) {
37 Entry E = {ID, S};
38 E.Reference.Location.FileURI = UniqueStrings.save(S.Location.FileURI).data();
39 Entries.insert(std::move(E));
40 }
41
build()42 RefSlab RefSlab::Builder::build() && {
43 std::vector<std::pair<SymbolID, llvm::ArrayRef<Ref>>> Result;
44 // We'll reuse the arena, as it only has unique strings and we need them all.
45 // We need to group refs by symbol and form contiguous arrays on the arena.
46 std::vector<std::pair<SymbolID, const Ref *>> Flat;
47 Flat.reserve(Entries.size());
48 for (const Entry &E : Entries)
49 Flat.emplace_back(E.Symbol, &E.Reference);
50 // Group by SymbolID.
51 llvm::sort(Flat, llvm::less_first());
52 std::vector<Ref> Refs;
53 // Loop over symbols, copying refs for each onto the arena.
54 for (auto I = Flat.begin(), End = Flat.end(); I != End;) {
55 SymbolID Sym = I->first;
56 Refs.clear();
57 do {
58 Refs.push_back(*I->second);
59 ++I;
60 } while (I != End && I->first == Sym);
61 llvm::sort(Refs); // By file, affects xrefs display order.
62 Result.emplace_back(Sym, llvm::ArrayRef<Ref>(Refs).copy(Arena));
63 }
64 return RefSlab(std::move(Result), std::move(Arena), Entries.size());
65 }
66
67 } // namespace clangd
68 } // namespace clang
69