clang-tools  17.0.0git
Quality.cpp
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1 //===--- Quality.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 "Quality.h"
10 #include "AST.h"
11 #include "ASTSignals.h"
12 #include "FileDistance.h"
13 #include "SourceCode.h"
14 #include "index/Symbol.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Decl.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/DeclVisitor.h"
20 #include "clang/Basic/SourceManager.h"
21 #include "clang/Sema/CodeCompleteConsumer.h"
22 #include "llvm/ADT/StringRef.h"
23 #include "llvm/Support/Casting.h"
24 #include "llvm/Support/FormatVariadic.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include <algorithm>
28 #include <cmath>
29 #include <optional>
30 
31 namespace clang {
32 namespace clangd {
33 
34 static bool hasDeclInMainFile(const Decl &D) {
35  auto &SourceMgr = D.getASTContext().getSourceManager();
36  for (auto *Redecl : D.redecls()) {
37  if (isInsideMainFile(Redecl->getLocation(), SourceMgr))
38  return true;
39  }
40  return false;
41 }
42 
43 static bool hasUsingDeclInMainFile(const CodeCompletionResult &R) {
44  const auto &Context = R.Declaration->getASTContext();
45  const auto &SourceMgr = Context.getSourceManager();
46  if (R.ShadowDecl) {
47  if (isInsideMainFile(R.ShadowDecl->getLocation(), SourceMgr))
48  return true;
49  }
50  return false;
51 }
52 
53 static SymbolQualitySignals::SymbolCategory categorize(const NamedDecl &ND) {
54  if (const auto *FD = dyn_cast<FunctionDecl>(&ND)) {
55  if (FD->isOverloadedOperator())
57  }
58  class Switch
59  : public ConstDeclVisitor<Switch, SymbolQualitySignals::SymbolCategory> {
60  public:
61 #define MAP(DeclType, Category) \
62  SymbolQualitySignals::SymbolCategory Visit##DeclType(const DeclType *) { \
63  return SymbolQualitySignals::Category; \
64  }
65  MAP(NamespaceDecl, Namespace);
66  MAP(NamespaceAliasDecl, Namespace);
67  MAP(TypeDecl, Type);
68  MAP(TypeAliasTemplateDecl, Type);
69  MAP(ClassTemplateDecl, Type);
70  MAP(CXXConstructorDecl, Constructor);
71  MAP(CXXDestructorDecl, Destructor);
72  MAP(ValueDecl, Variable);
73  MAP(VarTemplateDecl, Variable);
74  MAP(FunctionDecl, Function);
75  MAP(FunctionTemplateDecl, Function);
76  MAP(Decl, Unknown);
77 #undef MAP
78  };
79  return Switch().Visit(&ND);
80 }
81 
83 categorize(const CodeCompletionResult &R) {
84  if (R.Declaration)
85  return categorize(*R.Declaration);
86  if (R.Kind == CodeCompletionResult::RK_Macro)
88  // Everything else is a keyword or a pattern. Patterns are mostly keywords
89  // too, except a few which we recognize by cursor kind.
90  switch (R.CursorKind) {
91  case CXCursor_CXXMethod:
93  case CXCursor_ModuleImportDecl:
95  case CXCursor_MacroDefinition:
97  case CXCursor_TypeRef:
99  case CXCursor_MemberRef:
101  case CXCursor_Constructor:
103  default:
105  }
106 }
107 
110  switch (D.Kind) {
111  case index::SymbolKind::Namespace:
112  case index::SymbolKind::NamespaceAlias:
114  case index::SymbolKind::Macro:
116  case index::SymbolKind::Enum:
117  case index::SymbolKind::Struct:
118  case index::SymbolKind::Class:
119  case index::SymbolKind::Protocol:
120  case index::SymbolKind::Extension:
121  case index::SymbolKind::Union:
122  case index::SymbolKind::TypeAlias:
123  case index::SymbolKind::TemplateTypeParm:
124  case index::SymbolKind::TemplateTemplateParm:
125  case index::SymbolKind::Concept:
127  case index::SymbolKind::Function:
128  case index::SymbolKind::ClassMethod:
129  case index::SymbolKind::InstanceMethod:
130  case index::SymbolKind::StaticMethod:
131  case index::SymbolKind::InstanceProperty:
132  case index::SymbolKind::ClassProperty:
133  case index::SymbolKind::StaticProperty:
134  case index::SymbolKind::ConversionFunction:
136  case index::SymbolKind::Destructor:
138  case index::SymbolKind::Constructor:
140  case index::SymbolKind::Variable:
142  case index::SymbolKind::EnumConstant:
143  case index::SymbolKind::Parameter:
144  case index::SymbolKind::NonTypeTemplateParm:
146  case index::SymbolKind::Using:
147  case index::SymbolKind::Module:
150  }
151  llvm_unreachable("Unknown index::SymbolKind");
152 }
153 
154 static bool isInstanceMember(const NamedDecl *ND) {
155  if (!ND)
156  return false;
157  if (const auto *TP = dyn_cast<FunctionTemplateDecl>(ND))
158  ND = TP->TemplateDecl::getTemplatedDecl();
159  if (const auto *CM = dyn_cast<CXXMethodDecl>(ND))
160  return !CM->isStatic();
161  return isa<FieldDecl>(ND); // Note that static fields are VarDecl.
162 }
163 
164 static bool isInstanceMember(const index::SymbolInfo &D) {
165  switch (D.Kind) {
166  case index::SymbolKind::InstanceMethod:
167  case index::SymbolKind::InstanceProperty:
169  return true;
170  default:
171  return false;
172  }
173 }
174 
175 void SymbolQualitySignals::merge(const CodeCompletionResult &SemaCCResult) {
176  Deprecated |= (SemaCCResult.Availability == CXAvailability_Deprecated);
177  Category = categorize(SemaCCResult);
178 
179  if (SemaCCResult.Declaration) {
180  ImplementationDetail |= isImplementationDetail(SemaCCResult.Declaration);
181  if (auto *ID = SemaCCResult.Declaration->getIdentifier())
182  ReservedName = ReservedName || isReservedName(ID->getName());
183  } else if (SemaCCResult.Kind == CodeCompletionResult::RK_Macro)
184  ReservedName =
185  ReservedName || isReservedName(SemaCCResult.Macro->getName());
186 }
187 
191  References = std::max(IndexResult.References, References);
192  Category = categorize(IndexResult.SymInfo);
194 }
195 
197  float Score = 1;
198 
199  // This avoids a sharp gradient for tail symbols, and also neatly avoids the
200  // question of whether 0 references means a bad symbol or missing data.
201  if (References >= 10) {
202  // Use a sigmoid style boosting function, which flats out nicely for large
203  // numbers (e.g. 2.58 for 1M references).
204  // The following boosting function is equivalent to:
205  // m = 0.06
206  // f = 12.0
207  // boost = f * sigmoid(m * std::log(References)) - 0.5 * f + 0.59
208  // Sample data points: (10, 1.00), (100, 1.41), (1000, 1.82),
209  // (10K, 2.21), (100K, 2.58), (1M, 2.94)
210  float S = std::pow(References, -0.06);
211  Score *= 6.0 * (1 - S) / (1 + S) + 0.59;
212  }
213 
214  if (Deprecated)
215  Score *= 0.1f;
216  if (ReservedName)
217  Score *= 0.1f;
219  Score *= 0.2f;
220 
221  switch (Category) {
222  case Keyword: // Often relevant, but misses most signals.
223  Score *= 4; // FIXME: important keywords should have specific boosts.
224  break;
225  case Type:
226  case Function:
227  case Variable:
228  Score *= 1.1f;
229  break;
230  case Namespace:
231  Score *= 0.8f;
232  break;
233  case Macro:
234  case Destructor:
235  case Operator:
236  Score *= 0.5f;
237  break;
238  case Constructor: // No boost constructors so they are after class types.
239  case Unknown:
240  break;
241  }
242 
243  return Score;
244 }
245 
246 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
247  const SymbolQualitySignals &S) {
248  OS << llvm::formatv("=== Symbol quality: {0}\n", S.evaluateHeuristics());
249  OS << llvm::formatv("\tReferences: {0}\n", S.References);
250  OS << llvm::formatv("\tDeprecated: {0}\n", S.Deprecated);
251  OS << llvm::formatv("\tReserved name: {0}\n", S.ReservedName);
252  OS << llvm::formatv("\tImplementation detail: {0}\n", S.ImplementationDetail);
253  OS << llvm::formatv("\tCategory: {0}\n", static_cast<int>(S.Category));
254  return OS;
255 }
256 
258 computeScope(const NamedDecl *D) {
259  // Injected "Foo" within the class "Foo" has file scope, not class scope.
260  const DeclContext *DC = D->getDeclContext();
261  if (auto *R = dyn_cast_or_null<RecordDecl>(D))
262  if (R->isInjectedClassName())
263  DC = DC->getParent();
264  // Class constructor should have the same scope as the class.
265  if (isa<CXXConstructorDecl>(D))
266  DC = DC->getParent();
267  bool InClass = false;
268  for (; !DC->isFileContext(); DC = DC->getParent()) {
269  if (DC->isFunctionOrMethod())
271  InClass = InClass || DC->isRecord();
272  }
273  if (InClass)
275  // ExternalLinkage threshold could be tweaked, e.g. module-visible as global.
276  // Avoid caching linkage if it may change after enclosing code completion.
277  if (hasUnstableLinkage(D) || D->getLinkageInternal() < ExternalLinkage)
280 }
281 
283  SymbolURI = IndexResult.CanonicalDeclaration.FileURI;
284  SymbolScope = IndexResult.Scope;
286  if (!(IndexResult.Flags & Symbol::VisibleOutsideFile)) {
287  Scope = AccessibleScope::FileScope;
288  }
289  if (MainFileSignals) {
290  MainFileRefs =
291  std::max(MainFileRefs,
294  std::max(ScopeRefsInFile,
296  }
297 }
298 
300  const CodeCompletionResult &SemaResult) {
301  if (!MainFileSignals)
302  return;
303  if ((SemaResult.Kind != CodeCompletionResult::RK_Declaration) &&
304  (SemaResult.Kind != CodeCompletionResult::RK_Pattern))
305  return;
306  if (const NamedDecl *ND = SemaResult.getDeclaration()) {
307  if (hasUnstableLinkage(ND))
308  return;
309  auto ID = getSymbolID(ND);
310  if (!ID)
311  return;
312  MainFileRefs =
313  std::max(MainFileRefs, MainFileSignals->ReferencedSymbols.lookup(ID));
314  if (const auto *NSD = dyn_cast<NamespaceDecl>(ND->getDeclContext())) {
315  if (NSD->isAnonymousNamespace())
316  return;
317  std::string Scope = printNamespaceScope(*NSD);
318  if (!Scope.empty())
319  ScopeRefsInFile = std::max(
321  }
322  }
323 }
324 
325 void SymbolRelevanceSignals::merge(const CodeCompletionResult &SemaCCResult) {
326  if (SemaCCResult.Availability == CXAvailability_NotAvailable ||
327  SemaCCResult.Availability == CXAvailability_NotAccessible)
328  Forbidden = true;
329 
330  if (SemaCCResult.Declaration) {
331  SemaSaysInScope = true;
332  // We boost things that have decls in the main file. We give a fixed score
333  // for all other declarations in sema as they are already included in the
334  // translation unit.
335  float DeclProximity = (hasDeclInMainFile(*SemaCCResult.Declaration) ||
336  hasUsingDeclInMainFile(SemaCCResult))
337  ? 1.0
338  : 0.6;
339  SemaFileProximityScore = std::max(DeclProximity, SemaFileProximityScore);
340  IsInstanceMember |= isInstanceMember(SemaCCResult.Declaration);
341  InBaseClass |= SemaCCResult.InBaseClass;
342  }
343 
344  computeASTSignals(SemaCCResult);
345  // Declarations are scoped, others (like macros) are assumed global.
346  if (SemaCCResult.Declaration)
347  Scope = std::min(Scope, computeScope(SemaCCResult.Declaration));
348 
349  NeedsFixIts = !SemaCCResult.FixIts.empty();
350 }
351 
352 static float fileProximityScore(unsigned FileDistance) {
353  // Range: [0, 1]
354  // FileDistance = [0, 1, 2, 3, 4, .., FileDistance::Unreachable]
355  // Score = [1, 0.82, 0.67, 0.55, 0.45, .., 0]
357  return 0;
358  // Assume approximately default options are used for sensible scoring.
359  return std::exp(FileDistance * -0.4f / FileDistanceOptions().UpCost);
360 }
361 
362 static float scopeProximityScore(unsigned ScopeDistance) {
363  // Range: [0.6, 2].
364  // ScopeDistance = [0, 1, 2, 3, 4, 5, 6, 7, .., FileDistance::Unreachable]
365  // Score = [2.0, 1.55, 1.2, 0.93, 0.72, 0.65, 0.65, 0.65, .., 0.6]
367  return 0.6f;
368  return std::max(0.65, 2.0 * std::pow(0.6, ScopeDistance / 2.0));
369 }
370 
371 static std::optional<llvm::StringRef>
372 wordMatching(llvm::StringRef Name, const llvm::StringSet<> *ContextWords) {
373  if (ContextWords)
374  for (const auto &Word : ContextWords->keys())
375  if (Name.contains_insensitive(Word))
376  return Word;
377  return std::nullopt;
378 }
379 
380 SymbolRelevanceSignals::DerivedSignals
382  DerivedSignals Derived;
383  Derived.NameMatchesContext = wordMatching(Name, ContextWords).has_value();
387  if (ScopeProximityMatch) {
388  // For global symbol, the distance is 0.
389  Derived.ScopeProximityDistance =
391  }
392  return Derived;
393 }
394 
397  float Score = 1;
398 
399  if (Forbidden)
400  return 0;
401 
402  Score *= NameMatch;
403 
404  // File proximity scores are [0,1] and we translate them into a multiplier in
405  // the range from 1 to 3.
406  Score *= 1 + 2 * std::max(fileProximityScore(Derived.FileProximityDistance),
408 
410  // Use a constant scope boost for sema results, as scopes of sema results
411  // can be tricky (e.g. class/function scope). Set to the max boost as we
412  // don't load top-level symbols from the preamble and sema results are
413  // always in the accessible scope.
415  ? 2.0
417 
418  if (Derived.NameMatchesContext)
419  Score *= 1.5;
420 
421  // Symbols like local variables may only be referenced within their scope.
422  // Conversely if we're in that scope, it's likely we'll reference them.
423  if (Query == CodeComplete) {
424  // The narrower the scope where a symbol is visible, the more likely it is
425  // to be relevant when it is available.
426  switch (Scope) {
427  case GlobalScope:
428  break;
429  case FileScope:
430  Score *= 1.5f;
431  break;
432  case ClassScope:
433  Score *= 2;
434  break;
435  case FunctionScope:
436  Score *= 4;
437  break;
438  }
439  } else {
440  // For non-completion queries, the wider the scope where a symbol is
441  // visible, the more likely it is to be relevant.
442  switch (Scope) {
443  case GlobalScope:
444  break;
445  case FileScope:
446  Score *= 0.5f;
447  break;
448  default:
449  // TODO: Handle other scopes as we start to use them for index results.
450  break;
451  }
452  }
453 
455  Score *= 5.0;
456 
457  // Penalize non-instance members when they are accessed via a class instance.
458  if (!IsInstanceMember &&
459  (Context == CodeCompletionContext::CCC_DotMemberAccess ||
460  Context == CodeCompletionContext::CCC_ArrowMemberAccess)) {
461  Score *= 0.2f;
462  }
463 
464  if (InBaseClass)
465  Score *= 0.5f;
466 
467  // Penalize for FixIts.
468  if (NeedsFixIts)
469  Score *= 0.5f;
470 
471  // Use a sigmoid style boosting function similar to `References`, which flats
472  // out nicely for large values. This avoids a sharp gradient for heavily
473  // referenced symbols. Use smaller gradient for ScopeRefsInFile since ideally
474  // MainFileRefs <= ScopeRefsInFile.
475  if (MainFileRefs >= 2) {
476  // E.g.: (2, 1.12), (9, 2.0), (48, 3.0).
477  float S = std::pow(MainFileRefs, -0.11);
478  Score *= 11.0 * (1 - S) / (1 + S) + 0.7;
479  }
480  if (ScopeRefsInFile >= 2) {
481  // E.g.: (2, 1.04), (14, 2.0), (109, 3.0), (400, 3.6).
482  float S = std::pow(ScopeRefsInFile, -0.10);
483  Score *= 10.0 * (1 - S) / (1 + S) + 0.7;
484  }
485 
486  return Score;
487 }
488 
489 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
490  const SymbolRelevanceSignals &S) {
491  OS << llvm::formatv("=== Symbol relevance: {0}\n", S.evaluateHeuristics());
492  OS << llvm::formatv("\tName: {0}\n", S.Name);
493  OS << llvm::formatv("\tName match: {0}\n", S.NameMatch);
494  if (S.ContextWords)
495  OS << llvm::formatv(
496  "\tMatching context word: {0}\n",
497  wordMatching(S.Name, S.ContextWords).value_or("<none>"));
498  OS << llvm::formatv("\tForbidden: {0}\n", S.Forbidden);
499  OS << llvm::formatv("\tNeedsFixIts: {0}\n", S.NeedsFixIts);
500  OS << llvm::formatv("\tIsInstanceMember: {0}\n", S.IsInstanceMember);
501  OS << llvm::formatv("\tInBaseClass: {0}\n", S.InBaseClass);
502  OS << llvm::formatv("\tContext: {0}\n", getCompletionKindString(S.Context));
503  OS << llvm::formatv("\tQuery type: {0}\n", static_cast<int>(S.Query));
504  OS << llvm::formatv("\tScope: {0}\n", static_cast<int>(S.Scope));
505 
506  OS << llvm::formatv("\tSymbol URI: {0}\n", S.SymbolURI);
507  OS << llvm::formatv("\tSymbol scope: {0}\n",
508  S.SymbolScope ? *S.SymbolScope : "<None>");
509 
511  if (S.FileProximityMatch) {
512  unsigned Score = fileProximityScore(Derived.FileProximityDistance);
513  OS << llvm::formatv("\tIndex URI proximity: {0} (distance={1})\n", Score,
514  Derived.FileProximityDistance);
515  }
516  OS << llvm::formatv("\tSema file proximity: {0}\n", S.SemaFileProximityScore);
517 
518  OS << llvm::formatv("\tSema says in scope: {0}\n", S.SemaSaysInScope);
519  if (S.ScopeProximityMatch)
520  OS << llvm::formatv("\tIndex scope boost: {0}\n",
522 
523  OS << llvm::formatv(
524  "\tType matched preferred: {0} (Context type: {1}, Symbol type: {2}\n",
526 
527  return OS;
528 }
529 
530 float evaluateSymbolAndRelevance(float SymbolQuality, float SymbolRelevance) {
531  return SymbolQuality * SymbolRelevance;
532 }
533 
534 // Produces an integer that sorts in the same order as F.
535 // That is: a < b <==> encodeFloat(a) < encodeFloat(b).
536 static uint32_t encodeFloat(float F) {
537  static_assert(std::numeric_limits<float>::is_iec559);
538  constexpr uint32_t TopBit = ~(~uint32_t{0} >> 1);
539 
540  // Get the bits of the float. Endianness is the same as for integers.
541  uint32_t U = llvm::FloatToBits(F);
542  // IEEE 754 floats compare like sign-magnitude integers.
543  if (U & TopBit) // Negative float.
544  return 0 - U; // Map onto the low half of integers, order reversed.
545  return U + TopBit; // Positive floats map onto the high half of integers.
546 }
547 
548 std::string sortText(float Score, llvm::StringRef Name) {
549  // We convert -Score to an integer, and hex-encode for readability.
550  // Example: [0.5, "foo"] -> "41000000foo"
551  std::string S;
552  llvm::raw_string_ostream OS(S);
553  llvm::write_hex(OS, encodeFloat(-Score), llvm::HexPrintStyle::Lower,
554  /*Width=*/2 * sizeof(Score));
555  OS << Name;
556  OS.flush();
557  return S;
558 }
559 
560 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
561  const SignatureQualitySignals &S) {
562  OS << llvm::formatv("=== Signature Quality:\n");
563  OS << llvm::formatv("\tNumber of parameters: {0}\n", S.NumberOfParameters);
564  OS << llvm::formatv("\tNumber of optional parameters: {0}\n",
566  OS << llvm::formatv("\tKind: {0}\n", S.Kind);
567  return OS;
568 }
569 
570 } // namespace clangd
571 } // namespace clang
clang::clangd::SymbolRelevanceSignals::merge
void merge(const CodeCompletionResult &SemaResult)
Definition: Quality.cpp:325
clang::clangd::SymbolQualitySignals::Deprecated
bool Deprecated
Definition: Quality.h:57
clang::clangd::hasUsingDeclInMainFile
static bool hasUsingDeclInMainFile(const CodeCompletionResult &R)
Definition: Quality.cpp:43
clang::clangd::SymbolQualitySignals::ImplementationDetail
bool ImplementationDetail
Definition: Quality.h:60
Lower
llvm::APSInt Lower
Definition: NarrowingConversionsCheck.cpp:220
clang::clangd::computeScope
static SymbolRelevanceSignals::AccessibleScope computeScope(const NamedDecl *D)
Definition: Quality.cpp:258
clang::clangd::fileProximityScore
static float fileProximityScore(unsigned FileDistance)
Definition: Quality.cpp:352
clang::clangd::FileDistanceOptions
Definition: FileDistance.h:51
clang::clangd::isInstanceMember
static bool isInstanceMember(const NamedDecl *ND)
Definition: Quality.cpp:154
clang::clangd::SymbolRelevanceSignals::Scope
enum clang::clangd::SymbolRelevanceSignals::AccessibleScope Scope
clang::clangd::hasUnstableLinkage
bool hasUnstableLinkage(const Decl *D)
Whether we must avoid computing linkage for D during code completion.
Definition: AST.cpp:710
clang::clangd::SymbolRelevanceSignals::SymbolScope
std::optional< llvm::StringRef > SymbolScope
Definition: Quality.h:109
Type
NodeType Type
Definition: HTMLGenerator.cpp:75
clang::clangd::SymbolRelevanceSignals::Query
enum clang::clangd::SymbolRelevanceSignals::QueryType Query
clang::clangd::SymbolRelevanceSignals::HadSymbolType
bool HadSymbolType
Definition: Quality.h:134
MAP
#define MAP(DeclType, Category)
clang::clangd::SignatureQualitySignals
Definition: Quality.h:232
IndexResult
const Symbol * IndexResult
Definition: CodeComplete.cpp:208
clang::clangd::evaluateSymbolAndRelevance
float evaluateSymbolAndRelevance(float SymbolQuality, float SymbolRelevance)
Combine symbol quality and relevance into a single score.
Definition: Quality.cpp:530
clang::clangd::SymbolRelevanceSignals::SymbolURI
llvm::StringRef SymbolURI
These are used to calculate proximity between the index symbol and the query.
Definition: Quality.h:101
clang::clangd::SymbolQualitySignals::Variable
@ Variable
Definition: Quality.h:65
clang::clangd::SymbolQualitySignals::Unknown
@ Unknown
Definition: Quality.h:64
clang::clangd::SymbolRelevanceSignals::FunctionScope
@ FunctionScope
Definition: Quality.h:115
clang::clangd::Symbol::Deprecated
@ Deprecated
Indicates if the symbol is deprecated.
Definition: Symbol.h:143
clang::clangd::Symbol::VisibleOutsideFile
@ VisibleOutsideFile
Symbol is visible to other files (not e.g. a static helper function).
Definition: Symbol.h:147
clang::clangd::printNamespaceScope
std::string printNamespaceScope(const DeclContext &DC)
Returns the first enclosing namespace scope starting from DC.
Definition: AST.cpp:294
clang::clangd::SymbolRelevanceSignals::DerivedSignals::FileProximityDistance
unsigned FileProximityDistance
Min distance between SymbolURI and all the headers included by the TU.
Definition: Quality.h:156
clang::clangd::SymbolRelevanceSignals::evaluateHeuristics
float evaluateHeuristics() const
Definition: Quality.cpp:395
SourceMgr
llvm::SourceMgr * SourceMgr
Definition: ConfigCompile.cpp:100
clang::clangd::SymbolQualitySignals::ReservedName
bool ReservedName
Definition: Quality.h:58
clang::clangd::ScopeDistance
Support lookups like FileDistance, but the lookup keys are symbol scopes.
Definition: FileDistance.h:112
clang::clangd::SymbolQualitySignals
Attributes of a symbol that affect how much we like it.
Definition: Quality.h:56
clang::clangd::encodeFloat
static uint32_t encodeFloat(float F)
Definition: Quality.cpp:536
clang::clangd::SymbolRelevanceSignals::computeASTSignals
void computeASTSignals(const CodeCompletionResult &SemaResult)
Definition: Quality.cpp:299
clang::clangd::SymbolRelevanceSignals::ScopeRefsInFile
unsigned ScopeRefsInFile
Number of unique symbols in the main file which belongs to candidate's namespace.
Definition: Quality.h:148
clang::clangd::SymbolRelevanceSignals::Forbidden
bool Forbidden
Definition: Quality.h:93
clang::clangd::SignatureQualitySignals::NumberOfOptionalParameters
uint32_t NumberOfOptionalParameters
Definition: Quality.h:234
clang::clangd::SymbolRelevanceSignals::AccessibleScope
AccessibleScope
Definition: Quality.h:114
FileDistance.h
Score
std::optional< float > Score
Definition: FuzzyMatchTests.cpp:48
clang::clangd::isReservedName
bool isReservedName(llvm::StringRef Name)
Returns true if Name is reserved, like _Foo or __Vector_base.
Definition: SourceCode.h:330
clang::clangd::ASTSignals::RelatedNamespaces
llvm::StringMap< unsigned > RelatedNamespaces
Namespaces whose symbols are used in the file, and the number of such distinct symbols.
Definition: ASTSignals.h:32
ns1::ns2::D
@ D
Definition: CategoricalFeature.h:3
clang::clangd::SymbolQualitySignals::Constructor
@ Constructor
Definition: Quality.h:69
Decl
const FunctionDecl * Decl
Definition: AvoidBindCheck.cpp:98
clang::clangd::Unknown
@ Unknown
Definition: FuzzyMatch.h:56
clang::clangd::CompletionItemKind::Function
@ Function
clang::clangd::SymbolQualitySignals::References
unsigned References
Definition: Quality.h:61
clang::clangd::SymbolQualitySignals::Destructor
@ Destructor
Definition: Quality.h:70
SemaResult
const CodeCompletionResult * SemaResult
Definition: CodeComplete.cpp:207
clang::clangd::Symbol::ImplementationDetail
@ ImplementationDetail
Symbol is an implementation detail.
Definition: Symbol.h:145
clang::clangd::Symbol
The class presents a C++ symbol, e.g.
Definition: Symbol.h:39
clang::clangd::SymbolRelevanceSignals::Context
CodeCompletionContext::Kind Context
Definition: Quality.h:126
clang::clangd::SymbolRelevanceSignals::HadContextType
bool HadContextType
Definition: Quality.h:132
clang::clangd::SignatureQualitySignals::NumberOfParameters
uint32_t NumberOfParameters
Definition: Quality.h:233
clang::clangd::hasDeclInMainFile
static bool hasDeclInMainFile(const Decl &D)
Definition: Quality.cpp:34
Name
Token Name
Definition: MacroToEnumCheck.cpp:87
clang::clangd::scopeProximityScore
static float scopeProximityScore(unsigned ScopeDistance)
Definition: Quality.cpp:362
clang::clangd::SymbolRelevanceSignals::SemaFileProximityScore
float SemaFileProximityScore
FIXME: unify with index proximity score - signals should be source-independent.
Definition: Quality.h:105
clang::clangd::SymbolQualitySignals::Function
@ Function
Definition: Quality.h:68
clang::clangd::SymbolRelevanceSignals::FileProximityMatch
URIDistance * FileProximityMatch
Definition: Quality.h:98
clang::clangd::operator<<
llvm::raw_ostream & operator<<(llvm::raw_ostream &OS, const CodeCompletion &C)
Definition: CodeComplete.cpp:2244
clang::clangd::SymbolRelevanceSignals::TypeMatchesPreferred
bool TypeMatchesPreferred
Definition: Quality.h:136
clang::clangd::categorize
static SymbolQualitySignals::SymbolCategory categorize(const NamedDecl &ND)
Definition: Quality.cpp:53
Symbol.h
clang::clangd::SymbolRelevanceSignals::ScopeProximityMatch
ScopeDistance * ScopeProximityMatch
Definition: Quality.h:108
ASTSignals.h
Word
std::string Word
Definition: FuzzyMatchTests.cpp:40
clang::clangd::getSymbolID
SymbolID getSymbolID(const Decl *D)
Gets the symbol ID for a declaration. Returned SymbolID might be null.
Definition: AST.cpp:348
SourceCode.h
clang::clangd::SymbolRelevanceSignals::Name
llvm::StringRef Name
The name of the symbol (for ContextWords). Must be explicitly assigned.
Definition: Quality.h:88
clang::clangd::SymbolRelevanceSignals::DerivedSignals
Set of derived signals computed by calculateDerivedSignals().
Definition: Quality.h:152
clang::clangd::SymbolRelevanceSignals::DerivedSignals::NameMatchesContext
bool NameMatchesContext
Whether Name contains some word from context.
Definition: Quality.h:154
clang::clangd::SymbolQualitySignals::Namespace
@ Namespace
Definition: Quality.h:71
clang::clangd::SymbolRelevanceSignals::IsInstanceMember
bool IsInstanceMember
Definition: Quality.h:129
clang::clangd::SymbolRelevanceSignals::MainFileSignals
const ASTSignals * MainFileSignals
Definition: Quality.h:142
clang::clangd::SymbolRelevanceSignals::SemaSaysInScope
bool SemaSaysInScope
Definition: Quality.h:111
ID
static char ID
Definition: Logger.cpp:74
clang::clangd::SymbolQualitySignals::Keyword
@ Keyword
Definition: Quality.h:72
clang::clangd::SymbolRelevanceSignals::NeedsFixIts
bool NeedsFixIts
Whether fixits needs to be applied for that completion or not.
Definition: Quality.h:95
clang::clangd::sortText
std::string sortText(float Score, llvm::StringRef Name)
Returns a string that sorts in the same order as (-Score, Tiebreak), for LSP.
Definition: Quality.cpp:548
clang::clangd::SymbolQualitySignals::Macro
@ Macro
Definition: Quality.h:66
clang::clangd::SymbolRelevanceSignals::MainFileRefs
unsigned MainFileRefs
Number of references to the candidate in the main file.
Definition: Quality.h:144
clang::clangd::SymbolRelevanceSignals::ClassScope
@ ClassScope
Definition: Quality.h:116
clang::clangd::SymbolQualitySignals::Operator
@ Operator
Definition: Quality.h:73
clang::clangd::SymbolRelevanceSignals::calculateDerivedSignals
DerivedSignals calculateDerivedSignals() const
Definition: Quality.cpp:381
clang::clangd::SymbolQualitySignals::Type
@ Type
Definition: Quality.h:67
clang::clangd::CompletionItemKind::Constructor
@ Constructor
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27
OS
llvm::raw_string_ostream OS
Definition: TraceTests.cpp:160
clang::clangd::isInsideMainFile
bool isInsideMainFile(SourceLocation Loc, const SourceManager &SM)
Returns true iff Loc is inside the main file.
Definition: SourceCode.cpp:418
clang::clangd::SymbolQualitySignals::SymbolCategory
SymbolCategory
Definition: Quality.h:63
clang::clangd::SymbolQualitySignals::evaluateHeuristics
float evaluateHeuristics() const
Definition: Quality.cpp:196
SymbolInfo
clang::find_all_symbols::SymbolInfo SymbolInfo
Definition: FindAllSymbolsMain.cpp:38
clang::clangd::SymbolRelevanceSignals::ContextWords
llvm::StringSet * ContextWords
Lowercase words relevant to the context (e.g. near the completion point).
Definition: Quality.h:92
CM
CaptureMode CM
Definition: AvoidBindCheck.cpp:61
clang::clangd::SymbolKind::Namespace
@ Namespace
clang::clangd::SignatureQualitySignals::Kind
CodeCompleteConsumer::OverloadCandidate::CandidateKind Kind
Definition: Quality.h:235
clang::clangd::isImplementationDetail
bool isImplementationDetail(const Decl *D)
Returns true if the declaration is considered implementation detail based on heuristics.
Definition: AST.cpp:167
clang::clangd::SymbolQualitySignals::Category
enum clang::clangd::SymbolQualitySignals::SymbolCategory Category
clang::clangd::SymbolRelevanceSignals::DerivedSignals::ScopeProximityDistance
unsigned ScopeProximityDistance
Min distance between SymbolScope and all the available scopes.
Definition: Quality.h:158
Field
const FieldDecl * Field
Definition: MemberwiseConstructor.cpp:260
Quality.h
clang::clangd::SymbolRelevanceSignals::NameMatch
float NameMatch
0-1+ fuzzy-match score for unqualified name. Must be explicitly assigned.
Definition: Quality.h:90
clang::clangd::SymbolRelevanceSignals::CodeComplete
@ CodeComplete
Definition: Quality.h:122
clang::clangd::SymbolRelevanceSignals::InBaseClass
bool InBaseClass
Definition: Quality.h:96
clang::clangd::ASTSignals::ReferencedSymbols
llvm::DenseMap< SymbolID, unsigned > ReferencedSymbols
Number of occurrences of each symbol present in the file.
Definition: ASTSignals.h:29
clang::clangd::SymbolRelevanceSignals::GlobalScope
@ GlobalScope
Definition: Quality.h:118
clang::clangd::SymbolRelevanceSignals
Attributes of a symbol-query pair that affect how much we like it.
Definition: Quality.h:86
clang::clangd::Context
A context is an immutable container for per-request data that must be propagated through layers that ...
Definition: Context.h:69
clang::clangd::CompletionItemKind::Variable
@ Variable
clang::clangd::URIDistance::distance
unsigned distance(llvm::StringRef URI)
Definition: FileDistance.cpp:150
clang::clangd::FileDistance
Definition: FileDistance.h:67
clang::clangd::ScopeDistance::distance
unsigned distance(llvm::StringRef SymbolScope)
Definition: FileDistance.cpp:218
clang::clangd::FileDistance::Unreachable
static constexpr unsigned Unreachable
Definition: FileDistance.h:69
clang::clangd::SymbolRelevanceSignals::FileScope
@ FileScope
Definition: Quality.h:117
clang::clangd::SymbolQualitySignals::merge
void merge(const CodeCompletionResult &SemaCCResult)
Definition: Quality.cpp:175
AST.h
clang::clangd::wordMatching
static std::optional< llvm::StringRef > wordMatching(llvm::StringRef Name, const llvm::StringSet<> *ContextWords)
Definition: Quality.cpp:372