IndexingContext.cpp

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//===- IndexingContext.cpp - Indexing context data ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "IndexingContext.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Index/IndexDataConsumer.h"
 
using namespace clang;
using namespace index;
 
static bool isGeneratedDecl(const Decl *D) {
  if (auto *attr = D->getAttr<ExternalSourceSymbolAttr>()) {
    return attr->getGeneratedDeclaration();
  }
  return false;
}
 
bool IndexingContext::shouldIndex(const Decl *D) {
  return !isGeneratedDecl(D);
}
 
const LangOptions &IndexingContext::getLangOpts() const {
  return Ctx->getLangOpts();
}
 
bool IndexingContext::shouldIndexFunctionLocalSymbols() const {
  return IndexOpts.IndexFunctionLocals;
}
 
bool IndexingContext::shouldIndexImplicitInstantiation() const {
  return IndexOpts.IndexImplicitInstantiation;
}
 
bool IndexingContext::shouldIndexParametersInDeclarations() const {
  return IndexOpts.IndexParametersInDeclarations;
}
 
bool IndexingContext::shouldIndexTemplateParameters() const {
  return IndexOpts.IndexTemplateParameters;
}
 
bool IndexingContext::handleDecl(const Decl *D,
                                 SymbolRoleSet Roles,
                                 ArrayRef<SymbolRelation> Relations) {
  return handleDecl(D, D->getLocation(), Roles, Relations);
}
 
bool IndexingContext::handleDecl(const Decl *D, SourceLocation Loc,
                                 SymbolRoleSet Roles,
                                 ArrayRef<SymbolRelation> Relations,
                                 const DeclContext *DC) {
  if (!DC)
    DC = D->getDeclContext();
 
  const Decl *OrigD = D;
  if (isa<ObjCPropertyImplDecl>(D)) {
    D = cast<ObjCPropertyImplDecl>(D)->getPropertyDecl();
  }
  return handleDeclOccurrence(D, Loc, /*IsRef=*/false, cast<Decl>(DC),
                              Roles, Relations,
                              nullptr, OrigD, DC);
}
 
bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
                                      const NamedDecl *Parent,
                                      const DeclContext *DC,
                                      SymbolRoleSet Roles,
                                      ArrayRef<SymbolRelation> Relations,
                                      const Expr *RefE) {
  if (!shouldIndexFunctionLocalSymbols() && isFunctionLocalSymbol(D))
    return true;
 
  if (!shouldIndexTemplateParameters() &&
      (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
       isa<TemplateTemplateParmDecl>(D))) {
    return true;
  }
  return handleDeclOccurrence(