1#include "clang/ExtractAPI/AvailabilityInfo.h"
2#include "clang/AST/Attr.h"
3#include "llvm/ADT/STLExtras.h"
4
5using namespace clang;
6using namespace extractapi;
7
8AvailabilitySet::AvailabilitySet(const Decl *Decl) {
9  // Collect availability attributes from all redeclrations.
10  for (const auto *RD : Decl->redecls()) {
11    if (const auto *A = RD->getAttr<UnavailableAttr>()) {
12      if (!A->isImplicit()) {
13        this->Availabilities.clear();
14        UnconditionallyUnavailable = true;
15      }
16    }
17
18    if (const auto *A = RD->getAttr<DeprecatedAttr>()) {
19      if (!A->isImplicit()) {
20        this->Availabilities.clear();
21        UnconditionallyDeprecated = true;
22      }
23    }
24
25    for (const auto *Attr : RD->specific_attrs<AvailabilityAttr>()) {
26      StringRef Domain = Attr->getPlatform()->getName();
27      auto *Availability =
28          llvm::find_if(Availabilities, [Domain](const AvailabilityInfo &Info) {
29            return Domain.equals(Info.Domain);
30          });
31      if (Availability != Availabilities.end()) {
32        // Get the highest introduced version for all redeclarations.
33        if (Availability->Introduced < Attr->getIntroduced())
34          Availability->Introduced = Attr->getIntroduced();
35
36        // Get the lowest deprecated version for all redeclarations.
37        if (Availability->Deprecated > Attr->getDeprecated())
38          Availability->Deprecated = Attr->getDeprecated();
39
40        // Get the lowest obsoleted version for all redeclarations.
41        if (Availability->Obsoleted > Attr->getObsoleted())
42          Availability->Obsoleted = Attr->getObsoleted();
43      } else {
44        Availabilities.emplace_back(Domain, Attr->getIntroduced(),
45                                    Attr->getDeprecated(),
46                                    Attr->getObsoleted());
47      }
48    }
49  }
50}
51