1//===--- DeclReferenceMap.cpp - Map Decls to their references -------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  DeclReferenceMap creates a mapping from Decls to the ASTLocations that
11//  reference them.
12//
13//===----------------------------------------------------------------------===//
14
15#include "clang/Index/DeclReferenceMap.h"
16#include "clang/Index/ASTLocation.h"
17#include "ASTVisitor.h"
18using namespace clang;
19using namespace idx;
20
21namespace {
22
23class RefMapper : public ASTVisitor<RefMapper> {
24  DeclReferenceMap::MapTy &Map;
25
26public:
27  RefMapper(DeclReferenceMap::MapTy &map) : Map(map) { }
28
29  void VisitDeclRefExpr(DeclRefExpr *Node);
30  void VisitMemberExpr(MemberExpr *Node);
31  void VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node);
32
33  void VisitTypedefTypeLoc(TypedefTypeLoc TL);
34  void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL);
35};
36
37} // anonymous namespace
38
39//===----------------------------------------------------------------------===//
40// RefMapper Implementation
41//===----------------------------------------------------------------------===//
42
43void RefMapper::VisitDeclRefExpr(DeclRefExpr *Node) {
44  NamedDecl *PrimD = cast<NamedDecl>(Node->getDecl()->getCanonicalDecl());
45  Map.insert(std::make_pair(PrimD, ASTLocation(CurrentDecl, Node)));
46}
47
48void RefMapper::VisitMemberExpr(MemberExpr *Node) {
49  NamedDecl *PrimD = cast<NamedDecl>(Node->getMemberDecl()->getCanonicalDecl());
50  Map.insert(std::make_pair(PrimD, ASTLocation(CurrentDecl, Node)));
51}
52
53void RefMapper::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
54  Map.insert(std::make_pair(Node->getDecl(), ASTLocation(CurrentDecl, Node)));
55}
56
57void RefMapper::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
58  NamedDecl *ND = TL.getTypedefNameDecl();
59  Map.insert(std::make_pair(ND, ASTLocation(CurrentDecl, ND, TL.getNameLoc())));
60}
61
62void RefMapper::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
63  NamedDecl *ND = TL.getIFaceDecl();
64  Map.insert(std::make_pair(ND, ASTLocation(CurrentDecl, ND, TL.getNameLoc())));
65}
66
67//===----------------------------------------------------------------------===//
68// DeclReferenceMap Implementation
69//===----------------------------------------------------------------------===//
70
71DeclReferenceMap::DeclReferenceMap(ASTContext &Ctx) {
72  RefMapper(Map).Visit(Ctx.getTranslationUnitDecl());
73}
74
75DeclReferenceMap::astlocation_iterator
76DeclReferenceMap::refs_begin(NamedDecl *D) const {
77  NamedDecl *Prim = cast<NamedDecl>(D->getCanonicalDecl());
78  return astlocation_iterator(Map.lower_bound(Prim));
79}
80
81DeclReferenceMap::astlocation_iterator
82DeclReferenceMap::refs_end(NamedDecl *D) const {
83  NamedDecl *Prim = cast<NamedDecl>(D->getCanonicalDecl());
84  return astlocation_iterator(Map.upper_bound(Prim));
85}
86
87bool DeclReferenceMap::refs_empty(NamedDecl *D) const {
88  NamedDecl *Prim = cast<NamedDecl>(D->getCanonicalDecl());
89  return refs_begin(Prim) == refs_end(Prim);
90}
91