1 //===- CXCursor.h - Routines for manipulating CXCursors -------------------===//
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 // This file defines routines for manipulating CXCursors.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_TOOLS_LIBCLANG_CXCURSOR_H
15 #define LLVM_CLANG_TOOLS_LIBCLANG_CXCURSOR_H
16 
17 #include "clang-c/Index.h"
18 #include "clang/Basic/SourceLocation.h"
19 #include "llvm/ADT/PointerUnion.h"
20 #include <utility>
21 
22 namespace clang {
23 
24 class ASTContext;
25 class ASTUnit;
26 class Attr;
27 class CXXBaseSpecifier;
28 class Decl;
29 class Expr;
30 class FieldDecl;
31 class InclusionDirective;
32 class LabelStmt;
33 class MacroDefinition;
34 class MacroExpansion;
35 class NamedDecl;
36 class ObjCInterfaceDecl;
37 class ObjCProtocolDecl;
38 class OverloadedTemplateStorage;
39 class OverloadExpr;
40 class Stmt;
41 class TemplateDecl;
42 class TemplateName;
43 class TypeDecl;
44 class VarDecl;
45 class IdentifierInfo;
46 
47 namespace cxcursor {
48 
49 CXCursor getCursor(CXTranslationUnit, SourceLocation);
50 
51 CXCursor MakeCXCursor(const clang::Attr *A, const clang::Decl *Parent,
52                       CXTranslationUnit TU);
53 CXCursor MakeCXCursor(const clang::Decl *D, CXTranslationUnit TU,
54                       SourceRange RegionOfInterest = SourceRange(),
55                       bool FirstInDeclGroup = true);
56 CXCursor MakeCXCursor(const clang::Stmt *S, const clang::Decl *Parent,
57                       CXTranslationUnit TU,
58                       SourceRange RegionOfInterest = SourceRange());
59 CXCursor MakeCXCursorInvalid(CXCursorKind K, CXTranslationUnit TU = nullptr);
60 
61 /// \brief Create an Objective-C superclass reference at the given location.
62 CXCursor MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
63                                      SourceLocation Loc,
64                                      CXTranslationUnit TU);
65 
66 /// \brief Unpack an ObjCSuperClassRef cursor into the interface it references
67 /// and optionally the location where the reference occurred.
68 std::pair<const ObjCInterfaceDecl *, SourceLocation>
69   getCursorObjCSuperClassRef(CXCursor C);
70 
71 /// \brief Create an Objective-C protocol reference at the given location.
72 CXCursor MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto,
73                                    SourceLocation Loc,
74                                    CXTranslationUnit TU);
75 
76 /// \brief Unpack an ObjCProtocolRef cursor into the protocol it references
77 /// and optionally the location where the reference occurred.
78 std::pair<const ObjCProtocolDecl *, SourceLocation>
79   getCursorObjCProtocolRef(CXCursor C);
80 
81 /// \brief Create an Objective-C class reference at the given location.
82 CXCursor MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class,
83                                 SourceLocation Loc,
84                                 CXTranslationUnit TU);
85 
86 /// \brief Unpack an ObjCClassRef cursor into the class it references
87 /// and optionally the location where the reference occurred.
88 std::pair<const ObjCInterfaceDecl *, SourceLocation>
89   getCursorObjCClassRef(CXCursor C);
90 
91 /// \brief Create a type reference at the given location.
92 CXCursor MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc,
93                            CXTranslationUnit TU);
94 
95 /// \brief Unpack a TypeRef cursor into the class it references
96 /// and optionally the location where the reference occurred.
97 std::pair<const TypeDecl *, SourceLocation> getCursorTypeRef(CXCursor C);
98 
99 /// \brief Create a reference to a template at the given location.
100 CXCursor MakeCursorTemplateRef(const TemplateDecl *Template, SourceLocation Loc,
101                                CXTranslationUnit TU);
102 
103 /// \brief Unpack a TemplateRef cursor into the template it references and
104 /// the location where the reference occurred.
105 std::pair<const TemplateDecl *, SourceLocation>
106   getCursorTemplateRef(CXCursor C);
107 
108 /// \brief Create a reference to a namespace or namespace alias at the given
109 /// location.
110 CXCursor MakeCursorNamespaceRef(const NamedDecl *NS, SourceLocation Loc,
111                                 CXTranslationUnit TU);
112 
113 /// \brief Unpack a NamespaceRef cursor into the namespace or namespace alias
114 /// it references and the location where the reference occurred.
115 std::pair<const NamedDecl *, SourceLocation> getCursorNamespaceRef(CXCursor C);
116 
117 /// \brief Create a reference to a variable at the given location.
118 CXCursor MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc,
119                                CXTranslationUnit TU);
120 
121 /// \brief Unpack a VariableRef cursor into the variable it references and the
122 /// location where the where the reference occurred.
123 std::pair<const VarDecl *, SourceLocation> getCursorVariableRef(CXCursor C);
124 
125 /// \brief Create a reference to a field at the given location.
126 CXCursor MakeCursorMemberRef(const FieldDecl *Field, SourceLocation Loc,
127                              CXTranslationUnit TU);
128 
129 /// \brief Unpack a MemberRef cursor into the field it references and the
130 /// location where the reference occurred.
131 std::pair<const FieldDecl *, SourceLocation> getCursorMemberRef(CXCursor C);
132 
133 /// \brief Create a CXX base specifier cursor.
134 CXCursor MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
135                                     CXTranslationUnit TU);
136 
137 /// \brief Unpack a CXXBaseSpecifier cursor into a CXXBaseSpecifier.
138 const CXXBaseSpecifier *getCursorCXXBaseSpecifier(CXCursor C);
139 
140 /// \brief Create a preprocessing directive cursor.
141 CXCursor MakePreprocessingDirectiveCursor(SourceRange Range,
142                                           CXTranslationUnit TU);
143 
144 /// \brief Unpack a given preprocessing directive to retrieve its source range.
145 SourceRange getCursorPreprocessingDirective(CXCursor C);
146 
147 /// \brief Create a macro definition cursor.
148 CXCursor MakeMacroDefinitionCursor(const MacroDefinition *,
149                                    CXTranslationUnit TU);
150 
151 /// \brief Unpack a given macro definition cursor to retrieve its
152 /// source range.
153 const MacroDefinition *getCursorMacroDefinition(CXCursor C);
154 
155 /// \brief Create a macro expansion cursor.
156 CXCursor MakeMacroExpansionCursor(MacroExpansion *,
157                                   CXTranslationUnit TU);
158 
159 /// \brief Create a "pseudo" macro expansion cursor, using a macro definition
160 /// and a source location.
161 CXCursor MakeMacroExpansionCursor(MacroDefinition *, SourceLocation Loc,
162                                   CXTranslationUnit TU);
163 
164 /// \brief Wraps a macro expansion cursor and provides a common interface
165 /// for a normal macro expansion cursor or a "pseudo" one.
166 ///
167 /// "Pseudo" macro expansion cursors (essentially a macro definition along with
168 /// a source location) are created in special cases, for example they can be
169 /// created for identifiers inside macro definitions, if these identifiers are
170 /// macro names.
171 class MacroExpansionCursor {
172   CXCursor C;
173 
isPseudo()174   bool isPseudo() const {
175     return C.data[1] != nullptr;
176   }
getAsMacroDefinition()177   const MacroDefinition *getAsMacroDefinition() const {
178     assert(isPseudo());
179     return static_cast<const MacroDefinition *>(C.data[0]);
180   }
getAsMacroExpansion()181   const MacroExpansion *getAsMacroExpansion() const {
182     assert(!isPseudo());
183     return static_cast<const MacroExpansion *>(C.data[0]);
184   }
getPseudoLoc()185   SourceLocation getPseudoLoc() const {
186     assert(isPseudo());
187     return SourceLocation::getFromPtrEncoding(C.data[1]);
188   }
189 
190 public:
MacroExpansionCursor(CXCursor C)191   MacroExpansionCursor(CXCursor C) : C(C) {
192     assert(C.kind == CXCursor_MacroExpansion);
193   }
194 
195   const IdentifierInfo *getName() const;
196   const MacroDefinition *getDefinition() const;
197   SourceRange getSourceRange() const;
198 };
199 
200 /// \brief Unpack a given macro expansion cursor to retrieve its info.
getCursorMacroExpansion(CXCursor C)201 static inline MacroExpansionCursor getCursorMacroExpansion(CXCursor C) {
202   return C;
203 }
204 
205 /// \brief Create an inclusion directive cursor.
206 CXCursor MakeInclusionDirectiveCursor(InclusionDirective *,
207                                       CXTranslationUnit TU);
208 
209 /// \brief Unpack a given inclusion directive cursor to retrieve its
210 /// source range.
211 const InclusionDirective *getCursorInclusionDirective(CXCursor C);
212 
213 /// \brief Create a label reference at the given location.
214 CXCursor MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
215                             CXTranslationUnit TU);
216 
217 /// \brief Unpack a label reference into the label statement it refers to and
218 /// the location of the reference.
219 std::pair<const LabelStmt *, SourceLocation> getCursorLabelRef(CXCursor C);
220 
221 /// \brief Create a overloaded declaration reference cursor for an expression.
222 CXCursor MakeCursorOverloadedDeclRef(const OverloadExpr *E,
223                                      CXTranslationUnit TU);
224 
225 /// \brief Create a overloaded declaration reference cursor for a declaration.
226 CXCursor MakeCursorOverloadedDeclRef(const Decl *D, SourceLocation Location,
227                                      CXTranslationUnit TU);
228 
229 /// \brief Create a overloaded declaration reference cursor for a template name.
230 CXCursor MakeCursorOverloadedDeclRef(TemplateName Template,
231                                      SourceLocation Location,
232                                      CXTranslationUnit TU);
233 
234 /// \brief Internal storage for an overloaded declaration reference cursor;
235 typedef llvm::PointerUnion3<const OverloadExpr *, const Decl *,
236                             OverloadedTemplateStorage *>
237   OverloadedDeclRefStorage;
238 
239 /// \brief Unpack an overloaded declaration reference into an expression,
240 /// declaration, or template name along with the source location.
241 std::pair<OverloadedDeclRefStorage, SourceLocation>
242   getCursorOverloadedDeclRef(CXCursor C);
243 
244 const Decl *getCursorDecl(CXCursor Cursor);
245 const Expr *getCursorExpr(CXCursor Cursor);
246 const Stmt *getCursorStmt(CXCursor Cursor);
247 const Attr *getCursorAttr(CXCursor Cursor);
248 const Decl *getCursorParentDecl(CXCursor Cursor);
249 
250 ASTContext &getCursorContext(CXCursor Cursor);
251 ASTUnit *getCursorASTUnit(CXCursor Cursor);
252 CXTranslationUnit getCursorTU(CXCursor Cursor);
253 
254 void getOverriddenCursors(CXCursor cursor,
255                           SmallVectorImpl<CXCursor> &overridden);
256 
257 /// \brief Create an opaque  pool used for fast generation of overriden
258 /// CXCursor arrays.
259 void *createOverridenCXCursorsPool();
260 
261 /// \brief Dispose of the overriden CXCursors pool.
262 void disposeOverridenCXCursorsPool(void *pool);
263 
264 /// \brief Returns a index/location pair for a selector identifier if the cursor
265 /// points to one.
266 std::pair<int, SourceLocation> getSelectorIdentifierIndexAndLoc(CXCursor);
getSelectorIdentifierIndex(CXCursor cursor)267 static inline int getSelectorIdentifierIndex(CXCursor cursor) {
268   return getSelectorIdentifierIndexAndLoc(cursor).first;
269 }
getSelectorIdentifierLoc(CXCursor cursor)270 static inline SourceLocation getSelectorIdentifierLoc(CXCursor cursor) {
271   return getSelectorIdentifierIndexAndLoc(cursor).second;
272 }
273 
274 CXCursor getSelectorIdentifierCursor(int SelIdx, CXCursor cursor);
275 
getTypeRefedCallExprCursor(CXCursor cursor)276 static inline CXCursor getTypeRefedCallExprCursor(CXCursor cursor) {
277   CXCursor newCursor = cursor;
278   if (cursor.kind == CXCursor_CallExpr)
279     newCursor.xdata = 1;
280   return newCursor;
281 }
282 
283 CXCursor getTypeRefCursor(CXCursor cursor);
284 
285 /// \brief Generate a USR for \arg D and put it in \arg Buf.
286 /// \returns true if no USR was computed or the result should be ignored,
287 /// false otherwise.
288 bool getDeclCursorUSR(const Decl *D, SmallVectorImpl<char> &Buf);
289 
290 bool operator==(CXCursor X, CXCursor Y);
291 
292 inline bool operator!=(CXCursor X, CXCursor Y) {
293   return !(X == Y);
294 }
295 
296 /// \brief Return true if the cursor represents a declaration that is the
297 /// first in a declaration group.
298 bool isFirstInDeclGroup(CXCursor C);
299 
300 }} // end namespace: clang::cxcursor
301 
302 #endif
303