[libclang 7/8] Add support for getting property setter and getter names

[michaelwu]

Summary

This allows libclang to access the actual names of property setters and getters without needing to go through the indexer API. Usually default names are used, but the property can specify a different name.

[michaelwu]

Fix test

[michaelwu]

The patch will be adjusted slightly to replace a // comment with a /* */ comment.

include/clang-c/Index.h

  * \c CXObjCPropertyAttrKind.
  *
  * \param reserved Reserved for future use, pass 0.
  */
 CINDEX_LINKAGE unsigned clang_Cursor_getObjCPropertyAttributes(CXCursor C,
                                                              unsigned reserved);
 
 /**
+ * Given a cursor that represents a property declaration, return the
+ * name of the method that implements the getter.
+ */
+CINDEX_LINKAGE CXString clang_Cursor_getObjCPropertyGetterName(CXCursor C);
+
+/**
+ * Given a cursor that represents a property declaration, return the
+ * name of the method that implements the setter, if any.
+ */
+CINDEX_LINKAGE CXString clang_Cursor_getObjCPropertySetterName(CXCursor C);
+
+/**
  * 'Qualifiers' written next to the return and parameter types in
  * Objective-C method declarations.
  */
 typedef enum {
   CXObjCDeclQualifier_None = 0x0,
   CXObjCDeclQualifier_In = 0x1,
   CXObjCDeclQualifier_Inout = 0x2,
   CXObjCDeclQualifier_Out = 0x4,

test/Index/property-getter-setter.m

+@interface Foo
+@property (assign,readwrite,getter=b,setter=c:) id a;
+@property (assign,readonly,getter=e) id d;
+@property (assign,readwrite) id f;
+@end
+
+// RUN: c-index-test -test-print-type-declaration %s | FileCheck %s
+// CHECK: ObjCPropertyDecl=a:2:52 [getter,assign,readwrite,setter,] (getter=b) (setter=c:) [typedeclaration=id] [typekind=ObjCId]
+// CHECK: ObjCPropertyDecl=d:3:41 [readonly,getter,assign,] (getter=e) [typedeclaration=id] [typekind=ObjCId]
+// CHECK: ObjCPropertyDecl=f:4:33 [assign,readwrite,] [typedeclaration=id] [typekind=ObjCId]

tools/c-index-test/c-index-test.c

PrintCursorComments(Cursor, CommentSchemaFile);
         PRINT_PROP_ATTR(weak);
         PRINT_PROP_ATTR(strong);
         PRINT_PROP_ATTR(unsafe_unretained);
         PRINT_PROP_ATTR(class);
         printf("]");
       }
     }
 
+    if (Cursor.kind == CXCursor_ObjCPropertyDecl) {
+      CXString Name = clang_Cursor_getObjCPropertyGetterName(Cursor);
+      CXString Spelling = clang_getCursorSpelling(Cursor);
+      const char *CName = clang_getCString(Name);
+      const char *CSpelling = clang_getCString(Spelling);
+      if (CName && strcmp(CName, CSpelling)) {
+        printf(" (getter=%s)", CName);
+      }
+      clang_disposeString(Spelling);
+      clang_disposeString(Name);
+    }
+
+    if (Cursor.kind == CXCursor_ObjCPropertyDecl) {
+      CXString Name = clang_Cursor_getObjCPropertySetterName(Cursor);
+      CXString Spelling = clang_getCursorSpelling(Cursor);
+      const char *CName = clang_getCString(Name);
+      const char *CSpelling = clang_getCString(Spelling);
+      char *DefaultSetter = malloc(strlen(CSpelling) + 5);
+      sprintf(DefaultSetter, "set%s:", CSpelling);
+      DefaultSetter[3] &= ~(1 << 5); /* Make uppercase */
+      if (CName && strcmp(CName, DefaultSetter)) {
+        printf(" (setter=%s)", CName);
+      }
+      free(DefaultSetter);
+      clang_disposeString(Spelling);
+      clang_disposeString(Name);
+    }
+
     {
       unsigned QT = clang_Cursor_getObjCDeclQualifiers(Cursor);
       if (QT != CXObjCDeclQualifier_None) {
         printf(" [");
         #define PRINT_OBJC_QUAL(A) \
           if (QT & CXObjCDeclQualifier_##A) printf(#A ",")
         PRINT_OBJC_QUAL(In);
         PRINT_OBJC_QUAL(Inout);

tools/libclang/CIndex.cpp

#define SET_CXOBJCPROP_ATTR(A) \
   SET_CXOBJCPROP_ATTR(strong);
   SET_CXOBJCPROP_ATTR(unsafe_unretained);
   SET_CXOBJCPROP_ATTR(class);
 #undef SET_CXOBJCPROP_ATTR
 
   return Result;
 }
 
+CXString clang_Cursor_getObjCPropertyGetterName(CXCursor C) {
+  if (C.kind != CXCursor_ObjCPropertyDecl)
+    return cxstring::createNull();
+
+  const ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(getCursorDecl(C));
+  Selector sel = PD->getGetterName();
+  if (sel.isNull())
+    return cxstring::createNull();
+
+  return cxstring::createDup(sel.getAsString());
+}
+
+CXString clang_Cursor_getObjCPropertySetterName(CXCursor C) {
+  if (C.kind != CXCursor_ObjCPropertyDecl)
+    return cxstring::createNull();
+
+  const ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(getCursorDecl(C));
+  Selector sel = PD->getSetterName();
+  if (sel.isNull())
+    return cxstring::createNull();
+
+  return cxstring::createDup(sel.getAsString());
+}
+
 unsigned clang_Cursor_getObjCDeclQualifiers(CXCursor C) {
   if (!clang_isDeclaration(C.kind))
     return CXObjCDeclQualifier_None;
 
   Decl::ObjCDeclQualifier QT = Decl::OBJC_TQ_None;
   const Decl *D = getCursorDecl(C);
   if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
     QT = MD->getObjCDeclQualifier();

tools/libclang/libclang.exports

 clang_Cursor_getCXXManglings
 clang_Cursor_getMangling
 clang_Cursor_getObjCManglings
 clang_Cursor_getParsedComment
 clang_Cursor_getRawCommentText
 clang_Cursor_getNumArguments
 clang_Cursor_getObjCDeclQualifiers
 clang_Cursor_getObjCPropertyAttributes
+clang_Cursor_getObjCPropertyGetterName
+clang_Cursor_getObjCPropertySetterName
 clang_Cursor_getObjCSelectorIndex
 clang_Cursor_getOffsetOfField
 clang_Cursor_getSpellingNameRange
 clang_Cursor_getTranslationUnit
 clang_Cursor_getReceiverType
 clang_Cursor_isAnonymous
 clang_Cursor_isBitField
 clang_Cursor_isDynamicCall