[libclang] Introduce clang_Cursor_isObjCOptional, which returns whether the declaration was affected by "@optional"
rdar://14348525.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185722 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang-c/Index.h b/include/clang-c/Index.h
index 21b7dba..aa4b46f 100644
--- a/include/clang-c/Index.h
+++ b/include/clang-c/Index.h
@@ -3414,6 +3414,13 @@
CINDEX_LINKAGE unsigned clang_Cursor_getObjCDeclQualifiers(CXCursor C);
/**
+ * \brief Given a cursor that represents an ObjC method or property declaration,
+ * return non-zero if the declaration was affected by "@optional".
+ * Returns zero if the cursor is not such a declaration or it is "@required".
+ */
+CINDEX_LINKAGE unsigned clang_Cursor_isObjCOptional(CXCursor C);
+
+/**
* \brief Returns non-zero if the given cursor is a variadic function or method.
*/
CINDEX_LINKAGE unsigned clang_Cursor_isVariadic(CXCursor C);