[IRGen] Remove unused ObjC selector-family-related code

Author: stephan-tolksdorf

lib/IRGen/GenObjC.cpp

@@ -487,21 +487,6 @@ namespace {
 
     static constexpr struct ForGetter_t { } ForGetter{};
     static constexpr struct ForSetter_t { } ForSetter{};
-
-#define FOREACH_FAMILY(FAMILY)         \
-    FAMILY(Alloc, "alloc")             \
-    FAMILY(Copy, "copy")               \
-    FAMILY(Init, "init")               \
-    FAMILY(MutableCopy, "mutableCopy") \
-    FAMILY(New, "new")
-
-    // Note that these are in parallel with 'prefixes', below.
-    enum class Family {
-      None,
-#define GET_LABEL(LABEL, PREFIX) LABEL,
-      FOREACH_FAMILY(GET_LABEL)
-#undef GET_LABEL
-    };
 
     Selector() = default;
 
@@ -571,31 +556,6 @@ namespace {
     StringRef str() const {
       return Text;
     }
-
-    /// Return the family string of this selector.
-    Family getFamily() const {
-      StringRef text = str();
-      while (!text.empty() && text[0] == '_') text = text.substr(1);
-
-#define CHECK_PREFIX(LABEL, PREFIX) \
-      if (hasPrefix(text, PREFIX)) return Family::LABEL;
-      FOREACH_FAMILY(CHECK_PREFIX)
-#undef CHECK_PREFIX
-
-      return Family::None;
-    }
-
-  private:
-    /// Does the given selector start with the given string as a
-    /// prefix, in the sense of the selector naming conventions?
-    static bool hasPrefix(StringRef text, StringRef prefix) {
-      if (!text.startswith(prefix)) return false;
-      if (text.size() == prefix.size()) return true;
-      assert(text.size() > prefix.size());
-      return !clang::isLowercase(text[prefix.size()]);
-    }
-
-#undef FOREACH_FAMILY
   };
 } // end anonymous namespace