test(proto): Add message to test oneof name conflict resolution

PiperOrigin-RevId: 891521448

Author: rishesh007

upb/message/test.proto

@@ -219,3 +219,11 @@ message TestRepeatedMessageBig {
   repeated TestRepeatedMessageBig repeated_message = 1;
   repeated bytes repeated_bytes = 2;
 }
+
+message TestDuplicateFunctionNames {
+  optional bool random = 6;
+  oneof value {
+    bytes body = 1;
+    bool clear_body = 2;
+  }
+}

upb_generator/c/names.cc

@@ -69,12 +69,9 @@ constexpr uint32_t kAnyField = UINT32_MAX;
 
 // Prefixes used by C code generator for field access.
 static constexpr std::array<Prefix, 7> kPrefixes{
-    Prefix{"clear_", kContainerField | kStringField},
-    Prefix{"delete_", kContainerField},
-    Prefix{"add_", kContainerField},
-    Prefix{"resize_", kContainerField},
-    Prefix{"set_", kAnyField},
-    Prefix{"has_", kAnyField},
+    Prefix{"clear_", kAnyField},     Prefix{"delete_", kContainerField},
+    Prefix{"add_", kContainerField}, Prefix{"resize_", kContainerField},
+    Prefix{"set_", kAnyField},       Prefix{"has_", kAnyField},
     Prefix{"mutable_", kAnyField},
 };