Canged CodedInputStream.ReadTag to use boolean result with out params to
support reading a field name rather than a field tag.
diff --git a/src/ProtocolBuffersLite.Test/TestProtos/UnitTestLiteProtoFile.cs b/src/ProtocolBuffersLite.Test/TestProtos/UnitTestLiteProtoFile.cs
index 7d205f2..2e9d085 100644
--- a/src/ProtocolBuffersLite.Test/TestProtos/UnitTestLiteProtoFile.cs
+++ b/src/ProtocolBuffersLite.Test/TestProtos/UnitTestLiteProtoFile.cs
@@ -1250,11 +1250,12 @@
           }

           

           public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-            while (true) {

-              uint tag = input.ReadTag();

+            uint tag;

+            string field_name;

+            while (input.ReadTag(out tag, out field_name)) {

               switch (tag) {

                 case 0: {

-                  return this;

+                  throw InvalidProtocolBufferException.InvalidTag();

                 }

                 default: {

                   if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -1269,6 +1270,8 @@
                 }

               }

             }

+            

+            return this;

           }

           

           

@@ -1465,11 +1468,12 @@
           }

           

           public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-            while (true) {

-              uint tag = input.ReadTag();

+            uint tag;

+            string field_name;

+            while (input.ReadTag(out tag, out field_name)) {

               switch (tag) {

                 case 0: {

-                  return this;

+                  throw InvalidProtocolBufferException.InvalidTag();

                 }

                 default: {

                   if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -1484,6 +1488,8 @@
                 }

               }

             }

+            

+            return this;

           }

           

           

@@ -1680,11 +1686,12 @@
           }

           

           public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-            while (true) {

-              uint tag = input.ReadTag();

+            uint tag;

+            string field_name;

+            while (input.ReadTag(out tag, out field_name)) {

               switch (tag) {

                 case 0: {

-                  return this;

+                  throw InvalidProtocolBufferException.InvalidTag();

                 }

                 default: {

                   if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -1699,6 +1706,8 @@
                 }

               }

             }

+            

+            return this;

           }

           

           

@@ -3607,11 +3616,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -3958,6 +3968,8 @@
             }

           }

         }

+        

+        return this;

       }

       

       

@@ -5724,11 +5736,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -5743,6 +5756,8 @@
             }

           }

         }

+        

+        return this;

       }

       

       

@@ -6430,11 +6445,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -6575,6 +6591,8 @@
             }

           }

         }

+        

+        return this;

       }

       

       

@@ -7123,11 +7141,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -7138,6 +7157,8 @@
             }

           }

         }

+        

+        return this;

       }

       

     }

@@ -7316,11 +7337,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -7335,6 +7357,8 @@
             }

           }

         }

+        

+        return this;

       }

       

       

@@ -7531,11 +7555,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -7550,6 +7575,8 @@
             }

           }

         }

+        

+        return this;

       }

       

       

@@ -7732,11 +7759,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -7747,6 +7775,8 @@
             }

           }

         }

+        

+        return this;

       }

       

     }

@@ -7905,11 +7935,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -7920,6 +7951,8 @@
             }

           }

         }

+        

+        return this;

       }

       

     }

@@ -8098,11 +8131,12 @@
       }

       

       public override Builder MergeFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {

-        while (true) {

-          uint tag = input.ReadTag();

+        uint tag;

+        string field_name;

+        while (input.ReadTag(out tag, out field_name)) {

           switch (tag) {

             case 0: {

-              return this;

+              throw InvalidProtocolBufferException.InvalidTag();

             }

             default: {

               if (pb::WireFormat.IsEndGroupTag(tag)) {

@@ -8117,6 +8151,8 @@
             }

           }

         }

+        

+        return this;

       }