From 178a0d4cb5d8b8600dd2ae78716d2cf992c1345d Mon Sep 17 00:00:00 2001
From: Jake Schwartz <jakehschwartz@gmail.com>
Date: Tue, 8 Feb 2022 11:15:00 +0000
Subject: [PATCH] Include default match statement to CaseClassCodec macro

Also add compile warnings to the build.

JAVA-4319
---
 .../scala/bson/codecs/macrocodecs/CaseClassCodec.scala   | 2 +-
 build.gradle                                             | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/bson-scala/src/main/scala/org/mongodb/scala/bson/codecs/macrocodecs/CaseClassCodec.scala b/bson-scala/src/main/scala/org/mongodb/scala/bson/codecs/macrocodecs/CaseClassCodec.scala
index b141acdafa1..b62883abb9a 100644
--- a/bson-scala/src/main/scala/org/mongodb/scala/bson/codecs/macrocodecs/CaseClassCodec.scala
+++ b/bson-scala/src/main/scala/org/mongodb/scala/bson/codecs/macrocodecs/CaseClassCodec.scala
@@ -350,7 +350,7 @@ private[codecs] object CaseClassCodec {
                   val instanceValue = value.asInstanceOf[${classType}]
                   ..${writeClassValues(fields, ignoredFields(classType))}"""
         }.toSeq
-      }
+      } :+ cq"""_ => throw new BsonInvalidOperationException("Unexpected class type: " + className)"""
       q"""
         writer.writeStartDocument()
         this.writeClassFieldName(writer, className, encoderContext)
diff --git a/build.gradle b/build.gradle
index 296dfa5e16c..3a9c29f885d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -128,6 +128,15 @@ configure(scalaProjects) {
 
     tasks.withType(ScalaCompile) {
         scalaCompileOptions.deprecation = false
+        if(scalaVersion.startsWith("2.13")) {
+            scalaCompileOptions.additionalParameters = [
+                    "-feature",
+                    "-unchecked",
+                    "-language:reflectiveCalls",
+                    "-Wconf:cat=deprecation:ws,any:e",
+                    "-Xlint:strict-unsealed-patmat"
+            ]
+        }
     }
 
     tasks.withType(GenerateModuleMetadata) {