add explicit types. prepare -Xsource:3

Author: xuwei-k

core/src/main/scala/scalikejdbc/async/internal/PoolableAsyncConnection.scala

@@ -16,6 +16,7 @@
 package scalikejdbc.async.internal
 
 import com.github.jasync.sql.db.ConcreteConnection
+import com.github.jasync.sql.db.Connection
 import com.github.jasync.sql.db.pool.ConnectionPool
 import scalikejdbc.async.NonSharedAsyncConnection
 import scalikejdbc.async.ShortenedNames._
@@ -38,7 +39,7 @@ private[scalikejdbc] abstract class PoolableAsyncConnection[
   ): Future[NonSharedAsyncConnection] =
     Future.failed(new UnsupportedOperationException)
 
-  private[scalikejdbc] lazy val underlying = pool
+  private[scalikejdbc] lazy val underlying: Connection = pool
 
   /**
    * Close or release this connection.

core/src/main/scala/scalikejdbc/async/internal/mysql/SingleAsyncMySQLConnection.scala

@@ -16,6 +16,7 @@
 package scalikejdbc.async.internal.mysql
 
 import com.github.jasync.sql.db.Configuration
+import com.github.jasync.sql.db.Connection
 import com.github.jasync.sql.db.mysql.util.URLParser
 import scalikejdbc.async._, internal._
 
@@ -36,7 +37,7 @@ private[scalikejdbc] case class SingleAsyncMySQLConnection(
   override protected def parseUrl(url: String): Configuration =
     URLParser.INSTANCE.parse(url, StandardCharsets.UTF_8)
 
-  private[scalikejdbc] val underlying = {
+  private[scalikejdbc] val underlying: Connection = {
     new com.github.jasync.sql.db.mysql.MySQLConnection(
       configuration(url, user, password, connectionSettings)
     )

core/src/main/scala/scalikejdbc/async/internal/postgresql/SingleAsyncPostgreSQLConnection.scala

@@ -16,6 +16,7 @@
 package scalikejdbc.async.internal.postgresql
 
 import com.github.jasync.sql.db.Configuration
+import com.github.jasync.sql.db.Connection
 import com.github.jasync.sql.db.postgresql.util.URLParser
 import scalikejdbc.async._, internal._
 
@@ -36,7 +37,7 @@ private[scalikejdbc] case class SingleAsyncPostgreSQLConnection(
   override protected def parseUrl(url: String): Configuration =
     URLParser.INSTANCE.parse(url, StandardCharsets.UTF_8)
 
-  private[scalikejdbc] val underlying = {
+  private[scalikejdbc] val underlying: Connection = {
     new com.github.jasync.sql.db.postgresql.PostgreSQLConnection(
       configuration(url, user, password, connectionSettings)
     )

core/src/test/scala/programmerlist/Company.scala

@@ -26,7 +26,7 @@ case class Company(
 
 object Company extends SQLSyntaxSupport[Company] with ShortenedNames {
 
-  override val columnNames =
+  override val columnNames: Seq[String] =
     Seq("id", "name", "url", "created_at", "deleted_at")
 
   def apply(c: SyntaxProvider[Company])(rs: WrappedResultSet): Company =

core/src/test/scala/programmerlist/Programmer.scala

@@ -52,7 +52,7 @@ case class Programmer(
 
 object Programmer extends SQLSyntaxSupport[Programmer] with ShortenedNames {
 
-  override val columnNames =
+  override val columnNames: Seq[String] =
     Seq("id", "name", "company_id", "created_timestamp", "deleted_timestamp")
   override val nameConverters = Map("At$" -> "_timestamp")
 

core/src/test/scala/programmerlist/ProgrammerSkill.scala

@@ -6,7 +6,7 @@ case class ProgrammerSkill(programmerId: Long, skillId: Long)
 
 object ProgrammerSkill extends SQLSyntaxSupport[ProgrammerSkill] {
 
-  override val columnNames = Seq("programmer_id", "skill_id")
+  override val columnNames: Seq[String] = Seq("programmer_id", "skill_id")
 
   lazy val ps = ProgrammerSkill.syntax("ps")
 }

core/src/test/scala/programmerlist/Skill.scala

@@ -25,7 +25,8 @@ case class Skill(
 
 object Skill extends SQLSyntaxSupport[Skill] with ShortenedNames {
 
-  override val columnNames = Seq("id", "name", "created_at", "deleted_at")
+  override val columnNames: Seq[String] =
+    Seq("id", "name", "created_at", "deleted_at")
 
   def apply(s: SyntaxProvider[Skill])(rs: WrappedResultSet): Skill =
     apply(s.resultName)(rs)

core/src/test/scala/sample/AsyncLover.scala

@@ -18,7 +18,7 @@ case class AsyncLover(
 
 object AsyncLover extends SQLSyntaxSupport[AsyncLover] {
 
-  override val columns = Seq(
+  override val columns: Seq[String] = Seq(
     "id",
     "name",
     "rating",

core/src/test/scala/unit/DBSettings.scala

@@ -3,6 +3,7 @@ package unit
 import scalikejdbc._
 import async.{ AsyncConnectionPoolSettings, _ }
 import com.dimafeng.testcontainers.{
+  Container,
   ForAllTestContainer,
   MultipleContainers,
   MySQLContainer,
@@ -20,7 +21,7 @@ trait DBSettings extends ForAllTestContainer { self: Suite =>
   protected[this] final val postgres = PostgreSQLContainer(
     DockerImageName.parse("postgres:11.4")
   )
-  override val container = MultipleContainers(mysql, postgres)
+  override val container: Container = MultipleContainers(mysql, postgres)
 
   protected[this] final def mysqlJdbcUrl = mysql.jdbcUrl
   protected[this] final def postgresJdbcUrl = postgres.jdbcUrl