Scala 2.13.4: Auto-application to () is deprecated. (scalikejdbc-mapper-generator)

[SeanDaru]

[Environment]

• Scala

scalaVersion := "2.13.4"

• scalikejdbc-mapper-generator

addSbtPlugin("org.scalikejdbc" %% "scalikejdbc-mapper-generator" % "3.5.0")

• sample table

# mysql 8
CREATE TABLE humans
(
    id   BIGINT UNSIGNED AUTO_INCREMENT,
    name text,
    PRIMARY KEY (id)
);

---

I executed the below sbt task.

scalikejdbcGen humans Human
compile

Then, Scala compiler output the below warnings.

[warn] /.../Human.scala:35:32: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method single,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.map(Human(h.resultName)).single.apply()
[warn]                                ^
[warn] /.../Human.scala:39:63: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method list,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     withSQL(select.from(Human as h)).map(Human(h.resultName)).list.apply()
[warn]                                                               ^
[warn] /.../Human.scala:43:72: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method single,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     withSQL(select(sqls.count).from(Human as h)).map(rs => rs.long(1)).single.apply().get
[warn]                                                                        ^
[warn] /.../Human.scala:49:32: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method single,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.map(Human(h.resultName)).single.apply()
[warn]                                ^
[warn] /.../Human.scala:55:32: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method list,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.map(Human(h.resultName)).list.apply()
[warn]                                ^
[warn] /.../Human.scala:61:22: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method single,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.map(_.long(1)).single.apply().get
[warn]                      ^
[warn] /.../Human.scala:70:7: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method updateAndReturnGeneratedKey,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.updateAndReturnGeneratedKey.apply()
[warn]       ^
[warn] /.../Human.scala:94:7: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method update,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     }.update.apply()
[warn]       ^
[warn] /.../Human.scala:99:67: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method update,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     withSQL { delete.from(Human).where.eq(column.id, entity.id) }.update.apply()
[warn]                                                                   ^

*I masked source path.

---

I think maybe that this source should be fixed.

https://github.com/scalikejdbc/scalikejdbc/blob/master/scalikejdbc-mapper-generator-core/src/main/scala/scalikejdbc/mapper/CodeGenerator.scala

[SeanDaru]

I'm sorry...
This is duplicated with #1093 .

Please close.