Consider these two packages:
package foo given StringIntConversion: Conversion[String, Int] = _.toInt
package bar import foo.StringIntConversion val n: Int = "42"
-feature option of the compiler produces a warning in both packages
bar. I would expect a warning in
foo but not in
The compiler also adds:
See the Scala docs for value scala.language.implicitConversions for a discussion. The
scaladoc (API) is silent, but an older documentation page on implicit conversions states:
To turn off the warnings take either of these actions: - Import scala.language.implicitConversions into the scope of the implicit conversion definition - Invoke the compiler with -language:implicitConversions No warning is emitted when the conversion is applied by the compiler.
That doesn’t seem consistent with the observed behavior.