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Add regression test for #20288 fixed in #20527 #20857

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Merged
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Jul 1, 2024
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Add regression test for #20288 fixed in #20527 #20857

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23 changes: 23 additions & 0 deletions tests/pos/i20288.scala
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Original file line number Diff line number Diff line change
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trait Decoder[A]
object Decoder {
given Decoder[DataRow] = ???
extension [A <: Tuple](d: Decoder[A])
def ~[B](fd: Field[B]): Decoder[Tuple.Concat[A, Tuple1[B]]] = ???
}

trait Field[A]
object Field:
val int: Field[Int] = ???
extension [A](self: Field[A])
def ~[B](that: Field[B])(using Decoder[DataRow]): Decoder[(A, B)] = ???

trait DataRow
def simpleQuery[S, A](query: String)(using Decoder[A]): Either[Throwable, A] = ???

@main def Test = {
import Decoder.*
val fails = simpleQuery("")(using
Field.int ~ Field.int ~ Field.int
)
}