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Add an infix shorthand for Tuple.Concat
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Addressing #19175
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EugeneFlesselle committed Nov 7, 2024
1 parent 74349e8 commit 4e47edf
Showing 1 changed file with 5 additions and 2 deletions.
7 changes: 5 additions & 2 deletions library/src/scala/Tuple.scala
Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,8 @@ sealed trait Tuple extends Product {
/** Return a new tuple by concatenating `this` tuple with `that` tuple.
* This operation is O(this.size + that.size)
*/
inline def ++ [This >: this.type <: Tuple](that: Tuple): Concat[This, that.type] =
runtime.Tuples.concat(this, that).asInstanceOf[Concat[This, that.type]]
inline def ++ [This >: this.type <: Tuple](that: Tuple): This ++ that.type =
runtime.Tuples.concat(this, that).asInstanceOf[This ++ that.type]

/** Return the size (or arity) of the tuple */
inline def size[This >: this.type <: Tuple]: Size[This] =
Expand Down Expand Up @@ -126,6 +126,9 @@ object Tuple {
case x1 *: xs1 => x1 *: Concat[xs1, Y]
}

/** An infix shorthand for `Concat[X, Y]` */
infix type ++[X <: Tuple, +Y <: Tuple] = Concat[X, Y]

/** Type of the element at position N in the tuple X */
type Elem[X <: Tuple, N <: Int] = X match {
case x *: xs =>
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