JarCasting
tuplez
Tuple composition in Scala and Scala.js.
// tupleN + scalar, scalar + tupleN, tupleN + tupleM, up to Tuple22
"app.tulz" %%% "tuplez-full" % "0.3.6"
// or
// tupleN + scalar, scalar + tupleN, tupleN + tupleM, up to Tuple10
"app.tulz" %%% "tuplez-full-light" % "0.3.6"
// or
// tupleN + scalar, up to Tuple22
"app.tulz" %%% "tuplez-basic" % "0.3.6"
// or
// tupleN + scalar, up to Tuple10
"app.tulz" %%% "tuplez-basic-light" % "0.3.6"
// utilities to build API's that allow using a FunctionN[A, B, C, ... Out] instead of Function1[TupleN[A, B, C, ...], Out]
"app.tulz" %%% "tuplez-apply" % "0.3.6"
Published for Scala 2.12, 2.13 and 3.0.0-RC2, JVM and Scala.js 1.5.1+.
Source code
Source code is 100% generated.
Composition
app.tulz.tuplez.TupleComposition
abstract class Composition[-A, -B] {
type Composed
val apply: (A, B) => Composed
}
Implicit values are provided for composing tuples with tuples, and tuples with scalars (both prepending and appending).
Implicits are defined by the generated code.
The companion object provides a single utility function to compose two tuples (or a tuple and a scalar)
object TupleComposition {
def compose[L, R](l: L, r: R)(implicit composition: Composition[L, R]): composition.Composed = composition.compose(l, r)
}
Examples:
import app.tulz.tuplez.TupleComposition
TupleComposition.compose( Tuple1(1), Tuple1(2) ) // (1, 2)
TupleComposition.compose( 1, 2 ) // (1, 2)
TupleComposition.compose( (1, 2, 3, 4), (5, 6) ) // (1, 2, 3, 4, 5, 6)
TupleComposition.compose( (1, 2, 3), 4 ) // (1, 2, 3, 4)
TupleComposition.compose( 1, (2, 3, 4) ) // (1, 2, 3, 4)
TupleComposition.compose( (1, 2, 3), Tuple1(4) ) // (1, 2, 3, 4)
TupleComposition.compose( Tuple1(1), (2, 3, 4) ) // (1, 2, 3, 4)
TupleComposition.compose( (1, 2, 3), () ) // (1, 2, 3)
TupleComposition.compose( (), (1, 2, 3) ) // (1, 2, 3)
// etc
Apply converters
app.tulz.tuplez.ApplyConverter
Utilities for converting FunctionN[..., Out] into Function1[TupleN[...], Out]
Example:
import app.tulz.tuplez._
object instances extends ApplyConverters[String]
// in order to make type and implicits resolution possible, the apply converters are generated for a fixed output type
import instances._
val acceptingTupledFunc: ((Int, Int, Int, Int) => String) => String = func => func((1, 2, 3, 4))
val nonTupledFunction = (x1: Int, x2: Int, x3: Int, x4: Int) => s"I return [${x1}, ${x2}, ${x3}, ${x4}]"
assert(acceptingTupledFunc(toTupled4(nonTupledFunction)) == "I return [1, 2, 3, 4]")
Intended usage
Simple example:
import app.tulz.tuplez._
case class MyStructure[T](
data: T
) {
def appendScalar[U](value: U)(implicit composition: Composition[T, U]): MyStructure[composition.Composed] =
copy(data = composition.compose(data, value))
// or
// copy(data = TupleComposition.compose(data, value))
}
A more complete example: https://github.com/tulz-app/frontroute/blob/main/src/main/scala/io/frontroute/DirectiveApplyConverters.scala
Author
Iurii Malchenko – @yurique / keybase.io/yurique
License
tuplez is provided under the MIT license.
