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Pattern matching DSL #3442

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merged 5 commits into from
May 29, 2024
Merged

Pattern matching DSL #3442

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176d13e
Pattern matching DSL
serras May 27, 2024
9835d6f
Tests
serras May 27, 2024
ac5c7db
More ways to `match`
serras May 28, 2024
bc0754a
Improved matcher naming
serras May 28, 2024
c7d7328
Added SingletonRaise version
serras May 29, 2024
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17 changes: 17 additions & 0 deletions arrow-libs/optics/arrow-optics/api/arrow-optics.api
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Original file line number Diff line number Diff line change
Expand Up @@ -521,6 +521,23 @@ public final class arrow/optics/dsl/OptionKt {
public static final fun getSome (Larrow/optics/PTraversal;)Larrow/optics/PTraversal;
}

public final class arrow/optics/match/MatchKt {
public static final fun equalsTo (Ljava/lang/Object;)Larrow/optics/POptional;
public static final fun ifEquals (Larrow/optics/POptional;Ljava/lang/Object;)Larrow/optics/POptional;
public static final fun invoke (Larrow/optics/POptional;Larrow/optics/POptional;)Larrow/optics/POptional;
public static final fun invoke (Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;)Larrow/optics/POptional;
public static final fun invoke (Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;)Larrow/optics/POptional;
public static final fun invoke (Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;Larrow/optics/POptional;)Larrow/optics/POptional;
public static final fun match (Ljava/lang/Object;Lkotlin/jvm/functions/Function1;)Ljava/lang/Object;
public static final fun predicate (Lkotlin/jvm/functions/Function1;)Larrow/optics/POptional;
public static final fun suchThat (Larrow/optics/POptional;Lkotlin/jvm/functions/Function1;)Larrow/optics/POptional;
}

public abstract interface class arrow/optics/match/MatchScope {
public abstract fun default (Lkotlin/jvm/functions/Function0;)V
public abstract fun then (Larrow/optics/POptional;Lkotlin/jvm/functions/Function1;)V
}

public abstract interface class arrow/optics/typeclasses/At {
public static final field Companion Larrow/optics/typeclasses/At$Companion;
public abstract fun at (Larrow/optics/PLens;Ljava/lang/Object;)Larrow/optics/PLens;
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13 changes: 13 additions & 0 deletions arrow-libs/optics/arrow-optics/api/arrow-optics.klib.api
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Expand Up @@ -236,29 +236,40 @@ abstract interface <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotli
open fun set(#A, #D): #B // arrow.optics/PTraversal.set|set(1:0;1:3){}[0]
open fun size(#A): kotlin/Int // arrow.optics/PTraversal.size|size(1:0){}[0]
}
abstract interface <#A: kotlin/Any?, #B: kotlin/Any?> arrow.optics.match/MatchScope { // arrow.optics.match/MatchScope|null[0]
abstract fun <#A1: kotlin/Any?> (arrow.optics/POptional<#A, #A, #A1, #A1>).then(kotlin/Function1<#A1, #B>) // arrow.optics.match/MatchScope.then|[email protected]<1:0,1:0,0:0,0:0>(kotlin.Function1<0:0,1:1>){0§<kotlin.Any?>}[0]
abstract fun default(kotlin/Function0<#B>) // arrow.optics.match/MatchScope.default|default(kotlin.Function0<1:1>){}[0]
}
abstract interface <#A: kotlin/Any?> arrow.optics/Copy { // arrow.optics/Copy|null[0]
abstract fun <#A1: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #A1, #A1>).set(#A1) // arrow.optics/Copy.set|[email protected]<1:0,1:0,0:0,0:0>(0:0){0§<kotlin.Any?>}[0]
abstract fun <#A1: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #A1, #A1>).transform(kotlin/Function1<#A1, #A1>) // arrow.optics/Copy.transform|[email protected]<1:0,1:0,0:0,0:0>(kotlin.Function1<0:0,0:0>){0§<kotlin.Any?>}[0]
open fun <#A1: kotlin/Any?> inside(arrow.optics/PTraversal<#A, #A, #A1, #A1>, kotlin/Function1<arrow.optics/Copy<#A1>, kotlin/Unit>) // arrow.optics/Copy.inside|inside(arrow.optics.PTraversal<1:0,1:0,0:0,0:0>;kotlin.Function1<arrow.optics.Copy<0:0>,kotlin.Unit>){0§<kotlin.Any?>}[0]
}
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?, #E: kotlin/Any?, #F: kotlin/Any?> (arrow.optics/PLens<#A, #B, #C?, #D?>).arrow.optics/composeNull(arrow.optics/PLens<#C, #D, #E, #F>): arrow.optics/PLens<#A, #B, #E?, #F?> // arrow.optics/composeNull|[email protected]<0:0,0:1,0:2?,0:3?>(arrow.optics.PLens<0:2,0:3,0:4,0:5>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>;4§<kotlin.Any?>;5§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?, #E: kotlin/Any?, #F: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/invoke(arrow.optics/POptional<#B, #B, #C, #C>, arrow.optics/POptional<#B, #B, #D, #D>, arrow.optics/POptional<#B, #B, #E, #E>, arrow.optics/POptional<#B, #B, #F, #F>): arrow.optics/POptional<#A, #A, arrow.core/Tuple4<#C, #D, #E, #F>, arrow.core/Tuple4<#C, #D, #E, #F>> // arrow.optics.match/invoke|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.POptional<0:1,0:1,0:2,0:2>;arrow.optics.POptional<0:1,0:1,0:3,0:3>;arrow.optics.POptional<0:1,0:1,0:4,0:4>;arrow.optics.POptional<0:1,0:1,0:5,0:5>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>;4§<kotlin.Any?>;5§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?, #E: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/invoke(arrow.optics/POptional<#B, #B, #C, #C>, arrow.optics/POptional<#B, #B, #D, #D>, arrow.optics/POptional<#B, #B, #E, #E>): arrow.optics/POptional<#A, #A, kotlin/Triple<#C, #D, #E>, kotlin/Triple<#C, #D, #E>> // arrow.optics.match/invoke|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.POptional<0:1,0:1,0:2,0:2>;arrow.optics.POptional<0:1,0:1,0:3,0:3>;arrow.optics.POptional<0:1,0:1,0:4,0:4>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>;4§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/PLens<#A, #A, #B, #B>).arrow.optics.dsl/at(arrow.optics.typeclasses/At<#B, #C, #D>, #C): arrow.optics/PLens<#A, #A, #D, #D> // arrow.optics.dsl/at|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.At<0:1,0:2,0:3>;0:2){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.dsl/at(arrow.optics.typeclasses/At<#B, #C, #D>, #C): arrow.optics/POptional<#A, #A, #D, #D> // arrow.optics.dsl/at|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.At<0:1,0:2,0:3>;0:2){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.dsl/index(arrow.optics.typeclasses/Index<#B, #C, #D>, #C): arrow.optics/POptional<#A, #A, #D, #D> // arrow.optics.dsl/index|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.Index<0:1,0:2,0:3>;0:2){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/invoke(arrow.optics/POptional<#B, #B, #C, #C>, arrow.optics/POptional<#B, #B, #D, #D>): arrow.optics/POptional<#A, #A, kotlin/Pair<#C, #D>, kotlin/Pair<#C, #D>> // arrow.optics.match/invoke|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.POptional<0:1,0:1,0:2,0:2>;arrow.optics.POptional<0:1,0:1,0:3,0:3>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #B, #B>).arrow.optics.dsl/at(arrow.optics.typeclasses/At<#B, #C, #D>, #C): arrow.optics/PTraversal<#A, #A, #D, #D> // arrow.optics.dsl/at|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.At<0:1,0:2,0:3>;0:2){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #B, #B>).arrow.optics.dsl/filter(arrow.optics.typeclasses/FilterIndex<#B, #C, #D>, kotlin/Function1<#C, kotlin/Boolean>): arrow.optics/PTraversal<#A, #A, #D, #D> // arrow.optics.dsl/filter|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.FilterIndex<0:1,0:2,0:3>;kotlin.Function1<0:2,kotlin.Boolean>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #B, #B>).arrow.optics.dsl/index(arrow.optics.typeclasses/Index<#B, #C, #D>, #C): arrow.optics/PTraversal<#A, #A, #D, #D> // arrow.optics.dsl/index|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.typeclasses.Index<0:1,0:2,0:3>;0:2){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics.typeclasses/At<#A, #B, arrow.core/Option<#C>>).arrow.optics.typeclasses/remove(#A, #B): #A // arrow.optics.typeclasses/remove|[email protected]<0:0,0:1,arrow.core.Option<0:2>>(0:0;0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics.typeclasses/At<#A, #B, arrow.core/Option<#C>>).arrow.optics.typeclasses/remove(#B): kotlin/Function1<#A, #A> // arrow.optics.typeclasses/remove|[email protected]<0:0,0:1,arrow.core.Option<0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/PLens<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/at(#B): arrow.optics/PLens<#A, #A, arrow.core/Option<#C>, arrow.core/Option<#C>> // arrow.optics.dsl/at|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/invoke(arrow.optics/POptional<#B, #B, #C, #C>): arrow.optics/POptional<#A, #A, #C, #C> // arrow.optics.match/invoke|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.POptional<0:1,0:1,0:2,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/POptional<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/at(#B): arrow.optics/POptional<#A, #A, arrow.core/Option<#C>, arrow.core/Option<#C>> // arrow.optics.dsl/at|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/POptional<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/index(#B): arrow.optics/POptional<#A, #A, #C, #C> // arrow.optics.dsl/index|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, #B, #B>).arrow.optics.dsl/every(arrow.optics/PTraversal<#B, #B, #C, #C>): arrow.optics/PTraversal<#A, #A, #C, #C> // arrow.optics.dsl/every|[email protected]<0:0,0:0,0:1,0:1>(arrow.optics.PTraversal<0:1,0:1,0:2,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/at(#B): arrow.optics/PTraversal<#A, #A, arrow.core/Option<#C>, arrow.core/Option<#C>> // arrow.optics.dsl/at|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/filter(kotlin/Function1<#B, kotlin/Boolean>): arrow.optics/PTraversal<#A, #A, #C, #C> // arrow.optics.dsl/filter|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(kotlin.Function1<0:1,kotlin.Boolean>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, kotlin.collections/Map<#B, #C>, kotlin.collections/Map<#B, #C>>).arrow.optics.dsl/index(#B): arrow.optics/PTraversal<#A, #A, #C, #C> // arrow.optics.dsl/index|[email protected]<0:0,0:0,kotlin.collections.Map<0:1,0:2>,kotlin.collections.Map<0:1,0:2>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (#A).arrow.optics.match/match(kotlin/Function1<arrow.optics.match/MatchScope<#A, #B>, kotlin/Unit>): #B // arrow.optics.match/match|match@0:0(kotlin.Function1<arrow.optics.match.MatchScope<0:0,0:1>,kotlin.Unit>){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/PLens<#A, #A, kotlin.collections/Set<#B>, kotlin.collections/Set<#B>>).arrow.optics.dsl/at(#B): arrow.optics/PLens<#A, #A, kotlin/Boolean, kotlin/Boolean> // arrow.optics.dsl/at|[email protected]<0:0,0:0,kotlin.collections.Set<0:1>,kotlin.collections.Set<0:1>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/PLens<#B, #B, kotlin.collections/List<#A>, kotlin.collections/List<#A>>).arrow.optics/get(kotlin/Int): arrow.optics/POptional<#B, #B, #A, #A> // arrow.optics/get|[email protected]<0:1,0:1,kotlin.collections.List<0:0>,kotlin.collections.List<0:0>>(kotlin.Int){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/ifEquals(#B): arrow.optics/POptional<#A, #A, #B, #B> // arrow.optics.match/ifEquals|[email protected]<0:0,0:0,0:1,0:1>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/POptional<#A, #A, #B, #B>).arrow.optics.match/suchThat(kotlin/Function1<#B, kotlin/Boolean>): arrow.optics/POptional<#A, #A, #B, #B> // arrow.optics.match/suchThat|[email protected]<0:0,0:0,0:1,0:1>(kotlin.Function1<0:1,kotlin.Boolean>){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/POptional<#A, #A, arrow.core/NonEmptyList<#B>, arrow.core/NonEmptyList<#B>>).arrow.optics.dsl/index(kotlin/Int): arrow.optics/POptional<#A, #A, #B, #B> // arrow.optics.dsl/index|[email protected]<0:0,0:0,arrow.core.NonEmptyList<0:1>,arrow.core.NonEmptyList<0:1>>(kotlin.Int){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/POptional<#A, #A, kotlin.collections/List<#B>, kotlin.collections/List<#B>>).arrow.optics.dsl/index(kotlin/Int): arrow.optics/POptional<#A, #A, #B, #B> // arrow.optics.dsl/index|[email protected]<0:0,0:0,kotlin.collections.List<0:1>,kotlin.collections.List<0:1>>(kotlin.Int){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?, #B: kotlin/Any?> (arrow.optics/POptional<#A, #A, kotlin.collections/Set<#B>, kotlin.collections/Set<#B>>).arrow.optics.dsl/at(#B): arrow.optics/POptional<#A, #A, kotlin/Boolean, kotlin/Boolean> // arrow.optics.dsl/at|[email protected]<0:0,0:0,kotlin.collections.Set<0:1>,kotlin.collections.Set<0:1>>(0:1){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
Expand All @@ -280,6 +291,8 @@ final fun <#A: kotlin/Any?> (arrow.optics/PTraversal<#A, #A, kotlin/String, kotl
final fun <#A: kotlin/Any?> (kotlin.collections/List<#A>).arrow.optics/snoc(#A): kotlin.collections/List<#A> // arrow.optics/snoc|[email protected]<0:0>(0:0){0§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?> (kotlin.collections/List<#A>).arrow.optics/uncons(): kotlin/Pair<#A, kotlin.collections/List<#A>>? // arrow.optics/uncons|[email protected]<0:0>(){0§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?> (kotlin.collections/List<#A>).arrow.optics/unsnoc(): kotlin/Pair<kotlin.collections/List<#A>, #A>? // arrow.optics/unsnoc|[email protected]<0:0>(){0§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?> arrow.optics.match/equalsTo(#A): arrow.optics/POptional<#A, #A, #A, #A> // arrow.optics.match/equalsTo|equalsTo(0:0){0§<kotlin.Any?>}[0]
final fun <#A: kotlin/Any?> arrow.optics.match/predicate(kotlin/Function1<#A, kotlin/Boolean>): arrow.optics/POptional<#A, #A, #A, #A> // arrow.optics.match/predicate|predicate(kotlin.Function1<0:0,kotlin.Boolean>){0§<kotlin.Any?>}[0]
final object arrow.optics/Every { // arrow.optics/Every|null[0]
final fun <#A1: kotlin/Any?, #B1: kotlin/Any?> either(): arrow.optics/PTraversal<arrow.core/Either<#A1, #B1>, arrow.core/Either<#A1, #B1>, #B1, #B1> // arrow.optics/Every.either|either(){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
final fun <#A1: kotlin/Any?, #B1: kotlin/Any?> map(): arrow.optics/PTraversal<kotlin.collections/Map<#A1, #B1>, kotlin.collections/Map<#A1, #B1>, #B1, #B1> // arrow.optics/Every.map|map(){0§<kotlin.Any?>;1§<kotlin.Any?>}[0]
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93 changes: 93 additions & 0 deletions arrow-libs/optics/arrow-optics/src/commonMain/kotlin/arrow/optics/match/Match.kt
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package arrow.optics.match

import arrow.core.Tuple4
import arrow.core.raise.either
import arrow.core.raise.ensure
import arrow.optics.Optional

public interface MatchScope<S, R> {
public infix fun <A> Optional<S, A>.then(next: (A) -> R)
public fun default(next: () -> R)
}

private class MatchFound(val result: Any?) : Throwable()

@Suppress("UNCHECKED_CAST")
public fun <S, R> S.match(cases: MatchScope<S, R>.() -> Unit): R {
val subject = this
val scope = object : MatchScope<S, R> {
override fun <A> Optional<S, A>.then(next: (A) -> R) {
this.getOrNull(subject)?.let { throw MatchFound(next(it)) }
}
override fun default(next: () -> R) {
throw MatchFound(next())
}
}
try {
cases(scope)
throw IllegalArgumentException("no match found")
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@nomisRev nomisRev May 28, 2024 •
edited
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Should we force a default lambda, and provide a second function matchOrThrow without the default lambda?

This way it's less likely to forget to catch IllegalArgumentException, and if you have no default you are forced to be more explicit.

} catch (e: MatchFound) {
return e.result as R
}
}

public operator fun <T, S, A> Optional<T, S>.invoke(
p1: Optional<S, A>
): Optional<T, A> = this.compose(p1)

public operator fun <T, S, A, B> Optional<T, S>.invoke(
p1: Optional<S, A>, p2: Optional<S, B>
): Optional<T, Pair<A, B>> = this.compose(combine(p1, p2))

public operator fun <T, S, A, B, C> Optional<T, S>.invoke(
p1: Optional<S, A>, p2: Optional<S, B>, p3: Optional<S, C>
): Optional<T, Triple<A, B, C>> = this.compose(combine(p1, p2, p3))

public operator fun <T, S, A, B, C, D> Optional<T, S>.invoke(
p1: Optional<S, A>, p2: Optional<S, B>, p3: Optional<S, C>, p4: Optional<S, D>
): Optional<T, Tuple4<A, B, C, D>> = this.compose(combine(p1, p2, p3, p4))

public fun <S, A> Optional<S, A>.suchThat(
predicate: (A) -> Boolean
): Optional<S, A> = this.compose(predicate(predicate))

public fun <A> predicate(
predicate: (A) -> Boolean
): Optional<A, A> = Optional(
getOrModify = { x -> either {
ensure(predicate(x)) { x }
x
} },
set = { x, _ -> x }
)

public fun <S, A> Optional<S, A>.ifEquals(value: A): Optional<S, A> = this.suchThat { it == value }

public fun <A> equalsTo(value: A): Optional<A, A> = predicate { it == value }

private fun <S, A, B> combine(
p1: Optional<S, A>, p2: Optional<S, B>
): Optional<S, Pair<A, B>> = Optional(
getOrModify = { x -> either {
Pair(p1.getOrModify(x).bind(), p2.getOrModify(x).bind())
} },
set = { x, (a, b) -> p2.set(p1.set(x, a), b) }
)

private fun <S, A, B, C> combine(
p1: Optional<S, A>, p2: Optional<S, B>, p3: Optional<S, C>
): Optional<S, Triple<A, B, C>> = Optional(
getOrModify = { x -> either {
Triple(p1.getOrModify(x).bind(), p2.getOrModify(x).bind(), p3.getOrModify(x).bind())
} },
set = { x, (a, b, c) -> p3.set(p2.set(p1.set(x, a), b), c) }
)

private fun <S, A, B, C, D> combine(
p1: Optional<S, A>, p2: Optional<S, B>, p3: Optional<S, C>, p4: Optional<S, D>
): Optional<S, Tuple4<A, B, C, D>> = Optional(
getOrModify = { x -> either {
Tuple4(p1.getOrModify(x).bind(), p2.getOrModify(x).bind(), p3.getOrModify(x).bind(), p4.getOrModify(x).bind())
} },
set = { x, (a, b, c, d) -> p4.set(p3.set(p2.set(p1.set(x, a), b), c), d) }
)
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