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// RUN: %target-typecheck-verify-swift
// RUN: %target-swift-frontend -debug-generic-signatures -emit-ir %s 2>&1 | %FileCheck %s
// https://github.com/apple/swift/issues/55258
public protocol DefaultInitializable {
init()
}
public protocol AdjacencyEdge_ {
associatedtype VertexID: Equatable
associatedtype Properties
var destination: VertexID { get set }
var properties: Properties { get set }
}
public struct AdjacencyEdge<VertexID: Equatable, Properties>: AdjacencyEdge_ {
public var destination: VertexID
public var properties: Properties
}
public protocol AdjacencyVertex_ {
associatedtype Edges: Collection where Edges.Element: AdjacencyEdge_
associatedtype Properties
var edges: Edges { get set }
var properties: Properties { get set }
}
public struct AdjacencyVertex<Edges: Collection, Properties> : AdjacencyVertex_
where Edges.Element: AdjacencyEdge_
{
public var edges: Edges
public var properties: Properties
}
public protocol BinaryFunction {
associatedtype Parameter0
associatedtype Parameter1
associatedtype Result
func callAsFunction(_: Parameter0, _: Parameter1) -> Result
}
public struct GeneralAdjacencyList<
Spine: Collection, VertexIDToIndex: BinaryFunction
>
where Spine.Element : AdjacencyVertex_,
VertexIDToIndex.Parameter0 == Spine,
VertexIDToIndex.Parameter1 == Spine.Element.Edges.Element.VertexID,
VertexIDToIndex.Result == Spine.Index
{
public let vertexIDToIndex: VertexIDToIndex
public var spine: Spine
}
public struct IdentityVertexIDToIndex<Spine: Collection>: BinaryFunction
where Spine.Element : AdjacencyVertex_,
Spine.Element.Edges.Element.VertexID == Spine.Index
{
public func callAsFunction(_: Spine, _ id: Spine.Index) -> Spine.Index {
return id
}
}
public extension GeneralAdjacencyList {
typealias VertexID = VertexIDToIndex.Parameter1
typealias VertexProperties = Spine.Element.Properties
typealias EdgeProperties = Spine.Element.Edges.Element.Properties
struct EdgeID: Equatable {
/// The source vertex.
let source: VertexIDToIndex.Parameter1
/// The position of the edge in `source`'s list of edges.
let targetIndex: Spine.Index
}
}
// CHECK-LABEL: Generic signature: <Spine, VertexIDToIndex where Spine : RangeReplaceableCollection, VertexIDToIndex == IdentityVertexIDToIndex<Spine>, Spine.[Sequence]Element : AdjacencyVertex_, Spine.[Collection]Index == Spine.[Sequence]Element.[AdjacencyVertex_]Edges.[Sequence]Element.[AdjacencyEdge_]VertexID, Spine.[Sequence]Element.[AdjacencyVertex_]Edges : BidirectionalCollection, Spine.[Sequence]Element.[AdjacencyVertex_]Edges : RangeReplaceableCollection>
public extension GeneralAdjacencyList
where VertexIDToIndex == IdentityVertexIDToIndex<Spine>,
Spine: RangeReplaceableCollection,
Spine.Element.Edges: RangeReplaceableCollection
& BidirectionalCollection // Because https://github.com/apple/swift/issues/55257
{
func addVertex(storing properties: VertexProperties) -> VertexID {
return spine.indices.first!
}
}
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