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[SR-8210] Value of type does not conform to expected element type #50742

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swift-ci opened this issue Jul 9, 2018 · 1 comment
Closed

[SR-8210] Value of type does not conform to expected element type #50742

swift-ci opened this issue Jul 9, 2018 · 1 comment
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis

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@swift-ci
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swift-ci commented Jul 9, 2018

Previous ID SR-8210
Radar None
Original Reporter trololo (JIRA User)
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, TypeChecker
Assignee None
Priority Medium

md5: c6953788307f0e67cd5c68f99057f75e

Issue Description:

protocol ModuleConfigurator { }
protocol ModuleProperties { }
final class BackupCardProperties { }
extension BackupCardProperties: ModuleProperties { }
 
class Configurator<T> where T: ModuleProperties {
 
    // MARK: - Properties
 
    var properties: T
 
    // MARK: - Initialization
 
    init(properties: T) {
        self.properties = properties
    }
 }
extension Configurator: ModuleConfigurator where T == BackupCardProperties { }
var list: [ModuleConfigurator] = [Configurator(properties: BackupCardProperties())]

Compilation error:

Value of type 'Configurator<BackupCardProperties>' does not conform to expected element type 'ModuleConfigurator'

It works if I use

class Configurator<T> where T: ModuleProperties { }
var list: [ModuleConfigurator] = [Configurator<BackupCardProperties>()]

or

class Configurator<T> where T: ModuleProperties {
 
    // MARK: - Properties
 
    var properties: T
 
    // MARK: - Initialization
 
    init(properties: T) {
        self.properties = properties
    }
 }
 
var list: [ModuleConfigurator] = [Configurator<BackupCardProperties>(properties: BackupCardProperties())]
@belkadan
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belkadan commented Jul 9, 2018

Seems to be fixed in Swift 4.2!

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis
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@belkadan @swift-ci