Cannot invoke 'curry' with an argument list of type '((objectID: NSManagedObjectID?, name: String, employees: Array<StoredEmployee>) -> StoredCompany)

[emarashliev]

We have next two separated files:

//  StoredCompany.swift

import CoreData
import CoreValue


struct StoredCompany: CVManagedPersistentStruct {
    static let EntityName = "Company"
    var objectID: NSManagedObjectID?

    var name: String
    var employees: Array<StoredEmployee>

    static func fromObject(o: NSManagedObject) throws -> StoredCompany {
        return try curry(self.init)
            <^> o <|? "objectID"
            <^> o <| "name"
            <^> o <|| "employees"
    }

    mutating func save(context: NSManagedObjectContext) throws {
        try employees.saveAll(context)

        try defaultSave(context)
    }

//  StoredEmployee.swift

import CoreData
import CoreValue


struct StoredEmployee : CVManagedPersistentStruct {
    static let EntityName = "Employee"
    var objectID: NSManagedObjectID?

    let name: String
    let age: Int16
    let position: String?
    let department: String
    let job: String

    static func fromObject(o: NSManagedObject) throws -> StoredEmployee {
        return try curry(self.init)
            <^> o <|? "objectID"
            <^> o <| "name"
            <^> o <| "age"
            <^> o <|? "position"
            <^> o <| "department"
            <^> o <| "job"
    }
}

The compiler throws next error .../StoredCompany.swift:21:20: Cannot invoke 'curry' with an argument list of type '((objectID: NSManagedObjectID?, name: String, employees: Array<StoredEmployee>) -> StoredCompany)'

It's happens only when struct StoredEmployee and struct StoredCompany are in separated files. Probably that's the reason that the tests doesn't catch it.

Cheers! 🍻

[brow]

Does your project have multiple targets? Is it possible that you did not add both files to all appropriate targets when you separated them?

[terhechte]

Does this still happen? If yes, can you try with the current Swift 3 release (CoreValue 0.2)?

[tkohout]

Though not sure why it was happening, adding:

typealias StructureType = StoredEmployee

usually solved the problem for me.

[leandromperez]

I bumped into the same issue. this solved it too:

typealias StructureType = MyStructureType

btw, is this project alive?