E

Swift… but only enums!

About Swift Enumerations

Variables

Basic String Example

let text: Variable = .string("Hello, World!")

Basic Dictionary Example

let dictionary: Variable = .dictionary(
    [
        .bool(false): .double(3.14)
    ]
)

Array Example

let list: Variable = .array(
    [
        .bool(false),
        .string("False"),
        .dictionary(
            [
                .bool(false): .double(3.14)
            ]
        ),
        .int(27)
    ]
)

Getting Values Example

if case .string(let value) = text {
    print("String: \(value)")
}

if case .array(let value) = list,
   let lastValue = value.last,
   case .int(let number) = lastValue {
    print(number * 99)
}

Functions

Void Function Example

let voidExample = Function.void {
    print("Print Lorem ipsum")
}
// ...
voidExample()

In Function Example

let printString = Function.in { stringValue in
    guard case .string(let value) = stringValue else {
        return
    }

    print(value)
}
// ...
printString(.string("Hello, World..."))

In & Out Function Example

let double = Function.inout { value in
    if case .int(let value) = value {
        return .int(value * 2)
    } else if case .float(let value) = value {
        return .float(value * 2)
    } else if case .double(let value) = value {
        return .double(value * 2)
    } else if case .string(let value) = value {
        return .string("\(value)\(value)")
    }

    return .array([value, value])
}
// ...
print("Double of \(Variable.float(3.14)) is \(double(.float(3.14)))")

Projects using E.num

• ⛓ Chain
• 🔭 Observation