-
Book Overview & Buying
-
Table Of Contents
Mastering Swift 6 - Seventh Edition
By :
Result builders allow developers to create custom DSLs for constructing complex data structures, such as JSON, SwiftUI views, or HTML elements for server-side Swift frameworks. They help us write code that is more expressive and concise, making it easier to understand and maintain.
To get a better understanding of what result builders can do, let’s look at a real basic example, one that will combine multiple strings:
@resultBuilder
struct StringBuilder {
static func buildBlock(_ components: String...) -> String {
return components.joined()
}
}
func buildString(@StringBuilder _ components: () -> String) -> String {
return components()
}
In this example, we use the @resultBuilder attribute to define a custom result builder. In this case, it’s applied to the StringBuilder structure, indicating that this structure is intended to be used as a result builder.
Within the StringBuilder structure, we define the static...