Where can I see the source code of swiftUI?

Question

Can you see more detailed code？

@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, *)
@frozen public struct HStack<Content> : View where Content : View {

    /// Creates a horizontal stack with the given spacing and vertical alignment.
    ///
    /// - Parameters:
    ///   - alignment: The guide for aligning the subviews in this stack. This
    ///     guide has the same vertical screen coordinate for every child view.
    ///   - spacing: The distance between adjacent subviews, or `nil` if you
    ///     want the stack to choose a default distance for each pair of
    ///     subviews.
    ///   - content: A view builder that creates the content of this stack.
    @inlinable public init(alignment: VerticalAlignment = .center, spacing: CGFloat? = nil, @ViewBuilder content: () -> Content)

    /// The type of view representing the body of this view.
    ///
    /// When you create a custom view, Swift infers this type from your
    /// implementation of the required `body` property.
    public typealias Body = Never
}

Answer 1

SwiftUI isn't included in the Open Source Swift Project, but There Is an undergoing project to build an Open Source implementation of Apple's SwiftUI DSL. https://github.com/Cosmo/OpenSwiftUI