62 lines
1.2 KiB
Swift
62 lines
1.2 KiB
Swift
public protocol NodeRepresentable {
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func render() -> String
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}
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public protocol TextNode: NodeRepresentable {
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// swiftlint:disable type_name
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associatedtype _Body: TextNode
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typealias Body = _Body
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// swiftlint:enable type_name
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var body: Body { get }
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}
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public extension TextNode {
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func render() -> String {
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body.render()
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}
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}
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extension String: NodeRepresentable {
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public func render() -> String {
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self
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}
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}
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extension String: TextNode {
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public var body: some TextNode {
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self
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}
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}
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public struct AnyTextNode: TextNode {
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let makeString: () -> String
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public init<N: TextNode>(_ node: N) {
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self.makeString = node.render
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}
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public var body: some TextNode { makeString() }
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}
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public extension TextNode {
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func eraseToAnyTextNode() -> AnyTextNode {
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AnyTextNode(self)
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}
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}
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extension Optional: TextNode where Wrapped: TextNode {
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public var body: some TextNode {
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guard let node = self else { return "".eraseToAnyTextNode() }
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return node.eraseToAnyTextNode()
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}
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}
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extension Optional: NodeRepresentable where Wrapped: NodeRepresentable {
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public func render() -> String {
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guard let node = self else { return "" }
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return node.render()
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}
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}
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