39 lines
1.3 KiB
Swift
39 lines
1.3 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Hummingbird server framework project
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//
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// Copyright (c) 2021-2021 the Hummingbird authors
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// Licensed under Apache License v2.0
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//
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// See LICENSE.txt for license information
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// See hummingbird/CONTRIBUTORS.txt for the list of Hummingbird authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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//===----------------------------------------------------------------------===//
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import Foundation
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/// Allow object to override standard hummingbird type rendering which uses
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/// `String(describing)`.
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public protocol MustacheCustomRenderable {
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/// Custom rendered version of object
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var renderText: String { get }
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/// Whether the object is a null object. Used when scoping sections
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var isNull: Bool { get }
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}
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extension MustacheCustomRenderable {
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/// default version returning the standard rendering
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var renderText: String { String(describing: self) }
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/// default version returning false
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var isNull: Bool { false }
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}
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/// Extend NSNull to conform to `MustacheCustomRenderable` to avoid outputting `<null>` and returning
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/// a valid response for `isNull`
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extension NSNull: MustacheCustomRenderable {
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public var renderText: String { "" }
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public var isNull: Bool { true }
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}
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