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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| // | ||
| // DistributionItemsBuilder.swift | ||
| // Relativity | ||
| // | ||
| // Created by Dan Federman on 3/19/24. | ||
| // Copyright © 2024 Dan Federman. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
|
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| import UIKit | ||
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| @resultBuilder | ||
| public struct DistributionItemsBuilder { | ||
|
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| // Build expressions, which are turned into partial results. | ||
|
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| public static func buildExpression(_ component: DistributionItem) -> [DistributionItem] { | ||
| [component] | ||
| } | ||
| public static func buildExpression(_ component: UIView) -> [DistributionItem] { | ||
| [.view(component)] | ||
| } | ||
| public static func buildExpression(_ component: CGFloatConvertible) -> [DistributionItem] { | ||
| [.fixed(component.asCGFloat)] | ||
| } | ||
| public static func buildExpression(_ component: [DistributionItem?]) -> [DistributionItem] { | ||
| component.compactMap { $0 } | ||
| } | ||
| public static func buildExpression(_ component: [DistributionItem]) -> [DistributionItem] { | ||
| component | ||
| } | ||
| public static func buildExpression(_ component: DistributionItem?) -> [DistributionItem] { | ||
| [component].compactMap { $0 } | ||
| } | ||
|
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| // Build partial results, which accumulate. | ||
|
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| public static func buildPartialBlock(first: DistributionItem) -> [DistributionItem] { | ||
| [first] | ||
| } | ||
| public static func buildPartialBlock(first: [DistributionItem]) -> [DistributionItem] { | ||
| first | ||
| } | ||
| public static func buildPartialBlock(accumulated: DistributionItem, next: DistributionItem) -> [DistributionItem] { | ||
| [accumulated, next] | ||
| } | ||
| public static func buildPartialBlock(accumulated: DistributionItem, next: [DistributionItem]) -> [DistributionItem] { | ||
| [accumulated] + next | ||
| } | ||
| public static func buildPartialBlock(accumulated: [DistributionItem], next: DistributionItem) -> [DistributionItem] { | ||
| accumulated + [next] | ||
| } | ||
| public static func buildPartialBlock(accumulated: [DistributionItem], next: [DistributionItem]) -> [DistributionItem] { | ||
| accumulated + next | ||
| } | ||
|
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| // Build if statements | ||
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| public static func buildOptional(_ component: [DistributionItem]?) -> [DistributionItem] { | ||
| component ?? [] | ||
| } | ||
| public static func buildOptional(_ component: [DistributionItem]) -> [DistributionItem] { | ||
| component | ||
| } | ||
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| // Build if-else and switch statements | ||
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| public static func buildEither(first component: [DistributionItem]) -> [DistributionItem] { | ||
| component | ||
| } | ||
| public static func buildEither(second component: [DistributionItem]) -> [DistributionItem] { | ||
| component | ||
| } | ||
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| // Build the blocks that turn into results. | ||
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| public static func buildBlock(_ components: [DistributionItem]...) -> [DistributionItem] { | ||
| components.flatMap { $0 } | ||
| } | ||
| } |
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