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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2021-2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
//
//===----------------------------------------------------------------------===//
struct NaiveParticipant: Participant {
static var name: String { "Naive" }
static func graphemeBreakProperty() throws -> (String) -> GraphemeBreakEntry? {
graphemeBreakPropertyData(forLine:)
}
}
private func graphemeBreakPropertyData(
forLine line: String
) -> GraphemeBreakEntry? {
let components = line.split(separator: ";")
guard components.count >= 2 else { return nil }
let splitProperty = components[1].split(separator: "#")
let filteredProperty = splitProperty[0].filter { !$0.isWhitespace }
guard let property = Unicode.GraphemeBreakProperty(filteredProperty) else {
return nil
}
let scalars: ClosedRange<Unicode.Scalar>
let filteredScalars = components[0].filter { !$0.isWhitespace }
if filteredScalars.contains(".") {
let range = filteredScalars
.split(separator: ".")
.map { Unicode.Scalar(hex: $0)! }
scalars = range[0] ... range[1]
} else {
let scalar = Unicode.Scalar(hex: filteredScalars)!
scalars = scalar...scalar
}
return GraphemeBreakEntry(scalars, property)
}
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