Sajjon · September 4, 2018 09:31
diff --git a/ValidIdentifierHeadsInSwift.swift b/ValidIdentifierHeadsInSwift.swift
 import UIKit
 import Foundation

 // Written in Swift 4.2, Xcode 10 beta 6
 // Valid Identifier Heads found at: https://docs.swift.org/swift-book/ReferenceManual/LexicalStructure.html
 // Code inspired by Nate Cooks gist: https://gist.github.com/natecook1000/c5fb2b8cd0967f53770e


 extension UnicodeScalar : Strideable {

    public func distance(to other: UnicodeScalar) -> Int {
        return Int(other.value) - Int(self.value)
    }

    /// Returns a UnicodeScalar where the value is advanced by n.
    ///
    /// - precondition: self.value + n represents a valid unicode scalar.
    ///
    public func advanced(by n: Int) -> UnicodeScalar {
        let advancedValue = n + Int(self.value)
        guard let advancedScalar = UnicodeScalar(advancedValue) else {
            fatalError("\(String(advancedValue, radix: 16)) does not represent a valid unicode scalar value.")
        }
        return advancedScalar
    }
 }



 var identifierHeads: [UnicodeScalar] = ["\u{00A8}","\u{00AA}","\u{00AD}","\u{00AF}","\u{2054}"]
 identifierHeads += Array("\u{00B2}" ... "\u{00B5}")
 identifierHeads += Array("\u{00B7}" ... "\u{00BA}")
 identifierHeads += Array("\u{00BC}" ... "\u{00BE}")

 // MARK: - LATIN,GREEK
 //identifierHeads += Array("\u{00C0}" ... "\u{00D6}")
 //identifierHeads += Array("\u{00D8}" ... "\u{00F6}")
 //identifierHeads += Array("\u{00F8}" ... "\u{00FF}")
 //identifierHeads += Array("\u{1E00}" ... "\u{1FFF}")

 // MARK: - LATIN (again), "MODIFIER"
 // identifierHeads += Array("\u{0100}" ... "\u{02FF}")

 // MARK: - Some Greek, CYRILLIC, ARMENIAN, HEBREW, ARABIC, SYRIAC, THAANA, NKO, SAMARITAN, MANDAIC, Arabic (again), DEVANAGARI, BENGALI, ORIYA, TAMIL,  TELUGU, KANNADA, MALAYALAM, SINHALA, LAO, TIBETAN, MYANMAR, GEORGIAN, HANGUL, ETHIOPIC, CHEROKEE, CANADIAN SYLLABICS
 // identifierHeads += Array("\u{0370}" ... "\u{167F}")

 // MARK: - OGHAM, RUNIC, TAGALOG, BUHID, TAGBANWA, KHMER,  MONGOLIAN,
 //identifierHeads += Array("\u{1681}" ... "\u{180D}")

 // MARK: - MONGOLIAN, LIMBU, TAI, NEW TAI, KHMER, BUGINESE, BATAK, LEPCHA, LATIN, GREEK, GREEK SUBSCRIPT,
 //identifierHeads += Array("\u{180F}" ... "\u{1DBF}")

 //identifierHeads += Array("\u{200B}" ... "\u{200D}")

 //identifierHeads += Array("\u{202A}" ... "\u{202E}")
 // identifierHeads += Array("\u{203F}" ... "\u{2040}")

 // MARK: - Mostly invisible
 // identifierHeads += Array("\u{2060}" ... "\u{206F}")

 //identifierHeads += Array("\u{2070}" ... "\u{20CF}")

 // MARK: - ROMAN
 //identifierHeads += Array("\u{2100}" ... "\u{218F}")

 // MARK: - CIRCLED symbols
 // identifierHeads += Array("\u{2460}" ... "\u{24FF}")

 // MARK: - DINGBAT
 //identifierHeads += Array("\u{2776}" ... "\u{2793}")

 // MARK: - COPTIC, GLAGOLITIC, TIFINAGH, ETHIOPIC
 //identifierHeads += Array("\u{2C00}" ... "\u{2DFF}")


 // MARK: - TO BE CLASSIFIED
 // identifierHeads += Array("\u{2E80}" ... "\u{2FFF}")
 // identifierHeads += Array("\u{3004}" ... "\u{3007}")
 // identifierHeads += Array("\u{3021}" ... "\u{302F}")
 // identifierHeads += Array("\u{3031}" ... "\u{303F}")
 // identifierHeads += Array("\u{3040}" ... "\u{D7FF}")
 // identifierHeads += Array("\u{F900}" ... "\u{FD3D}")
 // identifierHeads += Array("\u{FD40}" ... "\u{FDCF}")
 // identifierHeads += Array("\u{FDF0}" ... "\u{FE1F}")
 // identifierHeads += Array("\u{FE30}" ... "\u{FE44}")
 // identifierHeads += Array("\u{FE47}" ... "\u{FFFD}")

 // MARK: - UNASSIGNED UNICODE CHARS
 // identifierHeads += Array("\u{10000}" ... "\u{1FFFD}")
 // identifierHeads += Array("\u{20000}" ... "\u{2FFFD}")
 // identifierHeads += Array("\u{30000}" ... "\u{3FFFD}")
 // identifierHeads += Array("\u{40000}" ... "\u{4FFFD}")
 // identifierHeads += Array("\u{50000}" ... "\u{5FFFD}")
 // identifierHeads += Array("\u{60000}" ... "\u{6FFFD}")
 // identifierHeads += Array("\u{70000}" ... "\u{7FFFD}")
 // identifierHeads += Array("\u{80000}" ... "\u{8FFFD}")
 // identifierHeads += Array("\u{90000}" ... "\u{9FFFD}")
 // identifierHeads += Array("\u{A0000}" ... "\u{AFFFD}")
 // identifierHeads += Array("\u{B0000}" ... "\u{BFFFD}")
 // identifierHeads += Array("\u{C0000}" ... "\u{CFFFD}")
 // identifierHeads += Array("\u{D0000}" ... "\u{DFFFD}")
 // identifierHeads += Array("\u{E0000}" ... "\u{EFFFD}")


 let format = "%04X"
 let header = "\n| Character | Unicode Value | Unicode Name |\n|-----------|---------------|--------------|"

 func unicodeName(_ scalar: UnicodeScalar) -> String {
    guard let string = String(scalar).applyingTransform(StringTransform.toUnicodeName, reverse: false)
        else { return "" }

    return string
        .replacingOccurrences(of: "\\N{", with: "")
        .replacingOccurrences(of: "}", with: "")
 }

 print("# Allowed First Characters for Identifiers")
 print(header)
 identifierHeads.forEach {
    print("| \($0)         | \(String(format: format, $0.value))         | \(unicodeName($0)) |")
 }

diff --git a/result.md b/result.md
	import UIKit
	import Foundation

	// Written in Swift 4.2, Xcode 10 beta 6
	// Valid Identifier Heads found at: https://docs.swift.org/swift-book/ReferenceManual/LexicalStructure.html
	// Code inspired by Nate Cooks gist: https://gist.github.com/natecook1000/c5fb2b8cd0967f53770e


	extension UnicodeScalar : Strideable {

	public func distance(to other: UnicodeScalar) -> Int {
	return Int(other.value) - Int(self.value)
	}

	/// Returns a UnicodeScalar where the value is advanced by n.
	///
	/// - precondition: self.value + n represents a valid unicode scalar.
	///
	public func advanced(by n: Int) -> UnicodeScalar {
	let advancedValue = n + Int(self.value)
	guard let advancedScalar = UnicodeScalar(advancedValue) else {
	fatalError("\(String(advancedValue, radix: 16)) does not represent a valid unicode scalar value.")
	}
	return advancedScalar
	}
	}



	var identifierHeads: [UnicodeScalar] = ["\u{00A8}","\u{00AA}","\u{00AD}","\u{00AF}","\u{2054}"]
	identifierHeads += Array("\u{00B2}" ... "\u{00B5}")
	identifierHeads += Array("\u{00B7}" ... "\u{00BA}")
	identifierHeads += Array("\u{00BC}" ... "\u{00BE}")

	// MARK: - LATIN,GREEK
	//identifierHeads += Array("\u{00C0}" ... "\u{00D6}")
	//identifierHeads += Array("\u{00D8}" ... "\u{00F6}")
	//identifierHeads += Array("\u{00F8}" ... "\u{00FF}")
	//identifierHeads += Array("\u{1E00}" ... "\u{1FFF}")

	// MARK: - LATIN (again), "MODIFIER"
	// identifierHeads += Array("\u{0100}" ... "\u{02FF}")

	// MARK: - Some Greek, CYRILLIC, ARMENIAN, HEBREW, ARABIC, SYRIAC, THAANA, NKO, SAMARITAN, MANDAIC, Arabic (again), DEVANAGARI, BENGALI, ORIYA, TAMIL, TELUGU, KANNADA, MALAYALAM, SINHALA, LAO, TIBETAN, MYANMAR, GEORGIAN, HANGUL, ETHIOPIC, CHEROKEE, CANADIAN SYLLABICS
	// identifierHeads += Array("\u{0370}" ... "\u{167F}")

	// MARK: - OGHAM, RUNIC, TAGALOG, BUHID, TAGBANWA, KHMER, MONGOLIAN,
	//identifierHeads += Array("\u{1681}" ... "\u{180D}")

	// MARK: - MONGOLIAN, LIMBU, TAI, NEW TAI, KHMER, BUGINESE, BATAK, LEPCHA, LATIN, GREEK, GREEK SUBSCRIPT,
	//identifierHeads += Array("\u{180F}" ... "\u{1DBF}")

	//identifierHeads += Array("\u{200B}" ... "\u{200D}")

	//identifierHeads += Array("\u{202A}" ... "\u{202E}")
	// identifierHeads += Array("\u{203F}" ... "\u{2040}")

	// MARK: - Mostly invisible
	// identifierHeads += Array("\u{2060}" ... "\u{206F}")

	//identifierHeads += Array("\u{2070}" ... "\u{20CF}")

	// MARK: - ROMAN
	//identifierHeads += Array("\u{2100}" ... "\u{218F}")

	// MARK: - CIRCLED symbols
	// identifierHeads += Array("\u{2460}" ... "\u{24FF}")

	// MARK: - DINGBAT
	//identifierHeads += Array("\u{2776}" ... "\u{2793}")

	// MARK: - COPTIC, GLAGOLITIC, TIFINAGH, ETHIOPIC
	//identifierHeads += Array("\u{2C00}" ... "\u{2DFF}")


	// MARK: - TO BE CLASSIFIED
	// identifierHeads += Array("\u{2E80}" ... "\u{2FFF}")
	// identifierHeads += Array("\u{3004}" ... "\u{3007}")
	// identifierHeads += Array("\u{3021}" ... "\u{302F}")
	// identifierHeads += Array("\u{3031}" ... "\u{303F}")
	// identifierHeads += Array("\u{3040}" ... "\u{D7FF}")
	// identifierHeads += Array("\u{F900}" ... "\u{FD3D}")
	// identifierHeads += Array("\u{FD40}" ... "\u{FDCF}")
	// identifierHeads += Array("\u{FDF0}" ... "\u{FE1F}")
	// identifierHeads += Array("\u{FE30}" ... "\u{FE44}")
	// identifierHeads += Array("\u{FE47}" ... "\u{FFFD}")

	// MARK: - UNASSIGNED UNICODE CHARS
	// identifierHeads += Array("\u{10000}" ... "\u{1FFFD}")
	// identifierHeads += Array("\u{20000}" ... "\u{2FFFD}")
	// identifierHeads += Array("\u{30000}" ... "\u{3FFFD}")
	// identifierHeads += Array("\u{40000}" ... "\u{4FFFD}")
	// identifierHeads += Array("\u{50000}" ... "\u{5FFFD}")
	// identifierHeads += Array("\u{60000}" ... "\u{6FFFD}")
	// identifierHeads += Array("\u{70000}" ... "\u{7FFFD}")
	// identifierHeads += Array("\u{80000}" ... "\u{8FFFD}")
	// identifierHeads += Array("\u{90000}" ... "\u{9FFFD}")
	// identifierHeads += Array("\u{A0000}" ... "\u{AFFFD}")
	// identifierHeads += Array("\u{B0000}" ... "\u{BFFFD}")
	// identifierHeads += Array("\u{C0000}" ... "\u{CFFFD}")
	// identifierHeads += Array("\u{D0000}" ... "\u{DFFFD}")
	// identifierHeads += Array("\u{E0000}" ... "\u{EFFFD}")


	let format = "%04X"
	let header = "\n\| Character \| Unicode Value \| Unicode Name \|\n\|-----------\|---------------\|--------------\|"

	func unicodeName(_ scalar: UnicodeScalar) -> String {
	guard let string = String(scalar).applyingTransform(StringTransform.toUnicodeName, reverse: false)
	else { return "" }

	return string
	.replacingOccurrences(of: "\\N{", with: "")
	.replacingOccurrences(of: "}", with: "")
	}

	print("# Allowed First Characters for Identifiers")
	print(header)
	identifierHeads.forEach {
	print("\| \($0) \| \(String(format: format, $0.value)) \| \(unicodeName($0)) \|")
	}