Remove script data

Author: Azoy

Package.swift

@@ -57,14 +57,10 @@ let package = Package(
             dependencies: [
                 "_RegexParser", "_StringProcessing"
             ]),
-        .target(
-            name: "_CUnicode",
-            dependencies: []),
         .target(
             name: "_StringProcessing",
             dependencies: [
-              "_RegexParser",
-              "_CUnicode",
+              "_RegexParser"
             ],
             swiftSettings: publicStdlibSettings),
         .target(

Sources/_CUnicode/Common/ScriptData.h

@@ -9,6 +9,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+@_spi(_Unicode) import Swift
 @_implementationOnly import _RegexParser
 
 extension DSLTree.Node {
@@ -371,10 +372,23 @@ extension DSLTree.CustomCharacterClass {
 typealias ScalarPredicate = (UnicodeScalar) -> Bool
 
 private func scriptScalarPredicate(_ s: Unicode.Script) -> ScalarPredicate {
-  { Unicode.Script($0) == s }
+  {
+    if #available(SwiftStdlib 5.7, *) {
+      return unsafeBitCast($0.properties._script, to: Unicode.Script.self) == s
+    } else {
+      return false
+    }
+  }
 }
 private func scriptExtensionScalarPredicate(_ s: Unicode.Script) -> ScalarPredicate {
-  { Unicode.Script.extensions(for: $0).contains(s) }
+  {
+    if #available(SwiftStdlib 5.7, *) {
+      let extensions = $0.properties._scriptExtensions
+      return extensions.contains(unsafeBitCast(s, to: UInt8.self))
+    } else {
+      return false
+    }
+  }
 }
 private func categoryScalarPredicate(_ gc: Unicode.GeneralCategory) -> ScalarPredicate {
   { gc == $0.properties.generalCategory }

Sources/_CUnicode/UnicodeData.c

@@ -9,44 +9,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-@_silgen_name("_swift_stdlib_getScript")
-func _swift_stdlib_getScript(_: UInt32) -> UInt8
-
-@_silgen_name("_swift_stdlib_getScriptExtensions")
-func _swift_stdlib_getScriptExtensions(
-  _: UInt32,
-  _: UnsafeMutablePointer<UInt8>
-) -> UnsafePointer<UInt8>?
-
-extension Unicode.Script {
-  init(_ scalar: Unicode.Scalar) {
-    let rawValue = _swift_stdlib_getScript(scalar.value)
-    
-    _internalInvariant(rawValue != .max, "Unknown script rawValue: \(rawValue)")
-    
-    self = unsafeBitCast(rawValue, to: Self.self)
-  }
-  
-  static func extensions(for scalar: Unicode.Scalar) -> [Unicode.Script] {
-    var count: UInt8 = 0
-    let pointer = _swift_stdlib_getScriptExtensions(scalar.value, &count)
-    
-    guard let pointer = pointer else {
-      return [Unicode.Script(scalar)]
-    }
-    
-    var result: [Unicode.Script] = []
-    
-    for i in 0 ..< count {
-      let script = pointer[Int(i)]
-      
-      result.append(unsafeBitCast(script, to: Unicode.Script.self))
-    }
-    
-    return result
-  }
-}
-
 extension UnicodeScalar {
   var isHorizontalWhitespace: Bool {
     value == 0x09 || properties.generalCategory == .spaceSeparator