Merge branch 'swift/release/5.7' into main_as_of_12_may

Author: natecook1000

Sources/_StringProcessing/ByteCodeGen.swift

@@ -188,7 +188,6 @@ extension Compiler.ByteCodeGen {
   mutating func emitCharacter(_ c: Character) throws {
     // Unicode scalar matches the specific scalars that comprise a character
     if options.semanticLevel == .unicodeScalar {
-      print("emitting '\(c)' as a sequence of \(c.unicodeScalars.count) scalars")
       for scalar in c.unicodeScalars {
         try emitScalar(scalar)
       }

Tests/RegexBuilderTests/AlgorithmsTests.swift

@@ -13,6 +13,7 @@ import XCTest
 import _StringProcessing
 import RegexBuilder
 
+@available(SwiftStdlib 5.7, *)
 class RegexConsumerTests: XCTestCase {
   func testMatches() {
     let regex = Capture(OneOrMore(.digit)) { 2 * Int($0)! }

Tests/RegexTests/CaptureTests.swift

@@ -39,8 +39,7 @@ extension CaptureList.Capture {
   }
 
   static func named(_ name: String, opt: Int = 0) -> Self {
-    return Self(name: name, optionalDepth: opt, .fake)
-  }
+    return Self(name: name, optionalDepth: opt, .fake)  }
 }
 extension CaptureList {
   static func caps(count: Int) -> Self {

Tests/RegexTests/ParseTests.swift

@@ -2669,6 +2669,10 @@ extension RegexTests {
     diagnosticTest(#"[\d--\u{a b}]"#, .unsupported("scalar sequence in custom character class"))
     diagnosticTest(#"[\d--[\u{a b}]]"#, .unsupported("scalar sequence in custom character class"))
 
+    // MARK: Unicode scalars
+
+    diagnosticTest(#"\u{G}"#, .expectedNumber("G", kind: .hex))
+
     // MARK: Matching options
 
     diagnosticTest(#"(?^-"#, .cannotRemoveMatchingOptionsAfterCaret)