From 3d1ad7f34733bab5f68b8c3d5c6f97a934af5d5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Helge=20He=C3=9F?= <devteam@zeezide.de>
Date: Tue, 18 Jun 2024 15:31:40 +0200
Subject: [PATCH] Avoid Swift 6 compilation errors on Linux

Sendability.
---
 .../Generation/GenLiterals.swift              | 18 +++++++----
 .../Database/SQLDatabaseCreation.swift        |  6 +++-
 Sources/Lighter/Schema/SQLiteValueType.swift  | 31 ++++++++++++-------
 3 files changed, 37 insertions(+), 18 deletions(-)

diff --git a/Plugins/Libraries/LighterCodeGenAST/Generation/GenLiterals.swift b/Plugins/Libraries/LighterCodeGenAST/Generation/GenLiterals.swift
index 1095afc..e638876 100644
--- a/Plugins/Libraries/LighterCodeGenAST/Generation/GenLiterals.swift
+++ b/Plugins/Libraries/LighterCodeGenAST/Generation/GenLiterals.swift
@@ -78,12 +78,18 @@ fileprivate func poundsForString(_ string: String, max: Int = 10) -> String? {
   return nil
 }
 
-fileprivate let unsafeSwiftStringLiteralCharacters : CharacterSet = {
-  var safeCharacters = CharacterSet.alphanumerics
-  safeCharacters.formUnion(.whitespaces)
-  safeCharacters.formUnion(.init(charactersIn: "_,;&'@#!$(){}+-*/:."))
-  return safeCharacters.inverted
-}()
+fileprivate struct UnsafeLiteralCharacters: @unchecked Sendable {
+  
+  private let set : CharacterSet = {
+    var safeCharacters = CharacterSet.alphanumerics
+    safeCharacters.formUnion(.whitespaces)
+    safeCharacters.formUnion(.init(charactersIn: "_,;&'@#!$(){}+-*/:."))
+    return safeCharacters.inverted
+  }()
+  
+  func contains(_ c: Unicode.Scalar) -> Bool { return set.contains(c) }
+}
+fileprivate let unsafeSwiftStringLiteralCharacters = UnsafeLiteralCharacters()
 
 extension String {
   
diff --git a/Sources/Lighter/Database/SQLDatabaseCreation.swift b/Sources/Lighter/Database/SQLDatabaseCreation.swift
index 07b2704..c42572d 100644
--- a/Sources/Lighter/Database/SQLDatabaseCreation.swift
+++ b/Sources/Lighter/Database/SQLDatabaseCreation.swift
@@ -12,12 +12,16 @@ public protocol SQLCreationStatementsHolder {
   static var creationSQL : String { get }
 }
 
-
 #if canImport(Foundation)
+#if !(os(macOS) || os(iOS) || os(watchOS) || os(tvOS)) && swift(>=5.10)
+@preconcurrency import Foundation
+#else
 import struct Foundation.URL
 import class  Foundation.FileManager
+#endif
 import SQLite3
 
+
 public extension SQLDatabase {
   
   /**
diff --git a/Sources/Lighter/Schema/SQLiteValueType.swift b/Sources/Lighter/Schema/SQLiteValueType.swift
index 2a3c5e6..665fbc9 100644
--- a/Sources/Lighter/Schema/SQLiteValueType.swift
+++ b/Sources/Lighter/Schema/SQLiteValueType.swift
@@ -5,15 +5,24 @@
 
 import SQLite3
 #if canImport(Foundation)
-import struct Foundation.URL
-import struct Foundation.Date
-import struct Foundation.TimeInterval
-import class  Foundation.DateFormatter
-import struct Foundation.Data
-import struct Foundation.Decimal
-import func   Foundation.NSDecimalString
-import struct Foundation.Locale
-import struct Foundation.UUID
+#if !(os(macOS) || os(iOS) || os(watchOS) || os(tvOS)) && swift(>=5.10)
+  @preconcurrency import Foundation
+  #if compiler(<6) // seems necessary?
+    extension Decimal : @unchecked Sendable {}
+    extension Locale  : @unchecked Sendable {}
+    extension URL     : @unchecked Sendable {}
+  #endif
+#else
+  import struct Foundation.URL
+  import struct Foundation.Date
+  import struct Foundation.TimeInterval
+  import class  Foundation.DateFormatter
+  import struct Foundation.Data
+  import struct Foundation.Decimal
+  import func   Foundation.NSDecimalString
+  import struct Foundation.Locale
+  import struct Foundation.UUID
+#endif // Darwin
 #endif
 
 /**
@@ -659,8 +668,8 @@ extension Data: SQLiteValueType {
   }
 }
 
-extension URL : SQLiteValueType {
-  
+extension URL : SQLiteValueType {}
+extension URL {
   public struct SQLCouldNotParseURL: Swift.Error, Sendable {
     public let string : String
     public init(string: String) { self.string = string }