Merge pull request #6 from adam-fowler/sendable

Sendable conformance

Author: adam-fowler

Sources/JMESPath/Ast.swift

@@ -39,7 +39,7 @@ public indirect enum Ast: Equatable {
 }
 
 /// Comparator used in comparison AST nodes
-public enum Comparator: Equatable {
+public enum Comparator: Equatable, JMESSendable {
     case equal
     case notEqual
     case lessThan
@@ -61,3 +61,9 @@ public enum Comparator: Equatable {
         }
     }
 }
+
+#if compiler(>=5.6)
+// have to force Sendable conformance as enum `.literal` uses `JMESVariable` which
+// is not necessarily sendable but in the use here it is
+extension Ast: @unchecked Sendable {}
+#endif

Sources/JMESPath/Expression.swift

@@ -3,7 +3,7 @@ import Foundation
 /// JMES Expression
 ///
 /// Holds a compiled JMES expression and allows you to search Json text or a type already in memory
-public struct JMESExpression {
+public struct JMESExpression: JMESSendable {
     let ast: Ast
 
     public static func compile(_ text: String) throws -> Self {

Sources/JMESPath/Sendable.swift

@@ -0,0 +1,7 @@
+// Sendable support 
+
+#if compiler(>=5.6)
+public typealias JMESSendable = Sendable
+#else
+public typealias JMESSendable = Any
+#endif