Fixed WebAssembly support

Author: colemancda

Sources/Decoder.swift

@@ -356,23 +356,26 @@ private extension TLVDecoder.Decoder {
         case .millisecondsSince1970:
             let timeInterval = try unboxDouble(data)
             return Date(timeIntervalSince1970: timeInterval / 1000)
+        #if !os(WASI)
         case .iso8601:
             guard #available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *)
                 else { fatalError("ISO8601DateFormatter is unavailable on this platform.") }
             return try unboxDate(data, using: TLVDateFormatting.iso8601Formatter)
         case let .formatted(formatter):
             return try unboxDate(data, using: formatter)
+        #endif
         }
     }
 
-    @inline(__always)
+    #if !os(WASI)
     func unboxDate <T: DateFormatterProtocol> (_ data: Data, using formatter: T) throws -> Date {
         let string = try unbox(data, as: String.self)
         guard let date = formatter.date(from: string) else {
             throw DecodingError.dataCorrupted(DecodingError.Context(codingPath: codingPath, debugDescription: "Invalid Date string \(string)"))
         }
         return date
     }
+    #endif
 }
 
 // MARK: - Stack

Sources/Encoder.swift

@@ -267,18 +267,22 @@ private extension TLVEncoder.Encoder {
             return boxDouble(date.timeIntervalSince1970)
         case .millisecondsSince1970:
             return boxDouble(date.timeIntervalSince1970 * 1000)
+        #if !os(WASI)
         case .iso8601:
             guard #available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *)
                 else { fatalError("ISO8601DateFormatter is unavailable on this platform.") }
             return boxDate(date, using: TLVDateFormatting.iso8601Formatter)
         case let .formatted(formatter):
             return boxDate(date, using: formatter)
+        #endif
         }
     }
 
+    #if !os(WASI)
     func boxDate <T: DateFormatterProtocol> (_ date: Date, using formatter: T) -> Data {
         return box(formatter.string(from: date))
     }
+    #endif
 }
 
 // MARK: - Stack

Sources/Format.swift

@@ -68,12 +68,14 @@ public enum TLVDateFormatting: Equatable {
     /// Encodes dates in terms of milliseconds since midnight UTC on January 1, 1970.
     case millisecondsSince1970
 
+    #if !os(WASI)
     /// Formats dates according to the ISO 8601 and RFC 3339 standards.
     @available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *)
     case iso8601
 
     /// Defers formatting settings to a supplied date formatter.
     case formatted(DateFormatter)
+    #endif
 }
 
 public extension TLVDateFormatting {
@@ -89,6 +91,14 @@ public typealias TLVDateFormat = TLVDateFormatting
 
 // MARK: - Formatters
 
+#if !os(WASI)
+internal protocol DateFormatterProtocol: AnyObject {
+    
+    func string(from date: Date) -> String
+    
+    func date(from string: String) -> Date?
+}
+
 internal extension TLVDateFormatting {
 
     @available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *)
@@ -99,14 +109,8 @@ internal extension TLVDateFormatting {
     }()
 }
 
-internal protocol DateFormatterProtocol: class {
-    
-    func string(from date: Date) -> String
-    
-    func date(from string: String) -> Date?
-}
-
 extension DateFormatter: DateFormatterProtocol { }
 
 @available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *)
 extension ISO8601DateFormatter: DateFormatterProtocol { }
+#endif

Tests/TLVCodingTests/TLVCodingTests.swift

@@ -279,18 +279,23 @@ final class TLVCodingTests: XCTestCase {
 
     func testDate() {
 
+        var formats: [TLVDateFormatting] = [
+            .secondsSince1970,
+            .millisecondsSince1970
+        ]
+        
+        #if !os(WASI)
         let dateFormatter = DateFormatter()
         dateFormatter.locale = Locale(identifier: "en_US_POSIX")
         dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
         dateFormatter.calendar = Calendar(identifier: .gregorian)
         dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
-        
-        var formats: [TLVDateFormatting] = [.secondsSince1970, .millisecondsSince1970, .formatted(dateFormatter)]
-        
+        formats.append(.formatted(dateFormatter))
         if #available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {
             formats.append(.iso8601)
         }
-        
+        #endif
+
         let date = Date(timeIntervalSince1970: 60 * 60 * 24 * 365)
 
         for format in formats {