feat: added support for RawRepresentable enum conformance generation (#147)

* feat: added support for `RawRepresentable` enum conformance generation

* fix: fixed podspecs

* ci: added swift-syntax 602 version

Author: soumyamahunt

.github/workflows/main.yml

@@ -176,14 +176,22 @@ jobs:
             },
             {
               "os": "ubuntu-latest",
-              "swift": "latest"
+              "swift": "6.2",
+              "dependencies": {
+                "swift-syntax": "602.0.0"
+              }
             },
             {
               "os": "macos-15",
               "swift": "6.1.2"
             }
           ]
         }
+      # disable until prebuilt macro issues are fixed
+      # {
+      #   "os": "ubuntu-latest",
+      #   "swift": "latest"
+      # },
 
   cocoapods-test:
     name: CocoaPods

MetaCodableHelperCoders.podspec

@@ -4,4 +4,8 @@ Pod::Spec.new do |s|
   s.module_name = "HelperCoders"
   s.define
   s.dependency 'MetaCodableMacro', "= #{s.version}"
+
+  s.pod_target_xcconfig = {
+    'OTHER_SWIFT_FLAGS' => "-Xfrontend -package-name -Xfrontend MetaCodable",
+  }
 end

MetaCodableMacro.podspec

@@ -28,10 +28,12 @@ Pod::Spec.new do |s|
     :execution_position => :before_compile
   }
 
-  xcconfig = {
+  s.user_target_xcconfig = {
     'OTHER_SWIFT_FLAGS' => "-Xfrontend -load-plugin-executable -Xfrontend #{plugin_path}",
     'METACODABLE_PLUGIN_BUILD_ENVIRONMENT' => 'METACODABLE_BEING_USED_FROM_COCOAPODS=true'
   }
-  s.user_target_xcconfig = xcconfig
-  s.pod_target_xcconfig = xcconfig
+  s.pod_target_xcconfig = {
+    'OTHER_SWIFT_FLAGS' => "-Xfrontend -load-plugin-executable -Xfrontend #{plugin_path} -Xfrontend -package-name -Xfrontend MetaCodable",
+    'METACODABLE_PLUGIN_BUILD_ENVIRONMENT' => 'METACODABLE_BEING_USED_FROM_COCOAPODS=true'
+  }
 end

Package.swift

@@ -20,7 +20,7 @@ let package = Package(
         .plugin(name: "MetaProtocolCodable", targets: ["MetaProtocolCodable"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"602.0.0"),
+        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"603.0.0"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.0.4"),
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.2"),
         .package(url: "https://github.com/swiftlang/swift-docc-plugin", from: "1.0.0"),
@@ -47,6 +47,7 @@ let package = Package(
                 .product(name: "SwiftSyntax", package: "swift-syntax"),
                 .product(name: "SwiftSyntaxMacros", package: "swift-syntax"),
                 .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
+                .product(name: "SwiftSyntaxMacroExpansion", package: "swift-syntax"),
             ]
         ),
         .target(name: "MetaCodable", dependencies: ["MacroPlugin"]),

[email protected]

@@ -20,7 +20,7 @@ let package = Package(
         .plugin(name: "MetaProtocolCodable", targets: ["MetaProtocolCodable"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"602.0.0"),
+        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"603.0.0"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.0.4"),
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.2"),
     ],
@@ -46,6 +46,7 @@ let package = Package(
                 .product(name: "SwiftSyntax", package: "swift-syntax"),
                 .product(name: "SwiftSyntaxMacros", package: "swift-syntax"),
                 .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
+                .product(name: "SwiftSyntaxMacroExpansion", package: "swift-syntax"),
             ]
         ),
         .target(name: "MetaCodable", dependencies: ["MacroPlugin"]),

Sources/HelperCoders/ValueCoders/Number.swift

@@ -3,7 +3,7 @@
 protocol NumberCodingStrategy: ValueCodingStrategy where Value == Self {}
 
 public extension ValueCodingStrategy
-where Value: Decodable & ExpressibleByIntegerLiteral & LosslessStringConvertible
+where Value: Decodable & ExpressibleByIntegerLiteral & LosslessStringConvertible & Sendable
 {
     /// Decodes numeric data from the given `decoder`.
     ///

Sources/MacroPlugin/Definitions.swift

@@ -707,7 +707,7 @@ struct UnTagged: PeerMacro {
 /// implementation depending on the type of attached declaration:
 ///   * `struct`/`class`/`enum`/`actor` types: Expansion of `Decodable`
 ///     protocol conformance members.
-public struct ConformDecodable: MemberMacro, ExtensionMacro {
+struct ConformDecodable: MemberMacro, ExtensionMacro {
     /// Expand to produce members for `Decodable`.
     ///
     /// Membership macro expansion for `ConformDecodable` macro
@@ -719,7 +719,7 @@ public struct ConformDecodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated member expansion from `PluginCore.ConformDecodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         providingMembersOf declaration: some DeclGroupSyntax,
         in context: some MacroExpansionContext
@@ -743,7 +743,7 @@ public struct ConformDecodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated member expansion from `PluginCore.ConformDecodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         providingMembersOf declaration: some DeclGroupSyntax,
         conformingTo protocols: [TypeSyntax],
@@ -769,7 +769,7 @@ public struct ConformDecodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated extension expansion from `PluginCore.ConformDecodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         attachedTo declaration: some DeclGroupSyntax,
         providingExtensionsOf type: some TypeSyntaxProtocol,
@@ -791,7 +791,7 @@ public struct ConformDecodable: MemberMacro, ExtensionMacro {
 /// implementation depending on the type of attached declaration:
 ///   * `struct`/`class`/`enum`/`actor` types: Expansion of `Encodable`
 ///     protocol conformance members.
-public struct ConformEncodable: MemberMacro, ExtensionMacro {
+struct ConformEncodable: MemberMacro, ExtensionMacro {
     /// Expand to produce members for `Encodable`.
     ///
     /// Membership macro expansion for `ConformEncodable` macro
@@ -803,7 +803,7 @@ public struct ConformEncodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated member expansion from `PluginCore.ConformEncodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         providingMembersOf declaration: some DeclGroupSyntax,
         in context: some MacroExpansionContext
@@ -827,7 +827,7 @@ public struct ConformEncodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated member expansion from `PluginCore.ConformEncodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         providingMembersOf declaration: some DeclGroupSyntax,
         conformingTo protocols: [TypeSyntax],
@@ -853,7 +853,7 @@ public struct ConformEncodable: MemberMacro, ExtensionMacro {
     ///   - context: The context in which to perform the macro expansion.
     ///
     /// - Returns: Delegated extension expansion from `PluginCore.ConformEncodable`.
-    public static func expansion(
+    static func expansion(
         of node: AttributeSyntax,
         attachedTo declaration: some DeclGroupSyntax,
         providingExtensionsOf type: some TypeSyntaxProtocol,

Sources/MetaCodable/MetaCodable.docc/Limitations.md

@@ -61,17 +61,13 @@ enum SomeEnum {
 }
 ```
 
-### Why enums with raw value aren't supported?
-
-`Swift` compiler by default generates `Codable` conformance for `enum`s with raw value and `MetaCodable` has nothing extra to add for these type of `enum`s. Hence, in this case the default compiler generated implementation can be used.
-
 ### Why actor conformance to Encodable not generated?
 
 For `actor`s ``Codable(commonStrategies:)`` generates `Decodable` conformance, while `Encodable` conformance isn't generated, only `encode(to:)` method implementation is generated which is isolated to `actor`.
 
 To generate `Encodable` conformance, the `encode(to:)` method must be `nonisolated` to `actor`, and since `encode(to:)` method must be synchronous making it `nonisolated` will prevent accessing mutable properties.
 
-Due to these limitations, `Encodable` conformance isn't generated, users has to implement the conformance manually.
+Due to these limitations, `Encodable` conformance isn't generated, users have to implement the conformance manually.
 
 ### Why MetaProtocolCodable plugin can't scan Xcode target dependencies?
 

Sources/MetaCodable/MetaCodable.docc/MetaCodable.md

@@ -10,7 +10,6 @@ Supercharge `Swift`'s `Codable` implementations with macros.
 
 `MetaCodable` framework exposes custom macros which can be used to generate dynamic `Codable` implementations. The core of the framework is ``Codable(commonStrategies:)`` macro which generates the implementation aided by data provided with using other macros.
 
-
 `MetaCodable` aims to supercharge your `Codable` implementations by providing these inbox features:
 
 - Allows custom `CodingKey` value declaration per variable with ``CodedAt(_:)`` passing single argument, instead of requiring you to write all the `CodingKey` values.

Sources/PluginCore/Attributes/CodedBy.swift

@@ -54,8 +54,13 @@ package struct CodedBy: PropertyAttribute {
                 isEnum || isProtocol,
                 AggregatedDiagnosticProducer {
                     mustBeCombined(with: Codable.self)
-                    mustBeCombined(
-                        with: CodedAt.self, or: DecodedAt.self, EncodedAt.self
+                    `if`(
+                        isRawRepresentableEnum,
+                        mustBeCombined(with: Codable.self),
+                        else: mustBeCombined(
+                            with: CodedAt.self,
+                            or: DecodedAt.self, EncodedAt.self
+                        )
                     )
                 },
                 else: AggregatedDiagnosticProducer {