fix: fixed initialized immutable variables not encoded by default (#47)

Author: soumyamahunt

Sources/CodableMacroPlugin/Builders/IgnoreCodingBuilder.swift

@@ -43,8 +43,8 @@ struct IgnoreCodingBuilder<Input: Variable>: RegistrationBuilder {
 /// An attribute type indicating explicit decoding/encoding when attached
 /// to variable declarations.
 ///
-/// Attaching attributes of this type to computed properties or initialized
-/// immutable properties indicates this variable should be encoded for the type.
+/// Attaching attributes of this type to computed properties indicates
+/// this variable should be encoded for the type.
 fileprivate protocol CodingAttribute: PropertyAttribute {}
 extension CodedIn: CodingAttribute {}
 extension CodedAt: CodingAttribute {}

Sources/CodableMacroPlugin/Variables/InitializationVariable.swift

@@ -43,10 +43,12 @@ where Wrapped.Initialization: RequiredVariableInitialization {
     var decode: Bool? { options.`init` ? base.decode : false }
     /// Whether the variable is to be encoded.
     ///
-    /// Depends on whether variable is initializable if underlying variable doesn't
-    /// specify explicit encoding. Otherwise depends on whether underlying variable
-    /// is to be decoded.
-    var encode: Bool? { base.encode ?? options.`init` }
+    /// Depends on whether variable is initializable if underlying variable
+    /// doesn't specify explicit encoding. Otherwise depends on whether
+    /// underlying variable is to be decoded.
+    var encode: Bool? {
+        return base.encode ?? (options.initialized || options.`init`)
+    }
 
     /// Whether the variable type requires `Decodable` conformance.
     ///
@@ -63,7 +65,7 @@ where Wrapped.Initialization: RequiredVariableInitialization {
     /// specifies explicit encoding. Otherwise depends on
     /// whether underlying variable is to be decoded.
     var requireEncodable: Bool? {
-        return base.requireEncodable ?? options.`init`
+        return base.requireEncodable ?? (options.initialized || options.`init`)
     }
 
     /// Indicates the initialization type for this variable.

Sources/MetaCodable/IgnoreCoding.swift

@@ -1,7 +1,7 @@
 /// Indicates the field needs to ignored from decoding and encoding.
 ///
-/// This macro can be applied to initialized mutable variables to ignore
-/// them from both decoding and encoding.
+/// This macro can be applied to initialized variables to ignore them
+/// from both decoding and encoding.
 /// ```swift
 /// @IgnoreCoding
 /// var field: String = "some"

Tests/MetaCodableTests/GroupedVariableTests.swift

@@ -87,13 +87,15 @@ final class GroupedVariableTests: XCTestCase {
                         var container = encoder.container(keyedBy: CodingKeys.self)
                         try container.encode(self.one, forKey: CodingKeys.one)
                         try container.encode(self.two, forKey: CodingKeys.two)
+                        try container.encode(self.three, forKey: CodingKeys.three)
                     }
                 }
 
                 extension SomeCodable {
                     enum CodingKeys: String, CodingKey {
                         case one = "one"
                         case two = "two"
+                        case three = "three"
                     }
                 }
                 """
@@ -220,13 +222,15 @@ final class GroupedVariableTests: XCTestCase {
                     func encode(to encoder: any Encoder) throws {
                         var container = encoder.container(keyedBy: CodingKeys.self)
                         try container.encode(self.one, forKey: CodingKeys.one)
+                        try container.encode(self.two, forKey: CodingKeys.two)
                         try container.encode(self.three, forKey: CodingKeys.three)
                     }
                 }
 
                 extension SomeCodable {
                     enum CodingKeys: String, CodingKey {
                         case one = "one"
+                        case two = "two"
                         case three = "three"
                     }
                 }
@@ -266,13 +270,15 @@ final class GroupedVariableTests: XCTestCase {
                     func encode(to encoder: any Encoder) throws {
                         var container = encoder.container(keyedBy: CodingKeys.self)
                         try container.encode(self.one, forKey: CodingKeys.one)
+                        try container.encode(self.two, forKey: CodingKeys.two)
                         try container.encode(self.three, forKey: CodingKeys.three)
                     }
                 }
 
                 extension SomeCodable {
                     enum CodingKeys: String, CodingKey {
                         case one = "one"
+                        case two = "two"
                         case three = "three"
                     }
                 }

Tests/MetaCodableTests/VariableDeclarationTests.swift

@@ -30,11 +30,14 @@ final class VariableDeclarationTests: XCTestCase {
 
                 extension SomeCodable: Encodable {
                     func encode(to encoder: any Encoder) throws {
+                        var container = encoder.container(keyedBy: CodingKeys.self)
+                        try container.encode(self.value, forKey: CodingKeys.value)
                     }
                 }
 
                 extension SomeCodable {
                     enum CodingKeys: String, CodingKey {
+                        case value = "value"
                     }
                 }
                 """