[Vertex AI] Replace "enum" computed properties with static let (#13870)

Author: andrewheard

FirebaseVertexAI/Sources/FunctionCalling.swift

@@ -84,22 +84,16 @@ public struct FunctionCallingConfig {
     /// The default behavior for function calling.
     ///
     /// The model calls functions to answer queries at its discretion.
-    public static var auto: Mode {
-      return self.init(kind: .auto)
-    }
+    public static let auto = Mode(kind: .auto)
 
     /// The model always predicts a provided function call to answer every query.
-    public static var any: Mode {
-      return self.init(kind: .any)
-    }
+    public static let any = Mode(kind: .any)
 
     /// The model will never predict a function call to answer a query.
     ///
     /// > Note: This can also be achieved by not passing any ``FunctionDeclaration`` tools
     /// > when instantiating the model.
-    public static var none: Mode {
-      return self.init(kind: .none)
-    }
+    public static let none = Mode(kind: .none)
 
     let rawValue: String
   }

FirebaseVertexAI/Sources/GenerateContentResponse.swift

@@ -159,62 +159,43 @@ public struct FinishReason: DecodableProtoEnum, Hashable, Sendable {
   }
 
   /// Natural stop point of the model or provided stop sequence.
-  public static var stop: FinishReason {
-    return self.init(kind: .stop)
-  }
+  public static let stop = FinishReason(kind: .stop)
 
   /// The maximum number of tokens as specified in the request was reached.
-  public static var maxTokens: FinishReason {
-    return self.init(kind: .maxTokens)
-  }
+  public static let maxTokens = FinishReason(kind: .maxTokens)
 
   /// The token generation was stopped because the response was flagged for safety reasons.
   ///
   /// > NOTE: When streaming, the ``CandidateResponse/content`` will be empty if content filters
   /// > blocked the output.
-  public static var safety: FinishReason {
-    return self.init(kind: .safety)
-  }
+  public static let safety = FinishReason(kind: .safety)
 
   /// The token generation was stopped because the response was flagged for unauthorized citations.
-  public static var recitation: FinishReason {
-    return self.init(kind: .recitation)
-  }
+  public static let recitation = FinishReason(kind: .recitation)
 
   /// All other reasons that stopped token generation.
-  public static var other: FinishReason {
-    return self.init(kind: .other)
-  }
+  public static let other = FinishReason(kind: .other)
 
   /// Token generation was stopped because the response contained forbidden terms.
-  public static var blocklist: FinishReason {
-    return self.init(kind: .blocklist)
-  }
+  public static let blocklist = FinishReason(kind: .blocklist)
 
   /// Token generation was stopped because the response contained potentially prohibited content.
-  public static var prohibitedContent: FinishReason {
-    return self.init(kind: .prohibitedContent)
-  }
+  public static let prohibitedContent = FinishReason(kind: .prohibitedContent)
 
   /// Token generation was stopped because of Sensitive Personally Identifiable Information (SPII).
-  public static var spii: FinishReason {
-    return self.init(kind: .spii)
-  }
+  public static let spii = FinishReason(kind: .spii)
 
   /// Token generation was stopped because the function call generated by the model was invalid.
-  public static var malformedFunctionCall: FinishReason {
-    return self.init(kind: .malformedFunctionCall)
-  }
+  public static let malformedFunctionCall = FinishReason(kind: .malformedFunctionCall)
 
   /// Returns the raw string representation of the `FinishReason` value.
   ///
   /// > Note: This value directly corresponds to the values in the [REST
   /// > API](https://cloud.google.com/vertex-ai/docs/reference/rest/v1beta1/GenerateContentResponse#FinishReason).
   public let rawValue: String
 
-  var unrecognizedValueMessageCode: VertexLog.MessageCode {
-    .generateContentResponseUnrecognizedFinishReason
-  }
+  static let unrecognizedValueMessageCode =
+    VertexLog.MessageCode.generateContentResponseUnrecognizedFinishReason
 }
 
 /// A metadata struct containing any feedback the model had on the prompt it was provided.
@@ -230,34 +211,25 @@ public struct PromptFeedback: Sendable {
     }
 
     /// The prompt was blocked because it was deemed unsafe.
-    public static var safety: BlockReason {
-      return self.init(kind: .safety)
-    }
+    public static let safety = BlockReason(kind: .safety)
 
     /// All other block reasons.
-    public static var other: BlockReason {
-      return self.init(kind: .other)
-    }
+    public static let other = BlockReason(kind: .other)
 
     /// The prompt was blocked because it contained terms from the terminology blocklist.
-    public static var blocklist: BlockReason {
-      return self.init(kind: .blocklist)
-    }
+    public static let blocklist = BlockReason(kind: .blocklist)
 
     /// The prompt was blocked due to prohibited content.
-    public static var prohibitedContent: BlockReason {
-      return self.init(kind: .prohibitedContent)
-    }
+    public static let prohibitedContent = BlockReason(kind: .prohibitedContent)
 
     /// Returns the raw string representation of the `BlockReason` value.
     ///
     /// > Note: This value directly corresponds to the values in the [REST
     /// > API](https://cloud.google.com/vertex-ai/docs/reference/rest/v1beta1/GenerateContentResponse#BlockedReason).
     public let rawValue: String
 
-    var unrecognizedValueMessageCode: VertexLog.MessageCode {
-      .generateContentResponseUnrecognizedBlockReason
-    }
+    static let unrecognizedValueMessageCode =
+      VertexLog.MessageCode.generateContentResponseUnrecognizedBlockReason
   }
 
   /// The reason a prompt was blocked, if it was blocked.

FirebaseVertexAI/Sources/Protocols/Internal/CodableProtoEnum.swift

@@ -47,7 +47,7 @@ protocol ProtoEnum {
 /// provided when conforming to this type.
 protocol DecodableProtoEnum: ProtoEnum, Decodable {
   /// Returns the ``VertexLog/MessageCode`` associated with unrecognized (unknown) enum values.
-  var unrecognizedValueMessageCode: VertexLog.MessageCode { get }
+  static var unrecognizedValueMessageCode: VertexLog.MessageCode { get }
 
   /// Creates a new instance by decoding from the given decoder.
   ///
@@ -91,7 +91,7 @@ extension DecodableProtoEnum {
 
     if Kind(rawValue: rawValue) == nil {
       VertexLog.error(
-        code: unrecognizedValueMessageCode,
+        code: Self.unrecognizedValueMessageCode,
         """
         Unrecognized \(Self.self) with value "\(rawValue)":
         - Check for updates to the SDK as support for "\(rawValue)" may have been added; see \

FirebaseVertexAI/Sources/Safety.swift

@@ -52,36 +52,27 @@ public struct SafetyRating: Equatable, Hashable, Sendable {
     /// The probability is zero or close to zero.
     ///
     /// For benign content, the probability across all categories will be this value.
-    public static var negligible: HarmProbability {
-      return self.init(kind: .negligible)
-    }
+    public static let negligible = HarmProbability(kind: .negligible)
 
     /// The probability is small but non-zero.
-    public static var low: HarmProbability {
-      return self.init(kind: .low)
-    }
+    public static let low = HarmProbability(kind: .low)
 
     /// The probability is moderate.
-    public static var medium: HarmProbability {
-      return self.init(kind: .medium)
-    }
+    public static let medium = HarmProbability(kind: .medium)
 
     /// The probability is high.
     ///
     /// The content described is very likely harmful.
-    public static var high: HarmProbability {
-      return self.init(kind: .high)
-    }
+    public static let high = HarmProbability(kind: .high)
 
     /// Returns the raw string representation of the `HarmProbability` value.
     ///
     /// > Note: This value directly corresponds to the values in the [REST
     /// > API](https://cloud.google.com/vertex-ai/docs/reference/rest/v1beta1/GenerateContentResponse#SafetyRating).
     public let rawValue: String
 
-    var unrecognizedValueMessageCode: VertexLog.MessageCode {
-      .generateContentResponseUnrecognizedHarmProbability
-    }
+    static let unrecognizedValueMessageCode =
+      VertexLog.MessageCode.generateContentResponseUnrecognizedHarmProbability
   }
 }
 
@@ -100,29 +91,19 @@ public struct SafetySetting {
     }
 
     /// Content with `.negligible` will be allowed.
-    public static var blockLowAndAbove: HarmBlockThreshold {
-      return self.init(kind: .blockLowAndAbove)
-    }
+    public static let blockLowAndAbove = HarmBlockThreshold(kind: .blockLowAndAbove)
 
     /// Content with `.negligible` and `.low` will be allowed.
-    public static var blockMediumAndAbove: HarmBlockThreshold {
-      return self.init(kind: .blockMediumAndAbove)
-    }
+    public static let blockMediumAndAbove = HarmBlockThreshold(kind: .blockMediumAndAbove)
 
     /// Content with `.negligible`, `.low`, and `.medium` will be allowed.
-    public static var blockOnlyHigh: HarmBlockThreshold {
-      return self.init(kind: .blockOnlyHigh)
-    }
+    public static let blockOnlyHigh = HarmBlockThreshold(kind: .blockOnlyHigh)
 
     /// All content will be allowed.
-    public static var blockNone: HarmBlockThreshold {
-      return self.init(kind: .blockNone)
-    }
+    public static let blockNone = HarmBlockThreshold(kind: .blockNone)
 
     /// Turn off the safety filter.
-    public static var off: HarmBlockThreshold {
-      return self.init(kind: .off)
-    }
+    public static let off = HarmBlockThreshold(kind: .off)
 
     let rawValue: String
   }
@@ -156,39 +137,28 @@ public struct HarmCategory: CodableProtoEnum, Hashable, Sendable {
   }
 
   /// Harassment content.
-  public static var harassment: HarmCategory {
-    return self.init(kind: .harassment)
-  }
+  public static let harassment = HarmCategory(kind: .harassment)
 
   /// Negative or harmful comments targeting identity and/or protected attributes.
-  public static var hateSpeech: HarmCategory {
-    return self.init(kind: .hateSpeech)
-  }
+  public static let hateSpeech = HarmCategory(kind: .hateSpeech)
 
   /// Contains references to sexual acts or other lewd content.
-  public static var sexuallyExplicit: HarmCategory {
-    return self.init(kind: .sexuallyExplicit)
-  }
+  public static let sexuallyExplicit = HarmCategory(kind: .sexuallyExplicit)
 
   /// Promotes or enables access to harmful goods, services, or activities.
-  public static var dangerousContent: HarmCategory {
-    return self.init(kind: .dangerousContent)
-  }
+  public static let dangerousContent = HarmCategory(kind: .dangerousContent)
 
   /// Content that may be used to harm civic integrity.
-  public static var civicIntegrity: HarmCategory {
-    return self.init(kind: .civicIntegrity)
-  }
+  public static let civicIntegrity = HarmCategory(kind: .civicIntegrity)
 
   /// Returns the raw string representation of the `HarmCategory` value.
   ///
   /// > Note: This value directly corresponds to the values in the
   /// > [REST API](https://cloud.google.com/vertex-ai/docs/reference/rest/v1beta1/HarmCategory).
   public let rawValue: String
 
-  var unrecognizedValueMessageCode: VertexLog.MessageCode {
-    .generateContentResponseUnrecognizedHarmCategory
-  }
+  static let unrecognizedValueMessageCode =
+    VertexLog.MessageCode.generateContentResponseUnrecognizedHarmCategory
 }
 
 // MARK: - Codable Conformances