Update the struct definitions to match version 3.14 of the LSP spec

Sources/LanguageServerProtocol/ClientCapabilities.swift

@@ -225,11 +225,23 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
 
     /// Capabilities specific to `SignatureInformation`.
     public struct SignatureInformation: Hashable, Codable {
+      public struct ParameterInformation: Hashable, Codable {
+        /// The client supports processing label offsets instead of a simple label string.
+        var labelOffsetSupport: Bool? = nil
+
+        public init(labelOffsetSupport: Bool? = nil) {
+          self.labelOffsetSupport = labelOffsetSupport
+        }
+      }
+
       /// Documentation formats supported by the client from most to least preferred.
-      public var signatureInformation: [MarkupKind]? = nil
+      public var documentationFormat: [MarkupKind]? = nil
+
+      public var parameterInformation: ParameterInformation? = nil
 
-      public init(signatureInformation: [MarkupKind]? = nil) {
-        self.signatureInformation = signatureInformation
+      public init(signatureInformation: [MarkupKind]? = nil, parameterInformation: ParameterInformation? = nil) {
+        self.documentationFormat = signatureInformation
+        self.parameterInformation = parameterInformation
       }
     }
 
@@ -276,6 +288,19 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
     }
   }
 
+  public struct DynamicRegistrationLinkSupportCapability: Hashable, Codable {
+    /// Whether the client supports dynamic registaration of this request.
+    public var dynamicRegistration: Bool? = nil
+
+    /// The client supports additional metadata in the form of declaration links.
+    public var linkSupport: Bool? = nil
+
+    public init(dynamicRegistration: Bool? = nil, linkSupport: Bool?) {
+      self.dynamicRegistration = dynamicRegistration
+      self.linkSupport = linkSupport
+    }
+  }
+
   /// Capabilities specific to the `textDocument/codeAction` request.
   public struct CodeAction: Hashable, Codable {
 
@@ -294,24 +319,38 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
         }
       }
 
-      /// Whether the client supports dynamic registaration of this request.
-      public var dynamicRegistration: Bool? = nil
-
       public var codeActionKind: CodeActionKind
 
-      public init(dynamicRegistration: Bool? = nil, codeActionKind: CodeActionKind) {
-        self.dynamicRegistration = dynamicRegistration
+      public init(codeActionKind: CodeActionKind) {
         self.codeActionKind = codeActionKind
       }
     }
 
+    /// Whether the client supports dynamic registaration of this request.
+    public var dynamicRegistration: Bool?
+
     public var codeActionLiteralSupport: CodeActionLiteralSupport? = nil
 
-    public init(codeActionLiteralSupport: CodeActionLiteralSupport? = nil) {
+    public init(dynamicRegistration: Bool? = nil, codeActionLiteralSupport: CodeActionLiteralSupport? = nil) {
       self.codeActionLiteralSupport = codeActionLiteralSupport
     }
   }
 
+  /// Capabilities specific to `textDocument/rename`.
+  public struct Rename: Hashable, Codable {
+
+    /// Whether the client supports dynamic registaration of this request.
+    public var dynamicRegistration: Bool?
+
+    /// The client supports testing for validity of rename operations before execution.
+    public var prepareSupport: Bool?
+
+    public init(dynamicRegistration: Bool? = nil, prepareSupport: Bool? = nil) {
+      self.dynamicRegistration = dynamicRegistration
+      self.prepareSupport = prepareSupport
+    }
+  }
+
   /// Capabilities specific to `textDocument/publishDiagnostics`.
   public struct PublishDiagnostics: Hashable, Codable {
     /// Whether the client accepts diagnostics with related information.
@@ -364,11 +403,13 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
 
   public var onTypeFormatting: DynamicRegistrationCapability? = nil
 
-  public var definition: DynamicRegistrationCapability? = nil
+  public var declaration: DynamicRegistrationLinkSupportCapability? = nil
+
+  public var definition: DynamicRegistrationLinkSupportCapability? = nil
 
-  public var typeDefinition: DynamicRegistrationCapability? = nil
+  public var typeDefinition: DynamicRegistrationLinkSupportCapability? = nil
 
-  public var implementation: DynamicRegistrationCapability? = nil
+  public var implementation: DynamicRegistrationLinkSupportCapability? = nil
 
   public var codeAction: CodeAction? = nil
 
@@ -384,13 +425,27 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
 
   public var foldingRange: FoldingRange? = nil
 
-  public init(synchronization: Synchronization? = nil, completion: Completion? = nil, hover: Hover? = nil,
-              signatureHelp: SignatureHelp? = nil, references: DynamicRegistrationCapability? = nil, documentHighlight: DynamicRegistrationCapability? = nil,
-              documentSymbol: DocumentSymbol? = nil, formatting: DynamicRegistrationCapability? = nil, rangeFormatting: DynamicRegistrationCapability? = nil,
-              onTypeFormatting: DynamicRegistrationCapability? = nil, definition: DynamicRegistrationCapability? = nil, typeDefinition: DynamicRegistrationCapability? = nil,
-              implementation: DynamicRegistrationCapability? = nil, codeAction: CodeAction? = nil, codeLens: DynamicRegistrationCapability? = nil,
-              documentLink: DynamicRegistrationCapability? = nil, colorProvider: DynamicRegistrationCapability? = nil, rename: DynamicRegistrationCapability? = nil,
-              publishDiagnostics: PublishDiagnostics? = nil, foldingRange: FoldingRange? = nil) {
+  public init(synchronization: Synchronization? = nil,
+              completion: Completion? = nil,
+              hover: Hover? = nil,
+              signatureHelp: SignatureHelp? = nil,
+              references: DynamicRegistrationCapability? = nil,
+              documentHighlight: DynamicRegistrationCapability? = nil,
+              documentSymbol: DocumentSymbol? = nil,
+              formatting: DynamicRegistrationCapability? = nil,
+              rangeFormatting: DynamicRegistrationCapability? = nil,
+              onTypeFormatting: DynamicRegistrationCapability? = nil,
+              declaration: DynamicRegistrationLinkSupportCapability? = nil,
+              definition: DynamicRegistrationLinkSupportCapability? = nil,
+              typeDefinition: DynamicRegistrationLinkSupportCapability? = nil,
+              implementation: DynamicRegistrationLinkSupportCapability? = nil,
+              codeAction: CodeAction? = nil,
+              codeLens: DynamicRegistrationCapability? = nil,
+              documentLink: DynamicRegistrationCapability? = nil,
+              colorProvider: DynamicRegistrationCapability? = nil,
+              rename: DynamicRegistrationCapability? = nil,
+              publishDiagnostics: PublishDiagnostics? = nil,
+              foldingRange: FoldingRange? = nil) {
     self.synchronization = synchronization
     self.completion = completion
     self.hover = hover
@@ -401,6 +456,7 @@ public struct TextDocumentClientCapabilities: Hashable, Codable {
     self.formatting = formatting
     self.rangeFormatting = rangeFormatting
     self.onTypeFormatting = onTypeFormatting
+    self.declaration = declaration
     self.definition = definition
     self.typeDefinition = typeDefinition
     self.implementation = implementation

Sources/LanguageServerProtocol/Completion.swift

@@ -32,14 +32,45 @@ public struct CompletionRequest: TextDocumentRequest, Hashable {
 
   public var position: Position
 
-  // public var context: CompletionContext?
+  public var context: CompletionContext?
 
   public init(textDocument: TextDocumentIdentifier, position: Position) {
     self.textDocument = textDocument
     self.position = position
   }
 }
 
+/// How a completion was triggered
+public struct CompletionTriggerKind: RawRepresentable, Codable, Hashable {
+  /// Completion was triggered by typing an identifier (24x7 code complete), manual invocation (e.g Ctrl+Space) or via API.
+  public static let invoked = CompletionTriggerKind(rawValue: 1)
+
+  /// Completion was triggered by a trigger character specified by the `triggerCharacters` properties of the `CompletionRegistrationOptions`.
+  public static let triggerCharacter = CompletionTriggerKind(rawValue: 2)
+
+  /// Completion was re-triggered as the current completion list is incomplete.
+  public static let triggerFromIncompleteCompletions = CompletionTriggerKind(rawValue: 3)
+
+  public let rawValue: Int
+  public init(rawValue: Int) {
+    self.rawValue = rawValue
+  }
+}
+
+/// Contains additional information about the context in which a completion request is triggered.
+public struct CompletionContext: Codable, Hashable {
+  /// How the completion was triggered.
+  public var triggerKind: CompletionTriggerKind
+
+  /// The trigger character (a single character) that has trigger code complete. Is undefined if `triggerKind !== CompletionTriggerKind.TriggerCharacter`
+  public var triggerCharacter: String?
+
+  public init(triggerKind: CompletionTriggerKind, triggerCharacter: String? = nil) {
+    self.triggerKind = triggerKind
+    self.triggerCharacter = triggerCharacter
+  }
+}
+
 /// List of completion items. If this list has been filtered already, the `isIncomplete` flag
 /// indicates that the client should re-query code-completions if the filter text changes.
 public struct CompletionList: ResponseType, Hashable {
@@ -56,4 +87,24 @@ public struct CompletionList: ResponseType, Hashable {
     self.isIncomplete = isIncomplete
     self.items = items
   }
+
+  public init(from decoder: Decoder) throws {
+    // Try decoding as CompletionList
+    do {
+      let container = try decoder.container(keyedBy: CodingKeys.self)
+      self.isIncomplete = try container.decode(Bool.self, forKey: .isIncomplete)
+      self.items = try container.decode([CompletionItem].self, forKey: .items)
+      return
+    } catch {}
+
+    // Try decoding as [CompletionItem]
+    do {
+      self.items = try [CompletionItem](from: decoder)
+      self.isIncomplete = false
+      return
+    } catch {}
+
+    let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Expected CompletionList or [CompletionItem]")
+    throw DecodingError.dataCorrupted(context)
+  }
 }

Sources/LanguageServerProtocol/CompletionItem.swift

@@ -16,9 +16,15 @@ public struct CompletionItem: Codable, Hashable {
   /// The display name of the completion.
   public var label: String
 
+  /// The kind of completion item - e.g. method, property.
+  public var kind: CompletionItemKind
+
   /// An extended human-readable name (longer than `label`, but simpler than `documentation`).
   public var detail: String?
 
+  /// A human-readable string that represents a doc-comment.
+  public var documentation: CompletionItemDocumentation?
+
   /// The name to use for sorting the result. If `nil`, use `label.
   public var sortText: String?
 
@@ -40,23 +46,19 @@ public struct CompletionItem: Codable, Hashable {
   /// The format of the `textEdit.nextText` or `insertText` value.
   public var insertTextFormat: InsertTextFormat?
 
-  /// The kind of completion item - e.g. method, property.
-  public var kind: CompletionItemKind
-
   /// Whether the completion is for a deprecated symbol.
   public var deprecated: Bool?
 
-  // TODO: remaining members
-
   public init(
     label: String,
+    kind: CompletionItemKind,
     detail: String? = nil,
+    documentation: CompletionItemDocumentation? = nil,
     sortText: String? = nil,
     filterText: String? = nil,
     textEdit: TextEdit? = nil,
     insertText: String? = nil,
     insertTextFormat: InsertTextFormat? = nil,
-    kind: CompletionItemKind,
     deprecated: Bool? = nil)
   {
     self.label = label
@@ -80,3 +82,30 @@ public enum InsertTextFormat: Int, Codable, Hashable {
   /// The text to insert is a "snippet", which may contain placeholders.
   case snippet = 2
 }
+
+public enum CompletionItemDocumentation: Hashable {
+  case string(String)
+  case markupContent(MarkupContent)
+}
+
+extension CompletionItemDocumentation: Codable {
+  public init(from decoder: Decoder) throws {
+    if let string = try? String(from: decoder) {
+      self = .string(string)
+    } else if let markupContent = try? MarkupContent(from: decoder) {
+      self = .markupContent(markupContent)
+    } else {
+      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Expected String or MarkupContent")
+      throw DecodingError.dataCorrupted(context)
+    }
+  }
+
+  public func encode(to encoder: Encoder) throws {
+    switch self {
+    case .string(let string):
+      try string.encode(to: encoder)
+    case .markupContent(let markupContent):
+      try markupContent.encode(to: encoder)
+    }
+  }
+}

Sources/LanguageServerProtocol/DefinitionRequest.swift

@@ -24,7 +24,7 @@
 /// - Returns: The location of the definition(s).
 public struct DefinitionRequest: TextDocumentRequest, Hashable {
   public static let method: String = "textDocument/definition"
-  public typealias Response = [Location]
+  public typealias Response = LocationsOrLocationLinksResponse?
 
   /// The document in which to lookup the symbol location.
   public var textDocument: TextDocumentIdentifier

Sources/LanguageServerProtocol/DocumentSymbol.swift

@@ -24,7 +24,7 @@
 /// - Returns: An array of document symbols, if any.
 public struct DocumentSymbolRequest: TextDocumentRequest, Hashable {
   public static let method: String = "textDocument/documentSymbol"
-  public typealias Response = [DocumentSymbol]?
+  public typealias Response = DocumentSymbolResponse?
 
   /// The document in which to lookup the symbol location.
   public var textDocument: TextDocumentIdentifier
@@ -34,6 +34,31 @@ public struct DocumentSymbolRequest: TextDocumentRequest, Hashable {
   }
 }
 
+public enum DocumentSymbolResponse: ResponseType, Hashable {
+  case documentSymbols([DocumentSymbol])
+  case symbolInformation([SymbolInformation])
+
+  public init(from decoder: Decoder) throws {
+    if let documentSymbols = try? [DocumentSymbol](from: decoder) {
+      self = .documentSymbols(documentSymbols)
+    } else if let symbolInformation = try? [SymbolInformation](from: decoder) {
+      self = .symbolInformation(symbolInformation)
+    } else {
+      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Expected [DocumentSymbol] or [SymbolInformation]")
+      throw DecodingError.dataCorrupted(context)
+    }
+  }
+
+  public func encode(to encoder: Encoder) throws {
+    switch self {
+    case .documentSymbols(let documentSymbols):
+      try documentSymbols.encode(to: encoder)
+    case .symbolInformation(let symbolInformation):
+      try symbolInformation.encode(to: encoder)
+    }
+  }
+}
+
 /// Represents programming constructs like variables, classes, interfaces etc. that appear 
 /// in a document. Document symbols can be hierarchical and they have two ranges: one that encloses
 /// its definition and one that points to its most interesting range, e.g. the range of an identifier.
@@ -70,12 +95,12 @@ public struct DocumentSymbol: Hashable, Codable, ResponseType {
 
   public init(
     name: String,
-    detail: String?, 
+    detail: String? = nil,
     kind: SymbolKind,
-    deprecated: Bool?,
+    deprecated: Bool? = nil,
     range: Range<Position>,
     selectionRange: Range<Position>,
-    children: [DocumentSymbol]?)
+    children: [DocumentSymbol]? = nil)
   {
     self.name = name
     self.detail = detail

Sources/LanguageServerProtocol/Hover.swift

@@ -78,7 +78,7 @@ extension MarkedString: Codable {
     } else if let codeBlock = try? MarkdownCodeBlock(from: decoder) {
       self = .codeBlock(language: codeBlock.language, value: codeBlock.value)
     } else {
-      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "MarkedString is neither pure string nor code block")
+      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Expected String or MarkdownCodeBlock")
       throw DecodingError.dataCorrupted(context)
     }
   }
@@ -104,7 +104,7 @@ extension HoverResponseContents: Codable {
     } else if let value = try? MarkupContent(from: decoder) {
       self = .markupContent(value)
     } else {
-      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "HoverResponseContents is neither MarkedString, nor [MarkedString], nor MarkupContent")
+      let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Expected MarkedString, [MarkedString], or MarkupContent")
       throw DecodingError.dataCorrupted(context)
     }
   }

Sources/LanguageServerProtocol/ImplementationRequest.swift

@@ -25,7 +25,7 @@
 ///            protocol conforming types, subclasses, or overrides.
 public struct ImplementationRequest: TextDocumentRequest, Hashable {
   public static let method: String = "textDocument/implementation"
-  public typealias Response = [Location]
+  public typealias Response = LocationsOrLocationLinksResponse?
 
   /// The document in which the given symbol is located.
   public var textDocument: TextDocumentIdentifier