chore: cleans up nullable directives

src/Microsoft.OpenApi/Attributes/TrimmingAttributes.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
-#nullable enable
-
 // This collection of attribute definitions are helpers for accessing trim-related attributes in
 // projects targeting .NET 6 or lower. Since the trimmer queries for these attributes by name, having
 // these attributes source included is sufficient for the trimmer to recognize them. For more information
@@ -339,7 +337,7 @@
     /// bitwise combination of its member values.
     /// </summary>
     [Flags]
     internal enum DynamicallyAccessedMemberTypes
     {
         /// <summary>
         /// Specifies no members.

src/Microsoft.OpenApi/Extensions/OpenApiTypeMapper.cs

@@ -14,7 +14,6 @@
     /// </summary>
     public static class OpenApiTypeMapper
     {
-#nullable enable
         /// <summary>
         /// Maps a JsonSchema data type to an identifier.
         /// </summary>
@@ -75,8 +74,6 @@
             return schemaType.ToIdentifiersInternal().Single();
         }
 
-#nullable restore
-
         /// <summary>
         /// Converts a schema type's identifier into the enum equivalent
         /// </summary>
@@ -89,7 +86,7 @@
                 "null" => JsonSchemaType.Null,
                 "boolean" => JsonSchemaType.Boolean,
                 "integer" or "int" => JsonSchemaType.Integer,
                 "number" or "double" or "float" or "decimal"=> JsonSchemaType.Number,
                 "string" => JsonSchemaType.String,
                 "array" => JsonSchemaType.Array,
                 "object" => JsonSchemaType.Object,
@@ -122,14 +119,14 @@
         {
             [typeof(bool)] = () => new() { Type = JsonSchemaType.Boolean },
             [typeof(byte)] = () => new() { Type = JsonSchemaType.String, Format = "byte" },
             [typeof(int)] = () => new() { Type = JsonSchemaType.Integer, Format = "int32" },
             [typeof(uint)] = () => new() { Type = JsonSchemaType.Integer, Format = "int32" },
             [typeof(long)] = () => new() { Type = JsonSchemaType.Integer, Format = "int64" },
             [typeof(ulong)] = () => new() { Type = JsonSchemaType.Integer, Format = "int64" },
             [typeof(float)] = () => new() { Type = JsonSchemaType.Number, Format = "float" },
             [typeof(double)] = () => new() { Type = JsonSchemaType.Number, Format = "double" },
             [typeof(decimal)] = () => new() { Type = JsonSchemaType.Number, Format = "double" },
             [typeof(DateTime)] = () => new() { Type = JsonSchemaType.String, Format = "date-time" },
             [typeof(DateTimeOffset)] = () => new() { Type = JsonSchemaType.String, Format = "date-time" },
             [typeof(Guid)] = () => new() { Type = JsonSchemaType.String, Format = "uuid" },
             [typeof(char)] = () => new() { Type = JsonSchemaType.String },

src/Microsoft.OpenApi/Models/OpenApiComponents.cs

@@ -9,8 +9,6 @@
 using Microsoft.OpenApi.Models.References;
 using Microsoft.OpenApi.Writers;
 
-#nullable enable
-
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>

src/Microsoft.OpenApi/Models/OpenApiDocument.cs

@@ -17,8 +17,6 @@
 using Microsoft.OpenApi.Services;
 using Microsoft.OpenApi.Writers;
 
-#nullable enable
-
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>

src/Microsoft.OpenApi/Models/OpenApiMediaType.cs

@@ -10,8 +10,6 @@
 using Microsoft.OpenApi.Models.Interfaces;
 using Microsoft.OpenApi.Writers;
 
-#nullable enable
-
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>

src/Microsoft.OpenApi/Models/OpenApiOperation.cs

@@ -9,8 +9,6 @@
 using Microsoft.OpenApi.Models.References;
 using Microsoft.OpenApi.Writers;
 
-#nullable enable
-
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>

src/Microsoft.OpenApi/Models/OpenApiReference.cs

@@ -71,7 +71,7 @@
         /// <summary>
         /// The OpenApiDocument that is hosting the OpenApiReference instance. This is used to enable dereferencing the reference.
         /// </summary>
         public OpenApiDocument? HostDocument { get => hostDocument; init => hostDocument = value; }
 
         /// <summary>
         /// Gets the full reference string for v3.0.
@@ -281,10 +281,8 @@
             Utils.CheckArgumentNull(currentDocument);
             hostDocument ??= currentDocument;
         }
-        #nullable enable
         private static string? GetPropertyValueFromNode(JsonObject jsonObject, string key) =>
         jsonObject.TryGetPropertyValue(key, out var valueNode) && valueNode is JsonValue valueCast && valueCast.TryGetValue<string>(out var strValue) ? strValue : null;
-        #nullable restore
         internal void SetSummaryAndDescriptionFromMapNode(MapNode mapNode)
         {
             var (description, summary) = mapNode.JsonNode switch {

src/Microsoft.OpenApi/OpenApiTagComparer.cs

@@ -4,7 +4,6 @@
 
 namespace Microsoft.OpenApi;
 
-#nullable enable
 /// <summary>
 /// This comparer is used to maintain a globally unique list of tags encountered
 /// in a particular OpenAPI document.
@@ -44,4 +43,3 @@ public bool Equals(IOpenApiTag? x, IOpenApiTag? y)
     /// <inheritdoc/>
     public int GetHashCode(IOpenApiTag obj) => string.IsNullOrEmpty(obj?.Name) ? 0 : StringComparer.GetHashCode(obj!.Name);
 }
-#nullable restore

src/Microsoft.OpenApi/Services/OpenApiWalker.cs

@@ -130,7 +130,6 @@ internal void Walk(OpenApiExternalDocs? externalDocs)
 
             _visitor.Visit(externalDocs);
         }
-#nullable enable
         /// <summary>
         /// Visits <see cref="OpenApiComponents"/> and child objects
         /// </summary>
@@ -256,7 +255,6 @@ internal void Walk(OpenApiComponents? components)
             Walk(components as IOpenApiExtensible);
         }
 
-#nullable restore
         /// <summary>
         /// Visits <see cref="OpenApiPaths"/> and child objects
         /// </summary>

src/Microsoft.OpenApi/Services/OpenApiWorkspace.cs

@@ -61,7 +61,7 @@
         /// Registers a document's components into the workspace
         /// </summary>
         /// <param name="document"></param>
         public void RegisterComponents(OpenApiDocument document)
         {
             if (document?.Components == null) return;
 
@@ -281,7 +281,6 @@
             return _IOpenApiReferenceableRegistry.ContainsKey(key) || _artifactsRegistry.ContainsKey(key);
         }
 
-#nullable enable
         /// <summary>
         /// Resolves a reference given a key.
         /// </summary>
@@ -307,7 +306,6 @@
 
             return default;
         }
-#nullable restore
 
         private Uri? ToLocationUrl(string location)
         {

src/Microsoft.OpenApi/Writers/OpenApiWriterExtensions.cs

@@ -21,7 +21,7 @@
         /// <param name="writer">The writer.</param>
         /// <param name="name">The property name.</param>
         /// <param name="value">The property value.</param>
         public static void WriteProperty(this IOpenApiWriter writer, string name, string? value)
         {
             if (value == null)
             {
@@ -126,7 +126,6 @@
             writer.WriteValue(value);
         }
 
-#nullable enable
         /// <summary>
         /// Write the optional Open API object/element.
         /// </summary>
@@ -179,7 +178,6 @@
                 writer.WriteEndObject();
             }
         }
-#nullable restore
 
         /// <summary>
         /// Write the optional of collection string.
@@ -245,7 +243,7 @@
         /// <param name="name">The property name.</param>
         /// <param name="elements">The map values.</param>
         /// <param name="action">The map element writer action.</param>
         public static void WriteRequiredMap(
             this IOpenApiWriter writer,
             string name,
             IDictionary<string, string>? elements,