enable nullable annotations for semantic versions (#837)

1 files changed, 15 insertions, 16 deletions

diff --git a/src/SMAPI/SemanticVersion.cs b/src/SMAPI/SemanticVersion.cs
index 4e484633..7a6cdcdd 100644
--- a/src/SMAPI/SemanticVersion.cs
+++ b/src/SMAPI/SemanticVersion.cs
@@ -1,6 +1,5 @@
-#nullable disable
-
 using System;
+using System.Diagnostics.CodeAnalysis;
 using Newtonsoft.Json;
 
 namespace StardewModdingAPI
@@ -28,10 +27,10 @@ namespace StardewModdingAPI
         public int PatchVersion => this.Version.PatchVersion;
 
         /// <inheritdoc />
-        public string PrereleaseTag => this.Version.PrereleaseTag;
+        public string? PrereleaseTag => this.Version.PrereleaseTag;
 
         /// <inheritdoc />
-        public string BuildMetadata => this.Version.BuildMetadata;
+        public string? BuildMetadata => this.Version.BuildMetadata;
 
 
         /*********
@@ -43,7 +42,7 @@ namespace StardewModdingAPI
         /// <param name="patchVersion">The patch version for backwards-compatible bug fixes.</param>
         /// <param name="prereleaseTag">An optional prerelease tag.</param>
         /// <param name="buildMetadata">Optional build metadata. This is ignored when determining version precedence.</param>
-        public SemanticVersion(int majorVersion, int minorVersion, int patchVersion, string prereleaseTag = null, string buildMetadata = null)
+        public SemanticVersion(int majorVersion, int minorVersion, int patchVersion, string? prereleaseTag = null, string? buildMetadata = null)
             : this(majorVersion, minorVersion, patchVersion, 0, prereleaseTag, buildMetadata) { }
 
         /// <summary>Construct an instance.</summary>
@@ -54,7 +53,7 @@ namespace StardewModdingAPI
         /// <param name="platformRelease">The platform-specific version (if applicable).</param>
         /// <param name="buildMetadata">Optional build metadata. This is ignored when determining version precedence.</param>
         [JsonConstructor]
-        internal SemanticVersion(int majorVersion, int minorVersion, int patchVersion, int platformRelease, string prereleaseTag = null, string buildMetadata = null)
+        internal SemanticVersion(int majorVersion, int minorVersion, int patchVersion, int platformRelease, string? prereleaseTag = null, string? buildMetadata = null)
             : this(new Toolkit.SemanticVersion(majorVersion, minorVersion, patchVersion, platformRelease, prereleaseTag, buildMetadata)) { }
 
         /// <summary>Construct an instance.</summary>
@@ -93,49 +92,49 @@ namespace StardewModdingAPI
 
         /// <inheritdoc />
         /// <remarks>The implementation is defined by Semantic Version 2.0 (https://semver.org/).</remarks>
-        public int CompareTo(ISemanticVersion other)
+        public int CompareTo(ISemanticVersion? other)
         {
             return this.Version.CompareTo(other);
         }
 
         /// <inheritdoc />
-        public bool IsOlderThan(ISemanticVersion other)
+        public bool IsOlderThan(ISemanticVersion? other)
         {
             return this.Version.IsOlderThan(other);
         }
 
         /// <inheritdoc />
-        public bool IsOlderThan(string other)
+        public bool IsOlderThan(string? other)
         {
             return this.Version.IsOlderThan(other);
         }
 
         /// <inheritdoc />
-        public bool IsNewerThan(ISemanticVersion other)
+        public bool IsNewerThan(ISemanticVersion? other)
         {
             return this.Version.IsNewerThan(other);
         }
 
         /// <inheritdoc />
-        public bool IsNewerThan(string other)
+        public bool IsNewerThan(string? other)
         {
             return this.Version.IsNewerThan(other);
         }
 
         /// <inheritdoc />
-        public bool IsBetween(ISemanticVersion min, ISemanticVersion max)
+        public bool IsBetween(ISemanticVersion? min, ISemanticVersion? max)
         {
             return this.Version.IsBetween(min, max);
         }
 
         /// <inheritdoc />
-        public bool IsBetween(string min, string max)
+        public bool IsBetween(string? min, string? max)
         {
             return this.Version.IsBetween(min, max);
         }
 
         /// <inheritdoc />
-        public bool Equals(ISemanticVersion other)
+        public bool Equals(ISemanticVersion? other)
         {
             return other != null && this.CompareTo(other) == 0;
         }
@@ -156,9 +155,9 @@ namespace StardewModdingAPI
         /// <param name="version">The version string.</param>
         /// <param name="parsed">The parsed representation.</param>
         /// <returns>Returns whether parsing the version succeeded.</returns>
-        public static bool TryParse(string version, out ISemanticVersion parsed)
+        public static bool TryParse(string version, [NotNullWhen(true)] out ISemanticVersion? parsed)
         {
-            if (Toolkit.SemanticVersion.TryParse(version, out ISemanticVersion versionImpl))
+            if (Toolkit.SemanticVersion.TryParse(version, out ISemanticVersion? versionImpl))
             {
                 parsed = new SemanticVersion(versionImpl);
                 return true;