add Guid.TryFormat

SimonCropp · Feb 13, 2024 · e888eae · e888eae
1 parent c0f41c6
commit e888eae
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Showing 2 changed files with 30 additions and 0 deletions.
diff --git a/src/Polyfill/Polyfill_TryFormat.cs b/src/Polyfill/Polyfill_TryFormat.cs
@@ -31,6 +31,25 @@ public static bool TryFormat(this TimeSpan target, Span<char> destination, out i
 
         return CopyToSpan(destination, out charsWritten, result);
     }
+    /// <summary>
+    /// Tries to format the value of the current instance as UTF-8 into the provided span of bytes.
+    /// </summary>
+    [Link("https://learn.microsoft.com/en-us/dotnet/api/system.guid.tryformat#system-guid-tryformat(system-span((system-char))-system-int32@-system-readonlyspan((system-char)))")]
+    public static bool TryFormat(this Guid target, Span<char> destination, out int charsWritten, ReadOnlySpan<char> format = default)
+    {
+        string result;
+
+        if (format.Length == 0)
+        {
+            result = target.ToString(null);
+        }
+        else
+        {
+            result = target.ToString(format.ToString());
+        }
+
+        return CopyToSpan(destination, out charsWritten, result);
+    }
 
     /// <summary>
     /// Tries to format the value of the current instance into the provided span of characters.

diff --git a/src/Tests/PolyfillTests_TryFormat.cs b/src/Tests/PolyfillTests_TryFormat.cs
@@ -101,6 +101,17 @@ public void TryFormatSingle()
         Assert.AreEqual(buffer.Length, written);
     }
 
+    [Test]
+    public void TryFormatGuid()
+    {
+        var value = new Guid("97008c2d-2114-4396-ae19-392c8e6f8f1b");
+        Span<char> buffer = stackalloc char[36];
+        var result = value.TryFormat(buffer, out var written);
+        Assert.True(result);
+        Assert.AreEqual("97008c2d-2114-4396-ae19-392c8e6f8f1b", buffer.ToString());
+        Assert.AreEqual(buffer.Length, written);
+    }
+
     [Test]
     public void TryFormatDouble()
     {