Added Append(Guid) overload

Author: linkdotnet

CHANGELOG.md

@@ -9,6 +9,7 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 ### Added
 
 - `ToString(startIndex, length)` to get a substring from the builder
+- `Append(Guid guid)` as new overload
 
 ## [1.6.2] - 2022-11-11
 

src/LinkDotNet.StringBuilder/ValueStringBuilder.Append.cs

@@ -74,6 +74,13 @@ public ref partial struct ValueStringBuilder
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public void Append(decimal value) => AppendSpanFormattable(value);
 
+    /// <summary>
+    /// Appends the string representation of the Guid to the builder.
+    /// </summary>
+    /// <param name="value">Guid to add.</param>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public void Append(Guid value) => AppendSpanFormattable(value, "D");
+
     /// <summary>
     /// Appends a string to the string builder.
     /// </summary>
@@ -112,11 +119,11 @@ public void AppendLine(scoped ReadOnlySpan<char> str)
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private void AppendSpanFormattable<T>(T value)
+    private void AppendSpanFormattable<T>(T value, ReadOnlySpan<char> format = default)
         where T : ISpanFormattable
     {
-        Span<char> tempBuffer = stackalloc char[24];
-        if (value.TryFormat(tempBuffer, out var written, default, null))
+        Span<char> tempBuffer = stackalloc char[36];
+        if (value.TryFormat(tempBuffer, out var written, format, null))
         {
             var newSize = written + bufferPosition;
             if (newSize >= buffer.Length)

tests/LinkDotNet.StringBuilder.UnitTests/ValueStringBuilder.Append.Tests.cs

@@ -201,4 +201,14 @@ public void ShouldAppendMultipleDoubles()
 
         builder.ToString().Should().Be("0.33333333333333330.33333333333333330.3333333333333333");
     }
+
+    [Fact]
+    public void ShouldAppendGuid()
+    {
+        using var builder = new ValueStringBuilder();
+
+        builder.Append(Guid.Empty);
+
+        builder.ToString().Should().Be("00000000-0000-0000-0000-000000000000");
+    }
 }