What's Changed

Feature: Add interface IFormattingExtensionsToggle to skip formatting (#436)

• Added the IFormattingExtensionsToggle interface to allow skipping formatting by IFormatter extensions.
• This interface is primarily used by ISource extensions that receive it with the ISelectorInfo parameter.
• By setting IFormattingExtensionsToggle.DisableFormattingExtensions to true, formatting can be skipped. This can be useful when the ISource found a value in ISource.TryEvaluateSelector where default formatting cannot reasonably be done.

Security: Update of System.Text.Json (#435)

• Bumped System.Text.Json to v8.0.4
• Fixed a vulnerability in .NET when calling the JsonSerializer.DeserializeAsyncEnumerable method against an untrusted input using System.Text.Json, which could result in Denial of Service.

Feature: Implement ISpanFormattable for DefaultFormatter (#434)

• Implemented ISpanFormattable for DefaultFormatter
• ISpanFormattable is 5% faster than IFormattable, with 24% less allocations

   // Performance test case
   Smart.FormatInto(output, null, _placeholder0005Format, 1234567.890123f, 1234567.890123f, 1234567.890123f, 1234567.890123f, 1234567.890123f);

   BenchmarkDotNet v0.13.12, Windows 11 (10.0.22631.3737/23H2/2023Update/SunValley3)
   13th Gen Intel Core i7-13700K, 1 CPU, 24 logical and 16 physical cores
   .NET SDK 8.0.302
     [Host]   : .NET 8.0.6 (8.0.624.26715), X64 RyuJIT AVX2
     .NET 8.0 : .NET 8.0.6 (8.0.624.26715), X64 RyuJIT AVX2
  
   Job=.NET 8.0  Runtime=.NET 8.0
  
   | Method                   | N     | Mean          | Error       | StdDev      | Ratio | RatioSD | Gen0       | Allocated    | Alloc Ratio |
   |------------------------- |------ |--------------:|------------:|------------:|------:|--------:|-----------:|-------------:|------------:|
   | ISpanFormattable         | 100   |     74.502 us |   0.3693 us |   0.3273 us |  8.52 |    0.05 |     4.0283 |      62.5 KB |        2.76 |
   | IFormattable             | 100   |     77.927 us |   0.5760 us |   0.5388 us |  8.91 |    0.07 |     5.2490 |      82.0 KB |        3.62 |
  

Feature: ReflectionSource (#426)

• Made ReflectionSource.TypeCache static for better performance.
• If the static cache has undesired effects on your code logic, consider to disable the cache (ReflectionSource.IsTypeCacheEnabled = false).
• Implemented a mechanism to control the size of ReflectionSource.TypeCache and remove the oldest item first.

Enhancement: DictionarySource (#426)

• Dynamics in DictionarySource now use case-sensitivity setting
• Cache for IReadOnlyDictionary now has instance scope

Refactor: Split off classes Registry and Evaluator from SmartFormatter (#424)

SmartFormatter

• Separated members for handling ISource and IFormatter extensions into internal class Registry
• Separated members for evaluating formats into internal class Evaluator
• Existing members of SmartFormatter remain unchanged and are not yet marked as obsolete

ZCharArray

• Added a lightweight, thread-safe container that rents a buffer from an ArrayPool<char> and returns it when disposed
• Simplifies passing around the buffer without intermediate memory allocations
• ZCharArray contains most frequently used methods for writing data into the underlying buffer
• Used in FormattingInfo methods (see below) for low memory allocation

FormattingInfo

Added methods useful in custom IFormatters:

• public ZCharArray FormattingInfo.FormatAsSpan(IFormatProvider, Format, object?): Works like SmartFormatter.Format(...) for the specified Format
• public ZCharArray FormattingInfo.FormatAsSpan(IFormatProvider, Placeholder, object?): Gets the value for the Placeholder and applies its Format
• public bool TryGetValue(Placeholder, out object?): Tries to get the value for a Placeholder

Evaluator

• Internal class that supplies the methods for evaluating Placeholder and Format objects
• Contains the methods that FormattingInfo uses to evaluate Placeholder and Format objects
• Has other methods formerly included in SmartFormatter that are now moved to Evaluator
• Includes a partial class for handling events in all steps of the evaluation process

Registry

• Internal class that contains all methods for handling ISource and IFormatter extensions that have been moved from SmartFormatter

Feature: Format.HasNested checks for existing Placeholder in Items (#416)

• Added Format.HasNested property that checks Items for existing Placeholder

Test: Add unit test for nested scope (#404)

• Added unit test for nested scope

Enhancement: Ensure Format instances get returned to object pool (#402)

• Ensured that Format instances get returned to object pool

Refactor: Internal SmartFormat.Pooling classes (#401)

• Simplified pooling classes and made methods and names more consistent

Chore: Remove unused performance test projects (#398)

• Removed unused performance test projects

Fix: Returning a StringBuilder exceeding default capacity to StringBuilderPool (#397)

• Fixed an issue where returning a StringBuilder exceeding the default capacity to StringBuilderPool would throw an exception.

Refactor: Remove code duplications in SmartFormatter (#396)

• Removed code duplications in SmartFormatter
• Unified preprocessor directives

Chore: Remove redundant DependsOnTargets from SmartFormat.csproj (#394)

• Removed redundant DependsOnTargets from SmartFormat.csproj

Full Changelog: v3.4.0...v3.5.0