Metalama 2025.0.2-preview released

[prochan2]

We have released Metalama 2025.0.2-preview, based on 2025.0.1-preview and 2024.2.27.

New

• Support for .NET 9 RC 2 SDK and corresponding Roslyn 4.12.
• Support for Visual Studio 2022 17.12 Preview 4.
• Support for C# 13 (WIP)
  • Params collections
  • Ref/unsafe in iterators/async
  • Ref struct interfaces
  • Escape character
  • Method group natural type improvements
  • Lock object
  • Implicit indexer access in object initializers
  • Overload resolution priority
  • Partial properties
• Code model: ToDisplayString implemented for introduced declarations.
• Code model: Full support for types constructed from introduced types, e.g. if Foo is introduced, you can now use types List<Foo>, Foo<int>, Foo[], and so on.

Improved

• Code model: ToString overrides made consistent.
• Serialization: backward compatibility.
• New APIs to dynamically define a local variable

meta.DefineLocalVariable( string nameHint, IType type ) : IExpression
meta.DefineLocalVariable( string nameHint, IType type, dynamic? initializerExpression ) : IExpression
meta.DefineLocalVariable( string nameHint, IType type, IExpresson? initializerExpression ) : IExpression
meta.DefineLocalVariable( string nameHint, Type type ) : IExpression
meta.DefineLocalVariable( string nameHint, Type type, dynamic? initializerExpression ) : IExpression
meta.DefineLocalVariable( string nameHint, Type type, IExpresson? initializerExpression ) : IExpression
meta.DefineLocalVariable( string nameHint, dynamic? initializerExpression ) : IExpression
meta.DefineLocalVariable( string nameHint, IExpresson? initializerExpression ) : IExpression

• Some anomalies in the T# template compiler have been fixed.
• Report a warning when an aspect is used in in generated code.
• Added test options @Repeat(<int>) and @RandomSeed(<int>) to help reproducing random issues.
• Third-party dependencies have been updated.

Breaking Changes

• Casting a non-dynamic expression to IExpression no longer works. A call of ExpressionFactory.Capture(..) is required instead.

Fixed

• Base invoker targeting a declaration introduced in the same aspect is resolved to the introduced declaration.

[prochan2]

Visual Studio Tools for Metalama and PostSharp are available here.