Metalama 2024.2.4-preview released

[gfraiteur]

We have just released Metalama 2024.2.4-preview, including all changes from 2024.2.3-preview and 2024.1.17 plus the following:

New

• Added support for lambda statements and anonymous methods of known scope, i.e. either run-time or compile-time (the scope can be coerced using meta.RunTime or meta.CompileTime when it is not obvious from the context). Lambda expressions returning dynamic are not supported and won't be. Single-statement lambdas (e.g. () => { return 0; } are transparently simplified into expression lambdas (e.g. () => 0).
• New class Promise<T> and interfaces IPromise<T> and IPromise to represent results that are not available yet. This mechanism allows resolving chicken-or-egg issues when introducing members when a template must receive a reference to a declaration that has not been introduced yet. A Promise<T> can be passed as an argument to a template, which receives it on a parameter of type T.
• New method IMethodInvoker.CreateInvokeExpression generating an IExpression that represents a method invocation. It can be called outside of a template context.

Updated

• Metalama.Patterns.Observability, containing an [Observable] aspect implementing INotifyPropertyChanged has been refactor and is now in almost final state.

Improved in code formatting

• Where applicable, redundancies in member access expressions are eliminated (e.g., this.X or MyType.Y becomes X or Y).
• Non-extension calls to extension methods in templates are transformed into extension calls. This is useful because extension methods cannot be called on dynamic types. For instance, the C# code LoggerExtensions.LogInformation( meta.This._logger, "Hello" ) would compile to _logger.LogInformation( "Hello" ).
• The discard parameter _, when used in templates, is no longer renamed to __1, __2 and so on.
• The performance of whole-project output code formatting has been improved. Note that code formatting is disabled by default so it should not affect your standard builds, but LamaDebug builds should be faster.