Remove the SinglePipeDefinition Syntax

[georg-schwarz]

Right now, we have two syntaxes to do the same thing.
I feel this leads to unnecessary complexity.
I suggest to remove the verbose SinglePipeDefinition syntax in favor of the ChainedPipeDefinition syntax using arrows.

[joluj]

Why did you remove the generic? astNode can be narrowed down with the generic.

export class PipeWrapper<T extends PipeDefinition | BlocktypePipeline>
 implements AstNodeWrapper<T> { ... }

Current State:

declare const pipeline: BlocktypePipeline;
const wrapper = new PipeWrapper(pipeline, 29);
const node = wrapper.astNode; // <- typed as 'PipeDefinition | BlocktypePipeline' instead of 'BlocktypePipeline'

[joluj]

@georg-schwarz

• I had to add a default type to prevent having to update the type in several places.
• I had to remove the improved typing of getToDiagnostic and getFromDiagnostic since the types went wild in ValidationContext and langium's ValidationAcceptor

[georg-schwarz]

Awesome! Thx for cleaning up my mess @joluj :-)