[Feature] Implement new translation target for JavaScript

[Luna-Klatzer]

Is there an existing proposal for this?

• I have searched the existing issues

This feature does not exist in the latest version

• I am using the latest version

Proposal

Add a new optional language target and translation classes for JavaScript, which should support all current and future Kipper features, like the default TypeScript target.

Exact behaviour / changes you want

• Add new target JavaScriptTarget, which should use the following new classes to implement the generation of JavaScript (Should compile to ES7/ES2016) code:
  • JavaScriptTargetSemanticAnalyser
  • JavaScriptTargetBuiltInGenerator
  • JavaScriptTargetCodeGenerator
• Implement semantic analysis specifically for the JavaScript target.
• Make the existing TypeScriptTarget and its implementation classes inherit from the new JavaScriptTarget and its new classes, to allow the re-use of code and reduce the size of the source code. Since the syntax of both languages is already almost identical and the only difference being that TypeScript extends JavaScript with more advanced feature sets, it should not require a lot of work to implement this change.

[Luna-Klatzer]

When this is implemented, the targets will likely be split into two separate packages:

• @kipper/target-js
• @kipper/target-ts

Per default though, JavaScript should be a direct dependency of @kipper/core, so that it always translates to native JavaScript and not TypeScript, unless explicitly configured so, as that requires additional transpiling and more dependencies that the user might not even need.

[Luna-Klatzer]

This should be implemented with #86

[Luna-Klatzer]

Implemented with #279 and released in v0.10.0-alpha.3