Add support for private methods. Most of the changes are in parser and compiler. The runtime checking of private functions was already present since #9692
# Important Notes
- Only top-level methods can be declared `private`.
- private method cannot be called from different project
- private method cannot be accessed from polyglot code (private method does not exist for polyglot code)
Closes#8836.
Atom constructors can be declared as private (project-private). project-private constructors can be called only from the same project. See the encapsulation.md docs for more info.
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Co-authored-by: Jaroslav Tulach <jaroslav.tulach@enso.org>
Co-authored-by: Radosław Waśko <radoslaw.wasko@enso.org>
Co-authored-by: Hubert Plociniczak <hubert.plociniczak@gmail.com>
Co-authored-by: Kaz Wesley <kaz@lambdaverse.org>
Adds the ability to declare a module as *private*. Modifies the parser to add the `private` keyword as a reserved keyword. All the checks for private modules are implemented as an independent *Compiler pass*. No checks are done at runtime.
# Important Notes
- Introduces new keyword - `private` - a reserved keyword.
- Modules that have `private` keyword as the first statement are declared as *private* (Project private)
- Public module cannot have private submodules and vice versa.
- This would require runtime access checks
- See #7088 for the specification.
