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Epic: Add visibility system to hide implementation details internal to modules #4515

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TomAFrench opened this issue Mar 8, 2024 · 1 comment
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enhancement New feature or request tracking Tracking issues
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@TomAFrench
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TomAFrench commented Mar 8, 2024

Problem

Currently all types/values defined in Noir are public, this causes an issue where libraries cannot provide a restricted interface as users can reach in an import internal implementation details.

Happy Case

Noir should have a visibility system similar to Rust where by default functions, globals, traits, etc. are private to the modules they're defined in.

Tasks

  1. enhancement
  2. enhancement
@TomAFrench TomAFrench added the enhancement New feature or request label Mar 8, 2024
@github-project-automation github-project-automation bot moved this to 📋 Backlog in Noir Mar 8, 2024
@TomAFrench TomAFrench moved this from 📋 Backlog to 🏗 In progress in Noir Mar 8, 2024
@TomAFrench TomAFrench moved this from 🏗 In progress to 📋 Backlog in Noir Apr 8, 2024
@TomAFrench TomAFrench changed the title Add visibility modifiers to all items to prevent dependants from importing Epic: Add visibility system to hide implementation details internal to modules Apr 16, 2024
@TomAFrench TomAFrench added the tracking Tracking issues label Apr 16, 2024
@TomAFrench TomAFrench removed their assignment Apr 20, 2024
@asterite asterite mentioned this issue Aug 29, 2024
5 tasks
github-merge-queue bot pushed a commit that referenced this issue Sep 2, 2024
# Description

## Problem

Part of #4515

## Summary

We recently added a warning for unused imports... but only for bin and
contract packages. We didn't enable it for lib packages because a `use`
could also be used as `pub use`, something we don't have yet. I thought
it would be really nice if we had `pub use`, and warned on unused
imports in libs too. I checked the code and we already track visibility
for any item, in general, it's just that for things that don't allow a
visibility modifier we just consider it's public. So I tried to see how
difficult it would be to implement it, and it turned out it wasn't that
hard or time-consuming.

That said, visibility for `use` involves some more logic, particularly
for autocompletion, because now `pub use` should be suggested, but the
"parent" module of that item isn't the actual parent (it's the module
where the `pub use` is defined) but that was relatively striaght-forward
to implement too.

## Additional Context

If we decide to go forward with this, any existing `use` that was used
as `pub use` will likely start producing a warning for libs (a lot of
them in Aztec-Packages), but now that can be silenced by changing them
to `pub use`.

Where should this new feature be documented? I'm not sure if it should
go in `dependencies.md` or `modules.md`.

## Documentation\*

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <[email protected]>
github-merge-queue bot pushed a commit that referenced this issue Sep 17, 2024
# Description

## Problem

Part of #4515
Part of #4775

## Summary

Allows marking structs as pub or pub(crate). Also will now report unused
structs.

## Additional Context

Let me know if some of the structs I marked as `pub` shouldn't actually
be `pub`. I didn't mark some as pub, I think only the ones used for
tests.

## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.
github-merge-queue bot pushed a commit that referenced this issue Sep 17, 2024
# Description

## Problem

Part of #4515
Fixes #4775

## Summary

Traits can now be marked as `pub` or `pub(crate)`, and a warning will
happen if a trait is unused.

## Additional Context

## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.
github-merge-queue bot pushed a commit that referenced this issue Sep 25, 2024
# Description

## Problem

Part of #4515

## Summary

## Additional Context

## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <[email protected]>
github-merge-queue bot pushed a commit that referenced this issue Sep 26, 2024
# Description

## Problem

Part of #4515

## Summary

## Additional Context

I left all of the stdlib globals as private except one which needed to
be `pub(crate)` to avoid a warning. I don't know if some of these
globals should actually be public.

## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <[email protected]>
github-merge-queue bot pushed a commit that referenced this issue Sep 27, 2024
# Description

## Problem

Part of #4515

## Summary

## Additional Context

I made most of the stdlib modules public. These are all except the test
modules and some modules that I thought were just implementation details
of some other modules.

I'm adding very short documentation for each of these. I'm thinking that
once we get all visibility done it should be documented in its own
section, with examples.

## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <[email protected]>
@TomAFrench TomAFrench added this to the 1.0 milestone Oct 2, 2024
github-merge-queue bot pushed a commit that referenced this issue Oct 3, 2024
# Description

## Problem

Part of #4515

## Summary

~After searching for a while I found that to make this work we only
needed to change one line~

## Additional Context

I didn't include tests for now, but I'll add them later because we first
need to figure out which `impl` functions should be marked as `pub` or
`pub(crate)` in the stdlib. I'm not familiar with the stdlib though I
probably can't do it. That said, if you open the standard library with a
nargo compiled from this PR you already get some warnings, so those
functions should at least not be private.


## Documentation

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <[email protected]>
github-merge-queue bot pushed a commit that referenced this issue Oct 9, 2024
# Description

## Problem

Resolves #4837

Part of #4515

## Summary

This checks struct visibility in member access, constructors and
patterns.

## Additional Context

Private fields are still suggested in LSP. I plan to hide those fields
in a follow-up PR.


## Documentation

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.
github-merge-queue bot pushed a commit that referenced this issue Oct 9, 2024
# Description

## Problem

Part of #4515

Apparently in #6179 I only made it work for calls like `foo::Bar::baz()`
but no checks were done for method calls (where `self` is involved).

## Summary

This PR now warns when calling private or `pub(crate)` methods, either
on structs or primitive types, when they are not accessible from the
current module.

We also now don't suggest non-accessible methods from LSP.

## Additional Context


I also removed an unused global that was introduced some time ago.

## Documentation

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.
@Savio-Sou
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