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Add comptime modifier for variables/functions which only exist at compile-time #4588

Closed
Tracked by #4594
jfecher opened this issue Mar 19, 2024 · 0 comments · Fixed by #4840
Closed
Tracked by #4594

Add comptime modifier for variables/functions which only exist at compile-time #4588

jfecher opened this issue Mar 19, 2024 · 0 comments · Fixed by #4840
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enhancement New feature or request

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@jfecher
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jfecher commented Mar 19, 2024

Problem

Noir needs a comptime modifier to signal which functions/variables should be evaluated (only) at compile-time.

Happy Case

Add a comptime modifier to variables and functions.

Project Impact

None

Impact Context

No response

Workaround

None

Workaround Description

No response

Additional Context

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Would you like to submit a PR for this Issue?

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@jfecher jfecher added the enhancement New feature or request label Mar 19, 2024
github-merge-queue bot pushed a commit that referenced this issue Apr 19, 2024
# Description

## Problem\*

Resolves #4588

## Summary\*

Adds the `comptime` keyword which can be used around certain constructs:

- `comptime let foo = ...;` on local or global definitions
- `comptime if a { b } else { c }`
- `comptime for ... { ... }`
- `comptime { ... }`

This PR just adds these to parsing and forwards the new node types to
the frontend as necessary.

## Additional Context

The interpreter currently _does not_ handle these properly - this will
come in a separate PR. Eventually we want the interpreter to _only_
interpret comptime things where currently it interprets everything.

## Documentation\*

Check one:
- [ ] No documentation needed.
- [ ] Documentation included in this PR.
- [x] **[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.
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Labels
enhancement New feature or request
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