Static trait method references lead to a compiler panic #3773
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jfecher
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Dec 13, 2023
# Description ## Problem\* Resolves #3773 Part of #2568 ## Summary\* This PR implements the ability to be able to call trait methods such as `Default::default()` where previously we required `StructName::default()`. The specific impl is selected via type inference. Previously, this resulted in a compiler panic. ## Additional Context When a trait method's type isn't constrained enough or is otherwise still ambiguous after type inference, the compiler currently just selects the first trait implementation that matches. E.g. `let _ = Default::default();`. This is a separate issue, so I'll create a new issue for this. ## Documentation\* Check one: - [ ] No documentation needed. - [ ] Documentation included in this PR. - [x] **[Exceptional Case]** Documentation to be submitted in a separate PR. - I think traits are finally stable enough to start writing documentation for. I'm going to submit another PR to remove some of the experimental warnings the compiler has for traits, and with it add documentation for traits as well. This wouldn't stabilize all trait features (e.g. associated types are still unimplemented), but users will now be able to use basic traits with functions without warnings. Any unimplemented trait items (associated types again) will not be included in the documentation. # 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: kevaundray <kevtheappdev@gmail.com>
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Aim
Referencing a trait method via the trait name, rather than a struct name. E.g.
Default::default()instead ofMyStruct::default().Expected Behavior
Identical behavior to
MyStruct::default()except with the impl being selected via type inference rather than the struct name.Bug
Compiler panic that Default::default() does not have a
FuncMetastored in the NodeInterner.To Reproduce
Installation Method
None
Nargo Version
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Additional Context
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Would you like to submit a PR for this Issue?
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