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GenericArgsBinding doesn't account for GATs #1380

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lowr opened this issue Jul 11, 2023 · 5 comments
Closed

GenericArgsBinding doesn't account for GATs #1380

lowr opened this issue Jul 11, 2023 · 5 comments
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A-grammar Area: Syntax and parsing

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@lowr
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lowr commented Jul 11, 2023

Currently, GenericArgsBinding is defined as follows (link):

GenericArgsBinding :
   IDENTIFIER = Type

This definition does not account for GATs. It should include optional generic arguments after the identifier.

@ehuss
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ehuss commented Jul 11, 2023

Is there a stable way to actually use that?

@lowr
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lowr commented Jul 11, 2023

The following code compiles on stable and Assoc<i32> = () part is an example of GenericArgsBinding with a generic argument if I'm not mistaken?

trait Trait {
    type Assoc<T>;
}

fn foo<T>(_: T)
where
    T: Trait<Assoc<i32> = ()>
{}

(playground)

@ehuss
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ehuss commented Jul 11, 2023

Yep, thanks!

@ehuss ehuss added the A-grammar Area: Syntax and parsing label Jul 11, 2023
@SabrinaJewson
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Should this be closed? It seems to account for GATs now

@ehuss
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ehuss commented Sep 30, 2024

Yes, thanks! Resolved by #1481.

@ehuss ehuss closed this as completed Sep 30, 2024
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Labels
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