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Fix the grammar of generic arguments #2247

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Fix the grammar of generic arguments #2247

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b217e61
Fix the grammar of generic arguments in expressions and patterns
fmease May 2, 2026
3496d7e
Admit turbofish and path-segment keywords in associated item constraints
fmease May 5, 2026
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20 changes: 11 additions & 9 deletions src/paths.md
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Original file line number Diff line number Diff line change
Expand Up @@ -52,8 +52,14 @@ PathIdentSegment ->
IDENTIFIER | `super` | `self` | `Self` | `crate` | `$crate`

GenericArgs ->
`<` `>`
| `<` ( GenericArg `,` )* GenericArg `,`? `>`
`<` GenericArgList? `>`
| `(` TypeList? `)` (`->` TypeNoBounds)?

GenericArgList ->
( GenericArg `,` )* GenericArg `,`?

TypeList ->
( Type `,` )* Type `,`?

GenericArg ->
Lifetime | Type | GenericArgsConst | GenericArgsBinding | GenericArgsBounds
Expand All @@ -65,10 +71,10 @@ GenericArgsConst ->
| SimplePathSegment

GenericArgsBinding ->
IDENTIFIER GenericArgs? `=` Type
TypePathSegment `=` Type

GenericArgsBounds ->
IDENTIFIER GenericArgs? `:` Bounds
TypePathSegment `:` Bounds
```

r[paths.expr.intro]
Expand Down Expand Up @@ -154,11 +160,7 @@ r[paths.type.syntax]
```grammar,paths
TypePath -> `::`? TypePathSegment (`::` TypePathSegment)*

TypePathSegment -> PathIdentSegment (`::`? (GenericArgs | TypePathFn))?

TypePathFn -> `(` TypePathFnInputs? `)` (`->` TypeNoBounds)?

TypePathFnInputs -> Type (`,` Type)* `,`?
TypePathSegment -> PathIdentSegment (`::`? GenericArgs)?
```

r[paths.type.intro]
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