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Add ~P syntax to the formal grammar #422

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Add ~P syntax to the formal grammar #422

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491f49e
Add ~P syntax to grammar and an xref to the guide
amartini51 Dec 13, 2025
ebafcf5
Copy the change into the summary of the grammar
amartini51 Dec 13, 2025
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2 changes: 1 addition & 1 deletion TSPL.docc/ReferenceManual/SummaryOfTheGrammar.md
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Expand Up @@ -309,7 +309,7 @@ make the same change here also.
> Grammar of a type inheritance clause:
>
> *type-inheritance-clause* → **`:`** *type-inheritance-list* \
> *type-inheritance-list* → *attributes*_?_ *type-identifier* | *attributes*_?_ *type-identifier* **`,`** *type-inheritance-list*
> *type-inheritance-list* → *attributes*_?_ **`~`**_?_ *type-identifier* | *attributes*_?_ *type-identifier* **`,`** *type-inheritance-list*

## Expressions

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5 changes: 4 additions & 1 deletion TSPL.docc/ReferenceManual/Types.md
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Expand Up @@ -1337,6 +1337,9 @@ Protocol types can inherit from any number of other protocols.
When a protocol type inherits from other protocols,
the set of requirements from those other protocols are aggregated together,
and any type that inherits from the current protocol must conform to all of those requirements.
Writing a tilde (`~`) in front of a protocol name in this list
suppresses an implicit conformance to that protocol,
as described in <doc:Protocols#Implicit-Conformance-to-a-Protocol>.

A type inheritance clause in an enumeration definition can be either a list of protocols,
or in the case of an enumeration that assigns raw values to its cases,
Expand All @@ -1347,7 +1350,7 @@ to specify the type of its raw values, see <doc:Enumerations#Raw-Values>.
> Grammar of a type inheritance clause:
>
> *type-inheritance-clause* → **`:`** *type-inheritance-list* \
> *type-inheritance-list* → *attributes*_?_ *type-identifier* | *attributes*_?_ *type-identifier* **`,`** *type-inheritance-list*
> *type-inheritance-list* → *attributes*_?_ **`~`**_?_ *type-identifier* | *attributes*_?_ *type-identifier* **`,`** *type-inheritance-list*

## Type Inference

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