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gh-116126: Implement PEP 696 (#116129)

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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
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Jelle Zijlstra 2024-05-03 06:17:32 -07:00 • committed by GitHub
parent 852263e108
commit ca269e58c2
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28 changed files with 1924 additions and 623 deletions
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@ -647,21 +647,25 @@ type_params[asdl_type_param_seq*]: '[' t=type_param_seq ']' {
type_param_seq[asdl_type_param_seq*]: a[asdl_type_param_seq*]=','.type_param+ [','] { a }
type_param[type_param_ty] (memo):
| a=NAME b=[type_param_bound] { _PyAST_TypeVar(a->v.Name.id, b, EXTRA) }
| a=NAME b=[type_param_bound] c=[type_param_default] { _PyAST_TypeVar(a->v.Name.id, b, c, EXTRA) }
| '*' a=NAME colon=':' e=expression {
RAISE_SYNTAX_ERROR_STARTING_FROM(colon, e->kind == Tuple_kind
? "cannot use constraints with TypeVarTuple"
: "cannot use bound with TypeVarTuple")
}
| '*' a=NAME { _PyAST_TypeVarTuple(a->v.Name.id, EXTRA) }
| '*' a=NAME b=[type_param_starred_default] { _PyAST_TypeVarTuple(a->v.Name.id, b, EXTRA) }
| '**' a=NAME colon=':' e=expression {
RAISE_SYNTAX_ERROR_STARTING_FROM(colon, e->kind == Tuple_kind
? "cannot use constraints with ParamSpec"
: "cannot use bound with ParamSpec")
}
| '**' a=NAME { _PyAST_ParamSpec(a->v.Name.id, EXTRA) }
| '**' a=NAME b=[type_param_default] { _PyAST_ParamSpec(a->v.Name.id, b, EXTRA) }
type_param_bound[expr_ty]: ':' e=expression { e }
type_param_default[expr_ty]: '=' e=expression {
CHECK_VERSION(expr_ty, 13, "Type parameter defaults are", e) }
type_param_starred_default[expr_ty]: '=' e=star_expression {
CHECK_VERSION(expr_ty, 13, "Type parameter defaults are", e) }
# EXPRESSIONS
# -----------