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gh-103763: Implement PEP 695 (#103764)

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This implements PEP 695, Type Parameter Syntax. It adds support for:

- Generic functions (def func[T](): ...)
- Generic classes (class X[T](): ...)
- Type aliases (type X = ...)
- New scoping when the new syntax is used within a class body
- Compiler and interpreter changes to support the new syntax and scoping rules 

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Co-authored-by: Eric Traut <eric@traut.com>
Co-authored-by: Larry Hastings <larry@hastings.org>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
This commit is contained in:
Jelle Zijlstra 2023-05-15 20:36:23 -07:00 • committed by GitHub
parent fdafdc235e
commit 24d8b88420
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GPG key ID: 4AEE18F83AFDEB23
56 changed files with 11405 additions and 5469 deletions
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24
Python/ast_opt.c
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@ -642,6 +642,7 @@ static int astfold_withitem(withitem_ty node_, PyArena *ctx_, _PyASTOptimizeStat
static int astfold_excepthandler(excepthandler_ty node_, PyArena *ctx_, _PyASTOptimizeState *state);
static int astfold_match_case(match_case_ty node_, PyArena *ctx_, _PyASTOptimizeState *state);
static int astfold_pattern(pattern_ty node_, PyArena *ctx_, _PyASTOptimizeState *state);
static int astfold_typeparam(typeparam_ty node_, PyArena *ctx_, _PyASTOptimizeState *state);
#define CALL(FUNC, TYPE, ARG) \
if (!FUNC((ARG), ctx_, state)) \
@ -880,6 +881,7 @@ astfold_stmt(stmt_ty node_, PyArena *ctx_, _PyASTOptimizeState *state)
}
switch (node_->kind) {
case FunctionDef_kind:
CALL_SEQ(astfold_typeparam, typeparam, node_->v.FunctionDef.typeparams);
CALL(astfold_arguments, arguments_ty, node_->v.FunctionDef.args);
CALL(astfold_body, asdl_seq, node_->v.FunctionDef.body);
CALL_SEQ(astfold_expr, expr, node_->v.FunctionDef.decorator_list);
@ -888,6 +890,7 @@ astfold_stmt(stmt_ty node_, PyArena *ctx_, _PyASTOptimizeState *state)
}
break;
case AsyncFunctionDef_kind:
CALL_SEQ(astfold_typeparam, typeparam, node_->v.AsyncFunctionDef.typeparams);
CALL(astfold_arguments, arguments_ty, node_->v.AsyncFunctionDef.args);
CALL(astfold_body, asdl_seq, node_->v.AsyncFunctionDef.body);
CALL_SEQ(astfold_expr, expr, node_->v.AsyncFunctionDef.decorator_list);
@ -896,6 +899,7 @@ astfold_stmt(stmt_ty node_, PyArena *ctx_, _PyASTOptimizeState *state)
}
break;
case ClassDef_kind:
CALL_SEQ(astfold_typeparam, typeparam, node_->v.ClassDef.typeparams);
CALL_SEQ(astfold_expr, expr, node_->v.ClassDef.bases);
CALL_SEQ(astfold_keyword, keyword, node_->v.ClassDef.keywords);
CALL(astfold_body, asdl_seq, node_->v.ClassDef.body);
@ -922,6 +926,11 @@ astfold_stmt(stmt_ty node_, PyArena *ctx_, _PyASTOptimizeState *state)
}
CALL_OPT(astfold_expr, expr_ty, node_->v.AnnAssign.value);
break;
case TypeAlias_kind:
CALL(astfold_expr, expr_ty, node_->v.TypeAlias.name);
CALL_SEQ(astfold_typeparam, typeparam, node_->v.TypeAlias.typeparams);
CALL(astfold_expr, expr_ty, node_->v.TypeAlias.value);
break;
case For_kind:
CALL(astfold_expr, expr_ty, node_->v.For.target);
CALL(astfold_expr, expr_ty, node_->v.For.iter);
@ -1074,6 +1083,21 @@ astfold_match_case(match_case_ty node_, PyArena *ctx_, _PyASTOptimizeState *stat
return 1;
}
static int
astfold_typeparam(typeparam_ty node_, PyArena *ctx_, _PyASTOptimizeState *state)
{
switch (node_->kind) {
case TypeVar_kind:
CALL_OPT(astfold_expr, expr_ty, node_->v.TypeVar.bound);
break;
case ParamSpec_kind:
break;
case TypeVarTuple_kind:
break;
}
return 1;
}
#undef CALL
#undef CALL_OPT
#undef CALL_SEQ