diff --git a/Grammar/python.gram b/Grammar/python.gram index 05d7837e3a..1c1c53c4b7 100644 --- a/Grammar/python.gram +++ b/Grammar/python.gram @@ -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 # ----------- diff --git a/Include/internal/pycore_ast.h b/Include/internal/pycore_ast.h index f222d485e0..f5bf1205a8 100644 --- a/Include/internal/pycore_ast.h +++ b/Include/internal/pycore_ast.h @@ -657,14 +657,17 @@ struct _type_param { struct { identifier name; expr_ty bound; + expr_ty default_value; } TypeVar; struct { identifier name; + expr_ty default_value; } ParamSpec; struct { identifier name; + expr_ty default_value; } TypeVarTuple; } v; @@ -892,14 +895,15 @@ pattern_ty _PyAST_MatchOr(asdl_pattern_seq * patterns, int lineno, int col_offset, int end_lineno, int end_col_offset, PyArena *arena); type_ignore_ty _PyAST_TypeIgnore(int lineno, string tag, PyArena *arena); -type_param_ty _PyAST_TypeVar(identifier name, expr_ty bound, int lineno, int - col_offset, int end_lineno, int end_col_offset, - PyArena *arena); -type_param_ty _PyAST_ParamSpec(identifier name, int lineno, int col_offset, int - end_lineno, int end_col_offset, PyArena *arena); -type_param_ty _PyAST_TypeVarTuple(identifier name, int lineno, int col_offset, - int end_lineno, int end_col_offset, PyArena - *arena); +type_param_ty _PyAST_TypeVar(identifier name, expr_ty bound, expr_ty + default_value, int lineno, int col_offset, int + end_lineno, int end_col_offset, PyArena *arena); +type_param_ty _PyAST_ParamSpec(identifier name, expr_ty default_value, int + lineno, int col_offset, int end_lineno, int + end_col_offset, PyArena *arena); +type_param_ty _PyAST_TypeVarTuple(identifier name, expr_ty default_value, int + lineno, int col_offset, int end_lineno, int + end_col_offset, PyArena *arena); PyObject* PyAST_mod2obj(mod_ty t); diff --git a/Include/internal/pycore_ast_state.h b/Include/internal/pycore_ast_state.h index f1b1786264..09ae954654 100644 --- a/Include/internal/pycore_ast_state.h +++ b/Include/internal/pycore_ast_state.h @@ -184,6 +184,7 @@ struct ast_state { PyObject *conversion; PyObject *ctx; PyObject *decorator_list; + PyObject *default_value; PyObject *defaults; PyObject *elt; PyObject *elts; diff --git a/Include/internal/pycore_intrinsics.h b/Include/internal/pycore_intrinsics.h index 8fa88ea3f7..39c2a30f6e 100644 --- a/Include/internal/pycore_intrinsics.h +++ b/Include/internal/pycore_intrinsics.h @@ -28,8 +28,9 @@ #define INTRINSIC_TYPEVAR_WITH_BOUND 2 #define INTRINSIC_TYPEVAR_WITH_CONSTRAINTS 3 #define INTRINSIC_SET_FUNCTION_TYPE_PARAMS 4 +#define INTRINSIC_SET_TYPEPARAM_DEFAULT 5 -#define MAX_INTRINSIC_2 4 +#define MAX_INTRINSIC_2 5 typedef PyObject *(*intrinsic_func1)(PyThreadState* tstate, PyObject *value); typedef PyObject *(*intrinsic_func2)(PyThreadState* tstate, PyObject *value1, PyObject *value2); diff --git a/Include/internal/pycore_typevarobject.h b/Include/internal/pycore_typevarobject.h index c9fa97d682..80a2daf4ef 100644 --- a/Include/internal/pycore_typevarobject.h +++ b/Include/internal/pycore_typevarobject.h @@ -13,10 +13,12 @@ extern PyObject *_Py_make_paramspec(PyThreadState *, PyObject *); extern PyObject *_Py_make_typevartuple(PyThreadState *, PyObject *); extern PyObject *_Py_make_typealias(PyThreadState *, PyObject *); extern PyObject *_Py_subscript_generic(PyThreadState *, PyObject *); +extern PyObject *_Py_set_typeparam_default(PyThreadState *, PyObject *, PyObject *); extern int _Py_initialize_generic(PyInterpreterState *); extern void _Py_clear_generic_types(PyInterpreterState *); extern PyTypeObject _PyTypeAlias_Type; +extern PyObject _Py_NoDefaultStruct; #ifdef __cplusplus } diff --git a/Lib/ast.py b/Lib/ast.py index 9f38605165..d7e51aba59 100644 --- a/Lib/ast.py +++ b/Lib/ast.py @@ -1124,12 +1124,21 @@ def visit_TypeVar(self, node): if node.bound: self.write(": ") self.traverse(node.bound) + if node.default_value: + self.write(" = ") + self.traverse(node.default_value) def visit_TypeVarTuple(self, node): self.write("*" + node.name) + if node.default_value: + self.write(" = ") + self.traverse(node.default_value) def visit_ParamSpec(self, node): self.write("**" + node.name) + if node.default_value: + self.write(" = ") + self.traverse(node.default_value) def visit_TypeAlias(self, node): self.fill("type ") diff --git a/Lib/typing.py b/Lib/typing.py index eff65cfb68..3f6ff491e7 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -38,6 +38,7 @@ ParamSpecKwargs, TypeAliasType, Generic, + NoDefault, ) # Please keep __all__ alphabetized within each category. @@ -138,6 +139,7 @@ 'NewType', 'no_type_check', 'no_type_check_decorator', + 'NoDefault', 'NoReturn', 'NotRequired', 'overload', @@ -266,6 +268,10 @@ def _collect_parameters(args): >>> _collect_parameters((T, Callable[P, T])) (~T, ~P) """ + # required type parameter cannot appear after parameter with default + default_encountered = False + # or after TypeVarTuple + type_var_tuple_encountered = False parameters = [] for t in args: if isinstance(t, type): @@ -280,27 +286,58 @@ def _collect_parameters(args): parameters.append(collected) elif hasattr(t, '__typing_subst__'): if t not in parameters: + if type_var_tuple_encountered and t.has_default(): + raise TypeError('Type parameter with a default' + ' follows TypeVarTuple') + + if t.has_default(): + default_encountered = True + elif default_encountered: + raise TypeError(f'Type parameter {t!r} without a default' + ' follows type parameter with a default') + parameters.append(t) else: + if _is_unpacked_typevartuple(t): + type_var_tuple_encountered = True for x in getattr(t, '__parameters__', ()): if x not in parameters: parameters.append(x) return tuple(parameters) -def _check_generic(cls, parameters, elen): +def _check_generic_specialization(cls, arguments): """Check correct count for parameters of a generic cls (internal helper). This gives a nice error message in case of count mismatch. """ - if not elen: + expected_len = len(cls.__parameters__) + if not expected_len: raise TypeError(f"{cls} is not a generic class") - alen = len(parameters) - if alen != elen: - raise TypeError(f"Too {'many' if alen > elen else 'few'} arguments for {cls};" - f" actual {alen}, expected {elen}") + actual_len = len(arguments) + if actual_len != expected_len: + # deal with defaults + if actual_len < expected_len: + # If the parameter at index `actual_len` in the parameters list + # has a default, then all parameters after it must also have + # one, because we validated as much in _collect_parameters(). + # That means that no error needs to be raised here, despite + # the number of arguments being passed not matching the number + # of parameters: all parameters that aren't explicitly + # specialized in this call are parameters with default values. + if cls.__parameters__[actual_len].has_default(): + return + + expected_len -= sum(p.has_default() for p in cls.__parameters__) + expect_val = f"at least {expected_len}" + else: + expect_val = expected_len + + raise TypeError(f"Too {'many' if actual_len > expected_len else 'few'} arguments" + f" for {cls}; actual {actual_len}, expected {expect_val}") -def _unpack_args(args): + +def _unpack_args(*args): newargs = [] for arg in args: subargs = getattr(arg, '__typing_unpacked_tuple_args__', None) @@ -1089,11 +1126,15 @@ def _typevartuple_prepare_subst(self, alias, args): elif left + right > alen: raise TypeError(f"Too few arguments for {alias};" f" actual {alen}, expected at least {plen-1}") + if left == alen - right and self.has_default(): + replacement = _unpack_args(self.__default__) + else: + replacement = args[left: alen - right] return ( *args[:left], *([fillarg]*(typevartuple_index - left)), - tuple(args[left: alen - right]), + replacement, *([fillarg]*(plen - right - left - typevartuple_index - 1)), *args[alen - right:], ) @@ -1111,6 +1152,8 @@ def _paramspec_subst(self, arg): def _paramspec_prepare_subst(self, alias, args): params = alias.__parameters__ i = params.index(self) + if i == len(args) and self.has_default(): + args = [*args, self.__default__] if i >= len(args): raise TypeError(f"Too few arguments for {alias}") # Special case where Z[[int, str, bool]] == Z[int, str, bool] in PEP 612. @@ -1124,33 +1167,33 @@ def _paramspec_prepare_subst(self, alias, args): @_tp_cache -def _generic_class_getitem(cls, params): +def _generic_class_getitem(cls, args): """Parameterizes a generic class. At least, parameterizing a generic class is the *main* thing this method does. For example, for some generic class `Foo`, this is called when we - do `Foo[int]` - there, with `cls=Foo` and `params=int`. + do `Foo[int]` - there, with `cls=Foo` and `args=int`. However, note that this method is also called when defining generic classes in the first place with `class Foo(Generic[T]): ...`. """ - if not isinstance(params, tuple): - params = (params,) + if not isinstance(args, tuple): + args = (args,) - params = tuple(_type_convert(p) for p in params) + args = tuple(_type_convert(p) for p in args) is_generic_or_protocol = cls in (Generic, Protocol) if is_generic_or_protocol: # Generic and Protocol can only be subscripted with unique type variables. - if not params: + if not args: raise TypeError( f"Parameter list to {cls.__qualname__}[...] cannot be empty" ) - if not all(_is_typevar_like(p) for p in params): + if not all(_is_typevar_like(p) for p in args): raise TypeError( f"Parameters to {cls.__name__}[...] must all be type variables " f"or parameter specification variables.") - if len(set(params)) != len(params): + if len(set(args)) != len(args): raise TypeError( f"Parameters to {cls.__name__}[...] must all be unique") else: @@ -1158,18 +1201,18 @@ def _generic_class_getitem(cls, params): for param in cls.__parameters__: prepare = getattr(param, '__typing_prepare_subst__', None) if prepare is not None: - params = prepare(cls, params) - _check_generic(cls, params, len(cls.__parameters__)) + args = prepare(cls, args) + _check_generic_specialization(cls, args) new_args = [] - for param, new_arg in zip(cls.__parameters__, params): + for param, new_arg in zip(cls.__parameters__, args): if isinstance(param, TypeVarTuple): new_args.extend(new_arg) else: new_args.append(new_arg) - params = tuple(new_args) + args = tuple(new_args) - return _GenericAlias(cls, params) + return _GenericAlias(cls, args) def _generic_init_subclass(cls, *args, **kwargs): @@ -1390,8 +1433,7 @@ def __getitem__(self, args): # Preprocess `args`. if not isinstance(args, tuple): args = (args,) - args = tuple(_type_convert(p) for p in args) - args = _unpack_args(args) + args = _unpack_args(*(_type_convert(p) for p in args)) new_args = self._determine_new_args(args) r = self.copy_with(new_args) return r @@ -1552,7 +1594,12 @@ def __getitem__(self, params): params = (params,) msg = "Parameters to generic types must be types." params = tuple(_type_check(p, msg) for p in params) - _check_generic(self, params, self._nparams) + actual_len = len(params) + if actual_len != self._nparams: + if not self._nparams: + raise TypeError(f"{self} is not a generic class") + raise TypeError(f"Too {'many' if actual_len > self._nparams else 'few'} arguments for {self};" + f" actual {actual_len}, expected {self._nparams}") return self.copy_with(params) def copy_with(self, params): diff --git a/Modules/_typingmodule.c b/Modules/_typingmodule.c index 9ea72bf89c..180f3d7eb0 100644 --- a/Modules/_typingmodule.c +++ b/Modules/_typingmodule.c @@ -63,6 +63,9 @@ _typing_exec(PyObject *m) if (PyModule_AddObjectRef(m, "TypeAliasType", (PyObject *)&_PyTypeAlias_Type) < 0) { return -1; } + if (PyModule_AddObjectRef(m, "NoDefault", (PyObject *)&_Py_NoDefaultStruct) < 0) { + return -1; + } return 0; } diff --git a/Objects/clinic/typevarobject.c.h b/Objects/clinic/typevarobject.c.h index 2bb0a98a2e..0ba4ff48bc 100644 --- a/Objects/clinic/typevarobject.c.h +++ b/Objects/clinic/typevarobject.c.h @@ -9,16 +9,16 @@ preserve #include "pycore_modsupport.h" // _PyArg_UnpackKeywordsWithVararg() PyDoc_STRVAR(typevar_new__doc__, -"typevar(name, *constraints, bound=None, covariant=False,\n" -" contravariant=False, infer_variance=False)\n" +"typevar(name, *constraints, bound=None, default=typing.NoDefault,\n" +" covariant=False, contravariant=False, infer_variance=False)\n" "--\n" "\n" "Create a TypeVar."); static PyObject * typevar_new_impl(PyTypeObject *type, PyObject *name, PyObject *constraints, - PyObject *bound, int covariant, int contravariant, - int infer_variance); + PyObject *bound, PyObject *default_value, int covariant, + int contravariant, int infer_variance); static PyObject * typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) @@ -26,14 +26,14 @@ typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) PyObject *return_value = NULL; #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE) - #define NUM_KEYWORDS 5 + #define NUM_KEYWORDS 6 static struct { PyGC_Head _this_is_not_used; PyObject_VAR_HEAD PyObject *ob_item[NUM_KEYWORDS]; } _kwtuple = { .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS) - .ob_item = { &_Py_ID(name), &_Py_ID(bound), &_Py_ID(covariant), &_Py_ID(contravariant), &_Py_ID(infer_variance), }, + .ob_item = { &_Py_ID(name), &_Py_ID(bound), &_Py_ID(default), &_Py_ID(covariant), &_Py_ID(contravariant), &_Py_ID(infer_variance), }, }; #undef NUM_KEYWORDS #define KWTUPLE (&_kwtuple.ob_base.ob_base) @@ -42,20 +42,21 @@ typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) # define KWTUPLE NULL #endif // !Py_BUILD_CORE - static const char * const _keywords[] = {"name", "bound", "covariant", "contravariant", "infer_variance", NULL}; + static const char * const _keywords[] = {"name", "bound", "default", "covariant", "contravariant", "infer_variance", NULL}; static _PyArg_Parser _parser = { .keywords = _keywords, .fname = "typevar", .kwtuple = KWTUPLE, }; #undef KWTUPLE - PyObject *argsbuf[6]; + PyObject *argsbuf[7]; PyObject * const *fastargs; Py_ssize_t nargs = PyTuple_GET_SIZE(args); Py_ssize_t noptargs = Py_MIN(nargs, 1) + (kwargs ? PyDict_GET_SIZE(kwargs) : 0) - 1; PyObject *name; PyObject *constraints = NULL; PyObject *bound = Py_None; + PyObject *default_value = &_Py_NoDefaultStruct; int covariant = 0; int contravariant = 0; int infer_variance = 0; @@ -80,7 +81,13 @@ typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) } } if (fastargs[3]) { - covariant = PyObject_IsTrue(fastargs[3]); + default_value = fastargs[3]; + if (!--noptargs) { + goto skip_optional_kwonly; + } + } + if (fastargs[4]) { + covariant = PyObject_IsTrue(fastargs[4]); if (covariant < 0) { goto exit; } @@ -88,8 +95,8 @@ typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) goto skip_optional_kwonly; } } - if (fastargs[4]) { - contravariant = PyObject_IsTrue(fastargs[4]); + if (fastargs[5]) { + contravariant = PyObject_IsTrue(fastargs[5]); if (contravariant < 0) { goto exit; } @@ -97,12 +104,12 @@ typevar_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) goto skip_optional_kwonly; } } - infer_variance = PyObject_IsTrue(fastargs[5]); + infer_variance = PyObject_IsTrue(fastargs[6]); if (infer_variance < 0) { goto exit; } skip_optional_kwonly: - return_value = typevar_new_impl(type, name, constraints, bound, covariant, contravariant, infer_variance); + return_value = typevar_new_impl(type, name, constraints, bound, default_value, covariant, contravariant, infer_variance); exit: Py_XDECREF(constraints); @@ -117,6 +124,36 @@ PyDoc_STRVAR(typevar_typing_subst__doc__, #define TYPEVAR_TYPING_SUBST_METHODDEF \ {"__typing_subst__", (PyCFunction)typevar_typing_subst, METH_O, typevar_typing_subst__doc__}, +PyDoc_STRVAR(typevar_typing_prepare_subst__doc__, +"__typing_prepare_subst__($self, alias, args, /)\n" +"--\n" +"\n"); + +#define TYPEVAR_TYPING_PREPARE_SUBST_METHODDEF \ + {"__typing_prepare_subst__", _PyCFunction_CAST(typevar_typing_prepare_subst), METH_FASTCALL, typevar_typing_prepare_subst__doc__}, + +static PyObject * +typevar_typing_prepare_subst_impl(typevarobject *self, PyObject *alias, + PyObject *args); + +static PyObject * +typevar_typing_prepare_subst(typevarobject *self, PyObject *const *args, Py_ssize_t nargs) +{ + PyObject *return_value = NULL; + PyObject *alias; + PyObject *__clinic_args; + + if (!_PyArg_CheckPositional("__typing_prepare_subst__", nargs, 2, 2)) { + goto exit; + } + alias = args[0]; + __clinic_args = args[1]; + return_value = typevar_typing_prepare_subst_impl(self, alias, __clinic_args); + +exit: + return return_value; +} + PyDoc_STRVAR(typevar_reduce__doc__, "__reduce__($self, /)\n" "--\n" @@ -134,6 +171,23 @@ typevar_reduce(typevarobject *self, PyObject *Py_UNUSED(ignored)) return typevar_reduce_impl(self); } +PyDoc_STRVAR(typevar_has_default__doc__, +"has_default($self, /)\n" +"--\n" +"\n"); + +#define TYPEVAR_HAS_DEFAULT_METHODDEF \ + {"has_default", (PyCFunction)typevar_has_default, METH_NOARGS, typevar_has_default__doc__}, + +static PyObject * +typevar_has_default_impl(typevarobject *self); + +static PyObject * +typevar_has_default(typevarobject *self, PyObject *Py_UNUSED(ignored)) +{ + return typevar_has_default_impl(self); +} + PyDoc_STRVAR(paramspecargs_new__doc__, "paramspecargs(origin)\n" "--\n" @@ -243,15 +297,16 @@ exit: } PyDoc_STRVAR(paramspec_new__doc__, -"paramspec(name, *, bound=None, covariant=False, contravariant=False,\n" -" infer_variance=False)\n" +"paramspec(name, *, bound=None, default=typing.NoDefault,\n" +" covariant=False, contravariant=False, infer_variance=False)\n" "--\n" "\n" "Create a ParamSpec object."); static PyObject * paramspec_new_impl(PyTypeObject *type, PyObject *name, PyObject *bound, - int covariant, int contravariant, int infer_variance); + PyObject *default_value, int covariant, int contravariant, + int infer_variance); static PyObject * paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) @@ -259,14 +314,14 @@ paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) PyObject *return_value = NULL; #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE) - #define NUM_KEYWORDS 5 + #define NUM_KEYWORDS 6 static struct { PyGC_Head _this_is_not_used; PyObject_VAR_HEAD PyObject *ob_item[NUM_KEYWORDS]; } _kwtuple = { .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS) - .ob_item = { &_Py_ID(name), &_Py_ID(bound), &_Py_ID(covariant), &_Py_ID(contravariant), &_Py_ID(infer_variance), }, + .ob_item = { &_Py_ID(name), &_Py_ID(bound), &_Py_ID(default), &_Py_ID(covariant), &_Py_ID(contravariant), &_Py_ID(infer_variance), }, }; #undef NUM_KEYWORDS #define KWTUPLE (&_kwtuple.ob_base.ob_base) @@ -275,19 +330,20 @@ paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) # define KWTUPLE NULL #endif // !Py_BUILD_CORE - static const char * const _keywords[] = {"name", "bound", "covariant", "contravariant", "infer_variance", NULL}; + static const char * const _keywords[] = {"name", "bound", "default", "covariant", "contravariant", "infer_variance", NULL}; static _PyArg_Parser _parser = { .keywords = _keywords, .fname = "paramspec", .kwtuple = KWTUPLE, }; #undef KWTUPLE - PyObject *argsbuf[5]; + PyObject *argsbuf[6]; PyObject * const *fastargs; Py_ssize_t nargs = PyTuple_GET_SIZE(args); Py_ssize_t noptargs = nargs + (kwargs ? PyDict_GET_SIZE(kwargs) : 0) - 1; PyObject *name; PyObject *bound = Py_None; + PyObject *default_value = &_Py_NoDefaultStruct; int covariant = 0; int contravariant = 0; int infer_variance = 0; @@ -311,7 +367,13 @@ paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) } } if (fastargs[2]) { - covariant = PyObject_IsTrue(fastargs[2]); + default_value = fastargs[2]; + if (!--noptargs) { + goto skip_optional_kwonly; + } + } + if (fastargs[3]) { + covariant = PyObject_IsTrue(fastargs[3]); if (covariant < 0) { goto exit; } @@ -319,8 +381,8 @@ paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) goto skip_optional_kwonly; } } - if (fastargs[3]) { - contravariant = PyObject_IsTrue(fastargs[3]); + if (fastargs[4]) { + contravariant = PyObject_IsTrue(fastargs[4]); if (contravariant < 0) { goto exit; } @@ -328,12 +390,12 @@ paramspec_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) goto skip_optional_kwonly; } } - infer_variance = PyObject_IsTrue(fastargs[4]); + infer_variance = PyObject_IsTrue(fastargs[5]); if (infer_variance < 0) { goto exit; } skip_optional_kwonly: - return_value = paramspec_new_impl(type, name, bound, covariant, contravariant, infer_variance); + return_value = paramspec_new_impl(type, name, bound, default_value, covariant, contravariant, infer_variance); exit: return return_value; @@ -394,14 +456,32 @@ paramspec_reduce(paramspecobject *self, PyObject *Py_UNUSED(ignored)) return paramspec_reduce_impl(self); } +PyDoc_STRVAR(paramspec_has_default__doc__, +"has_default($self, /)\n" +"--\n" +"\n"); + +#define PARAMSPEC_HAS_DEFAULT_METHODDEF \ + {"has_default", (PyCFunction)paramspec_has_default, METH_NOARGS, paramspec_has_default__doc__}, + +static PyObject * +paramspec_has_default_impl(paramspecobject *self); + +static PyObject * +paramspec_has_default(paramspecobject *self, PyObject *Py_UNUSED(ignored)) +{ + return paramspec_has_default_impl(self); +} + PyDoc_STRVAR(typevartuple__doc__, -"typevartuple(name)\n" +"typevartuple(name, *, default=typing.NoDefault)\n" "--\n" "\n" "Create a new TypeVarTuple with the given name."); static PyObject * -typevartuple_impl(PyTypeObject *type, PyObject *name); +typevartuple_impl(PyTypeObject *type, PyObject *name, + PyObject *default_value); static PyObject * typevartuple(PyTypeObject *type, PyObject *args, PyObject *kwargs) @@ -409,14 +489,14 @@ typevartuple(PyTypeObject *type, PyObject *args, PyObject *kwargs) PyObject *return_value = NULL; #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE) - #define NUM_KEYWORDS 1 + #define NUM_KEYWORDS 2 static struct { PyGC_Head _this_is_not_used; PyObject_VAR_HEAD PyObject *ob_item[NUM_KEYWORDS]; } _kwtuple = { .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS) - .ob_item = { &_Py_ID(name), }, + .ob_item = { &_Py_ID(name), &_Py_ID(default), }, }; #undef NUM_KEYWORDS #define KWTUPLE (&_kwtuple.ob_base.ob_base) @@ -425,17 +505,19 @@ typevartuple(PyTypeObject *type, PyObject *args, PyObject *kwargs) # define KWTUPLE NULL #endif // !Py_BUILD_CORE - static const char * const _keywords[] = {"name", NULL}; + static const char * const _keywords[] = {"name", "default", NULL}; static _PyArg_Parser _parser = { .keywords = _keywords, .fname = "typevartuple", .kwtuple = KWTUPLE, }; #undef KWTUPLE - PyObject *argsbuf[1]; + PyObject *argsbuf[2]; PyObject * const *fastargs; Py_ssize_t nargs = PyTuple_GET_SIZE(args); + Py_ssize_t noptargs = nargs + (kwargs ? PyDict_GET_SIZE(kwargs) : 0) - 1; PyObject *name; + PyObject *default_value = &_Py_NoDefaultStruct; fastargs = _PyArg_UnpackKeywords(_PyTuple_CAST(args)->ob_item, nargs, kwargs, NULL, &_parser, 1, 1, 0, argsbuf); if (!fastargs) { @@ -446,7 +528,12 @@ typevartuple(PyTypeObject *type, PyObject *args, PyObject *kwargs) goto exit; } name = fastargs[0]; - return_value = typevartuple_impl(type, name); + if (!noptargs) { + goto skip_optional_kwonly; + } + default_value = fastargs[1]; +skip_optional_kwonly: + return_value = typevartuple_impl(type, name, default_value); exit: return return_value; @@ -507,6 +594,23 @@ typevartuple_reduce(typevartupleobject *self, PyObject *Py_UNUSED(ignored)) return typevartuple_reduce_impl(self); } +PyDoc_STRVAR(typevartuple_has_default__doc__, +"has_default($self, /)\n" +"--\n" +"\n"); + +#define TYPEVARTUPLE_HAS_DEFAULT_METHODDEF \ + {"has_default", (PyCFunction)typevartuple_has_default, METH_NOARGS, typevartuple_has_default__doc__}, + +static PyObject * +typevartuple_has_default_impl(typevartupleobject *self); + +static PyObject * +typevartuple_has_default(typevartupleobject *self, PyObject *Py_UNUSED(ignored)) +{ + return typevartuple_has_default_impl(self); +} + PyDoc_STRVAR(typealias_reduce__doc__, "__reduce__($self, /)\n" "--\n" @@ -591,4 +695,4 @@ skip_optional_kwonly: exit: return return_value; } -/*[clinic end generated code: output=5a582d9d89ad787b input=a9049054013a1b77]*/ +/*[clinic end generated code: output=73b39e550e4e336c input=a9049054013a1b77]*/ diff --git a/Objects/typevarobject.c b/Objects/typevarobject.c index 7f80c9c61b..cc91604526 100644 --- a/Objects/typevarobject.c +++ b/Objects/typevarobject.c @@ -23,6 +23,8 @@ typedef struct { PyObject *evaluate_bound; PyObject *constraints; PyObject *evaluate_constraints; + PyObject *default_value; + PyObject *evaluate_default; bool covariant; bool contravariant; bool infer_variance; @@ -31,12 +33,16 @@ typedef struct { typedef struct { PyObject_HEAD PyObject *name; + PyObject *default_value; + PyObject *evaluate_default; } typevartupleobject; typedef struct { PyObject_HEAD PyObject *name; PyObject *bound; + PyObject *default_value; + PyObject *evaluate_default; bool covariant; bool contravariant; bool infer_variance; @@ -53,6 +59,64 @@ typedef struct { #include "clinic/typevarobject.c.h" +/* NoDefault is a marker object to indicate that a parameter has no default. */ + +static PyObject * +NoDefault_repr(PyObject *op) +{ + return PyUnicode_FromString("typing.NoDefault"); +} + +static PyObject * +NoDefault_reduce(PyObject *op, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString("NoDefault"); +} + +static PyMethodDef notimplemented_methods[] = { + {"__reduce__", NoDefault_reduce, METH_NOARGS, NULL}, + {NULL, NULL} +}; + +static PyObject * +nodefault_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) +{ + if (PyTuple_GET_SIZE(args) || (kwargs && PyDict_GET_SIZE(kwargs))) { + PyErr_SetString(PyExc_TypeError, "NoDefaultType takes no arguments"); + return NULL; + } + return &_Py_NoDefaultStruct; +} + +static void +nodefault_dealloc(PyObject *nodefault) +{ + /* This should never get called, but we also don't want to SEGV if + * we accidentally decref NoDefault out of existence. Instead, + * since NoDefault is an immortal object, re-set the reference count. + */ + _Py_SetImmortal(nodefault); +} + +PyDoc_STRVAR(notimplemented_doc, +"NoDefaultType()\n" +"--\n\n" +"The type of the NoDefault singleton."); + +PyTypeObject _PyNoDefault_Type = { + PyVarObject_HEAD_INIT(&PyType_Type, 0) + "NoDefaultType", + .tp_dealloc = nodefault_dealloc, + .tp_repr = NoDefault_repr, + .tp_flags = Py_TPFLAGS_DEFAULT, + .tp_doc = notimplemented_doc, + .tp_methods = notimplemented_methods, + .tp_new = nodefault_new, +}; + +PyObject _Py_NoDefaultStruct = _PyObject_HEAD_INIT(&_PyNoDefault_Type); + + static PyObject * call_typing_func_object(const char *name, PyObject **args, size_t nargs) { @@ -200,6 +264,8 @@ typevar_dealloc(PyObject *self) Py_XDECREF(tv->evaluate_bound); Py_XDECREF(tv->constraints); Py_XDECREF(tv->evaluate_constraints); + Py_XDECREF(tv->default_value); + Py_XDECREF(tv->evaluate_default); PyObject_ClearManagedDict(self); PyObject_ClearWeakRefs(self); @@ -216,6 +282,8 @@ typevar_traverse(PyObject *self, visitproc visit, void *arg) Py_VISIT(tv->evaluate_bound); Py_VISIT(tv->constraints); Py_VISIT(tv->evaluate_constraints); + Py_VISIT(tv->default_value); + Py_VISIT(tv->evaluate_default); PyObject_VisitManagedDict(self, visit, arg); return 0; } @@ -227,6 +295,8 @@ typevar_clear(typevarobject *self) Py_CLEAR(self->evaluate_bound); Py_CLEAR(self->constraints); Py_CLEAR(self->evaluate_constraints); + Py_CLEAR(self->default_value); + Py_CLEAR(self->evaluate_default); PyObject_ClearManagedDict((PyObject *)self); return 0; } @@ -266,6 +336,20 @@ typevar_bound(typevarobject *self, void *Py_UNUSED(ignored)) return bound; } +static PyObject * +typevar_default(typevarobject *self, void *unused) +{ + if (self->default_value != NULL) { + return Py_NewRef(self->default_value); + } + if (self->evaluate_default == NULL) { + return &_Py_NoDefaultStruct; + } + PyObject *default_value = PyObject_CallNoArgs(self->evaluate_default); + self->default_value = Py_XNewRef(default_value); + return default_value; +} + static PyObject * typevar_constraints(typevarobject *self, void *Py_UNUSED(ignored)) { @@ -283,12 +367,14 @@ typevar_constraints(typevarobject *self, void *Py_UNUSED(ignored)) static PyGetSetDef typevar_getset[] = { {"__bound__", (getter)typevar_bound, NULL, NULL, NULL}, {"__constraints__", (getter)typevar_constraints, NULL, NULL, NULL}, + {"__default__", (getter)typevar_default, NULL, NULL, NULL}, {0} }; static typevarobject * typevar_alloc(PyObject *name, PyObject *bound, PyObject *evaluate_bound, PyObject *constraints, PyObject *evaluate_constraints, + PyObject *default_value, bool covariant, bool contravariant, bool infer_variance, PyObject *module) { @@ -305,6 +391,8 @@ typevar_alloc(PyObject *name, PyObject *bound, PyObject *evaluate_bound, tv->evaluate_bound = Py_XNewRef(evaluate_bound); tv->constraints = Py_XNewRef(constraints); tv->evaluate_constraints = Py_XNewRef(evaluate_constraints); + tv->default_value = Py_XNewRef(default_value); + tv->evaluate_default = NULL; tv->covariant = covariant; tv->contravariant = contravariant; @@ -328,6 +416,7 @@ typevar.__new__ as typevar_new name: object(subclass_of="&PyUnicode_Type") *constraints: object bound: object = None + default as default_value: object(c_default="&_Py_NoDefaultStruct") = typing.NoDefault covariant: bool = False contravariant: bool = False infer_variance: bool = False @@ -337,9 +426,9 @@ Create a TypeVar. static PyObject * typevar_new_impl(PyTypeObject *type, PyObject *name, PyObject *constraints, - PyObject *bound, int covariant, int contravariant, - int infer_variance) -/*[clinic end generated code: output=1d200450ee99226d input=41ae33a916bfe76f]*/ + PyObject *bound, PyObject *default_value, int covariant, + int contravariant, int infer_variance) +/*[clinic end generated code: output=d2b248ff074eaab6 input=836f97f631d7293a]*/ { if (covariant && contravariant) { PyErr_SetString(PyExc_ValueError, @@ -386,6 +475,7 @@ typevar_new_impl(PyTypeObject *type, PyObject *name, PyObject *constraints, PyObject *tv = (PyObject *)typevar_alloc(name, bound, NULL, constraints, NULL, + default_value, covariant, contravariant, infer_variance, module); Py_XDECREF(bound); @@ -410,6 +500,66 @@ typevar_typing_subst(typevarobject *self, PyObject *arg) return result; } +/*[clinic input] +typevar.__typing_prepare_subst__ as typevar_typing_prepare_subst + + alias: object + args: object + / + +[clinic start generated code]*/ + +static PyObject * +typevar_typing_prepare_subst_impl(typevarobject *self, PyObject *alias, + PyObject *args) +/*[clinic end generated code: output=82c3f4691e0ded22 input=201a750415d14ffb]*/ +{ + PyObject *params = PyObject_GetAttrString(alias, "__parameters__"); + if (params == NULL) { + return NULL; + } + Py_ssize_t i = PySequence_Index(params, (PyObject *)self); + if (i == -1) { + Py_DECREF(params); + return NULL; + } + Py_ssize_t args_len = PySequence_Length(args); + if (args_len == -1) { + Py_DECREF(params); + return NULL; + } + if (i < args_len) { + // We already have a value for our TypeVar + Py_DECREF(params); + return Py_NewRef(args); + } + else if (i == args_len) { + // If the TypeVar has a default, use it. + PyObject *dflt = typevar_default(self, NULL); + if (dflt == NULL) { + Py_DECREF(params); + return NULL; + } + if (dflt != &_Py_NoDefaultStruct) { + PyObject *new_args = PyTuple_Pack(1, dflt); + Py_DECREF(dflt); + if (new_args == NULL) { + Py_DECREF(params); + return NULL; + } + PyObject *result = PySequence_Concat(args, new_args); + Py_DECREF(params); + Py_DECREF(new_args); + return result; + } + } + Py_DECREF(params); + PyErr_Format(PyExc_TypeError, + "Too few arguments for %S; actual %d, expected at least %d", + alias, args_len, i + 1); + return NULL; +} + /*[clinic input] typevar.__reduce__ as typevar_reduce @@ -422,6 +572,23 @@ typevar_reduce_impl(typevarobject *self) return Py_NewRef(self->name); } + +/*[clinic input] +typevar.has_default as typevar_has_default + +[clinic start generated code]*/ + +static PyObject * +typevar_has_default_impl(typevarobject *self) +/*[clinic end generated code: output=76bf0b8dc98b97dd input=31024aa030761cf6]*/ +{ + if (self->evaluate_default != NULL || + (self->default_value != &_Py_NoDefaultStruct && self->default_value != NULL)) { + Py_RETURN_TRUE; + } + Py_RETURN_FALSE; +} + static PyObject * typevar_mro_entries(PyObject *self, PyObject *args) { @@ -432,7 +599,9 @@ typevar_mro_entries(PyObject *self, PyObject *args) static PyMethodDef typevar_methods[] = { TYPEVAR_TYPING_SUBST_METHODDEF + TYPEVAR_TYPING_PREPARE_SUBST_METHODDEF TYPEVAR_REDUCE_METHODDEF + TYPEVAR_HAS_DEFAULT_METHODDEF {"__mro_entries__", typevar_mro_entries, METH_O}, {0} }; @@ -457,12 +626,18 @@ variables::\n\ class StrOrBytesSequence[A: (str, bytes)]:\n\ ...\n\ \n\ +Type variables can also have defaults:\n\ +\n\ + class IntDefault[T = int]:\n\ + ...\n\ +\n\ However, if desired, reusable type variables can also be constructed\n\ manually, like so::\n\ \n\ T = TypeVar('T') # Can be anything\n\ S = TypeVar('S', bound=str) # Can be any subtype of str\n\ A = TypeVar('A', str, bytes) # Must be exactly str or bytes\n\ + D = TypeVar('D', default=int) # Defaults to int\n\ \n\ Type variables exist primarily for the benefit of static type\n\ checkers. They serve as the parameters for generic types as well\n\ @@ -739,6 +914,8 @@ paramspec_dealloc(PyObject *self) Py_DECREF(ps->name); Py_XDECREF(ps->bound); + Py_XDECREF(ps->default_value); + Py_XDECREF(ps->evaluate_default); PyObject_ClearManagedDict(self); PyObject_ClearWeakRefs(self); @@ -752,6 +929,8 @@ paramspec_traverse(PyObject *self, visitproc visit, void *arg) Py_VISIT(Py_TYPE(self)); paramspecobject *ps = (paramspecobject *)self; Py_VISIT(ps->bound); + Py_VISIT(ps->default_value); + Py_VISIT(ps->evaluate_default); PyObject_VisitManagedDict(self, visit, arg); return 0; } @@ -760,6 +939,8 @@ static int paramspec_clear(paramspecobject *self) { Py_CLEAR(self->bound); + Py_CLEAR(self->default_value); + Py_CLEAR(self->evaluate_default); PyObject_ClearManagedDict((PyObject *)self); return 0; } @@ -800,14 +981,29 @@ paramspec_kwargs(PyObject *self, void *unused) return (PyObject *)paramspecattr_new(tp, self); } +static PyObject * +paramspec_default(paramspecobject *self, void *unused) +{ + if (self->default_value != NULL) { + return Py_NewRef(self->default_value); + } + if (self->evaluate_default == NULL) { + return &_Py_NoDefaultStruct; + } + PyObject *default_value = PyObject_CallNoArgs(self->evaluate_default); + self->default_value = Py_XNewRef(default_value); + return default_value; +} + static PyGetSetDef paramspec_getset[] = { {"args", (getter)paramspec_args, NULL, PyDoc_STR("Represents positional arguments."), NULL}, {"kwargs", (getter)paramspec_kwargs, NULL, PyDoc_STR("Represents keyword arguments."), NULL}, + {"__default__", (getter)paramspec_default, NULL, "The default value for this ParamSpec.", NULL}, {0}, }; static paramspecobject * -paramspec_alloc(PyObject *name, PyObject *bound, bool covariant, +paramspec_alloc(PyObject *name, PyObject *bound, PyObject *default_value, bool covariant, bool contravariant, bool infer_variance, PyObject *module) { PyTypeObject *tp = _PyInterpreterState_GET()->cached_objects.paramspec_type; @@ -820,6 +1016,8 @@ paramspec_alloc(PyObject *name, PyObject *bound, bool covariant, ps->covariant = covariant; ps->contravariant = contravariant; ps->infer_variance = infer_variance; + ps->default_value = Py_XNewRef(default_value); + ps->evaluate_default = NULL; _PyObject_GC_TRACK(ps); if (module != NULL) { if (PyObject_SetAttrString((PyObject *)ps, "__module__", module) < 0) { @@ -837,6 +1035,7 @@ paramspec.__new__ as paramspec_new name: object(subclass_of="&PyUnicode_Type") * bound: object = None + default as default_value: object(c_default="&_Py_NoDefaultStruct") = typing.NoDefault covariant: bool = False contravariant: bool = False infer_variance: bool = False @@ -846,8 +1045,9 @@ Create a ParamSpec object. static PyObject * paramspec_new_impl(PyTypeObject *type, PyObject *name, PyObject *bound, - int covariant, int contravariant, int infer_variance) -/*[clinic end generated code: output=fd2daab79cba62da input=57c49c581979b952]*/ + PyObject *default_value, int covariant, int contravariant, + int infer_variance) +/*[clinic end generated code: output=47ca9d63fa5a094d input=495e1565bc067ab9]*/ { if (covariant && contravariant) { PyErr_SetString(PyExc_ValueError, "Bivariant types are not supported."); @@ -869,7 +1069,7 @@ paramspec_new_impl(PyTypeObject *type, PyObject *name, PyObject *bound, return NULL; } PyObject *ps = (PyObject *)paramspec_alloc( - name, bound, covariant, contravariant, infer_variance, module); + name, bound, default_value, covariant, contravariant, infer_variance, module); Py_XDECREF(bound); Py_DECREF(module); return ps; @@ -925,6 +1125,22 @@ paramspec_reduce_impl(paramspecobject *self) return Py_NewRef(self->name); } +/*[clinic input] +paramspec.has_default as paramspec_has_default + +[clinic start generated code]*/ + +static PyObject * +paramspec_has_default_impl(paramspecobject *self) +/*[clinic end generated code: output=daaae7467a6a4368 input=2112e97eeb76cd59]*/ +{ + if (self->evaluate_default != NULL || + (self->default_value != &_Py_NoDefaultStruct && self->default_value != NULL)) { + Py_RETURN_TRUE; + } + Py_RETURN_FALSE; +} + static PyObject * paramspec_mro_entries(PyObject *self, PyObject *args) { @@ -936,6 +1152,7 @@ paramspec_mro_entries(PyObject *self, PyObject *args) static PyMethodDef paramspec_methods[] = { PARAMSPEC_TYPING_SUBST_METHODDEF PARAMSPEC_TYPING_PREPARE_SUBST_METHODDEF + PARAMSPEC_HAS_DEFAULT_METHODDEF PARAMSPEC_REDUCE_METHODDEF {"__mro_entries__", paramspec_mro_entries, METH_O}, {0} @@ -950,10 +1167,17 @@ where the use of '**' creates a parameter specification::\n\ \n\ type IntFunc[**P] = Callable[P, int]\n\ \n\ +The following syntax creates a parameter specification that defaults\n\ +to a callable accepting two positional-only arguments of types int\n\ +and str:\n\ +\n\ + type IntFuncDefault[**P = (int, str)] = Callable[P, int]\n\ +\n\ For compatibility with Python 3.11 and earlier, ParamSpec objects\n\ can also be created as follows::\n\ \n\ P = ParamSpec('P')\n\ + DefaultP = ParamSpec('DefaultP', default=(int, str))\n\ \n\ Parameter specification variables exist primarily for the benefit of\n\ static type checkers. They are used to forward the parameter types of\n\ @@ -1021,6 +1245,8 @@ typevartuple_dealloc(PyObject *self) typevartupleobject *tvt = (typevartupleobject *)self; Py_DECREF(tvt->name); + Py_XDECREF(tvt->default_value); + Py_XDECREF(tvt->evaluate_default); PyObject_ClearManagedDict(self); PyObject_ClearWeakRefs(self); @@ -1060,7 +1286,7 @@ static PyMemberDef typevartuple_members[] = { }; static typevartupleobject * -typevartuple_alloc(PyObject *name, PyObject *module) +typevartuple_alloc(PyObject *name, PyObject *module, PyObject *default_value) { PyTypeObject *tp = _PyInterpreterState_GET()->cached_objects.typevartuple_type; typevartupleobject *tvt = PyObject_GC_New(typevartupleobject, tp); @@ -1068,6 +1294,8 @@ typevartuple_alloc(PyObject *name, PyObject *module) return NULL; } tvt->name = Py_NewRef(name); + tvt->default_value = Py_XNewRef(default_value); + tvt->evaluate_default = NULL; _PyObject_GC_TRACK(tvt); if (module != NULL) { if (PyObject_SetAttrString((PyObject *)tvt, "__module__", module) < 0) { @@ -1083,19 +1311,22 @@ typevartuple_alloc(PyObject *name, PyObject *module) typevartuple.__new__ name: object(subclass_of="&PyUnicode_Type") + * + default as default_value: object(c_default="&_Py_NoDefaultStruct") = typing.NoDefault Create a new TypeVarTuple with the given name. [clinic start generated code]*/ static PyObject * -typevartuple_impl(PyTypeObject *type, PyObject *name) -/*[clinic end generated code: output=09d417a28f976202 input=00d28abcf1fc96bb]*/ +typevartuple_impl(PyTypeObject *type, PyObject *name, + PyObject *default_value) +/*[clinic end generated code: output=9d6b76dfe95aae51 input=e149739929a866d0]*/ { PyObject *module = caller(); if (module == NULL) { return NULL; } - PyObject *result = (PyObject *)typevartuple_alloc(name, module); + PyObject *result = (PyObject *)typevartuple_alloc(name, module, default_value); Py_DECREF(module); return result; } @@ -1148,6 +1379,23 @@ typevartuple_reduce_impl(typevartupleobject *self) return Py_NewRef(self->name); } + +/*[clinic input] +typevartuple.has_default as typevartuple_has_default + +[clinic start generated code]*/ + +static PyObject * +typevartuple_has_default_impl(typevartupleobject *self) +/*[clinic end generated code: output=4895f602f56a5e29 input=9ef3250ddb2c1851]*/ +{ + if (self->evaluate_default != NULL || + (self->default_value != &_Py_NoDefaultStruct && self->default_value != NULL)) { + Py_RETURN_TRUE; + } + Py_RETURN_FALSE; +} + static PyObject * typevartuple_mro_entries(PyObject *self, PyObject *args) { @@ -1160,6 +1408,8 @@ static int typevartuple_traverse(PyObject *self, visitproc visit, void *arg) { Py_VISIT(Py_TYPE(self)); + Py_VISIT(((typevartupleobject *)self)->default_value); + Py_VISIT(((typevartupleobject *)self)->evaluate_default); PyObject_VisitManagedDict(self, visit, arg); return 0; } @@ -1167,14 +1417,36 @@ typevartuple_traverse(PyObject *self, visitproc visit, void *arg) static int typevartuple_clear(PyObject *self) { + Py_CLEAR(((typevartupleobject *)self)->default_value); + Py_CLEAR(((typevartupleobject *)self)->evaluate_default); PyObject_ClearManagedDict(self); return 0; } +static PyObject * +typevartuple_default(typevartupleobject *self, void *unused) +{ + if (self->default_value != NULL) { + return Py_NewRef(self->default_value); + } + if (self->evaluate_default == NULL) { + return &_Py_NoDefaultStruct; + } + PyObject *default_value = PyObject_CallNoArgs(self->evaluate_default); + self->default_value = Py_XNewRef(default_value); + return default_value; +} + +static PyGetSetDef typevartuple_getset[] = { + {"__default__", (getter)typevartuple_default, NULL, "The default value for this TypeVarTuple.", NULL}, + {0}, +}; + static PyMethodDef typevartuple_methods[] = { TYPEVARTUPLE_TYPING_SUBST_METHODDEF TYPEVARTUPLE_TYPING_PREPARE_SUBST_METHODDEF TYPEVARTUPLE_REDUCE_METHODDEF + TYPEVARTUPLE_HAS_DEFAULT_METHODDEF {"__mro_entries__", typevartuple_mro_entries, METH_O}, {0} }; @@ -1190,10 +1462,15 @@ where a single '*' indicates a type variable tuple::\n\ def move_first_element_to_last[T, *Ts](tup: tuple[T, *Ts]) -> tuple[*Ts, T]:\n\ return (*tup[1:], tup[0])\n\ \n\ +Type variables tuples can have default values:\n\ +\n\ + type AliasWithDefault[*Ts = (str, int)] = tuple[*Ts]\n\ +\n\ For compatibility with Python 3.11 and earlier, TypeVarTuple objects\n\ can also be created as follows::\n\ \n\ Ts = TypeVarTuple('Ts') # Can be given any name\n\ + DefaultTs = TypeVarTuple('Ts', default=(str, int))\n\ \n\ Just as a TypeVar (type variable) is a placeholder for a single type,\n\ a TypeVarTuple is a placeholder for an *arbitrary* number of types. For\n\ @@ -1218,6 +1495,7 @@ PyType_Slot typevartuple_slots[] = { {Py_tp_doc, (void *)typevartuple_doc}, {Py_tp_members, typevartuple_members}, {Py_tp_methods, typevartuple_methods}, + {Py_tp_getset, typevartuple_getset}, {Py_tp_new, typevartuple}, {Py_tp_iter, typevartuple_iter}, {Py_tp_repr, typevartuple_repr}, @@ -1241,21 +1519,21 @@ PyObject * _Py_make_typevar(PyObject *name, PyObject *evaluate_bound, PyObject *evaluate_constraints) { return (PyObject *)typevar_alloc(name, NULL, evaluate_bound, NULL, evaluate_constraints, - false, false, true, NULL); + NULL, false, false, true, NULL); } PyObject * _Py_make_paramspec(PyThreadState *Py_UNUSED(ignored), PyObject *v) { assert(PyUnicode_Check(v)); - return (PyObject *)paramspec_alloc(v, NULL, false, false, true, NULL); + return (PyObject *)paramspec_alloc(v, NULL, NULL, false, false, true, NULL); } PyObject * _Py_make_typevartuple(PyThreadState *Py_UNUSED(ignored), PyObject *v) { assert(PyUnicode_Check(v)); - return (PyObject *)typevartuple_alloc(v, NULL); + return (PyObject *)typevartuple_alloc(v, NULL, NULL); } static void @@ -1687,3 +1965,24 @@ void _Py_clear_generic_types(PyInterpreterState *interp) Py_CLEAR(interp->cached_objects.paramspecargs_type); Py_CLEAR(interp->cached_objects.paramspeckwargs_type); } + +PyObject * +_Py_set_typeparam_default(PyThreadState *ts, PyObject *typeparam, PyObject *evaluate_default) +{ + if (Py_IS_TYPE(typeparam, ts->interp->cached_objects.typevar_type)) { + Py_XSETREF(((typevarobject *)typeparam)->evaluate_default, Py_NewRef(evaluate_default)); + return Py_NewRef(typeparam); + } + else if (Py_IS_TYPE(typeparam, ts->interp->cached_objects.paramspec_type)) { + Py_XSETREF(((paramspecobject *)typeparam)->evaluate_default, Py_NewRef(evaluate_default)); + return Py_NewRef(typeparam); + } + else if (Py_IS_TYPE(typeparam, ts->interp->cached_objects.typevartuple_type)) { + Py_XSETREF(((typevartupleobject *)typeparam)->evaluate_default, Py_NewRef(evaluate_default)); + return Py_NewRef(typeparam); + } + else { + PyErr_Format(PyExc_TypeError, "Expected a type param, got %R", typeparam); + return NULL; + } +} diff --git a/Parser/Python.asdl b/Parser/Python.asdl index 0d15486727..80776ffe44 100644 --- a/Parser/Python.asdl +++ b/Parser/Python.asdl @@ -145,8 +145,8 @@ module Python type_ignore = TypeIgnore(int lineno, string tag) - type_param = TypeVar(identifier name, expr? bound) - | ParamSpec(identifier name) - | TypeVarTuple(identifier name) + type_param = TypeVar(identifier name, expr? bound, expr? default_value) + | ParamSpec(identifier name, expr? default_value) + | TypeVarTuple(identifier name, expr? default_value) attributes (int lineno, int col_offset, int end_lineno, int end_col_offset) } diff --git a/Parser/parser.c b/Parser/parser.c index 0715e9775a..e34fcada15 100644 --- a/Parser/parser.c +++ b/Parser/parser.c @@ -186,431 +186,433 @@ static char *soft_keywords[] = { #define type_param_seq_type 1099 #define type_param_type 1100 #define type_param_bound_type 1101 -#define expressions_type 1102 -#define expression_type 1103 -#define yield_expr_type 1104 -#define star_expressions_type 1105 -#define star_expression_type 1106 -#define star_named_expressions_type 1107 -#define star_named_expression_type 1108 -#define assignment_expression_type 1109 -#define named_expression_type 1110 -#define disjunction_type 1111 -#define conjunction_type 1112 -#define inversion_type 1113 -#define comparison_type 1114 -#define compare_op_bitwise_or_pair_type 1115 -#define eq_bitwise_or_type 1116 -#define noteq_bitwise_or_type 1117 -#define lte_bitwise_or_type 1118 -#define lt_bitwise_or_type 1119 -#define gte_bitwise_or_type 1120 -#define gt_bitwise_or_type 1121 -#define notin_bitwise_or_type 1122 -#define in_bitwise_or_type 1123 -#define isnot_bitwise_or_type 1124 -#define is_bitwise_or_type 1125 -#define bitwise_or_type 1126 // Left-recursive -#define bitwise_xor_type 1127 // Left-recursive -#define bitwise_and_type 1128 // Left-recursive -#define shift_expr_type 1129 // Left-recursive -#define sum_type 1130 // Left-recursive -#define term_type 1131 // Left-recursive -#define factor_type 1132 -#define power_type 1133 -#define await_primary_type 1134 -#define primary_type 1135 // Left-recursive -#define slices_type 1136 -#define slice_type 1137 -#define atom_type 1138 -#define group_type 1139 -#define lambdef_type 1140 -#define lambda_params_type 1141 -#define lambda_parameters_type 1142 -#define lambda_slash_no_default_type 1143 -#define lambda_slash_with_default_type 1144 -#define lambda_star_etc_type 1145 -#define lambda_kwds_type 1146 -#define lambda_param_no_default_type 1147 -#define lambda_param_with_default_type 1148 -#define lambda_param_maybe_default_type 1149 -#define lambda_param_type 1150 -#define fstring_middle_type 1151 -#define fstring_replacement_field_type 1152 -#define fstring_conversion_type 1153 -#define fstring_full_format_spec_type 1154 -#define fstring_format_spec_type 1155 -#define fstring_type 1156 -#define string_type 1157 -#define strings_type 1158 -#define list_type 1159 -#define tuple_type 1160 -#define set_type 1161 -#define dict_type 1162 -#define double_starred_kvpairs_type 1163 -#define double_starred_kvpair_type 1164 -#define kvpair_type 1165 -#define for_if_clauses_type 1166 -#define for_if_clause_type 1167 -#define listcomp_type 1168 -#define setcomp_type 1169 -#define genexp_type 1170 -#define dictcomp_type 1171 -#define arguments_type 1172 -#define args_type 1173 -#define kwargs_type 1174 -#define starred_expression_type 1175 -#define kwarg_or_starred_type 1176 -#define kwarg_or_double_starred_type 1177 -#define star_targets_type 1178 -#define star_targets_list_seq_type 1179 -#define star_targets_tuple_seq_type 1180 -#define star_target_type 1181 -#define target_with_star_atom_type 1182 -#define star_atom_type 1183 -#define single_target_type 1184 -#define single_subscript_attribute_target_type 1185 -#define t_primary_type 1186 // Left-recursive -#define t_lookahead_type 1187 -#define del_targets_type 1188 -#define del_target_type 1189 -#define del_t_atom_type 1190 -#define type_expressions_type 1191 -#define func_type_comment_type 1192 -#define invalid_arguments_type 1193 -#define invalid_kwarg_type 1194 -#define expression_without_invalid_type 1195 -#define invalid_legacy_expression_type 1196 -#define invalid_expression_type 1197 -#define invalid_named_expression_type 1198 -#define invalid_assignment_type 1199 -#define invalid_ann_assign_target_type 1200 -#define invalid_del_stmt_type 1201 -#define invalid_block_type 1202 -#define invalid_comprehension_type 1203 -#define invalid_dict_comprehension_type 1204 -#define invalid_parameters_type 1205 -#define invalid_default_type 1206 -#define invalid_star_etc_type 1207 -#define invalid_kwds_type 1208 -#define invalid_parameters_helper_type 1209 -#define invalid_lambda_parameters_type 1210 -#define invalid_lambda_parameters_helper_type 1211 -#define invalid_lambda_star_etc_type 1212 -#define invalid_lambda_kwds_type 1213 -#define invalid_double_type_comments_type 1214 -#define invalid_with_item_type 1215 -#define invalid_for_target_type 1216 -#define invalid_group_type 1217 -#define invalid_import_type 1218 -#define invalid_import_from_targets_type 1219 -#define invalid_compound_stmt_type 1220 -#define invalid_with_stmt_type 1221 -#define invalid_with_stmt_indent_type 1222 -#define invalid_try_stmt_type 1223 -#define invalid_except_stmt_type 1224 -#define invalid_finally_stmt_type 1225 -#define invalid_except_stmt_indent_type 1226 -#define invalid_except_star_stmt_indent_type 1227 -#define invalid_match_stmt_type 1228 -#define invalid_case_block_type 1229 -#define invalid_as_pattern_type 1230 -#define invalid_class_pattern_type 1231 -#define invalid_class_argument_pattern_type 1232 -#define invalid_if_stmt_type 1233 -#define invalid_elif_stmt_type 1234 -#define invalid_else_stmt_type 1235 -#define invalid_while_stmt_type 1236 -#define invalid_for_stmt_type 1237 -#define invalid_def_raw_type 1238 -#define invalid_class_def_raw_type 1239 -#define invalid_double_starred_kvpairs_type 1240 -#define invalid_kvpair_type 1241 -#define invalid_starred_expression_type 1242 -#define invalid_replacement_field_type 1243 -#define invalid_conversion_character_type 1244 -#define invalid_arithmetic_type 1245 -#define invalid_factor_type 1246 -#define _loop0_1_type 1247 -#define _loop0_2_type 1248 -#define _loop1_3_type 1249 -#define _loop0_5_type 1250 -#define _gather_4_type 1251 -#define _tmp_6_type 1252 -#define _tmp_7_type 1253 -#define _tmp_8_type 1254 -#define _tmp_9_type 1255 -#define _tmp_10_type 1256 -#define _tmp_11_type 1257 -#define _tmp_12_type 1258 -#define _tmp_13_type 1259 -#define _loop1_14_type 1260 -#define _tmp_15_type 1261 -#define _tmp_16_type 1262 -#define _tmp_17_type 1263 -#define _loop0_19_type 1264 -#define _gather_18_type 1265 -#define _loop0_21_type 1266 -#define _gather_20_type 1267 -#define _tmp_22_type 1268 -#define _tmp_23_type 1269 -#define _loop0_24_type 1270 -#define _loop1_25_type 1271 -#define _loop0_27_type 1272 -#define _gather_26_type 1273 -#define _tmp_28_type 1274 -#define _loop0_30_type 1275 -#define _gather_29_type 1276 -#define _tmp_31_type 1277 -#define _loop1_32_type 1278 -#define _tmp_33_type 1279 -#define _tmp_34_type 1280 -#define _tmp_35_type 1281 -#define _loop0_36_type 1282 -#define _loop0_37_type 1283 -#define _loop0_38_type 1284 -#define _loop1_39_type 1285 -#define _loop0_40_type 1286 -#define _loop1_41_type 1287 -#define _loop1_42_type 1288 -#define _loop1_43_type 1289 -#define _loop0_44_type 1290 -#define _loop1_45_type 1291 -#define _loop0_46_type 1292 -#define _loop1_47_type 1293 -#define _loop0_48_type 1294 -#define _loop0_49_type 1295 -#define _loop1_50_type 1296 -#define _loop0_52_type 1297 -#define _gather_51_type 1298 -#define _loop0_54_type 1299 -#define _gather_53_type 1300 -#define _loop0_56_type 1301 -#define _gather_55_type 1302 -#define _loop0_58_type 1303 -#define _gather_57_type 1304 -#define _tmp_59_type 1305 -#define _loop1_60_type 1306 -#define _loop1_61_type 1307 -#define _tmp_62_type 1308 -#define _tmp_63_type 1309 -#define _loop1_64_type 1310 -#define _loop0_66_type 1311 -#define _gather_65_type 1312 -#define _tmp_67_type 1313 -#define _tmp_68_type 1314 -#define _tmp_69_type 1315 -#define _tmp_70_type 1316 -#define _loop0_72_type 1317 -#define _gather_71_type 1318 -#define _loop0_74_type 1319 -#define _gather_73_type 1320 -#define _tmp_75_type 1321 -#define _loop0_77_type 1322 -#define _gather_76_type 1323 -#define _loop0_79_type 1324 -#define _gather_78_type 1325 -#define _loop0_81_type 1326 -#define _gather_80_type 1327 -#define _loop1_82_type 1328 -#define _loop1_83_type 1329 -#define _loop0_85_type 1330 -#define _gather_84_type 1331 -#define _loop1_86_type 1332 -#define _loop1_87_type 1333 -#define _loop1_88_type 1334 -#define _tmp_89_type 1335 -#define _loop0_91_type 1336 -#define _gather_90_type 1337 -#define _tmp_92_type 1338 -#define _tmp_93_type 1339 -#define _tmp_94_type 1340 -#define _tmp_95_type 1341 -#define _tmp_96_type 1342 -#define _tmp_97_type 1343 -#define _loop0_98_type 1344 -#define _loop0_99_type 1345 -#define _loop0_100_type 1346 -#define _loop1_101_type 1347 -#define _loop0_102_type 1348 -#define _loop1_103_type 1349 -#define _loop1_104_type 1350 -#define _loop1_105_type 1351 -#define _loop0_106_type 1352 -#define _loop1_107_type 1353 -#define _loop0_108_type 1354 -#define _loop1_109_type 1355 -#define _loop0_110_type 1356 -#define _loop1_111_type 1357 -#define _loop0_112_type 1358 -#define _loop0_113_type 1359 -#define _loop1_114_type 1360 -#define _tmp_115_type 1361 -#define _loop0_117_type 1362 -#define _gather_116_type 1363 -#define _loop1_118_type 1364 -#define _loop0_119_type 1365 -#define _loop0_120_type 1366 -#define _tmp_121_type 1367 -#define _tmp_122_type 1368 -#define _loop0_124_type 1369 -#define _gather_123_type 1370 -#define _tmp_125_type 1371 -#define _loop0_127_type 1372 -#define _gather_126_type 1373 -#define _loop0_129_type 1374 -#define _gather_128_type 1375 -#define _loop0_131_type 1376 -#define _gather_130_type 1377 -#define _loop0_133_type 1378 -#define _gather_132_type 1379 -#define _loop0_134_type 1380 -#define _loop0_136_type 1381 -#define _gather_135_type 1382 -#define _loop1_137_type 1383 -#define _tmp_138_type 1384 -#define _loop0_140_type 1385 -#define _gather_139_type 1386 -#define _loop0_142_type 1387 -#define _gather_141_type 1388 -#define _loop0_144_type 1389 -#define _gather_143_type 1390 -#define _loop0_146_type 1391 -#define _gather_145_type 1392 -#define _loop0_148_type 1393 -#define _gather_147_type 1394 -#define _tmp_149_type 1395 -#define _tmp_150_type 1396 -#define _loop0_152_type 1397 -#define _gather_151_type 1398 -#define _tmp_153_type 1399 -#define _tmp_154_type 1400 -#define _tmp_155_type 1401 -#define _tmp_156_type 1402 -#define _tmp_157_type 1403 -#define _tmp_158_type 1404 -#define _tmp_159_type 1405 -#define _tmp_160_type 1406 -#define _tmp_161_type 1407 -#define _tmp_162_type 1408 -#define _loop0_163_type 1409 -#define _loop0_164_type 1410 -#define _loop0_165_type 1411 -#define _tmp_166_type 1412 -#define _tmp_167_type 1413 -#define _tmp_168_type 1414 -#define _tmp_169_type 1415 -#define _loop0_170_type 1416 -#define _loop0_171_type 1417 -#define _loop0_172_type 1418 -#define _loop1_173_type 1419 -#define _tmp_174_type 1420 -#define _loop0_175_type 1421 -#define _tmp_176_type 1422 -#define _loop0_177_type 1423 -#define _loop1_178_type 1424 -#define _tmp_179_type 1425 -#define _tmp_180_type 1426 -#define _tmp_181_type 1427 -#define _loop0_182_type 1428 -#define _tmp_183_type 1429 -#define _tmp_184_type 1430 -#define _loop1_185_type 1431 -#define _tmp_186_type 1432 -#define _loop0_187_type 1433 -#define _loop0_188_type 1434 -#define _loop0_189_type 1435 -#define _loop0_191_type 1436 -#define _gather_190_type 1437 -#define _tmp_192_type 1438 -#define _loop0_193_type 1439 -#define _tmp_194_type 1440 -#define _loop0_195_type 1441 -#define _loop1_196_type 1442 -#define _loop1_197_type 1443 -#define _tmp_198_type 1444 -#define _tmp_199_type 1445 -#define _loop0_200_type 1446 -#define _tmp_201_type 1447 -#define _tmp_202_type 1448 -#define _tmp_203_type 1449 -#define _loop0_205_type 1450 -#define _gather_204_type 1451 -#define _loop0_207_type 1452 -#define _gather_206_type 1453 -#define _loop0_209_type 1454 -#define _gather_208_type 1455 -#define _loop0_211_type 1456 -#define _gather_210_type 1457 -#define _loop0_213_type 1458 -#define _gather_212_type 1459 -#define _tmp_214_type 1460 -#define _loop0_215_type 1461 -#define _loop1_216_type 1462 -#define _tmp_217_type 1463 -#define _loop0_218_type 1464 -#define _loop1_219_type 1465 -#define _tmp_220_type 1466 -#define _tmp_221_type 1467 -#define _tmp_222_type 1468 -#define _tmp_223_type 1469 -#define _tmp_224_type 1470 -#define _tmp_225_type 1471 -#define _tmp_226_type 1472 -#define _tmp_227_type 1473 -#define _tmp_228_type 1474 -#define _tmp_229_type 1475 -#define _loop0_231_type 1476 -#define _gather_230_type 1477 -#define _tmp_232_type 1478 -#define _tmp_233_type 1479 -#define _tmp_234_type 1480 -#define _tmp_235_type 1481 -#define _tmp_236_type 1482 -#define _tmp_237_type 1483 -#define _tmp_238_type 1484 -#define _loop0_239_type 1485 -#define _tmp_240_type 1486 -#define _tmp_241_type 1487 -#define _tmp_242_type 1488 -#define _tmp_243_type 1489 -#define _tmp_244_type 1490 -#define _tmp_245_type 1491 -#define _tmp_246_type 1492 -#define _tmp_247_type 1493 -#define _tmp_248_type 1494 -#define _tmp_249_type 1495 -#define _tmp_250_type 1496 -#define _tmp_251_type 1497 -#define _tmp_252_type 1498 -#define _tmp_253_type 1499 -#define _tmp_254_type 1500 -#define _tmp_255_type 1501 -#define _loop0_256_type 1502 -#define _tmp_257_type 1503 -#define _tmp_258_type 1504 -#define _tmp_259_type 1505 -#define _tmp_260_type 1506 -#define _tmp_261_type 1507 -#define _tmp_262_type 1508 -#define _tmp_263_type 1509 -#define _tmp_264_type 1510 -#define _tmp_265_type 1511 -#define _tmp_266_type 1512 -#define _tmp_267_type 1513 -#define _tmp_268_type 1514 -#define _tmp_269_type 1515 -#define _tmp_270_type 1516 -#define _tmp_271_type 1517 -#define _tmp_272_type 1518 -#define _loop0_274_type 1519 -#define _gather_273_type 1520 -#define _tmp_275_type 1521 -#define _tmp_276_type 1522 -#define _tmp_277_type 1523 -#define _tmp_278_type 1524 -#define _tmp_279_type 1525 -#define _tmp_280_type 1526 +#define type_param_default_type 1102 +#define type_param_starred_default_type 1103 +#define expressions_type 1104 +#define expression_type 1105 +#define yield_expr_type 1106 +#define star_expressions_type 1107 +#define star_expression_type 1108 +#define star_named_expressions_type 1109 +#define star_named_expression_type 1110 +#define assignment_expression_type 1111 +#define named_expression_type 1112 +#define disjunction_type 1113 +#define conjunction_type 1114 +#define inversion_type 1115 +#define comparison_type 1116 +#define compare_op_bitwise_or_pair_type 1117 +#define eq_bitwise_or_type 1118 +#define noteq_bitwise_or_type 1119 +#define lte_bitwise_or_type 1120 +#define lt_bitwise_or_type 1121 +#define gte_bitwise_or_type 1122 +#define gt_bitwise_or_type 1123 +#define notin_bitwise_or_type 1124 +#define in_bitwise_or_type 1125 +#define isnot_bitwise_or_type 1126 +#define is_bitwise_or_type 1127 +#define bitwise_or_type 1128 // Left-recursive +#define bitwise_xor_type 1129 // Left-recursive +#define bitwise_and_type 1130 // Left-recursive +#define shift_expr_type 1131 // Left-recursive +#define sum_type 1132 // Left-recursive +#define term_type 1133 // Left-recursive +#define factor_type 1134 +#define power_type 1135 +#define await_primary_type 1136 +#define primary_type 1137 // Left-recursive +#define slices_type 1138 +#define slice_type 1139 +#define atom_type 1140 +#define group_type 1141 +#define lambdef_type 1142 +#define lambda_params_type 1143 +#define lambda_parameters_type 1144 +#define lambda_slash_no_default_type 1145 +#define lambda_slash_with_default_type 1146 +#define lambda_star_etc_type 1147 +#define lambda_kwds_type 1148 +#define lambda_param_no_default_type 1149 +#define lambda_param_with_default_type 1150 +#define lambda_param_maybe_default_type 1151 +#define lambda_param_type 1152 +#define fstring_middle_type 1153 +#define fstring_replacement_field_type 1154 +#define fstring_conversion_type 1155 +#define fstring_full_format_spec_type 1156 +#define fstring_format_spec_type 1157 +#define fstring_type 1158 +#define string_type 1159 +#define strings_type 1160 +#define list_type 1161 +#define tuple_type 1162 +#define set_type 1163 +#define dict_type 1164 +#define double_starred_kvpairs_type 1165 +#define double_starred_kvpair_type 1166 +#define kvpair_type 1167 +#define for_if_clauses_type 1168 +#define for_if_clause_type 1169 +#define listcomp_type 1170 +#define setcomp_type 1171 +#define genexp_type 1172 +#define dictcomp_type 1173 +#define arguments_type 1174 +#define args_type 1175 +#define kwargs_type 1176 +#define starred_expression_type 1177 +#define kwarg_or_starred_type 1178 +#define kwarg_or_double_starred_type 1179 +#define star_targets_type 1180 +#define star_targets_list_seq_type 1181 +#define star_targets_tuple_seq_type 1182 +#define star_target_type 1183 +#define target_with_star_atom_type 1184 +#define star_atom_type 1185 +#define single_target_type 1186 +#define single_subscript_attribute_target_type 1187 +#define t_primary_type 1188 // Left-recursive +#define t_lookahead_type 1189 +#define del_targets_type 1190 +#define del_target_type 1191 +#define del_t_atom_type 1192 +#define type_expressions_type 1193 +#define func_type_comment_type 1194 +#define invalid_arguments_type 1195 +#define invalid_kwarg_type 1196 +#define expression_without_invalid_type 1197 +#define invalid_legacy_expression_type 1198 +#define invalid_expression_type 1199 +#define invalid_named_expression_type 1200 +#define invalid_assignment_type 1201 +#define invalid_ann_assign_target_type 1202 +#define invalid_del_stmt_type 1203 +#define invalid_block_type 1204 +#define invalid_comprehension_type 1205 +#define invalid_dict_comprehension_type 1206 +#define invalid_parameters_type 1207 +#define invalid_default_type 1208 +#define invalid_star_etc_type 1209 +#define invalid_kwds_type 1210 +#define invalid_parameters_helper_type 1211 +#define invalid_lambda_parameters_type 1212 +#define invalid_lambda_parameters_helper_type 1213 +#define invalid_lambda_star_etc_type 1214 +#define invalid_lambda_kwds_type 1215 +#define invalid_double_type_comments_type 1216 +#define invalid_with_item_type 1217 +#define invalid_for_target_type 1218 +#define invalid_group_type 1219 +#define invalid_import_type 1220 +#define invalid_import_from_targets_type 1221 +#define invalid_compound_stmt_type 1222 +#define invalid_with_stmt_type 1223 +#define invalid_with_stmt_indent_type 1224 +#define invalid_try_stmt_type 1225 +#define invalid_except_stmt_type 1226 +#define invalid_finally_stmt_type 1227 +#define invalid_except_stmt_indent_type 1228 +#define invalid_except_star_stmt_indent_type 1229 +#define invalid_match_stmt_type 1230 +#define invalid_case_block_type 1231 +#define invalid_as_pattern_type 1232 +#define invalid_class_pattern_type 1233 +#define invalid_class_argument_pattern_type 1234 +#define invalid_if_stmt_type 1235 +#define invalid_elif_stmt_type 1236 +#define invalid_else_stmt_type 1237 +#define invalid_while_stmt_type 1238 +#define invalid_for_stmt_type 1239 +#define invalid_def_raw_type 1240 +#define invalid_class_def_raw_type 1241 +#define invalid_double_starred_kvpairs_type 1242 +#define invalid_kvpair_type 1243 +#define invalid_starred_expression_type 1244 +#define invalid_replacement_field_type 1245 +#define invalid_conversion_character_type 1246 +#define invalid_arithmetic_type 1247 +#define invalid_factor_type 1248 +#define _loop0_1_type 1249 +#define _loop0_2_type 1250 +#define _loop1_3_type 1251 +#define _loop0_5_type 1252 +#define _gather_4_type 1253 +#define _tmp_6_type 1254 +#define _tmp_7_type 1255 +#define _tmp_8_type 1256 +#define _tmp_9_type 1257 +#define _tmp_10_type 1258 +#define _tmp_11_type 1259 +#define _tmp_12_type 1260 +#define _tmp_13_type 1261 +#define _loop1_14_type 1262 +#define _tmp_15_type 1263 +#define _tmp_16_type 1264 +#define _tmp_17_type 1265 +#define _loop0_19_type 1266 +#define _gather_18_type 1267 +#define _loop0_21_type 1268 +#define _gather_20_type 1269 +#define _tmp_22_type 1270 +#define _tmp_23_type 1271 +#define _loop0_24_type 1272 +#define _loop1_25_type 1273 +#define _loop0_27_type 1274 +#define _gather_26_type 1275 +#define _tmp_28_type 1276 +#define _loop0_30_type 1277 +#define _gather_29_type 1278 +#define _tmp_31_type 1279 +#define _loop1_32_type 1280 +#define _tmp_33_type 1281 +#define _tmp_34_type 1282 +#define _tmp_35_type 1283 +#define _loop0_36_type 1284 +#define _loop0_37_type 1285 +#define _loop0_38_type 1286 +#define _loop1_39_type 1287 +#define _loop0_40_type 1288 +#define _loop1_41_type 1289 +#define _loop1_42_type 1290 +#define _loop1_43_type 1291 +#define _loop0_44_type 1292 +#define _loop1_45_type 1293 +#define _loop0_46_type 1294 +#define _loop1_47_type 1295 +#define _loop0_48_type 1296 +#define _loop0_49_type 1297 +#define _loop1_50_type 1298 +#define _loop0_52_type 1299 +#define _gather_51_type 1300 +#define _loop0_54_type 1301 +#define _gather_53_type 1302 +#define _loop0_56_type 1303 +#define _gather_55_type 1304 +#define _loop0_58_type 1305 +#define _gather_57_type 1306 +#define _tmp_59_type 1307 +#define _loop1_60_type 1308 +#define _loop1_61_type 1309 +#define _tmp_62_type 1310 +#define _tmp_63_type 1311 +#define _loop1_64_type 1312 +#define _loop0_66_type 1313 +#define _gather_65_type 1314 +#define _tmp_67_type 1315 +#define _tmp_68_type 1316 +#define _tmp_69_type 1317 +#define _tmp_70_type 1318 +#define _loop0_72_type 1319 +#define _gather_71_type 1320 +#define _loop0_74_type 1321 +#define _gather_73_type 1322 +#define _tmp_75_type 1323 +#define _loop0_77_type 1324 +#define _gather_76_type 1325 +#define _loop0_79_type 1326 +#define _gather_78_type 1327 +#define _loop0_81_type 1328 +#define _gather_80_type 1329 +#define _loop1_82_type 1330 +#define _loop1_83_type 1331 +#define _loop0_85_type 1332 +#define _gather_84_type 1333 +#define _loop1_86_type 1334 +#define _loop1_87_type 1335 +#define _loop1_88_type 1336 +#define _tmp_89_type 1337 +#define _loop0_91_type 1338 +#define _gather_90_type 1339 +#define _tmp_92_type 1340 +#define _tmp_93_type 1341 +#define _tmp_94_type 1342 +#define _tmp_95_type 1343 +#define _tmp_96_type 1344 +#define _tmp_97_type 1345 +#define _loop0_98_type 1346 +#define _loop0_99_type 1347 +#define _loop0_100_type 1348 +#define _loop1_101_type 1349 +#define _loop0_102_type 1350 +#define _loop1_103_type 1351 +#define _loop1_104_type 1352 +#define _loop1_105_type 1353 +#define _loop0_106_type 1354 +#define _loop1_107_type 1355 +#define _loop0_108_type 1356 +#define _loop1_109_type 1357 +#define _loop0_110_type 1358 +#define _loop1_111_type 1359 +#define _loop0_112_type 1360 +#define _loop0_113_type 1361 +#define _loop1_114_type 1362 +#define _tmp_115_type 1363 +#define _loop0_117_type 1364 +#define _gather_116_type 1365 +#define _loop1_118_type 1366 +#define _loop0_119_type 1367 +#define _loop0_120_type 1368 +#define _tmp_121_type 1369 +#define _tmp_122_type 1370 +#define _loop0_124_type 1371 +#define _gather_123_type 1372 +#define _tmp_125_type 1373 +#define _loop0_127_type 1374 +#define _gather_126_type 1375 +#define _loop0_129_type 1376 +#define _gather_128_type 1377 +#define _loop0_131_type 1378 +#define _gather_130_type 1379 +#define _loop0_133_type 1380 +#define _gather_132_type 1381 +#define _loop0_134_type 1382 +#define _loop0_136_type 1383 +#define _gather_135_type 1384 +#define _loop1_137_type 1385 +#define _tmp_138_type 1386 +#define _loop0_140_type 1387 +#define _gather_139_type 1388 +#define _loop0_142_type 1389 +#define _gather_141_type 1390 +#define _loop0_144_type 1391 +#define _gather_143_type 1392 +#define _loop0_146_type 1393 +#define _gather_145_type 1394 +#define _loop0_148_type 1395 +#define _gather_147_type 1396 +#define _tmp_149_type 1397 +#define _tmp_150_type 1398 +#define _loop0_152_type 1399 +#define _gather_151_type 1400 +#define _tmp_153_type 1401 +#define _tmp_154_type 1402 +#define _tmp_155_type 1403 +#define _tmp_156_type 1404 +#define _tmp_157_type 1405 +#define _tmp_158_type 1406 +#define _tmp_159_type 1407 +#define _tmp_160_type 1408 +#define _tmp_161_type 1409 +#define _tmp_162_type 1410 +#define _loop0_163_type 1411 +#define _loop0_164_type 1412 +#define _loop0_165_type 1413 +#define _tmp_166_type 1414 +#define _tmp_167_type 1415 +#define _tmp_168_type 1416 +#define _tmp_169_type 1417 +#define _loop0_170_type 1418 +#define _loop0_171_type 1419 +#define _loop0_172_type 1420 +#define _loop1_173_type 1421 +#define _tmp_174_type 1422 +#define _loop0_175_type 1423 +#define _tmp_176_type 1424 +#define _loop0_177_type 1425 +#define _loop1_178_type 1426 +#define _tmp_179_type 1427 +#define _tmp_180_type 1428 +#define _tmp_181_type 1429 +#define _loop0_182_type 1430 +#define _tmp_183_type 1431 +#define _tmp_184_type 1432 +#define _loop1_185_type 1433 +#define _tmp_186_type 1434 +#define _loop0_187_type 1435 +#define _loop0_188_type 1436 +#define _loop0_189_type 1437 +#define _loop0_191_type 1438 +#define _gather_190_type 1439 +#define _tmp_192_type 1440 +#define _loop0_193_type 1441 +#define _tmp_194_type 1442 +#define _loop0_195_type 1443 +#define _loop1_196_type 1444 +#define _loop1_197_type 1445 +#define _tmp_198_type 1446 +#define _tmp_199_type 1447 +#define _loop0_200_type 1448 +#define _tmp_201_type 1449 +#define _tmp_202_type 1450 +#define _tmp_203_type 1451 +#define _loop0_205_type 1452 +#define _gather_204_type 1453 +#define _loop0_207_type 1454 +#define _gather_206_type 1455 +#define _loop0_209_type 1456 +#define _gather_208_type 1457 +#define _loop0_211_type 1458 +#define _gather_210_type 1459 +#define _loop0_213_type 1460 +#define _gather_212_type 1461 +#define _tmp_214_type 1462 +#define _loop0_215_type 1463 +#define _loop1_216_type 1464 +#define _tmp_217_type 1465 +#define _loop0_218_type 1466 +#define _loop1_219_type 1467 +#define _tmp_220_type 1468 +#define _tmp_221_type 1469 +#define _tmp_222_type 1470 +#define _tmp_223_type 1471 +#define _tmp_224_type 1472 +#define _tmp_225_type 1473 +#define _tmp_226_type 1474 +#define _tmp_227_type 1475 +#define _tmp_228_type 1476 +#define _tmp_229_type 1477 +#define _loop0_231_type 1478 +#define _gather_230_type 1479 +#define _tmp_232_type 1480 +#define _tmp_233_type 1481 +#define _tmp_234_type 1482 +#define _tmp_235_type 1483 +#define _tmp_236_type 1484 +#define _tmp_237_type 1485 +#define _tmp_238_type 1486 +#define _loop0_239_type 1487 +#define _tmp_240_type 1488 +#define _tmp_241_type 1489 +#define _tmp_242_type 1490 +#define _tmp_243_type 1491 +#define _tmp_244_type 1492 +#define _tmp_245_type 1493 +#define _tmp_246_type 1494 +#define _tmp_247_type 1495 +#define _tmp_248_type 1496 +#define _tmp_249_type 1497 +#define _tmp_250_type 1498 +#define _tmp_251_type 1499 +#define _tmp_252_type 1500 +#define _tmp_253_type 1501 +#define _tmp_254_type 1502 +#define _tmp_255_type 1503 +#define _loop0_256_type 1504 +#define _tmp_257_type 1505 +#define _tmp_258_type 1506 +#define _tmp_259_type 1507 +#define _tmp_260_type 1508 +#define _tmp_261_type 1509 +#define _tmp_262_type 1510 +#define _tmp_263_type 1511 +#define _tmp_264_type 1512 +#define _tmp_265_type 1513 +#define _tmp_266_type 1514 +#define _tmp_267_type 1515 +#define _tmp_268_type 1516 +#define _tmp_269_type 1517 +#define _tmp_270_type 1518 +#define _tmp_271_type 1519 +#define _tmp_272_type 1520 +#define _loop0_274_type 1521 +#define _gather_273_type 1522 +#define _tmp_275_type 1523 +#define _tmp_276_type 1524 +#define _tmp_277_type 1525 +#define _tmp_278_type 1526 +#define _tmp_279_type 1527 +#define _tmp_280_type 1528 static mod_ty file_rule(Parser *p); static mod_ty interactive_rule(Parser *p); @@ -714,6 +716,8 @@ static asdl_type_param_seq* type_params_rule(Parser *p); static asdl_type_param_seq* type_param_seq_rule(Parser *p); static type_param_ty type_param_rule(Parser *p); static expr_ty type_param_bound_rule(Parser *p); +static expr_ty type_param_default_rule(Parser *p); +static expr_ty type_param_starred_default_rule(Parser *p); static expr_ty expressions_rule(Parser *p); static expr_ty expression_rule(Parser *p); static expr_ty yield_expr_rule(Parser *p); @@ -10646,11 +10650,11 @@ type_param_seq_rule(Parser *p) } // type_param: -// | NAME type_param_bound? +// | NAME type_param_bound? type_param_default? // | '*' NAME ':' expression -// | '*' NAME +// | '*' NAME type_param_starred_default? // | '**' NAME ':' expression -// | '**' NAME +// | '**' NAME type_param_default? static type_param_ty type_param_rule(Parser *p) { @@ -10676,21 +10680,24 @@ type_param_rule(Parser *p) UNUSED(_start_lineno); // Only used by EXTRA macro int _start_col_offset = p->tokens[_mark]->col_offset; UNUSED(_start_col_offset); // Only used by EXTRA macro - { // NAME type_param_bound? + { // NAME type_param_bound? type_param_default? if (p->error_indicator) { p->level--; return NULL; } - D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "NAME type_param_bound?")); + D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "NAME type_param_bound? type_param_default?")); expr_ty a; void *b; + void *c; if ( (a = _PyPegen_name_token(p)) // NAME && (b = type_param_bound_rule(p), !p->error_indicator) // type_param_bound? + && + (c = type_param_default_rule(p), !p->error_indicator) // type_param_default? ) { - D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "NAME type_param_bound?")); + D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "NAME type_param_bound? type_param_default?")); Token *_token = _PyPegen_get_last_nonnwhitespace_token(p); if (_token == NULL) { p->level--; @@ -10700,7 +10707,7 @@ type_param_rule(Parser *p) UNUSED(_end_lineno); // Only used by EXTRA macro int _end_col_offset = _token->end_col_offset; UNUSED(_end_col_offset); // Only used by EXTRA macro - _res = _PyAST_TypeVar ( a -> v . Name . id , b , EXTRA ); + _res = _PyAST_TypeVar ( a -> v . Name . id , b , c , EXTRA ); if (_res == NULL && PyErr_Occurred()) { p->error_indicator = 1; p->level--; @@ -10710,7 +10717,7 @@ type_param_rule(Parser *p) } p->mark = _mark; D(fprintf(stderr, "%*c%s type_param[%d-%d]: %s failed!\n", p->level, ' ', - p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "NAME type_param_bound?")); + p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "NAME type_param_bound? type_param_default?")); } { // '*' NAME ':' expression if (p->error_indicator) { @@ -10745,21 +10752,24 @@ type_param_rule(Parser *p) D(fprintf(stderr, "%*c%s type_param[%d-%d]: %s failed!\n", p->level, ' ', p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'*' NAME ':' expression")); } - { // '*' NAME + { // '*' NAME type_param_starred_default? if (p->error_indicator) { p->level--; return NULL; } - D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'*' NAME")); + D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'*' NAME type_param_starred_default?")); Token * _literal; expr_ty a; + void *b; if ( (_literal = _PyPegen_expect_token(p, 16)) // token='*' && (a = _PyPegen_name_token(p)) // NAME + && + (b = type_param_starred_default_rule(p), !p->error_indicator) // type_param_starred_default? ) { - D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'*' NAME")); + D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'*' NAME type_param_starred_default?")); Token *_token = _PyPegen_get_last_nonnwhitespace_token(p); if (_token == NULL) { p->level--; @@ -10769,7 +10779,7 @@ type_param_rule(Parser *p) UNUSED(_end_lineno); // Only used by EXTRA macro int _end_col_offset = _token->end_col_offset; UNUSED(_end_col_offset); // Only used by EXTRA macro - _res = _PyAST_TypeVarTuple ( a -> v . Name . id , EXTRA ); + _res = _PyAST_TypeVarTuple ( a -> v . Name . id , b , EXTRA ); if (_res == NULL && PyErr_Occurred()) { p->error_indicator = 1; p->level--; @@ -10779,7 +10789,7 @@ type_param_rule(Parser *p) } p->mark = _mark; D(fprintf(stderr, "%*c%s type_param[%d-%d]: %s failed!\n", p->level, ' ', - p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'*' NAME")); + p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'*' NAME type_param_starred_default?")); } { // '**' NAME ':' expression if (p->error_indicator) { @@ -10814,21 +10824,24 @@ type_param_rule(Parser *p) D(fprintf(stderr, "%*c%s type_param[%d-%d]: %s failed!\n", p->level, ' ', p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'**' NAME ':' expression")); } - { // '**' NAME + { // '**' NAME type_param_default? if (p->error_indicator) { p->level--; return NULL; } - D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'**' NAME")); + D(fprintf(stderr, "%*c> type_param[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'**' NAME type_param_default?")); Token * _literal; expr_ty a; + void *b; if ( (_literal = _PyPegen_expect_token(p, 35)) // token='**' && (a = _PyPegen_name_token(p)) // NAME + && + (b = type_param_default_rule(p), !p->error_indicator) // type_param_default? ) { - D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'**' NAME")); + D(fprintf(stderr, "%*c+ type_param[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'**' NAME type_param_default?")); Token *_token = _PyPegen_get_last_nonnwhitespace_token(p); if (_token == NULL) { p->level--; @@ -10838,7 +10851,7 @@ type_param_rule(Parser *p) UNUSED(_end_lineno); // Only used by EXTRA macro int _end_col_offset = _token->end_col_offset; UNUSED(_end_col_offset); // Only used by EXTRA macro - _res = _PyAST_ParamSpec ( a -> v . Name . id , EXTRA ); + _res = _PyAST_ParamSpec ( a -> v . Name . id , b , EXTRA ); if (_res == NULL && PyErr_Occurred()) { p->error_indicator = 1; p->level--; @@ -10848,7 +10861,7 @@ type_param_rule(Parser *p) } p->mark = _mark; D(fprintf(stderr, "%*c%s type_param[%d-%d]: %s failed!\n", p->level, ' ', - p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'**' NAME")); + p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'**' NAME type_param_default?")); } _res = NULL; done: @@ -10903,6 +10916,98 @@ type_param_bound_rule(Parser *p) return _res; } +// type_param_default: '=' expression +static expr_ty +type_param_default_rule(Parser *p) +{ + if (p->level++ == MAXSTACK) { + _Pypegen_stack_overflow(p); + } + if (p->error_indicator) { + p->level--; + return NULL; + } + expr_ty _res = NULL; + int _mark = p->mark; + { // '=' expression + if (p->error_indicator) { + p->level--; + return NULL; + } + D(fprintf(stderr, "%*c> type_param_default[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'=' expression")); + Token * _literal; + expr_ty e; + if ( + (_literal = _PyPegen_expect_token(p, 22)) // token='=' + && + (e = expression_rule(p)) // expression + ) + { + D(fprintf(stderr, "%*c+ type_param_default[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'=' expression")); + _res = CHECK_VERSION ( expr_ty , 13 , "Type parameter defaults are" , e ); + if (_res == NULL && PyErr_Occurred()) { + p->error_indicator = 1; + p->level--; + return NULL; + } + goto done; + } + p->mark = _mark; + D(fprintf(stderr, "%*c%s type_param_default[%d-%d]: %s failed!\n", p->level, ' ', + p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'=' expression")); + } + _res = NULL; + done: + p->level--; + return _res; +} + +// type_param_starred_default: '=' star_expression +static expr_ty +type_param_starred_default_rule(Parser *p) +{ + if (p->level++ == MAXSTACK) { + _Pypegen_stack_overflow(p); + } + if (p->error_indicator) { + p->level--; + return NULL; + } + expr_ty _res = NULL; + int _mark = p->mark; + { // '=' star_expression + if (p->error_indicator) { + p->level--; + return NULL; + } + D(fprintf(stderr, "%*c> type_param_starred_default[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "'=' star_expression")); + Token * _literal; + expr_ty e; + if ( + (_literal = _PyPegen_expect_token(p, 22)) // token='=' + && + (e = star_expression_rule(p)) // star_expression + ) + { + D(fprintf(stderr, "%*c+ type_param_starred_default[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "'=' star_expression")); + _res = CHECK_VERSION ( expr_ty , 13 , "Type parameter defaults are" , e ); + if (_res == NULL && PyErr_Occurred()) { + p->error_indicator = 1; + p->level--; + return NULL; + } + goto done; + } + p->mark = _mark; + D(fprintf(stderr, "%*c%s type_param_starred_default[%d-%d]: %s failed!\n", p->level, ' ', + p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "'=' star_expression")); + } + _res = NULL; + done: + p->level--; + return _res; +} + // expressions: expression ((',' expression))+ ','? | expression ',' | expression static expr_ty expressions_rule(Parser *p) diff --git a/Python/Python-ast.c b/Python/Python-ast.c index 60b46263a0..cc7734e0db 100644 --- a/Python/Python-ast.c +++ b/Python/Python-ast.c @@ -203,6 +203,7 @@ void _PyAST_Fini(PyInterpreterState *interp) Py_CLEAR(state->conversion); Py_CLEAR(state->ctx); Py_CLEAR(state->decorator_list); + Py_CLEAR(state->default_value); Py_CLEAR(state->defaults); Py_CLEAR(state->elt); Py_CLEAR(state->elts); @@ -311,6 +312,7 @@ static int init_identifiers(struct ast_state *state) if ((state->conversion = PyUnicode_InternFromString("conversion")) == NULL) return -1; if ((state->ctx = PyUnicode_InternFromString("ctx")) == NULL) return -1; if ((state->decorator_list = PyUnicode_InternFromString("decorator_list")) == NULL) return -1; + if ((state->default_value = PyUnicode_InternFromString("default_value")) == NULL) return -1; if ((state->defaults = PyUnicode_InternFromString("defaults")) == NULL) return -1; if ((state->elt = PyUnicode_InternFromString("elt")) == NULL) return -1; if ((state->elts = PyUnicode_InternFromString("elts")) == NULL) return -1; @@ -809,12 +811,15 @@ static PyObject* ast2obj_type_param(struct ast_state *state, struct validator static const char * const TypeVar_fields[]={ "name", "bound", + "default_value", }; static const char * const ParamSpec_fields[]={ "name", + "default_value", }; static const char * const TypeVarTuple_fields[]={ "name", + "default_value", }; @@ -4913,6 +4918,22 @@ add_ast_annotations(struct ast_state *state) return 0; } } + { + PyObject *type = state->expr_type; + type = _Py_union_type_or(type, Py_None); + cond = type != NULL; + if (!cond) { + Py_DECREF(TypeVar_annotations); + return 0; + } + cond = PyDict_SetItemString(TypeVar_annotations, "default_value", type) + == 0; + Py_DECREF(type); + if (!cond) { + Py_DECREF(TypeVar_annotations); + return 0; + } + } cond = PyObject_SetAttrString(state->TypeVar_type, "_field_types", TypeVar_annotations) == 0; if (!cond) { @@ -4938,6 +4959,22 @@ add_ast_annotations(struct ast_state *state) return 0; } } + { + PyObject *type = state->expr_type; + type = _Py_union_type_or(type, Py_None); + cond = type != NULL; + if (!cond) { + Py_DECREF(ParamSpec_annotations); + return 0; + } + cond = PyDict_SetItemString(ParamSpec_annotations, "default_value", + type) == 0; + Py_DECREF(type); + if (!cond) { + Py_DECREF(ParamSpec_annotations); + return 0; + } + } cond = PyObject_SetAttrString(state->ParamSpec_type, "_field_types", ParamSpec_annotations) == 0; if (!cond) { @@ -4964,6 +5001,22 @@ add_ast_annotations(struct ast_state *state) return 0; } } + { + PyObject *type = state->expr_type; + type = _Py_union_type_or(type, Py_None); + cond = type != NULL; + if (!cond) { + Py_DECREF(TypeVarTuple_annotations); + return 0; + } + cond = PyDict_SetItemString(TypeVarTuple_annotations, "default_value", + type) == 0; + Py_DECREF(type); + if (!cond) { + Py_DECREF(TypeVarTuple_annotations); + return 0; + } + } cond = PyObject_SetAttrString(state->TypeVarTuple_type, "_field_types", TypeVarTuple_annotations) == 0; if (!cond) { @@ -6243,28 +6296,37 @@ init_types(struct ast_state *state) if (!state->TypeIgnore_type) return -1; state->type_param_type = make_type(state, "type_param", state->AST_type, NULL, 0, - "type_param = TypeVar(identifier name, expr? bound)\n" - " | ParamSpec(identifier name)\n" - " | TypeVarTuple(identifier name)"); + "type_param = TypeVar(identifier name, expr? bound, expr? default_value)\n" + " | ParamSpec(identifier name, expr? default_value)\n" + " | TypeVarTuple(identifier name, expr? default_value)"); if (!state->type_param_type) return -1; if (add_attributes(state, state->type_param_type, type_param_attributes, 4) < 0) return -1; state->TypeVar_type = make_type(state, "TypeVar", state->type_param_type, - TypeVar_fields, 2, - "TypeVar(identifier name, expr? bound)"); + TypeVar_fields, 3, + "TypeVar(identifier name, expr? bound, expr? default_value)"); if (!state->TypeVar_type) return -1; if (PyObject_SetAttr(state->TypeVar_type, state->bound, Py_None) == -1) return -1; + if (PyObject_SetAttr(state->TypeVar_type, state->default_value, Py_None) == + -1) + return -1; state->ParamSpec_type = make_type(state, "ParamSpec", state->type_param_type, ParamSpec_fields, - 1, - "ParamSpec(identifier name)"); + 2, + "ParamSpec(identifier name, expr? default_value)"); if (!state->ParamSpec_type) return -1; + if (PyObject_SetAttr(state->ParamSpec_type, state->default_value, Py_None) + == -1) + return -1; state->TypeVarTuple_type = make_type(state, "TypeVarTuple", state->type_param_type, - TypeVarTuple_fields, 1, - "TypeVarTuple(identifier name)"); + TypeVarTuple_fields, 2, + "TypeVarTuple(identifier name, expr? default_value)"); if (!state->TypeVarTuple_type) return -1; + if (PyObject_SetAttr(state->TypeVarTuple_type, state->default_value, + Py_None) == -1) + return -1; if (!add_ast_annotations(state)) { return -1; @@ -8055,8 +8117,9 @@ _PyAST_TypeIgnore(int lineno, string tag, PyArena *arena) } type_param_ty -_PyAST_TypeVar(identifier name, expr_ty bound, int lineno, int col_offset, int - end_lineno, int end_col_offset, PyArena *arena) +_PyAST_TypeVar(identifier name, expr_ty bound, expr_ty default_value, int + lineno, int col_offset, int end_lineno, int end_col_offset, + PyArena *arena) { type_param_ty p; if (!name) { @@ -8070,6 +8133,7 @@ _PyAST_TypeVar(identifier name, expr_ty bound, int lineno, int col_offset, int p->kind = TypeVar_kind; p->v.TypeVar.name = name; p->v.TypeVar.bound = bound; + p->v.TypeVar.default_value = default_value; p->lineno = lineno; p->col_offset = col_offset; p->end_lineno = end_lineno; @@ -8078,8 +8142,8 @@ _PyAST_TypeVar(identifier name, expr_ty bound, int lineno, int col_offset, int } type_param_ty -_PyAST_ParamSpec(identifier name, int lineno, int col_offset, int end_lineno, - int end_col_offset, PyArena *arena) +_PyAST_ParamSpec(identifier name, expr_ty default_value, int lineno, int + col_offset, int end_lineno, int end_col_offset, PyArena *arena) { type_param_ty p; if (!name) { @@ -8092,6 +8156,7 @@ _PyAST_ParamSpec(identifier name, int lineno, int col_offset, int end_lineno, return NULL; p->kind = ParamSpec_kind; p->v.ParamSpec.name = name; + p->v.ParamSpec.default_value = default_value; p->lineno = lineno; p->col_offset = col_offset; p->end_lineno = end_lineno; @@ -8100,8 +8165,9 @@ _PyAST_ParamSpec(identifier name, int lineno, int col_offset, int end_lineno, } type_param_ty -_PyAST_TypeVarTuple(identifier name, int lineno, int col_offset, int - end_lineno, int end_col_offset, PyArena *arena) +_PyAST_TypeVarTuple(identifier name, expr_ty default_value, int lineno, int + col_offset, int end_lineno, int end_col_offset, PyArena + *arena) { type_param_ty p; if (!name) { @@ -8114,6 +8180,7 @@ _PyAST_TypeVarTuple(identifier name, int lineno, int col_offset, int return NULL; p->kind = TypeVarTuple_kind; p->v.TypeVarTuple.name = name; + p->v.TypeVarTuple.default_value = default_value; p->lineno = lineno; p->col_offset = col_offset; p->end_lineno = end_lineno; @@ -10079,6 +10146,11 @@ ast2obj_type_param(struct ast_state *state, struct validator *vstate, void* _o) if (PyObject_SetAttr(result, state->bound, value) == -1) goto failed; Py_DECREF(value); + value = ast2obj_expr(state, vstate, o->v.TypeVar.default_value); + if (!value) goto failed; + if (PyObject_SetAttr(result, state->default_value, value) == -1) + goto failed; + Py_DECREF(value); break; case ParamSpec_kind: tp = (PyTypeObject *)state->ParamSpec_type; @@ -10089,6 +10161,11 @@ ast2obj_type_param(struct ast_state *state, struct validator *vstate, void* _o) if (PyObject_SetAttr(result, state->name, value) == -1) goto failed; Py_DECREF(value); + value = ast2obj_expr(state, vstate, o->v.ParamSpec.default_value); + if (!value) goto failed; + if (PyObject_SetAttr(result, state->default_value, value) == -1) + goto failed; + Py_DECREF(value); break; case TypeVarTuple_kind: tp = (PyTypeObject *)state->TypeVarTuple_type; @@ -10099,6 +10176,11 @@ ast2obj_type_param(struct ast_state *state, struct validator *vstate, void* _o) if (PyObject_SetAttr(result, state->name, value) == -1) goto failed; Py_DECREF(value); + value = ast2obj_expr(state, vstate, o->v.TypeVarTuple.default_value); + if (!value) goto failed; + if (PyObject_SetAttr(result, state->default_value, value) == -1) + goto failed; + Py_DECREF(value); break; } value = ast2obj_int(state, vstate, o->lineno); @@ -16935,6 +17017,7 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, if (isinstance) { identifier name; expr_ty bound; + expr_ty default_value; if (PyObject_GetOptionalAttr(obj, state->name, &tmp) < 0) { return -1; @@ -16970,8 +17053,25 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, if (res != 0) goto failed; Py_CLEAR(tmp); } - *out = _PyAST_TypeVar(name, bound, lineno, col_offset, end_lineno, - end_col_offset, arena); + if (PyObject_GetOptionalAttr(obj, state->default_value, &tmp) < 0) { + return -1; + } + if (tmp == NULL || tmp == Py_None) { + Py_CLEAR(tmp); + default_value = NULL; + } + else { + int res; + if (_Py_EnterRecursiveCall(" while traversing 'TypeVar' node")) { + goto failed; + } + res = obj2ast_expr(state, tmp, &default_value, arena); + _Py_LeaveRecursiveCall(); + if (res != 0) goto failed; + Py_CLEAR(tmp); + } + *out = _PyAST_TypeVar(name, bound, default_value, lineno, col_offset, + end_lineno, end_col_offset, arena); if (*out == NULL) goto failed; return 0; } @@ -16982,6 +17082,7 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, } if (isinstance) { identifier name; + expr_ty default_value; if (PyObject_GetOptionalAttr(obj, state->name, &tmp) < 0) { return -1; @@ -17000,8 +17101,25 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, if (res != 0) goto failed; Py_CLEAR(tmp); } - *out = _PyAST_ParamSpec(name, lineno, col_offset, end_lineno, - end_col_offset, arena); + if (PyObject_GetOptionalAttr(obj, state->default_value, &tmp) < 0) { + return -1; + } + if (tmp == NULL || tmp == Py_None) { + Py_CLEAR(tmp); + default_value = NULL; + } + else { + int res; + if (_Py_EnterRecursiveCall(" while traversing 'ParamSpec' node")) { + goto failed; + } + res = obj2ast_expr(state, tmp, &default_value, arena); + _Py_LeaveRecursiveCall(); + if (res != 0) goto failed; + Py_CLEAR(tmp); + } + *out = _PyAST_ParamSpec(name, default_value, lineno, col_offset, + end_lineno, end_col_offset, arena); if (*out == NULL) goto failed; return 0; } @@ -17012,6 +17130,7 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, } if (isinstance) { identifier name; + expr_ty default_value; if (PyObject_GetOptionalAttr(obj, state->name, &tmp) < 0) { return -1; @@ -17030,8 +17149,25 @@ obj2ast_type_param(struct ast_state *state, PyObject* obj, type_param_ty* out, if (res != 0) goto failed; Py_CLEAR(tmp); } - *out = _PyAST_TypeVarTuple(name, lineno, col_offset, end_lineno, - end_col_offset, arena); + if (PyObject_GetOptionalAttr(obj, state->default_value, &tmp) < 0) { + return -1; + } + if (tmp == NULL || tmp == Py_None) { + Py_CLEAR(tmp); + default_value = NULL; + } + else { + int res; + if (_Py_EnterRecursiveCall(" while traversing 'TypeVarTuple' node")) { + goto failed; + } + res = obj2ast_expr(state, tmp, &default_value, arena); + _Py_LeaveRecursiveCall(); + if (res != 0) goto failed; + Py_CLEAR(tmp); + } + *out = _PyAST_TypeVarTuple(name, default_value, lineno, col_offset, + end_lineno, end_col_offset, arena); if (*out == NULL) goto failed; return 0; } diff --git a/Python/ast.c b/Python/ast.c index 71b09d889f..1d1a48ec88 100644 --- a/Python/ast.c +++ b/Python/ast.c @@ -1011,13 +1011,19 @@ validate_typeparam(struct validator *state, type_param_ty tp) case TypeVar_kind: ret = validate_name(tp->v.TypeVar.name) && (!tp->v.TypeVar.bound || - validate_expr(state, tp->v.TypeVar.bound, Load)); + validate_expr(state, tp->v.TypeVar.bound, Load)) && + (!tp->v.TypeVar.default_value || + validate_expr(state, tp->v.TypeVar.default_value, Load)); break; case ParamSpec_kind: - ret = validate_name(tp->v.ParamSpec.name); + ret = validate_name(tp->v.ParamSpec.name) && + (!tp->v.ParamSpec.default_value || + validate_expr(state, tp->v.ParamSpec.default_value, Load)); break; case TypeVarTuple_kind: - ret = validate_name(tp->v.TypeVarTuple.name); + ret = validate_name(tp->v.TypeVarTuple.name) && + (!tp->v.TypeVarTuple.default_value || + validate_expr(state, tp->v.TypeVarTuple.default_value, Load)); break; } return ret; diff --git a/Python/compile.c b/Python/compile.c index feedd98883..ec47af151f 100644 --- a/Python/compile.c +++ b/Python/compile.c @@ -2116,6 +2116,36 @@ wrap_in_stopiteration_handler(struct compiler *c) return SUCCESS; } +static int +compiler_type_param_bound_or_default(struct compiler *c, expr_ty e, + identifier name, void *key, + bool allow_starred) +{ + if (compiler_enter_scope(c, name, COMPILER_SCOPE_TYPEPARAMS, + key, e->lineno) == -1) { + return ERROR; + } + if (allow_starred && e->kind == Starred_kind) { + VISIT(c, expr, e->v.Starred.value); + ADDOP_I(c, LOC(e), UNPACK_SEQUENCE, (Py_ssize_t)1); + } + else { + VISIT(c, expr, e); + } + ADDOP_IN_SCOPE(c, LOC(e), RETURN_VALUE); + PyCodeObject *co = optimize_and_assemble(c, 1); + compiler_exit_scope(c); + if (co == NULL) { + return ERROR; + } + if (compiler_make_closure(c, LOC(e), co, 0) < 0) { + Py_DECREF(co); + return ERROR; + } + Py_DECREF(co); + return SUCCESS; +} + static int compiler_type_params(struct compiler *c, asdl_type_param_seq *type_params) { @@ -2123,6 +2153,7 @@ compiler_type_params(struct compiler *c, asdl_type_param_seq *type_params) return SUCCESS; } Py_ssize_t n = asdl_seq_LEN(type_params); + bool seen_default = false; for (Py_ssize_t i = 0; i < n; i++) { type_param_ty typeparam = asdl_seq_GET(type_params, i); @@ -2132,22 +2163,10 @@ compiler_type_params(struct compiler *c, asdl_type_param_seq *type_params) ADDOP_LOAD_CONST(c, loc, typeparam->v.TypeVar.name); if (typeparam->v.TypeVar.bound) { expr_ty bound = typeparam->v.TypeVar.bound; - if (compiler_enter_scope(c, typeparam->v.TypeVar.name, COMPILER_SCOPE_TYPEPARAMS, - (void *)typeparam, bound->lineno) == -1) { + if (compiler_type_param_bound_or_default(c, bound, typeparam->v.TypeVar.name, + (void *)typeparam, false) < 0) { return ERROR; } - VISIT_IN_SCOPE(c, expr, bound); - ADDOP_IN_SCOPE(c, loc, RETURN_VALUE); - PyCodeObject *co = optimize_and_assemble(c, 1); - compiler_exit_scope(c); - if (co == NULL) { - return ERROR; - } - if (compiler_make_closure(c, loc, co, 0) < 0) { - Py_DECREF(co); - return ERROR; - } - Py_DECREF(co); int intrinsic = bound->kind == Tuple_kind ? INTRINSIC_TYPEVAR_WITH_CONSTRAINTS @@ -2157,18 +2176,60 @@ compiler_type_params(struct compiler *c, asdl_type_param_seq *type_params) else { ADDOP_I(c, loc, CALL_INTRINSIC_1, INTRINSIC_TYPEVAR); } + if (typeparam->v.TypeVar.default_value) { + seen_default = true; + expr_ty default_ = typeparam->v.TypeVar.default_value; + if (compiler_type_param_bound_or_default(c, default_, typeparam->v.TypeVar.name, + (void *)((uintptr_t)typeparam + 1), false) < 0) { + return ERROR; + } + ADDOP_I(c, loc, CALL_INTRINSIC_2, INTRINSIC_SET_TYPEPARAM_DEFAULT); + } + else if (seen_default) { + return compiler_error(c, loc, "non-default type parameter '%U' " + "follows default type parameter", + typeparam->v.TypeVar.name); + } ADDOP_I(c, loc, COPY, 1); RETURN_IF_ERROR(compiler_nameop(c, loc, typeparam->v.TypeVar.name, Store)); break; case TypeVarTuple_kind: ADDOP_LOAD_CONST(c, loc, typeparam->v.TypeVarTuple.name); ADDOP_I(c, loc, CALL_INTRINSIC_1, INTRINSIC_TYPEVARTUPLE); + if (typeparam->v.TypeVarTuple.default_value) { + expr_ty default_ = typeparam->v.TypeVarTuple.default_value; + if (compiler_type_param_bound_or_default(c, default_, typeparam->v.TypeVarTuple.name, + (void *)typeparam, true) < 0) { + return ERROR; + } + ADDOP_I(c, loc, CALL_INTRINSIC_2, INTRINSIC_SET_TYPEPARAM_DEFAULT); + seen_default = true; + } + else if (seen_default) { + return compiler_error(c, loc, "non-default type parameter '%U' " + "follows default type parameter", + typeparam->v.TypeVarTuple.name); + } ADDOP_I(c, loc, COPY, 1); RETURN_IF_ERROR(compiler_nameop(c, loc, typeparam->v.TypeVarTuple.name, Store)); break; case ParamSpec_kind: ADDOP_LOAD_CONST(c, loc, typeparam->v.ParamSpec.name); ADDOP_I(c, loc, CALL_INTRINSIC_1, INTRINSIC_PARAMSPEC); + if (typeparam->v.ParamSpec.default_value) { + expr_ty default_ = typeparam->v.ParamSpec.default_value; + if (compiler_type_param_bound_or_default(c, default_, typeparam->v.ParamSpec.name, + (void *)typeparam, false) < 0) { + return ERROR; + } + ADDOP_I(c, loc, CALL_INTRINSIC_2, INTRINSIC_SET_TYPEPARAM_DEFAULT); + seen_default = true; + } + else if (seen_default) { + return compiler_error(c, loc, "non-default type parameter '%U' " + "follows default type parameter", + typeparam->v.ParamSpec.name); + } ADDOP_I(c, loc, COPY, 1); RETURN_IF_ERROR(compiler_nameop(c, loc, typeparam->v.ParamSpec.name, Store)); break; diff --git a/Python/intrinsics.c b/Python/intrinsics.c index d3146973b7..5b10c3ce7d 100644 --- a/Python/intrinsics.c +++ b/Python/intrinsics.c @@ -265,6 +265,7 @@ _PyIntrinsics_BinaryFunctions[] = { INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_BOUND, make_typevar_with_bound) INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_CONSTRAINTS, make_typevar_with_constraints) INTRINSIC_FUNC_ENTRY(INTRINSIC_SET_FUNCTION_TYPE_PARAMS, _Py_set_function_type_params) + INTRINSIC_FUNC_ENTRY(INTRINSIC_SET_TYPEPARAM_DEFAULT, _Py_set_typeparam_default) }; #undef INTRINSIC_FUNC_ENTRY diff --git a/Python/symtable.c b/Python/symtable.c index eecd159b2c..2ec21a2d37 100644 --- a/Python/symtable.c +++ b/Python/symtable.c @@ -2275,6 +2275,24 @@ symtable_visit_expr(struct symtable *st, expr_ty e) VISIT_QUIT(st, 1); } +static int +symtable_visit_type_param_bound_or_default(struct symtable *st, expr_ty e, identifier name, void *key) +{ + if (e) { + int is_in_class = st->st_cur->ste_can_see_class_scope; + if (!symtable_enter_block(st, name, TypeVarBoundBlock, key, LOCATION(e))) + return 0; + st->st_cur->ste_can_see_class_scope = is_in_class; + if (is_in_class && !symtable_add_def(st, &_Py_ID(__classdict__), USE, LOCATION(e))) { + VISIT_QUIT(st, 0); + } + VISIT(st, expr, e); + if (!symtable_exit_block(st)) + return 0; + } + return 1; +} + static int symtable_visit_type_param(struct symtable *st, type_param_ty tp) { @@ -2287,28 +2305,39 @@ symtable_visit_type_param(struct symtable *st, type_param_ty tp) case TypeVar_kind: if (!symtable_add_def(st, tp->v.TypeVar.name, DEF_TYPE_PARAM | DEF_LOCAL, LOCATION(tp))) VISIT_QUIT(st, 0); - if (tp->v.TypeVar.bound) { - int is_in_class = st->st_cur->ste_can_see_class_scope; - if (!symtable_enter_block(st, tp->v.TypeVar.name, - TypeVarBoundBlock, (void *)tp, - LOCATION(tp))) - VISIT_QUIT(st, 0); - st->st_cur->ste_can_see_class_scope = is_in_class; - if (is_in_class && !symtable_add_def(st, &_Py_ID(__classdict__), USE, LOCATION(tp->v.TypeVar.bound))) { - VISIT_QUIT(st, 0); - } - VISIT(st, expr, tp->v.TypeVar.bound); - if (!symtable_exit_block(st)) - VISIT_QUIT(st, 0); + + // We must use a different key for the bound and default. The obvious choice would be to + // use the .bound and .default_value pointers, but that fails when the expression immediately + // inside the bound or default is a comprehension: we would reuse the same key for + // the comprehension scope. Therefore, use the address + 1 as the second key. + // The only requirement for the key is that it is unique and it matches the logic in + // compile.c where the scope is retrieved. + if (!symtable_visit_type_param_bound_or_default(st, tp->v.TypeVar.bound, tp->v.TypeVar.name, + (void *)tp)) { + VISIT_QUIT(st, 0); + } + if (!symtable_visit_type_param_bound_or_default(st, tp->v.TypeVar.default_value, tp->v.TypeVar.name, + (void *)((uintptr_t)tp + 1))) { + VISIT_QUIT(st, 0); } break; case TypeVarTuple_kind: - if (!symtable_add_def(st, tp->v.TypeVarTuple.name, DEF_TYPE_PARAM | DEF_LOCAL, LOCATION(tp))) + if (!symtable_add_def(st, tp->v.TypeVarTuple.name, DEF_TYPE_PARAM | DEF_LOCAL, LOCATION(tp))) { VISIT_QUIT(st, 0); + } + if (!symtable_visit_type_param_bound_or_default(st, tp->v.TypeVarTuple.default_value, tp->v.TypeVarTuple.name, + (void *)tp)) { + VISIT_QUIT(st, 0); + } break; case ParamSpec_kind: - if (!symtable_add_def(st, tp->v.ParamSpec.name, DEF_TYPE_PARAM | DEF_LOCAL, LOCATION(tp))) + if (!symtable_add_def(st, tp->v.ParamSpec.name, DEF_TYPE_PARAM | DEF_LOCAL, LOCATION(tp))) { VISIT_QUIT(st, 0); + } + if (!symtable_visit_type_param_bound_or_default(st, tp->v.ParamSpec.default_value, tp->v.ParamSpec.name, + (void *)tp)) { + VISIT_QUIT(st, 0); + } break; } VISIT_QUIT(st, 1);