Python/Python-ast.c

/* File automatically generated by Parser/asdl_c.py */

#include "Python.h"
#include "Python-ast.h"

PyTypeObject *mod_type;
static PyObject* ast2obj_mod(void*);
PyTypeObject *Module_type;
char *Module_fields[]={
        "body",
};
PyTypeObject *Interactive_type;
char *Interactive_fields[]={
        "body",
};
PyTypeObject *Expression_type;
char *Expression_fields[]={
        "body",
};
PyTypeObject *Suite_type;
char *Suite_fields[]={
        "body",
};
PyTypeObject *stmt_type;
static PyObject* ast2obj_stmt(void*);
PyTypeObject *FunctionDef_type;
char *FunctionDef_fields[]={
        "name",
        "args",
        "body",
        "decorators",
};
PyTypeObject *ClassDef_type;
char *ClassDef_fields[]={
        "name",
        "bases",
        "body",
};
PyTypeObject *Return_type;
char *Return_fields[]={
        "value",
};
PyTypeObject *Delete_type;
char *Delete_fields[]={
        "targets",
};
PyTypeObject *Assign_type;
char *Assign_fields[]={
        "targets",
        "value",
};
PyTypeObject *AugAssign_type;
char *AugAssign_fields[]={
        "target",
        "op",
        "value",
};
PyTypeObject *Print_type;
char *Print_fields[]={
        "dest",
        "values",
        "nl",
};
PyTypeObject *For_type;
char *For_fields[]={
        "target",
        "iter",
        "body",
        "orelse",
};
PyTypeObject *While_type;
char *While_fields[]={
        "test",
        "body",
        "orelse",
};
PyTypeObject *If_type;
char *If_fields[]={
        "test",
        "body",
        "orelse",
};
PyTypeObject *Raise_type;
char *Raise_fields[]={
        "type",
        "inst",
        "tback",
};
PyTypeObject *TryExcept_type;
char *TryExcept_fields[]={
        "body",
        "handlers",
        "orelse",
};
PyTypeObject *TryFinally_type;
char *TryFinally_fields[]={
        "body",
        "finalbody",
};
PyTypeObject *Assert_type;
char *Assert_fields[]={
        "test",
        "msg",
};
PyTypeObject *Import_type;
char *Import_fields[]={
        "names",
};
PyTypeObject *ImportFrom_type;
char *ImportFrom_fields[]={
        "module",
        "names",
};
PyTypeObject *Exec_type;
char *Exec_fields[]={
        "body",
        "globals",
        "locals",
};
PyTypeObject *Global_type;
char *Global_fields[]={
        "names",
};
PyTypeObject *Expr_type;
char *Expr_fields[]={
        "value",
};
PyTypeObject *Pass_type;
char *Pass_fields[]={
};
PyTypeObject *Break_type;
char *Break_fields[]={
};
PyTypeObject *Continue_type;
char *Continue_fields[]={
};
PyTypeObject *expr_type;
static PyObject* ast2obj_expr(void*);
PyTypeObject *BoolOp_type;
char *BoolOp_fields[]={
        "op",
        "values",
};
PyTypeObject *BinOp_type;
char *BinOp_fields[]={
        "left",
        "op",
        "right",
};
PyTypeObject *UnaryOp_type;
char *UnaryOp_fields[]={
        "op",
        "operand",
};
PyTypeObject *Lambda_type;
char *Lambda_fields[]={
        "args",
        "body",
};
PyTypeObject *Dict_type;
char *Dict_fields[]={
        "keys",
        "values",
};
PyTypeObject *ListComp_type;
char *ListComp_fields[]={
        "elt",
        "generators",
};
PyTypeObject *GeneratorExp_type;
char *GeneratorExp_fields[]={
        "elt",
        "generators",
};
PyTypeObject *Yield_type;
char *Yield_fields[]={
        "value",
};
PyTypeObject *Compare_type;
char *Compare_fields[]={
        "left",
        "ops",
        "comparators",
};
PyTypeObject *Call_type;
char *Call_fields[]={
        "func",
        "args",
        "keywords",
        "starargs",
        "kwargs",
};
PyTypeObject *Repr_type;
char *Repr_fields[]={
        "value",
};
PyTypeObject *Num_type;
char *Num_fields[]={
        "n",
};
PyTypeObject *Str_type;
char *Str_fields[]={
        "s",
};
PyTypeObject *Attribute_type;
char *Attribute_fields[]={
        "value",
        "attr",
        "ctx",
};
PyTypeObject *Subscript_type;
char *Subscript_fields[]={
        "value",
        "slice",
        "ctx",
};
PyTypeObject *Name_type;
char *Name_fields[]={
        "id",
        "ctx",
};
PyTypeObject *List_type;
char *List_fields[]={
        "elts",
        "ctx",
};
PyTypeObject *Tuple_type;
char *Tuple_fields[]={
        "elts",
        "ctx",
};
PyTypeObject *expr_context_type;
static PyObject *Load_singleton, *Store_singleton, *Del_singleton,
*AugLoad_singleton, *AugStore_singleton, *Param_singleton;
static PyObject* ast2obj_expr_context(expr_context_ty);
PyTypeObject *Load_type;
char *Load_fields[]={
};
PyTypeObject *Store_type;
char *Store_fields[]={
};
PyTypeObject *Del_type;
char *Del_fields[]={
};
PyTypeObject *AugLoad_type;
char *AugLoad_fields[]={
};
PyTypeObject *AugStore_type;
char *AugStore_fields[]={
};
PyTypeObject *Param_type;
char *Param_fields[]={
};
PyTypeObject *slice_type;
static PyObject* ast2obj_slice(void*);
PyTypeObject *Ellipsis_type;
char *Ellipsis_fields[]={
};
PyTypeObject *Slice_type;
char *Slice_fields[]={
        "lower",
        "upper",
        "step",
};
PyTypeObject *ExtSlice_type;
char *ExtSlice_fields[]={
        "dims",
};
PyTypeObject *Index_type;
char *Index_fields[]={
        "value",
};
PyTypeObject *boolop_type;
static PyObject *And_singleton, *Or_singleton;
static PyObject* ast2obj_boolop(boolop_ty);
PyTypeObject *And_type;
char *And_fields[]={
};
PyTypeObject *Or_type;
char *Or_fields[]={
};
PyTypeObject *operator_type;
static PyObject *Add_singleton, *Sub_singleton, *Mult_singleton,
*Div_singleton, *Mod_singleton, *Pow_singleton, *LShift_singleton,
*RShift_singleton, *BitOr_singleton, *BitXor_singleton, *BitAnd_singleton,
*FloorDiv_singleton;
static PyObject* ast2obj_operator(operator_ty);
PyTypeObject *Add_type;
char *Add_fields[]={
};
PyTypeObject *Sub_type;
char *Sub_fields[]={
};
PyTypeObject *Mult_type;
char *Mult_fields[]={
};
PyTypeObject *Div_type;
char *Div_fields[]={
};
PyTypeObject *Mod_type;
char *Mod_fields[]={
};
PyTypeObject *Pow_type;
char *Pow_fields[]={
};
PyTypeObject *LShift_type;
char *LShift_fields[]={
};
PyTypeObject *RShift_type;
char *RShift_fields[]={
};
PyTypeObject *BitOr_type;
char *BitOr_fields[]={
};
PyTypeObject *BitXor_type;
char *BitXor_fields[]={
};
PyTypeObject *BitAnd_type;
char *BitAnd_fields[]={
};
PyTypeObject *FloorDiv_type;
char *FloorDiv_fields[]={
};
PyTypeObject *unaryop_type;
static PyObject *Invert_singleton, *Not_singleton, *UAdd_singleton,
*USub_singleton;
static PyObject* ast2obj_unaryop(unaryop_ty);
PyTypeObject *Invert_type;
char *Invert_fields[]={
};
PyTypeObject *Not_type;
char *Not_fields[]={
};
PyTypeObject *UAdd_type;
char *UAdd_fields[]={
};
PyTypeObject *USub_type;
char *USub_fields[]={
};
PyTypeObject *cmpop_type;
static PyObject *Eq_singleton, *NotEq_singleton, *Lt_singleton, *LtE_singleton,
*Gt_singleton, *GtE_singleton, *Is_singleton, *IsNot_singleton, *In_singleton,
*NotIn_singleton;
static PyObject* ast2obj_cmpop(cmpop_ty);
PyTypeObject *Eq_type;
char *Eq_fields[]={
};
PyTypeObject *NotEq_type;
char *NotEq_fields[]={
};
PyTypeObject *Lt_type;
char *Lt_fields[]={
};
PyTypeObject *LtE_type;
char *LtE_fields[]={
};
PyTypeObject *Gt_type;
char *Gt_fields[]={
};
PyTypeObject *GtE_type;
char *GtE_fields[]={
};
PyTypeObject *Is_type;
char *Is_fields[]={
};
PyTypeObject *IsNot_type;
char *IsNot_fields[]={
};
PyTypeObject *In_type;
char *In_fields[]={
};
PyTypeObject *NotIn_type;
char *NotIn_fields[]={
};
PyTypeObject *comprehension_type;
static PyObject* ast2obj_comprehension(void*);
char *comprehension_fields[]={
        "target",
        "iter",
        "ifs",
};
PyTypeObject *excepthandler_type;
static PyObject* ast2obj_excepthandler(void*);
char *excepthandler_fields[]={
        "type",
        "name",
        "body",
};
PyTypeObject *arguments_type;
static PyObject* ast2obj_arguments(void*);
char *arguments_fields[]={
        "args",
        "vararg",
        "kwarg",
        "defaults",
};
PyTypeObject *keyword_type;
static PyObject* ast2obj_keyword(void*);
char *keyword_fields[]={
        "arg",
        "value",
};
PyTypeObject *alias_type;
static PyObject* ast2obj_alias(void*);
char *alias_fields[]={
        "name",
        "asname",
};


static PyTypeObject* make_type(char *type, PyTypeObject* base, char**fields, int num_fields)
{
    PyObject *fnames, *result;
    int i;
    if (num_fields) {
        fnames = PyTuple_New(num_fields);
        if (!fnames) return NULL;
    } else {
        fnames = Py_None;
        Py_INCREF(Py_None);
    }
    for(i=0; i < num_fields; i++) {
        PyObject *field = PyString_FromString(fields[i]);
        if (!field) {
            Py_DECREF(fnames);
            return NULL;
        }
        PyTuple_SET_ITEM(fnames, i, field);
    }
    result = PyObject_CallFunction((PyObject*)&PyType_Type, "s(O){sO}", type, base, "_fields", fnames);
    Py_DECREF(fnames);
    return (PyTypeObject*)result;
}

static PyObject* ast2obj_list(asdl_seq *seq, PyObject* (*func)(void*))
{
    int i, n = asdl_seq_LEN(seq);
    PyObject *result = PyList_New(n);
    PyObject *value;
    if (!result)
        return NULL;
    for (i = 0; i < n; i++) {
        value = func(asdl_seq_GET(seq, i));
        if (!value) {
            Py_DECREF(result);
            return NULL;
        }
        PyList_SET_ITEM(result, i, value);
    }
    return result;
}

static PyObject* ast2obj_object(void *o)
{
    if (!o)
        o = Py_None;
    Py_INCREF((PyObject*)o);
    return (PyObject*)o;
}
#define ast2obj_identifier ast2obj_object
#define ast2obj_string ast2obj_object
static PyObject* ast2obj_bool(bool b)
{
    return PyBool_FromLong(b);
}

static int initialized;
static int init_types(void)
{
        if (initialized) return 1;
        mod_type = make_type("mod", &PyBaseObject_Type, NULL, 0);
        Module_type = make_type("Module", mod_type, Module_fields, 1);
        Interactive_type = make_type("Interactive", mod_type,
                                     Interactive_fields, 1);
        Expression_type = make_type("Expression", mod_type, Expression_fields,
                                    1);
        Suite_type = make_type("Suite", mod_type, Suite_fields, 1);
        stmt_type = make_type("stmt", &PyBaseObject_Type, NULL, 0);
        FunctionDef_type = make_type("FunctionDef", stmt_type,
                                     FunctionDef_fields, 4);
        ClassDef_type = make_type("ClassDef", stmt_type, ClassDef_fields, 3);
        Return_type = make_type("Return", stmt_type, Return_fields, 1);
        Delete_type = make_type("Delete", stmt_type, Delete_fields, 1);
        Assign_type = make_type("Assign", stmt_type, Assign_fields, 2);
        AugAssign_type = make_type("AugAssign", stmt_type, AugAssign_fields, 3);
        Print_type = make_type("Print", stmt_type, Print_fields, 3);
        For_type = make_type("For", stmt_type, For_fields, 4);
        While_type = make_type("While", stmt_type, While_fields, 3);
        If_type = make_type("If", stmt_type, If_fields, 3);
        Raise_type = make_type("Raise", stmt_type, Raise_fields, 3);
        TryExcept_type = make_type("TryExcept", stmt_type, TryExcept_fields, 3);
        TryFinally_type = make_type("TryFinally", stmt_type, TryFinally_fields,
                                    2);
        Assert_type = make_type("Assert", stmt_type, Assert_fields, 2);
        Import_type = make_type("Import", stmt_type, Import_fields, 1);
        ImportFrom_type = make_type("ImportFrom", stmt_type, ImportFrom_fields,
                                    2);
        Exec_type = make_type("Exec", stmt_type, Exec_fields, 3);
        Global_type = make_type("Global", stmt_type, Global_fields, 1);
        Expr_type = make_type("Expr", stmt_type, Expr_fields, 1);
        Pass_type = make_type("Pass", stmt_type, Pass_fields, 0);
        Break_type = make_type("Break", stmt_type, Break_fields, 0);
        Continue_type = make_type("Continue", stmt_type, Continue_fields, 0);
        expr_type = make_type("expr", &PyBaseObject_Type, NULL, 0);
        BoolOp_type = make_type("BoolOp", expr_type, BoolOp_fields, 2);
        BinOp_type = make_type("BinOp", expr_type, BinOp_fields, 3);
        UnaryOp_type = make_type("UnaryOp", expr_type, UnaryOp_fields, 2);
        Lambda_type = make_type("Lambda", expr_type, Lambda_fields, 2);
        Dict_type = make_type("Dict", expr_type, Dict_fields, 2);
        ListComp_type = make_type("ListComp", expr_type, ListComp_fields, 2);
        GeneratorExp_type = make_type("GeneratorExp", expr_type,
                                      GeneratorExp_fields, 2);
        Yield_type = make_type("Yield", expr_type, Yield_fields, 1);
        Compare_type = make_type("Compare", expr_type, Compare_fields, 3);
        Call_type = make_type("Call", expr_type, Call_fields, 5);
        Repr_type = make_type("Repr", expr_type, Repr_fields, 1);
        Num_type = make_type("Num", expr_type, Num_fields, 1);
        Str_type = make_type("Str", expr_type, Str_fields, 1);
        Attribute_type = make_type("Attribute", expr_type, Attribute_fields, 3);
        Subscript_type = make_type("Subscript", expr_type, Subscript_fields, 3);
        Name_type = make_type("Name", expr_type, Name_fields, 2);
        List_type = make_type("List", expr_type, List_fields, 2);
        Tuple_type = make_type("Tuple", expr_type, Tuple_fields, 2);
        expr_context_type = make_type("expr_context", &PyBaseObject_Type, NULL,
                                      0);
        Load_type = make_type("Load", expr_context_type, Load_fields, 0);
        Load_singleton = PyType_GenericNew(Load_type, NULL, NULL);
        Store_type = make_type("Store", expr_context_type, Store_fields, 0);
        Store_singleton = PyType_GenericNew(Store_type, NULL, NULL);
        Del_type = make_type("Del", expr_context_type, Del_fields, 0);
        Del_singleton = PyType_GenericNew(Del_type, NULL, NULL);
        AugLoad_type = make_type("AugLoad", expr_context_type, AugLoad_fields,
                                 0);
        AugLoad_singleton = PyType_GenericNew(AugLoad_type, NULL, NULL);
        AugStore_type = make_type("AugStore", expr_context_type,
                                  AugStore_fields, 0);
        AugStore_singleton = PyType_GenericNew(AugStore_type, NULL, NULL);
        Param_type = make_type("Param", expr_context_type, Param_fields, 0);
        Param_singleton = PyType_GenericNew(Param_type, NULL, NULL);
        slice_type = make_type("slice", &PyBaseObject_Type, NULL, 0);
        Ellipsis_type = make_type("Ellipsis", slice_type, Ellipsis_fields, 0);
        Slice_type = make_type("Slice", slice_type, Slice_fields, 3);
        ExtSlice_type = make_type("ExtSlice", slice_type, ExtSlice_fields, 1);
        Index_type = make_type("Index", slice_type, Index_fields, 1);
        boolop_type = make_type("boolop", &PyBaseObject_Type, NULL, 0);
        And_type = make_type("And", boolop_type, And_fields, 0);
        And_singleton = PyType_GenericNew(And_type, NULL, NULL);
        Or_type = make_type("Or", boolop_type, Or_fields, 0);
        Or_singleton = PyType_GenericNew(Or_type, NULL, NULL);
        operator_type = make_type("operator", &PyBaseObject_Type, NULL, 0);
        Add_type = make_type("Add", operator_type, Add_fields, 0);
        Add_singleton = PyType_GenericNew(Add_type, NULL, NULL);
        Sub_type = make_type("Sub", operator_type, Sub_fields, 0);
        Sub_singleton = PyType_GenericNew(Sub_type, NULL, NULL);
        Mult_type = make_type("Mult", operator_type, Mult_fields, 0);
        Mult_singleton = PyType_GenericNew(Mult_type, NULL, NULL);
        Div_type = make_type("Div", operator_type, Div_fields, 0);
        Div_singleton = PyType_GenericNew(Div_type, NULL, NULL);
        Mod_type = make_type("Mod", operator_type, Mod_fields, 0);
        Mod_singleton = PyType_GenericNew(Mod_type, NULL, NULL);
        Pow_type = make_type("Pow", operator_type, Pow_fields, 0);
        Pow_singleton = PyType_GenericNew(Pow_type, NULL, NULL);
        LShift_type = make_type("LShift", operator_type, LShift_fields, 0);
        LShift_singleton = PyType_GenericNew(LShift_type, NULL, NULL);
        RShift_type = make_type("RShift", operator_type, RShift_fields, 0);
        RShift_singleton = PyType_GenericNew(RShift_type, NULL, NULL);
        BitOr_type = make_type("BitOr", operator_type, BitOr_fields, 0);
        BitOr_singleton = PyType_GenericNew(BitOr_type, NULL, NULL);
        BitXor_type = make_type("BitXor", operator_type, BitXor_fields, 0);
        BitXor_singleton = PyType_GenericNew(BitXor_type, NULL, NULL);
        BitAnd_type = make_type("BitAnd", operator_type, BitAnd_fields, 0);
        BitAnd_singleton = PyType_GenericNew(BitAnd_type, NULL, NULL);
        FloorDiv_type = make_type("FloorDiv", operator_type, FloorDiv_fields,
                                  0);
        FloorDiv_singleton = PyType_GenericNew(FloorDiv_type, NULL, NULL);
        unaryop_type = make_type("unaryop", &PyBaseObject_Type, NULL, 0);
        Invert_type = make_type("Invert", unaryop_type, Invert_fields, 0);
        Invert_singleton = PyType_GenericNew(Invert_type, NULL, NULL);
        Not_type = make_type("Not", unaryop_type, Not_fields, 0);
        Not_singleton = PyType_GenericNew(Not_type, NULL, NULL);
        UAdd_type = make_type("UAdd", unaryop_type, UAdd_fields, 0);
        UAdd_singleton = PyType_GenericNew(UAdd_type, NULL, NULL);
        USub_type = make_type("USub", unaryop_type, USub_fields, 0);
        USub_singleton = PyType_GenericNew(USub_type, NULL, NULL);
        cmpop_type = make_type("cmpop", &PyBaseObject_Type, NULL, 0);
        Eq_type = make_type("Eq", cmpop_type, Eq_fields, 0);
        Eq_singleton = PyType_GenericNew(Eq_type, NULL, NULL);
        NotEq_type = make_type("NotEq", cmpop_type, NotEq_fields, 0);
        NotEq_singleton = PyType_GenericNew(NotEq_type, NULL, NULL);
        Lt_type = make_type("Lt", cmpop_type, Lt_fields, 0);
        Lt_singleton = PyType_GenericNew(Lt_type, NULL, NULL);
        LtE_type = make_type("LtE", cmpop_type, LtE_fields, 0);
        LtE_singleton = PyType_GenericNew(LtE_type, NULL, NULL);
        Gt_type = make_type("Gt", cmpop_type, Gt_fields, 0);
        Gt_singleton = PyType_GenericNew(Gt_type, NULL, NULL);
        GtE_type = make_type("GtE", cmpop_type, GtE_fields, 0);
        GtE_singleton = PyType_GenericNew(GtE_type, NULL, NULL);
        Is_type = make_type("Is", cmpop_type, Is_fields, 0);
        Is_singleton = PyType_GenericNew(Is_type, NULL, NULL);
        IsNot_type = make_type("IsNot", cmpop_type, IsNot_fields, 0);
        IsNot_singleton = PyType_GenericNew(IsNot_type, NULL, NULL);
        In_type = make_type("In", cmpop_type, In_fields, 0);
        In_singleton = PyType_GenericNew(In_type, NULL, NULL);
        NotIn_type = make_type("NotIn", cmpop_type, NotIn_fields, 0);
        NotIn_singleton = PyType_GenericNew(NotIn_type, NULL, NULL);
        comprehension_type = make_type("comprehension", &PyBaseObject_Type,
                                       comprehension_fields, 3);
        excepthandler_type = make_type("excepthandler", &PyBaseObject_Type,
                                       excepthandler_fields, 3);
        arguments_type = make_type("arguments", &PyBaseObject_Type,
                                   arguments_fields, 4);
        keyword_type = make_type("keyword", &PyBaseObject_Type, keyword_fields,
                                 2);
        alias_type = make_type("alias", &PyBaseObject_Type, alias_fields, 2);
return 1;
}

mod_ty
Module(asdl_seq * body, PyArena *arena)
{
        mod_ty p;
        p = (mod_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Module_kind;
        p->v.Module.body = body;
        return p;
}

mod_ty
Interactive(asdl_seq * body, PyArena *arena)
{
        mod_ty p;
        p = (mod_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Interactive_kind;
        p->v.Interactive.body = body;
        return p;
}

mod_ty
Expression(expr_ty body, PyArena *arena)
{
        mod_ty p;
        if (!body) {
                PyErr_SetString(PyExc_ValueError,
                                "field body is required for Expression");
                return NULL;
        }
        p = (mod_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Expression_kind;
        p->v.Expression.body = body;
        return p;
}

mod_ty
Suite(asdl_seq * body, PyArena *arena)
{
        mod_ty p;
        p = (mod_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Suite_kind;
        p->v.Suite.body = body;
        return p;
}

stmt_ty
FunctionDef(identifier name, arguments_ty args, asdl_seq * body, asdl_seq *
            decorators, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!name) {
                PyErr_SetString(PyExc_ValueError,
                                "field name is required for FunctionDef");
                return NULL;
        }
        if (!args) {
                PyErr_SetString(PyExc_ValueError,
                                "field args is required for FunctionDef");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = FunctionDef_kind;
        p->v.FunctionDef.name = name;
        p->v.FunctionDef.args = args;
        p->v.FunctionDef.body = body;
        p->v.FunctionDef.decorators = decorators;
        p->lineno = lineno;
        return p;
}

stmt_ty
ClassDef(identifier name, asdl_seq * bases, asdl_seq * body, int lineno,
         PyArena *arena)
{
        stmt_ty p;
        if (!name) {
                PyErr_SetString(PyExc_ValueError,
                                "field name is required for ClassDef");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = ClassDef_kind;
        p->v.ClassDef.name = name;
        p->v.ClassDef.bases = bases;
        p->v.ClassDef.body = body;
        p->lineno = lineno;
        return p;
}

stmt_ty
Return(expr_ty value, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Return_kind;
        p->v.Return.value = value;
        p->lineno = lineno;
        return p;
}

stmt_ty
Delete(asdl_seq * targets, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Delete_kind;
        p->v.Delete.targets = targets;
        p->lineno = lineno;
        return p;
}

stmt_ty
Assign(asdl_seq * targets, expr_ty value, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Assign");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Assign_kind;
        p->v.Assign.targets = targets;
        p->v.Assign.value = value;
        p->lineno = lineno;
        return p;
}

stmt_ty
AugAssign(expr_ty target, operator_ty op, expr_ty value, int lineno, PyArena
          *arena)
{
        stmt_ty p;
        if (!target) {
                PyErr_SetString(PyExc_ValueError,
                                "field target is required for AugAssign");
                return NULL;
        }
        if (!op) {
                PyErr_SetString(PyExc_ValueError,
                                "field op is required for AugAssign");
                return NULL;
        }
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for AugAssign");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = AugAssign_kind;
        p->v.AugAssign.target = target;
        p->v.AugAssign.op = op;
        p->v.AugAssign.value = value;
        p->lineno = lineno;
        return p;
}

stmt_ty
Print(expr_ty dest, asdl_seq * values, bool nl, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Print_kind;
        p->v.Print.dest = dest;
        p->v.Print.values = values;
        p->v.Print.nl = nl;
        p->lineno = lineno;
        return p;
}

stmt_ty
For(expr_ty target, expr_ty iter, asdl_seq * body, asdl_seq * orelse, int
    lineno, PyArena *arena)
{
        stmt_ty p;
        if (!target) {
                PyErr_SetString(PyExc_ValueError,
                                "field target is required for For");
                return NULL;
        }
        if (!iter) {
                PyErr_SetString(PyExc_ValueError,
                                "field iter is required for For");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = For_kind;
        p->v.For.target = target;
        p->v.For.iter = iter;
        p->v.For.body = body;
        p->v.For.orelse = orelse;
        p->lineno = lineno;
        return p;
}

stmt_ty
While(expr_ty test, asdl_seq * body, asdl_seq * orelse, int lineno, PyArena
      *arena)
{
        stmt_ty p;
        if (!test) {
                PyErr_SetString(PyExc_ValueError,
                                "field test is required for While");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = While_kind;
        p->v.While.test = test;
        p->v.While.body = body;
        p->v.While.orelse = orelse;
        p->lineno = lineno;
        return p;
}

stmt_ty
If(expr_ty test, asdl_seq * body, asdl_seq * orelse, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!test) {
                PyErr_SetString(PyExc_ValueError,
                                "field test is required for If");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = If_kind;
        p->v.If.test = test;
        p->v.If.body = body;
        p->v.If.orelse = orelse;
        p->lineno = lineno;
        return p;
}

stmt_ty
Raise(expr_ty type, expr_ty inst, expr_ty tback, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Raise_kind;
        p->v.Raise.type = type;
        p->v.Raise.inst = inst;
        p->v.Raise.tback = tback;
        p->lineno = lineno;
        return p;
}

stmt_ty
TryExcept(asdl_seq * body, asdl_seq * handlers, asdl_seq * orelse, int lineno,
          PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = TryExcept_kind;
        p->v.TryExcept.body = body;
        p->v.TryExcept.handlers = handlers;
        p->v.TryExcept.orelse = orelse;
        p->lineno = lineno;
        return p;
}

stmt_ty
TryFinally(asdl_seq * body, asdl_seq * finalbody, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = TryFinally_kind;
        p->v.TryFinally.body = body;
        p->v.TryFinally.finalbody = finalbody;
        p->lineno = lineno;
        return p;
}

stmt_ty
Assert(expr_ty test, expr_ty msg, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!test) {
                PyErr_SetString(PyExc_ValueError,
                                "field test is required for Assert");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Assert_kind;
        p->v.Assert.test = test;
        p->v.Assert.msg = msg;
        p->lineno = lineno;
        return p;
}

stmt_ty
Import(asdl_seq * names, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Import_kind;
        p->v.Import.names = names;
        p->lineno = lineno;
        return p;
}

stmt_ty
ImportFrom(identifier module, asdl_seq * names, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!module) {
                PyErr_SetString(PyExc_ValueError,
                                "field module is required for ImportFrom");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = ImportFrom_kind;
        p->v.ImportFrom.module = module;
        p->v.ImportFrom.names = names;
        p->lineno = lineno;
        return p;
}

stmt_ty
Exec(expr_ty body, expr_ty globals, expr_ty locals, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!body) {
                PyErr_SetString(PyExc_ValueError,
                                "field body is required for Exec");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Exec_kind;
        p->v.Exec.body = body;
        p->v.Exec.globals = globals;
        p->v.Exec.locals = locals;
        p->lineno = lineno;
        return p;
}

stmt_ty
Global(asdl_seq * names, int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Global_kind;
        p->v.Global.names = names;
        p->lineno = lineno;
        return p;
}

stmt_ty
Expr(expr_ty value, int lineno, PyArena *arena)
{
        stmt_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Expr");
                return NULL;
        }
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Expr_kind;
        p->v.Expr.value = value;
        p->lineno = lineno;
        return p;
}

stmt_ty
Pass(int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Pass_kind;
        p->lineno = lineno;
        return p;
}

stmt_ty
Break(int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Break_kind;
        p->lineno = lineno;
        return p;
}

stmt_ty
Continue(int lineno, PyArena *arena)
{
        stmt_ty p;
        p = (stmt_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Continue_kind;
        p->lineno = lineno;
        return p;
}

expr_ty
BoolOp(boolop_ty op, asdl_seq * values, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!op) {
                PyErr_SetString(PyExc_ValueError,
                                "field op is required for BoolOp");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = BoolOp_kind;
        p->v.BoolOp.op = op;
        p->v.BoolOp.values = values;
        p->lineno = lineno;
        return p;
}

expr_ty
BinOp(expr_ty left, operator_ty op, expr_ty right, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!left) {
                PyErr_SetString(PyExc_ValueError,
                                "field left is required for BinOp");
                return NULL;
        }
        if (!op) {
                PyErr_SetString(PyExc_ValueError,
                                "field op is required for BinOp");
                return NULL;
        }
        if (!right) {
                PyErr_SetString(PyExc_ValueError,
                                "field right is required for BinOp");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = BinOp_kind;
        p->v.BinOp.left = left;
        p->v.BinOp.op = op;
        p->v.BinOp.right = right;
        p->lineno = lineno;
        return p;
}

expr_ty
UnaryOp(unaryop_ty op, expr_ty operand, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!op) {
                PyErr_SetString(PyExc_ValueError,
                                "field op is required for UnaryOp");
                return NULL;
        }
        if (!operand) {
                PyErr_SetString(PyExc_ValueError,
                                "field operand is required for UnaryOp");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = UnaryOp_kind;
        p->v.UnaryOp.op = op;
        p->v.UnaryOp.operand = operand;
        p->lineno = lineno;
        return p;
}

expr_ty
Lambda(arguments_ty args, expr_ty body, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!args) {
                PyErr_SetString(PyExc_ValueError,
                                "field args is required for Lambda");
                return NULL;
        }
        if (!body) {
                PyErr_SetString(PyExc_ValueError,
                                "field body is required for Lambda");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Lambda_kind;
        p->v.Lambda.args = args;
        p->v.Lambda.body = body;
        p->lineno = lineno;
        return p;
}

expr_ty
Dict(asdl_seq * keys, asdl_seq * values, int lineno, PyArena *arena)
{
        expr_ty p;
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Dict_kind;
        p->v.Dict.keys = keys;
        p->v.Dict.values = values;
        p->lineno = lineno;
        return p;
}

expr_ty
ListComp(expr_ty elt, asdl_seq * generators, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!elt) {
                PyErr_SetString(PyExc_ValueError,
                                "field elt is required for ListComp");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = ListComp_kind;
        p->v.ListComp.elt = elt;
        p->v.ListComp.generators = generators;
        p->lineno = lineno;
        return p;
}

expr_ty
GeneratorExp(expr_ty elt, asdl_seq * generators, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!elt) {
                PyErr_SetString(PyExc_ValueError,
                                "field elt is required for GeneratorExp");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = GeneratorExp_kind;
        p->v.GeneratorExp.elt = elt;
        p->v.GeneratorExp.generators = generators;
        p->lineno = lineno;
        return p;
}

expr_ty
Yield(expr_ty value, int lineno, PyArena *arena)
{
        expr_ty p;
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Yield_kind;
        p->v.Yield.value = value;
        p->lineno = lineno;
        return p;
}

expr_ty
Compare(expr_ty left, asdl_seq * ops, asdl_seq * comparators, int lineno,
        PyArena *arena)
{
        expr_ty p;
        if (!left) {
                PyErr_SetString(PyExc_ValueError,
                                "field left is required for Compare");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Compare_kind;
        p->v.Compare.left = left;
        p->v.Compare.ops = ops;
        p->v.Compare.comparators = comparators;
        p->lineno = lineno;
        return p;
}

expr_ty
Call(expr_ty func, asdl_seq * args, asdl_seq * keywords, expr_ty starargs,
     expr_ty kwargs, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!func) {
                PyErr_SetString(PyExc_ValueError,
                                "field func is required for Call");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Call_kind;
        p->v.Call.func = func;
        p->v.Call.args = args;
        p->v.Call.keywords = keywords;
        p->v.Call.starargs = starargs;
        p->v.Call.kwargs = kwargs;
        p->lineno = lineno;
        return p;
}

expr_ty
Repr(expr_ty value, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Repr");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Repr_kind;
        p->v.Repr.value = value;
        p->lineno = lineno;
        return p;
}

expr_ty
Num(object n, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!n) {
                PyErr_SetString(PyExc_ValueError,
                                "field n is required for Num");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Num_kind;
        p->v.Num.n = n;
        p->lineno = lineno;
        return p;
}

expr_ty
Str(string s, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!s) {
                PyErr_SetString(PyExc_ValueError,
                                "field s is required for Str");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Str_kind;
        p->v.Str.s = s;
        p->lineno = lineno;
        return p;
}

expr_ty
Attribute(expr_ty value, identifier attr, expr_context_ty ctx, int lineno,
          PyArena *arena)
{
        expr_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Attribute");
                return NULL;
        }
        if (!attr) {
                PyErr_SetString(PyExc_ValueError,
                                "field attr is required for Attribute");
                return NULL;
        }
        if (!ctx) {
                PyErr_SetString(PyExc_ValueError,
                                "field ctx is required for Attribute");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Attribute_kind;
        p->v.Attribute.value = value;
        p->v.Attribute.attr = attr;
        p->v.Attribute.ctx = ctx;
        p->lineno = lineno;
        return p;
}

expr_ty
Subscript(expr_ty value, slice_ty slice, expr_context_ty ctx, int lineno,
          PyArena *arena)
{
        expr_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Subscript");
                return NULL;
        }
        if (!slice) {
                PyErr_SetString(PyExc_ValueError,
                                "field slice is required for Subscript");
                return NULL;
        }
        if (!ctx) {
                PyErr_SetString(PyExc_ValueError,
                                "field ctx is required for Subscript");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Subscript_kind;
        p->v.Subscript.value = value;
        p->v.Subscript.slice = slice;
        p->v.Subscript.ctx = ctx;
        p->lineno = lineno;
        return p;
}

expr_ty
Name(identifier id, expr_context_ty ctx, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!id) {
                PyErr_SetString(PyExc_ValueError,
                                "field id is required for Name");
                return NULL;
        }
        if (!ctx) {
                PyErr_SetString(PyExc_ValueError,
                                "field ctx is required for Name");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Name_kind;
        p->v.Name.id = id;
        p->v.Name.ctx = ctx;
        p->lineno = lineno;
        return p;
}

expr_ty
List(asdl_seq * elts, expr_context_ty ctx, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!ctx) {
                PyErr_SetString(PyExc_ValueError,
                                "field ctx is required for List");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = List_kind;
        p->v.List.elts = elts;
        p->v.List.ctx = ctx;
        p->lineno = lineno;
        return p;
}

expr_ty
Tuple(asdl_seq * elts, expr_context_ty ctx, int lineno, PyArena *arena)
{
        expr_ty p;
        if (!ctx) {
                PyErr_SetString(PyExc_ValueError,
                                "field ctx is required for Tuple");
                return NULL;
        }
        p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Tuple_kind;
        p->v.Tuple.elts = elts;
        p->v.Tuple.ctx = ctx;
        p->lineno = lineno;
        return p;
}

slice_ty
Ellipsis(PyArena *arena)
{
        slice_ty p;
        p = (slice_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Ellipsis_kind;
        return p;
}

slice_ty
Slice(expr_ty lower, expr_ty upper, expr_ty step, PyArena *arena)
{
        slice_ty p;
        p = (slice_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Slice_kind;
        p->v.Slice.lower = lower;
        p->v.Slice.upper = upper;
        p->v.Slice.step = step;
        return p;
}

slice_ty
ExtSlice(asdl_seq * dims, PyArena *arena)
{
        slice_ty p;
        p = (slice_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = ExtSlice_kind;
        p->v.ExtSlice.dims = dims;
        return p;
}

slice_ty
Index(expr_ty value, PyArena *arena)
{
        slice_ty p;
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for Index");
                return NULL;
        }
        p = (slice_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->kind = Index_kind;
        p->v.Index.value = value;
        return p;
}

comprehension_ty
comprehension(expr_ty target, expr_ty iter, asdl_seq * ifs, PyArena *arena)
{
        comprehension_ty p;
        if (!target) {
                PyErr_SetString(PyExc_ValueError,
                                "field target is required for comprehension");
                return NULL;
        }
        if (!iter) {
                PyErr_SetString(PyExc_ValueError,
                                "field iter is required for comprehension");
                return NULL;
        }
        p = (comprehension_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->target = target;
        p->iter = iter;
        p->ifs = ifs;
        return p;
}

excepthandler_ty
excepthandler(expr_ty type, expr_ty name, asdl_seq * body, PyArena *arena)
{
        excepthandler_ty p;
        p = (excepthandler_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->type = type;
        p->name = name;
        p->body = body;
        return p;
}

arguments_ty
arguments(asdl_seq * args, identifier vararg, identifier kwarg, asdl_seq *
          defaults, PyArena *arena)
{
        arguments_ty p;
        p = (arguments_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->args = args;
        p->vararg = vararg;
        p->kwarg = kwarg;
        p->defaults = defaults;
        return p;
}

keyword_ty
keyword(identifier arg, expr_ty value, PyArena *arena)
{
        keyword_ty p;
        if (!arg) {
                PyErr_SetString(PyExc_ValueError,
                                "field arg is required for keyword");
                return NULL;
        }
        if (!value) {
                PyErr_SetString(PyExc_ValueError,
                                "field value is required for keyword");
                return NULL;
        }
        p = (keyword_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->arg = arg;
        p->value = value;
        return p;
}

alias_ty
alias(identifier name, identifier asname, PyArena *arena)
{
        alias_ty p;
        if (!name) {
                PyErr_SetString(PyExc_ValueError,
                                "field name is required for alias");
                return NULL;
        }
        p = (alias_ty)PyArena_Malloc(arena, sizeof(*p));
        if (!p) {
                PyErr_NoMemory();
                return NULL;
        }
        p->name = name;
        p->asname = asname;
        return p;
}


PyObject*
ast2obj_mod(void* _o)
{
        mod_ty o = (mod_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        switch (o->kind) {
        case Module_kind:
                result = PyType_GenericNew(Module_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Module.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Interactive_kind:
                result = PyType_GenericNew(Interactive_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Interactive.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Expression_kind:
                result = PyType_GenericNew(Expression_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Expression.body);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Suite_kind:
                result = PyType_GenericNew(Suite_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Suite.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        }

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_stmt(void* _o)
{
        stmt_ty o = (stmt_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        switch (o->kind) {
        case FunctionDef_kind:
                result = PyType_GenericNew(FunctionDef_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_identifier(o->v.FunctionDef.name);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "name", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_arguments(o->v.FunctionDef.args);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "args", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.FunctionDef.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.FunctionDef.decorators, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "decorators", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case ClassDef_kind:
                result = PyType_GenericNew(ClassDef_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_identifier(o->v.ClassDef.name);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "name", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.ClassDef.bases, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "bases", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.ClassDef.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Return_kind:
                result = PyType_GenericNew(Return_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Return.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Delete_kind:
                result = PyType_GenericNew(Delete_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Delete.targets, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "targets", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Assign_kind:
                result = PyType_GenericNew(Assign_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Assign.targets, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "targets", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Assign.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case AugAssign_kind:
                result = PyType_GenericNew(AugAssign_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.AugAssign.target);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "target", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_operator(o->v.AugAssign.op);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "op", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.AugAssign.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Print_kind:
                result = PyType_GenericNew(Print_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Print.dest);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "dest", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Print.values, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "values", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_bool(o->v.Print.nl);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "nl", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case For_kind:
                result = PyType_GenericNew(For_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.For.target);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "target", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.For.iter);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "iter", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.For.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.For.orelse, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "orelse", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case While_kind:
                result = PyType_GenericNew(While_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.While.test);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "test", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.While.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.While.orelse, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "orelse", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case If_kind:
                result = PyType_GenericNew(If_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.If.test);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "test", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.If.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.If.orelse, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "orelse", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Raise_kind:
                result = PyType_GenericNew(Raise_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Raise.type);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "type", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Raise.inst);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "inst", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Raise.tback);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "tback", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case TryExcept_kind:
                result = PyType_GenericNew(TryExcept_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.TryExcept.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.TryExcept.handlers,
                                     ast2obj_excepthandler);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "handlers", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.TryExcept.orelse, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "orelse", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case TryFinally_kind:
                result = PyType_GenericNew(TryFinally_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.TryFinally.body, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.TryFinally.finalbody, ast2obj_stmt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "finalbody", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Assert_kind:
                result = PyType_GenericNew(Assert_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Assert.test);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "test", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Assert.msg);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "msg", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Import_kind:
                result = PyType_GenericNew(Import_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Import.names, ast2obj_alias);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "names", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case ImportFrom_kind:
                result = PyType_GenericNew(ImportFrom_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_identifier(o->v.ImportFrom.module);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "module", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.ImportFrom.names, ast2obj_alias);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "names", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Exec_kind:
                result = PyType_GenericNew(Exec_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Exec.body);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Exec.globals);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "globals", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Exec.locals);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "locals", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Global_kind:
                result = PyType_GenericNew(Global_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Global.names, ast2obj_identifier);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "names", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Expr_kind:
                result = PyType_GenericNew(Expr_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Expr.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Pass_kind:
                result = PyType_GenericNew(Pass_type, NULL, NULL);
                if (!result) goto failed;
                break;
        case Break_kind:
                result = PyType_GenericNew(Break_type, NULL, NULL);
                if (!result) goto failed;
                break;
        case Continue_kind:
                result = PyType_GenericNew(Continue_type, NULL, NULL);
                if (!result) goto failed;
                break;
        }

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_expr(void* _o)
{
        expr_ty o = (expr_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        switch (o->kind) {
        case BoolOp_kind:
                result = PyType_GenericNew(BoolOp_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_boolop(o->v.BoolOp.op);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "op", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.BoolOp.values, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "values", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case BinOp_kind:
                result = PyType_GenericNew(BinOp_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.BinOp.left);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "left", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_operator(o->v.BinOp.op);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "op", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.BinOp.right);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "right", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case UnaryOp_kind:
                result = PyType_GenericNew(UnaryOp_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_unaryop(o->v.UnaryOp.op);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "op", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.UnaryOp.operand);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "operand", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Lambda_kind:
                result = PyType_GenericNew(Lambda_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_arguments(o->v.Lambda.args);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "args", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Lambda.body);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "body", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Dict_kind:
                result = PyType_GenericNew(Dict_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Dict.keys, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "keys", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Dict.values, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "values", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case ListComp_kind:
                result = PyType_GenericNew(ListComp_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.ListComp.elt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "elt", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.ListComp.generators,
                                     ast2obj_comprehension);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "generators", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case GeneratorExp_kind:
                result = PyType_GenericNew(GeneratorExp_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.GeneratorExp.elt);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "elt", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.GeneratorExp.generators,
                                     ast2obj_comprehension);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "generators", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Yield_kind:
                result = PyType_GenericNew(Yield_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Yield.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Compare_kind:
                result = PyType_GenericNew(Compare_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Compare.left);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "left", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Compare.ops,
                                     (PyObject*(*)(void*))ast2obj_cmpop);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ops", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Compare.comparators, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "comparators", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Call_kind:
                result = PyType_GenericNew(Call_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Call.func);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "func", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Call.args, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "args", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_list(o->v.Call.keywords, ast2obj_keyword);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "keywords", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Call.starargs);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "starargs", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Call.kwargs);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "kwargs", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Repr_kind:
                result = PyType_GenericNew(Repr_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Repr.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Num_kind:
                result = PyType_GenericNew(Num_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_object(o->v.Num.n);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "n", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Str_kind:
                result = PyType_GenericNew(Str_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_string(o->v.Str.s);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "s", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Attribute_kind:
                result = PyType_GenericNew(Attribute_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Attribute.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_identifier(o->v.Attribute.attr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "attr", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr_context(o->v.Attribute.ctx);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ctx", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Subscript_kind:
                result = PyType_GenericNew(Subscript_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Subscript.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_slice(o->v.Subscript.slice);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "slice", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr_context(o->v.Subscript.ctx);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ctx", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Name_kind:
                result = PyType_GenericNew(Name_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_identifier(o->v.Name.id);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "id", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr_context(o->v.Name.ctx);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ctx", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case List_kind:
                result = PyType_GenericNew(List_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.List.elts, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "elts", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr_context(o->v.List.ctx);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ctx", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Tuple_kind:
                result = PyType_GenericNew(Tuple_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.Tuple.elts, ast2obj_expr);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "elts", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr_context(o->v.Tuple.ctx);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "ctx", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        }

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject* ast2obj_expr_context(expr_context_ty o)
{
        switch(o) {
                case Load:
                        Py_INCREF(Load_singleton);
                        return Load_singleton;
                case Store:
                        Py_INCREF(Store_singleton);
                        return Store_singleton;
                case Del:
                        Py_INCREF(Del_singleton);
                        return Del_singleton;
                case AugLoad:
                        Py_INCREF(AugLoad_singleton);
                        return AugLoad_singleton;
                case AugStore:
                        Py_INCREF(AugStore_singleton);
                        return AugStore_singleton;
                case Param:
                        Py_INCREF(Param_singleton);
                        return Param_singleton;
        }
        return NULL; /* cannot happen */
}
PyObject*
ast2obj_slice(void* _o)
{
        slice_ty o = (slice_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        switch (o->kind) {
        case Ellipsis_kind:
                result = PyType_GenericNew(Ellipsis_type, NULL, NULL);
                if (!result) goto failed;
                break;
        case Slice_kind:
                result = PyType_GenericNew(Slice_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Slice.lower);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "lower", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Slice.upper);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "upper", value) == -1)
                        goto failed;
                Py_DECREF(value);
                value = ast2obj_expr(o->v.Slice.step);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "step", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case ExtSlice_kind:
                result = PyType_GenericNew(ExtSlice_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_list(o->v.ExtSlice.dims, ast2obj_slice);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "dims", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        case Index_kind:
                result = PyType_GenericNew(Index_type, NULL, NULL);
                if (!result) goto failed;
                value = ast2obj_expr(o->v.Index.value);
                if (!value) goto failed;
                if (PyObject_SetAttrString(result, "value", value) == -1)
                        goto failed;
                Py_DECREF(value);
                break;
        }

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject* ast2obj_boolop(boolop_ty o)
{
        switch(o) {
                case And:
                        Py_INCREF(And_singleton);
                        return And_singleton;
                case Or:
                        Py_INCREF(Or_singleton);
                        return Or_singleton;
        }
        return NULL; /* cannot happen */
}
PyObject* ast2obj_operator(operator_ty o)
{
        switch(o) {
                case Add:
                        Py_INCREF(Add_singleton);
                        return Add_singleton;
                case Sub:
                        Py_INCREF(Sub_singleton);
                        return Sub_singleton;
                case Mult:
                        Py_INCREF(Mult_singleton);
                        return Mult_singleton;
                case Div:
                        Py_INCREF(Div_singleton);
                        return Div_singleton;
                case Mod:
                        Py_INCREF(Mod_singleton);
                        return Mod_singleton;
                case Pow:
                        Py_INCREF(Pow_singleton);
                        return Pow_singleton;
                case LShift:
                        Py_INCREF(LShift_singleton);
                        return LShift_singleton;
                case RShift:
                        Py_INCREF(RShift_singleton);
                        return RShift_singleton;
                case BitOr:
                        Py_INCREF(BitOr_singleton);
                        return BitOr_singleton;
                case BitXor:
                        Py_INCREF(BitXor_singleton);
                        return BitXor_singleton;
                case BitAnd:
                        Py_INCREF(BitAnd_singleton);
                        return BitAnd_singleton;
                case FloorDiv:
                        Py_INCREF(FloorDiv_singleton);
                        return FloorDiv_singleton;
        }
        return NULL; /* cannot happen */
}
PyObject* ast2obj_unaryop(unaryop_ty o)
{
        switch(o) {
                case Invert:
                        Py_INCREF(Invert_singleton);
                        return Invert_singleton;
                case Not:
                        Py_INCREF(Not_singleton);
                        return Not_singleton;
                case UAdd:
                        Py_INCREF(UAdd_singleton);
                        return UAdd_singleton;
                case USub:
                        Py_INCREF(USub_singleton);
                        return USub_singleton;
        }
        return NULL; /* cannot happen */
}
PyObject* ast2obj_cmpop(cmpop_ty o)
{
        switch(o) {
                case Eq:
                        Py_INCREF(Eq_singleton);
                        return Eq_singleton;
                case NotEq:
                        Py_INCREF(NotEq_singleton);
                        return NotEq_singleton;
                case Lt:
                        Py_INCREF(Lt_singleton);
                        return Lt_singleton;
                case LtE:
                        Py_INCREF(LtE_singleton);
                        return LtE_singleton;
                case Gt:
                        Py_INCREF(Gt_singleton);
                        return Gt_singleton;
                case GtE:
                        Py_INCREF(GtE_singleton);
                        return GtE_singleton;
                case Is:
                        Py_INCREF(Is_singleton);
                        return Is_singleton;
                case IsNot:
                        Py_INCREF(IsNot_singleton);
                        return IsNot_singleton;
                case In:
                        Py_INCREF(In_singleton);
                        return In_singleton;
                case NotIn:
                        Py_INCREF(NotIn_singleton);
                        return NotIn_singleton;
        }
        return NULL; /* cannot happen */
}
PyObject*
ast2obj_comprehension(void* _o)
{
        comprehension_ty o = (comprehension_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        result = PyType_GenericNew(comprehension_type, NULL, NULL);
        if (!result) return NULL;
        value = ast2obj_expr(o->target);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "target", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_expr(o->iter);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "iter", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_list(o->ifs, ast2obj_expr);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "ifs", value) == -1)
                goto failed;
        Py_DECREF(value);

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_excepthandler(void* _o)
{
        excepthandler_ty o = (excepthandler_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        result = PyType_GenericNew(excepthandler_type, NULL, NULL);
        if (!result) return NULL;
        value = ast2obj_expr(o->type);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "type", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_expr(o->name);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "name", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_list(o->body, ast2obj_stmt);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "body", value) == -1)
                goto failed;
        Py_DECREF(value);

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_arguments(void* _o)
{
        arguments_ty o = (arguments_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        result = PyType_GenericNew(arguments_type, NULL, NULL);
        if (!result) return NULL;
        value = ast2obj_list(o->args, ast2obj_expr);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "args", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_identifier(o->vararg);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "vararg", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_identifier(o->kwarg);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "kwarg", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_list(o->defaults, ast2obj_expr);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "defaults", value) == -1)
                goto failed;
        Py_DECREF(value);

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_keyword(void* _o)
{
        keyword_ty o = (keyword_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        result = PyType_GenericNew(keyword_type, NULL, NULL);
        if (!result) return NULL;
        value = ast2obj_identifier(o->arg);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "arg", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_expr(o->value);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "value", value) == -1)
                goto failed;
        Py_DECREF(value);

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}

PyObject*
ast2obj_alias(void* _o)
{
        alias_ty o = (alias_ty)_o;
        PyObject *result = NULL, *value = NULL;
        if (!o) {
                Py_INCREF(Py_None);
                return Py_None;
        }

        result = PyType_GenericNew(alias_type, NULL, NULL);
        if (!result) return NULL;
        value = ast2obj_identifier(o->name);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "name", value) == -1)
                goto failed;
        Py_DECREF(value);
        value = ast2obj_identifier(o->asname);
        if (!value) goto failed;
        if (PyObject_SetAttrString(result, "asname", value) == -1)
                goto failed;
        Py_DECREF(value);

        return result;
failed:
        Py_XDECREF(value);
        Py_XDECREF(result);
        return NULL;
}



PyObject* PyAST_mod2obj(mod_ty t)
{
    init_types();
    return ast2obj_mod(t);
}