fix ya.make

1 files changed, 0 insertions, 977 deletions

diff --git a/contrib/tools/python3/src/Python/ast_unparse.c b/contrib/tools/python3/src/Python/ast_unparse.c
deleted file mode 100644
index 126e9047d5..0000000000
--- a/contrib/tools/python3/src/Python/ast_unparse.c
+++ /dev/null
@@ -1,977 +0,0 @@
-#include "Python.h"
-#include "pycore_ast.h"           // expr_ty
-#include <float.h>                // DBL_MAX_10_EXP
-#include <stdbool.h>
-
-/* This limited unparser is used to convert annotations back to strings
- * during compilation rather than being a full AST unparser.
- * See ast.unparse for a full unparser (written in Python)
- */
-
-static PyObject *_str_open_br;
-static PyObject *_str_dbl_open_br;
-static PyObject *_str_close_br;
-static PyObject *_str_dbl_close_br;
-static PyObject *_str_inf;
-static PyObject *_str_replace_inf;
-
-/* Forward declarations for recursion via helper functions. */
-static PyObject *
-expr_as_unicode(expr_ty e, int level);
-static int
-append_ast_expr(_PyUnicodeWriter *writer, expr_ty e, int level);
-static int
-append_joinedstr(_PyUnicodeWriter *writer, expr_ty e, bool is_format_spec);
-static int
-append_formattedvalue(_PyUnicodeWriter *writer, expr_ty e);
-static int
-append_ast_slice(_PyUnicodeWriter *writer, expr_ty e);
-
-static int
-append_charp(_PyUnicodeWriter *writer, const char *charp)
-{
-    return _PyUnicodeWriter_WriteASCIIString(writer, charp, -1);
-}
-
-#define APPEND_STR_FINISH(str)  do { \
-        return append_charp(writer, (str)); \
-    } while (0)
-
-#define APPEND_STR(str)  do { \
-        if (-1 == append_charp(writer, (str))) { \
-            return -1; \
-        } \
-    } while (0)
-
-#define APPEND_STR_IF(cond, str)  do { \
-        if ((cond) && -1 == append_charp(writer, (str))) { \
-            return -1; \
-        } \
-    } while (0)
-
-#define APPEND_STR_IF_NOT_FIRST(str)  do { \
-        APPEND_STR_IF(!first, (str)); \
-        first = false; \
-    } while (0)
-
-#define APPEND_EXPR(expr, pr)  do { \
-        if (-1 == append_ast_expr(writer, (expr), (pr))) { \
-            return -1; \
-        } \
-    } while (0)
-
-#define APPEND(type, value)  do { \
-        if (-1 == append_ast_ ## type(writer, (value))) { \
-            return -1; \
-        } \
-    } while (0)
-
-static int
-append_repr(_PyUnicodeWriter *writer, PyObject *obj)
-{
-    PyObject *repr = PyObject_Repr(obj);
-
-    if (!repr) {
-        return -1;
-    }
-
-    if ((PyFloat_CheckExact(obj) && Py_IS_INFINITY(PyFloat_AS_DOUBLE(obj))) ||
-       PyComplex_CheckExact(obj))
-    {
-        PyObject *new_repr = PyUnicode_Replace(
-            repr,
-            _str_inf,
-            _str_replace_inf,
-            -1
-        );
-        Py_DECREF(repr);
-        if (!new_repr) {
-            return -1;
-        }
-        repr = new_repr;
-    }
-    int ret = _PyUnicodeWriter_WriteStr(writer, repr);
-    Py_DECREF(repr);
-    return ret;
-}
-
-/* Priority levels */
-
-enum {
-    PR_TUPLE,
-    PR_TEST,            /* 'if'-'else', 'lambda' */
-    PR_OR,              /* 'or' */
-    PR_AND,             /* 'and' */
-    PR_NOT,             /* 'not' */
-    PR_CMP,             /* '<', '>', '==', '>=', '<=', '!=',
-                           'in', 'not in', 'is', 'is not' */
-    PR_EXPR,
-    PR_BOR = PR_EXPR,   /* '|' */
-    PR_BXOR,            /* '^' */
-    PR_BAND,            /* '&' */
-    PR_SHIFT,           /* '<<', '>>' */
-    PR_ARITH,           /* '+', '-' */
-    PR_TERM,            /* '*', '@', '/', '%', '//' */
-    PR_FACTOR,          /* unary '+', '-', '~' */
-    PR_POWER,           /* '**' */
-    PR_AWAIT,           /* 'await' */
-    PR_ATOM,
-};
-
-static int
-append_ast_boolop(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    Py_ssize_t i, value_count;
-    asdl_expr_seq *values;
-    const char *op = (e->v.BoolOp.op == And) ? " and " : " or ";
-    int pr = (e->v.BoolOp.op == And) ? PR_AND : PR_OR;
-
-    APPEND_STR_IF(level > pr, "(");
-
-    values = e->v.BoolOp.values;
-    value_count = asdl_seq_LEN(values);
-
-    for (i = 0; i < value_count; ++i) {
-        APPEND_STR_IF(i > 0, op);
-        APPEND_EXPR((expr_ty)asdl_seq_GET(values, i), pr + 1);
-    }
-
-    APPEND_STR_IF(level > pr, ")");
-    return 0;
-}
-
-static int
-append_ast_binop(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    const char *op;
-    int pr;
-    bool rassoc = false;  /* is right-associative? */
-
-    switch (e->v.BinOp.op) {
-    case Add: op = " + "; pr = PR_ARITH; break;
-    case Sub: op = " - "; pr = PR_ARITH; break;
-    case Mult: op = " * "; pr = PR_TERM; break;
-    case MatMult: op = " @ "; pr = PR_TERM; break;
-    case Div: op = " / "; pr = PR_TERM; break;
-    case Mod: op = " % "; pr = PR_TERM; break;
-    case LShift: op = " << "; pr = PR_SHIFT; break;
-    case RShift: op = " >> "; pr = PR_SHIFT; break;
-    case BitOr: op = " | "; pr = PR_BOR; break;
-    case BitXor: op = " ^ "; pr = PR_BXOR; break;
-    case BitAnd: op = " & "; pr = PR_BAND; break;
-    case FloorDiv: op = " // "; pr = PR_TERM; break;
-    case Pow: op = " ** "; pr = PR_POWER; rassoc = true; break;
-    default:
-        PyErr_SetString(PyExc_SystemError,
-                        "unknown binary operator");
-        return -1;
-    }
-
-    APPEND_STR_IF(level > pr, "(");
-    APPEND_EXPR(e->v.BinOp.left, pr + rassoc);
-    APPEND_STR(op);
-    APPEND_EXPR(e->v.BinOp.right, pr + !rassoc);
-    APPEND_STR_IF(level > pr, ")");
-    return 0;
-}
-
-static int
-append_ast_unaryop(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    const char *op;
-    int pr;
-
-    switch (e->v.UnaryOp.op) {
-    case Invert: op = "~"; pr = PR_FACTOR; break;
-    case Not: op = "not "; pr = PR_NOT; break;
-    case UAdd: op = "+"; pr = PR_FACTOR; break;
-    case USub: op = "-"; pr = PR_FACTOR; break;
-    default:
-        PyErr_SetString(PyExc_SystemError,
-                        "unknown unary operator");
-        return -1;
-    }
-
-    APPEND_STR_IF(level > pr, "(");
-    APPEND_STR(op);
-    APPEND_EXPR(e->v.UnaryOp.operand, pr);
-    APPEND_STR_IF(level > pr, ")");
-    return 0;
-}
-
-static int
-append_ast_arg(_PyUnicodeWriter *writer, arg_ty arg)
-{
-    if (-1 == _PyUnicodeWriter_WriteStr(writer, arg->arg)) {
-        return -1;
-    }
-    if (arg->annotation) {
-        APPEND_STR(": ");
-        APPEND_EXPR(arg->annotation, PR_TEST);
-    }
-    return 0;
-}
-
-static int
-append_ast_args(_PyUnicodeWriter *writer, arguments_ty args)
-{
-    bool first;
-    Py_ssize_t i, di, arg_count, posonlyarg_count, default_count;
-
-    first = true;
-
-    /* positional-only and positional arguments with defaults */
-    posonlyarg_count = asdl_seq_LEN(args->posonlyargs);
-    arg_count = asdl_seq_LEN(args->args);
-    default_count = asdl_seq_LEN(args->defaults);
-    for (i = 0; i < posonlyarg_count + arg_count; i++) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        if (i < posonlyarg_count){
-            APPEND(arg, (arg_ty)asdl_seq_GET(args->posonlyargs, i));
-        } else {
-            APPEND(arg, (arg_ty)asdl_seq_GET(args->args, i-posonlyarg_count));
-        }
-
-        di = i - posonlyarg_count - arg_count + default_count;
-        if (di >= 0) {
-            APPEND_STR("=");
-            APPEND_EXPR((expr_ty)asdl_seq_GET(args->defaults, di), PR_TEST);
-        }
-        if (posonlyarg_count && i + 1 == posonlyarg_count) {
-            APPEND_STR(", /");
-        }
-    }
-
-    /* vararg, or bare '*' if no varargs but keyword-only arguments present */
-    if (args->vararg || asdl_seq_LEN(args->kwonlyargs)) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        APPEND_STR("*");
-        if (args->vararg) {
-            APPEND(arg, args->vararg);
-        }
-    }
-
-    /* keyword-only arguments */
-    arg_count = asdl_seq_LEN(args->kwonlyargs);
-    default_count = asdl_seq_LEN(args->kw_defaults);
-    for (i = 0; i < arg_count; i++) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        APPEND(arg, (arg_ty)asdl_seq_GET(args->kwonlyargs, i));
-
-        di = i - arg_count + default_count;
-        if (di >= 0) {
-            expr_ty default_ = (expr_ty)asdl_seq_GET(args->kw_defaults, di);
-            if (default_) {
-                APPEND_STR("=");
-                APPEND_EXPR(default_, PR_TEST);
-            }
-        }
-    }
-
-    /* **kwargs */
-    if (args->kwarg) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        APPEND_STR("**");
-        APPEND(arg, args->kwarg);
-    }
-
-    return 0;
-}
-
-static int
-append_ast_lambda(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    APPEND_STR_IF(level > PR_TEST, "(");
-    Py_ssize_t n_positional = (asdl_seq_LEN(e->v.Lambda.args->args) +
-                               asdl_seq_LEN(e->v.Lambda.args->posonlyargs));
-    APPEND_STR(n_positional ? "lambda " : "lambda");
-    APPEND(args, e->v.Lambda.args);
-    APPEND_STR(": ");
-    APPEND_EXPR(e->v.Lambda.body, PR_TEST);
-    APPEND_STR_IF(level > PR_TEST, ")");
-    return 0;
-}
-
-static int
-append_ast_ifexp(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    APPEND_STR_IF(level > PR_TEST, "(");
-    APPEND_EXPR(e->v.IfExp.body, PR_TEST + 1);
-    APPEND_STR(" if ");
-    APPEND_EXPR(e->v.IfExp.test, PR_TEST + 1);
-    APPEND_STR(" else ");
-    APPEND_EXPR(e->v.IfExp.orelse, PR_TEST);
-    APPEND_STR_IF(level > PR_TEST, ")");
-    return 0;
-}
-
-static int
-append_ast_dict(_PyUnicodeWriter *writer, expr_ty e)
-{
-    Py_ssize_t i, value_count;
-    expr_ty key_node;
-
-    APPEND_STR("{");
-    value_count = asdl_seq_LEN(e->v.Dict.values);
-
-    for (i = 0; i < value_count; i++) {
-        APPEND_STR_IF(i > 0, ", ");
-        key_node = (expr_ty)asdl_seq_GET(e->v.Dict.keys, i);
-        if (key_node != NULL) {
-            APPEND_EXPR(key_node, PR_TEST);
-            APPEND_STR(": ");
-            APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.Dict.values, i), PR_TEST);
-        }
-        else {
-            APPEND_STR("**");
-            APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.Dict.values, i), PR_EXPR);
-        }
-    }
-
-    APPEND_STR_FINISH("}");
-}
-
-static int
-append_ast_set(_PyUnicodeWriter *writer, expr_ty e)
-{
-    Py_ssize_t i, elem_count;
-
-    APPEND_STR("{");
-    elem_count = asdl_seq_LEN(e->v.Set.elts);
-    for (i = 0; i < elem_count; i++) {
-        APPEND_STR_IF(i > 0, ", ");
-        APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.Set.elts, i), PR_TEST);
-    }
-
-    APPEND_STR_FINISH("}");
-}
-
-static int
-append_ast_list(_PyUnicodeWriter *writer, expr_ty e)
-{
-    Py_ssize_t i, elem_count;
-
-    APPEND_STR("[");
-    elem_count = asdl_seq_LEN(e->v.List.elts);
-    for (i = 0; i < elem_count; i++) {
-        APPEND_STR_IF(i > 0, ", ");
-        APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.List.elts, i), PR_TEST);
-    }
-
-    APPEND_STR_FINISH("]");
-}
-
-static int
-append_ast_tuple(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    Py_ssize_t i, elem_count;
-
-    elem_count = asdl_seq_LEN(e->v.Tuple.elts);
-
-    if (elem_count == 0) {
-        APPEND_STR_FINISH("()");
-    }
-
-    APPEND_STR_IF(level > PR_TUPLE, "(");
-
-    for (i = 0; i < elem_count; i++) {
-        APPEND_STR_IF(i > 0, ", ");
-        APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.Tuple.elts, i), PR_TEST);
-    }
-
-    APPEND_STR_IF(elem_count == 1, ",");
-    APPEND_STR_IF(level > PR_TUPLE, ")");
-    return 0;
-}
-
-static int
-append_ast_comprehension(_PyUnicodeWriter *writer, comprehension_ty gen)
-{
-    Py_ssize_t i, if_count;
-
-    APPEND_STR(gen->is_async ? " async for " : " for ");
-    APPEND_EXPR(gen->target, PR_TUPLE);
-    APPEND_STR(" in ");
-    APPEND_EXPR(gen->iter, PR_TEST + 1);
-
-    if_count = asdl_seq_LEN(gen->ifs);
-    for (i = 0; i < if_count; i++) {
-        APPEND_STR(" if ");
-        APPEND_EXPR((expr_ty)asdl_seq_GET(gen->ifs, i), PR_TEST + 1);
-    }
-    return 0;
-}
-
-static int
-append_ast_comprehensions(_PyUnicodeWriter *writer, asdl_comprehension_seq *comprehensions)
-{
-    Py_ssize_t i, gen_count;
-    gen_count = asdl_seq_LEN(comprehensions);
-
-    for (i = 0; i < gen_count; i++) {
-        APPEND(comprehension, (comprehension_ty)asdl_seq_GET(comprehensions, i));
-    }
-
-    return 0;
-}
-
-static int
-append_ast_genexp(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("(");
-    APPEND_EXPR(e->v.GeneratorExp.elt, PR_TEST);
-    APPEND(comprehensions, e->v.GeneratorExp.generators);
-    APPEND_STR_FINISH(")");
-}
-
-static int
-append_ast_listcomp(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("[");
-    APPEND_EXPR(e->v.ListComp.elt, PR_TEST);
-    APPEND(comprehensions, e->v.ListComp.generators);
-    APPEND_STR_FINISH("]");
-}
-
-static int
-append_ast_setcomp(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("{");
-    APPEND_EXPR(e->v.SetComp.elt, PR_TEST);
-    APPEND(comprehensions, e->v.SetComp.generators);
-    APPEND_STR_FINISH("}");
-}
-
-static int
-append_ast_dictcomp(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("{");
-    APPEND_EXPR(e->v.DictComp.key, PR_TEST);
-    APPEND_STR(": ");
-    APPEND_EXPR(e->v.DictComp.value, PR_TEST);
-    APPEND(comprehensions, e->v.DictComp.generators);
-    APPEND_STR_FINISH("}");
-}
-
-static int
-append_ast_compare(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    const char *op;
-    Py_ssize_t i, comparator_count;
-    asdl_expr_seq *comparators;
-    asdl_int_seq *ops;
-
-    APPEND_STR_IF(level > PR_CMP, "(");
-
-    comparators = e->v.Compare.comparators;
-    ops = e->v.Compare.ops;
-    comparator_count = asdl_seq_LEN(comparators);
-    assert(comparator_count > 0);
-    assert(comparator_count == asdl_seq_LEN(ops));
-
-    APPEND_EXPR(e->v.Compare.left, PR_CMP + 1);
-
-    for (i = 0; i < comparator_count; i++) {
-        switch ((cmpop_ty)asdl_seq_GET(ops, i)) {
-        case Eq:
-            op = " == ";
-            break;
-        case NotEq:
-            op = " != ";
-            break;
-        case Lt:
-            op = " < ";
-            break;
-        case LtE:
-            op = " <= ";
-            break;
-        case Gt:
-            op = " > ";
-            break;
-        case GtE:
-            op = " >= ";
-            break;
-        case Is:
-            op = " is ";
-            break;
-        case IsNot:
-            op = " is not ";
-            break;
-        case In:
-            op = " in ";
-            break;
-        case NotIn:
-            op = " not in ";
-            break;
-        default:
-            PyErr_SetString(PyExc_SystemError,
-                            "unexpected comparison kind");
-            return -1;
-        }
-
-        APPEND_STR(op);
-        APPEND_EXPR((expr_ty)asdl_seq_GET(comparators, i), PR_CMP + 1);
-    }
-
-    APPEND_STR_IF(level > PR_CMP, ")");
-    return 0;
-}
-
-static int
-append_ast_keyword(_PyUnicodeWriter *writer, keyword_ty kw)
-{
-    if (kw->arg == NULL) {
-        APPEND_STR("**");
-    }
-    else {
-        if (-1 == _PyUnicodeWriter_WriteStr(writer, kw->arg)) {
-            return -1;
-        }
-
-        APPEND_STR("=");
-    }
-
-    APPEND_EXPR(kw->value, PR_TEST);
-    return 0;
-}
-
-static int
-append_ast_call(_PyUnicodeWriter *writer, expr_ty e)
-{
-    bool first;
-    Py_ssize_t i, arg_count, kw_count;
-    expr_ty expr;
-
-    APPEND_EXPR(e->v.Call.func, PR_ATOM);
-
-    arg_count = asdl_seq_LEN(e->v.Call.args);
-    kw_count = asdl_seq_LEN(e->v.Call.keywords);
-    if (arg_count == 1 && kw_count == 0) {
-        expr = (expr_ty)asdl_seq_GET(e->v.Call.args, 0);
-        if (expr->kind == GeneratorExp_kind) {
-            /* Special case: a single generator expression. */
-            return append_ast_genexp(writer, expr);
-        }
-    }
-
-    APPEND_STR("(");
-
-    first = true;
-    for (i = 0; i < arg_count; i++) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        APPEND_EXPR((expr_ty)asdl_seq_GET(e->v.Call.args, i), PR_TEST);
-    }
-
-    for (i = 0; i < kw_count; i++) {
-        APPEND_STR_IF_NOT_FIRST(", ");
-        APPEND(keyword, (keyword_ty)asdl_seq_GET(e->v.Call.keywords, i));
-    }
-
-    APPEND_STR_FINISH(")");
-}
-
-static PyObject *
-escape_braces(PyObject *orig)
-{
-    PyObject *temp;
-    PyObject *result;
-    temp = PyUnicode_Replace(orig, _str_open_br, _str_dbl_open_br, -1);
-    if (!temp) {
-        return NULL;
-    }
-    result = PyUnicode_Replace(temp, _str_close_br, _str_dbl_close_br, -1);
-    Py_DECREF(temp);
-    return result;
-}
-
-static int
-append_fstring_unicode(_PyUnicodeWriter *writer, PyObject *unicode)
-{
-    PyObject *escaped;
-    int result = -1;
-    escaped = escape_braces(unicode);
-    if (escaped) {
-        result = _PyUnicodeWriter_WriteStr(writer, escaped);
-        Py_DECREF(escaped);
-    }
-    return result;
-}
-
-static int
-append_fstring_element(_PyUnicodeWriter *writer, expr_ty e, bool is_format_spec)
-{
-    switch (e->kind) {
-    case Constant_kind:
-        return append_fstring_unicode(writer, e->v.Constant.value);
-    case JoinedStr_kind:
-        return append_joinedstr(writer, e, is_format_spec);
-    case FormattedValue_kind:
-        return append_formattedvalue(writer, e);
-    default:
-        PyErr_SetString(PyExc_SystemError,
-                        "unknown expression kind inside f-string");
-        return -1;
-    }
-}
-
-/* Build body separately to enable wrapping the entire stream of Strs,
-   Constants and FormattedValues in one opening and one closing quote. */
-static PyObject *
-build_fstring_body(asdl_expr_seq *values, bool is_format_spec)
-{
-    Py_ssize_t i, value_count;
-    _PyUnicodeWriter body_writer;
-    _PyUnicodeWriter_Init(&body_writer);
-    body_writer.min_length = 256;
-    body_writer.overallocate = 1;
-
-    value_count = asdl_seq_LEN(values);
-    for (i = 0; i < value_count; ++i) {
-        if (-1 == append_fstring_element(&body_writer,
-                                         (expr_ty)asdl_seq_GET(values, i),
-                                         is_format_spec
-                                         )) {
-            _PyUnicodeWriter_Dealloc(&body_writer);
-            return NULL;
-        }
-    }
-
-    return _PyUnicodeWriter_Finish(&body_writer);
-}
-
-static int
-append_joinedstr(_PyUnicodeWriter *writer, expr_ty e, bool is_format_spec)
-{
-    int result = -1;
-    PyObject *body = build_fstring_body(e->v.JoinedStr.values, is_format_spec);
-    if (!body) {
-        return -1;
-    }
-
-    if (!is_format_spec) {
-        if (-1 != append_charp(writer, "f") &&
-            -1 != append_repr(writer, body))
-        {
-            result = 0;
-        }
-    }
-    else {
-        result = _PyUnicodeWriter_WriteStr(writer, body);
-    }
-    Py_DECREF(body);
-    return result;
-}
-
-static int
-append_formattedvalue(_PyUnicodeWriter *writer, expr_ty e)
-{
-    const char *conversion;
-    const char *outer_brace = "{";
-    /* Grammar allows PR_TUPLE, but use >PR_TEST for adding parenthesis
-       around a lambda with ':' */
-    PyObject *temp_fv_str = expr_as_unicode(e->v.FormattedValue.value, PR_TEST + 1);
-    if (!temp_fv_str) {
-        return -1;
-    }
-    if (PyUnicode_Find(temp_fv_str, _str_open_br, 0, 1, 1) == 0) {
-        /* Expression starts with a brace, split it with a space from the outer
-           one. */
-        outer_brace = "{ ";
-    }
-    if (-1 == append_charp(writer, outer_brace)) {
-        Py_DECREF(temp_fv_str);
-        return -1;
-    }
-    if (-1 == _PyUnicodeWriter_WriteStr(writer, temp_fv_str)) {
-        Py_DECREF(temp_fv_str);
-        return -1;
-    }
-    Py_DECREF(temp_fv_str);
-
-    if (e->v.FormattedValue.conversion > 0) {
-        switch (e->v.FormattedValue.conversion) {
-        case 'a':
-            conversion = "!a";
-            break;
-        case 'r':
-            conversion = "!r";
-            break;
-        case 's':
-            conversion = "!s";
-            break;
-        default:
-            PyErr_SetString(PyExc_SystemError,
-                            "unknown f-value conversion kind");
-            return -1;
-        }
-        APPEND_STR(conversion);
-    }
-    if (e->v.FormattedValue.format_spec) {
-        if (-1 == _PyUnicodeWriter_WriteASCIIString(writer, ":", 1) ||
-            -1 == append_fstring_element(writer,
-                                         e->v.FormattedValue.format_spec,
-                                         true
-                                        ))
-        {
-            return -1;
-        }
-    }
-
-    APPEND_STR_FINISH("}");
-}
-
-static int
-append_ast_constant(_PyUnicodeWriter *writer, PyObject *constant)
-{
-    if (PyTuple_CheckExact(constant)) {
-        Py_ssize_t i, elem_count;
-
-        elem_count = PyTuple_GET_SIZE(constant);
-        APPEND_STR("(");
-        for (i = 0; i < elem_count; i++) {
-            APPEND_STR_IF(i > 0, ", ");
-            if (append_ast_constant(writer, PyTuple_GET_ITEM(constant, i)) < 0) {
-                return -1;
-            }
-        }
-
-        APPEND_STR_IF(elem_count == 1, ",");
-        APPEND_STR(")");
-        return 0;
-    }
-    return append_repr(writer, constant);
-}
-
-static int
-append_ast_attribute(_PyUnicodeWriter *writer, expr_ty e)
-{
-    const char *period;
-    expr_ty v = e->v.Attribute.value;
-    APPEND_EXPR(v, PR_ATOM);
-
-    /* Special case: integers require a space for attribute access to be
-       unambiguous. */
-    if (v->kind == Constant_kind && PyLong_CheckExact(v->v.Constant.value)) {
-        period = " .";
-    }
-    else {
-        period = ".";
-    }
-    APPEND_STR(period);
-
-    return _PyUnicodeWriter_WriteStr(writer, e->v.Attribute.attr);
-}
-
-static int
-append_ast_slice(_PyUnicodeWriter *writer, expr_ty e)
-{
-    if (e->v.Slice.lower) {
-        APPEND_EXPR(e->v.Slice.lower, PR_TEST);
-    }
-
-    APPEND_STR(":");
-
-    if (e->v.Slice.upper) {
-        APPEND_EXPR(e->v.Slice.upper, PR_TEST);
-    }
-
-    if (e->v.Slice.step) {
-        APPEND_STR(":");
-        APPEND_EXPR(e->v.Slice.step, PR_TEST);
-    }
-    return 0;
-}
-
-static int
-append_ast_subscript(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_EXPR(e->v.Subscript.value, PR_ATOM);
-    int level = PR_TUPLE;
-    expr_ty slice = e->v.Subscript.slice;
-    if (slice->kind == Tuple_kind) {
-        for (Py_ssize_t i = 0; i < asdl_seq_LEN(slice->v.Tuple.elts); i++) {
-            expr_ty element = asdl_seq_GET(slice->v.Tuple.elts, i);
-            if (element->kind == Starred_kind) {
-                ++level;
-                break;
-            }
-        }
-    }
-    APPEND_STR("[");
-    APPEND_EXPR(e->v.Subscript.slice, level);
-    APPEND_STR_FINISH("]");
-}
-
-static int
-append_ast_starred(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("*");
-    APPEND_EXPR(e->v.Starred.value, PR_EXPR);
-    return 0;
-}
-
-static int
-append_ast_yield(_PyUnicodeWriter *writer, expr_ty e)
-{
-    if (!e->v.Yield.value) {
-        APPEND_STR_FINISH("(yield)");
-    }
-
-    APPEND_STR("(yield ");
-    APPEND_EXPR(e->v.Yield.value, PR_TEST);
-    APPEND_STR_FINISH(")");
-}
-
-static int
-append_ast_yield_from(_PyUnicodeWriter *writer, expr_ty e)
-{
-    APPEND_STR("(yield from ");
-    APPEND_EXPR(e->v.YieldFrom.value, PR_TEST);
-    APPEND_STR_FINISH(")");
-}
-
-static int
-append_ast_await(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    APPEND_STR_IF(level > PR_AWAIT, "(");
-    APPEND_STR("await ");
-    APPEND_EXPR(e->v.Await.value, PR_ATOM);
-    APPEND_STR_IF(level > PR_AWAIT, ")");
-    return 0;
-}
-
-static int
-append_named_expr(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    APPEND_STR_IF(level > PR_TUPLE, "(");
-    APPEND_EXPR(e->v.NamedExpr.target, PR_ATOM);
-    APPEND_STR(" := ");
-    APPEND_EXPR(e->v.NamedExpr.value, PR_ATOM);
-    APPEND_STR_IF(level > PR_TUPLE, ")");
-    return 0;
-}
-
-static int
-append_ast_expr(_PyUnicodeWriter *writer, expr_ty e, int level)
-{
-    switch (e->kind) {
-    case BoolOp_kind:
-        return append_ast_boolop(writer, e, level);
-    case BinOp_kind:
-        return append_ast_binop(writer, e, level);
-    case UnaryOp_kind:
-        return append_ast_unaryop(writer, e, level);
-    case Lambda_kind:
-        return append_ast_lambda(writer, e, level);
-    case IfExp_kind:
-        return append_ast_ifexp(writer, e, level);
-    case Dict_kind:
-        return append_ast_dict(writer, e);
-    case Set_kind:
-        return append_ast_set(writer, e);
-    case GeneratorExp_kind:
-        return append_ast_genexp(writer, e);
-    case ListComp_kind:
-        return append_ast_listcomp(writer, e);
-    case SetComp_kind:
-        return append_ast_setcomp(writer, e);
-    case DictComp_kind:
-        return append_ast_dictcomp(writer, e);
-    case Yield_kind:
-        return append_ast_yield(writer, e);
-    case YieldFrom_kind:
-        return append_ast_yield_from(writer, e);
-    case Await_kind:
-        return append_ast_await(writer, e, level);
-    case Compare_kind:
-        return append_ast_compare(writer, e, level);
-    case Call_kind:
-        return append_ast_call(writer, e);
-    case Constant_kind:
-        if (e->v.Constant.value == Py_Ellipsis) {
-            APPEND_STR_FINISH("...");
-        }
-        if (e->v.Constant.kind != NULL
-            && -1 == _PyUnicodeWriter_WriteStr(writer, e->v.Constant.kind)) {
-            return -1;
-        }
-        return append_ast_constant(writer, e->v.Constant.value);
-    case JoinedStr_kind:
-        return append_joinedstr(writer, e, false);
-    case FormattedValue_kind:
-        return append_formattedvalue(writer, e);
-    /* The following exprs can be assignment targets. */
-    case Attribute_kind:
-        return append_ast_attribute(writer, e);
-    case Subscript_kind:
-        return append_ast_subscript(writer, e);
-    case Starred_kind:
-        return append_ast_starred(writer, e);
-    case Slice_kind:
-        return append_ast_slice(writer, e);
-    case Name_kind:
-        return _PyUnicodeWriter_WriteStr(writer, e->v.Name.id);
-    case List_kind:
-        return append_ast_list(writer, e);
-    case Tuple_kind:
-        return append_ast_tuple(writer, e, level);
-    case NamedExpr_kind:
-        return append_named_expr(writer, e, level);
-    // No default so compiler emits a warning for unhandled cases
-    }
-    PyErr_SetString(PyExc_SystemError,
-                    "unknown expression kind");
-    return -1;
-}
-
-static int
-maybe_init_static_strings(void)
-{
-    if (!_str_open_br &&
-        !(_str_open_br = PyUnicode_InternFromString("{"))) {
-        return -1;
-    }
-    if (!_str_dbl_open_br &&
-        !(_str_dbl_open_br = PyUnicode_InternFromString("{{"))) {
-        return -1;
-    }
-    if (!_str_close_br &&
-        !(_str_close_br = PyUnicode_InternFromString("}"))) {
-        return -1;
-    }
-    if (!_str_dbl_close_br &&
-        !(_str_dbl_close_br = PyUnicode_InternFromString("}}"))) {
-        return -1;
-    }
-    if (!_str_inf &&
-        !(_str_inf = PyUnicode_FromString("inf"))) {
-        return -1;
-    }
-    if (!_str_replace_inf &&
-        !(_str_replace_inf = PyUnicode_FromFormat("1e%d", 1 + DBL_MAX_10_EXP))) {
-        return -1;
-    }
-    return 0;
-}
-
-static PyObject *
-expr_as_unicode(expr_ty e, int level)
-{
-    _PyUnicodeWriter writer;
-    _PyUnicodeWriter_Init(&writer);
-    writer.min_length = 256;
-    writer.overallocate = 1;
-    if (-1 == maybe_init_static_strings() ||
-        -1 == append_ast_expr(&writer, e, level))
-    {
-        _PyUnicodeWriter_Dealloc(&writer);
-        return NULL;
-    }
-    return _PyUnicodeWriter_Finish(&writer);
-}
-
-PyObject *
-_PyAST_ExprAsUnicode(expr_ty e)
-{
-    return expr_as_unicode(e, PR_TEST);
-}