#!/usr/bin/env python ## vim:ts=4:et:nowrap """A user-defined wrapper around string objects Note: string objects have grown methods in Python 1.6 This module requires Python 1.6 or later. """ from types import StringTypes import sys __all__ = ["UserString","MutableString"] class UserString: def __init__(self, seq): if isinstance(seq, StringTypes): self.data = seq elif isinstance(seq, UserString): self.data = seq.data[:] else: self.data = str(seq) def __str__(self): return str(self.data) def __repr__(self): return repr(self.data) def __int__(self): return int(self.data) def __long__(self): return long(self.data) def __float__(self): return float(self.data) def __complex__(self): return complex(self.data) def __hash__(self): return hash(self.data) def __cmp__(self, string): if isinstance(string, UserString): return cmp(self.data, string.data) else: return cmp(self.data, string) def __contains__(self, char): return char in self.data def __len__(self): return len(self.data) def __getitem__(self, index): return self.__class__(self.data[index]) def __getslice__(self, start, end): start = max(start, 0); end = max(end, 0) return self.__class__(self.data[start:end]) def __add__(self, other): if isinstance(other, UserString): return self.__class__(self.data + other.data) elif isinstance(other, StringTypes): return self.__class__(self.data + other) else: return self.__class__(self.data + str(other)) def __radd__(self, other): if isinstance(other, StringTypes): return self.__class__(other + self.data) else: return self.__class__(str(other) + self.data) def __mul__(self, n): return self.__class__(self.data*n) __rmul__ = __mul__ def __mod__(self, args): return self.__class__(self.data % args) # the following methods are defined in alphabetical order: def capitalize(self): return self.__class__(self.data.capitalize()) def center(self, width, *args): return self.__class__(self.data.center(width, *args)) def count(self, sub, start=0, end=sys.maxint): return self.data.count(sub, start, end) def decode(self, encoding=None, errors=None): # XXX improve this? if encoding: if errors: return self.__class__(self.data.decode(encoding, errors)) else: return self.__class__(self.data.decode(encoding)) else: return self.__class__(self.data.decode()) def encode(self, encoding=None, errors=None): # XXX improve this? if encoding: if errors: return self.__class__(self.data.encode(encoding, errors)) else: return self.__class__(self.data.encode(encoding)) else: return self.__class__(self.data.encode()) def endswith(self, suffix, start=0, end=sys.maxint): return self.data.endswith(suffix, start, end) def expandtabs(self, tabsize=8): return self.__class__(self.data.expandtabs(tabsize)) def find(self, sub, start=0, end=sys.maxint): return self.data.find(sub, start, end) def index(self, sub, start=0, end=sys.maxint): return self.data.index(sub, start, end) def isalpha(self): return self.data.isalpha() def isalnum(self): return self.data.isalnum() def isdecimal(self): return self.data.isdecimal() def isdigit(self): return self.data.isdigit() def islower(self): return self.data.islower() def isnumeric(self): return self.data.isnumeric() def isspace(self): return self.data.isspace() def istitle(self): return self.data.istitle() def isupper(self): return self.data.isupper() def join(self, seq): return self.data.join(seq) def ljust(self, width, *args): return self.__class__(self.data.ljust(width, *args)) def lower(self): return self.__class__(self.data.lower()) def lstrip(self, chars=None): return self.__class__(self.data.lstrip(chars)) def replace(self, old, new, maxsplit=-1): return self.__class__(self.data.replace(old, new, maxsplit)) def rfind(self, sub, start=0, end=sys.maxint): return self.data.rfind(sub, start, end) def rindex(self, sub, start=0, end=sys.maxint): return self.data.rindex(sub, start, end) def rjust(self, width, *args): return self.__class__(self.data.rjust(width, *args)) def rstrip(self, chars=None): return self.__class__(self.data.rstrip(chars)) def split(self, sep=None, maxsplit=-1): return self.data.split(sep, maxsplit) def rsplit(self, sep=None, maxsplit=-1): return self.data.rsplit(sep, maxsplit) def splitlines(self, keepends=0): return self.data.splitlines(keepends) def startswith(self, prefix, start=0, end=sys.maxint): return self.data.startswith(prefix, start, end) def strip(self, chars=None): return self.__class__(self.data.strip(chars)) def swapcase(self): return self.__class__(self.data.swapcase()) def title(self): return self.__class__(self.data.title()) def translate(self, *args): return self.__class__(self.data.translate(*args)) def upper(self): return self.__class__(self.data.upper()) def zfill(self, width): return self.__class__(self.data.zfill(width)) class MutableString(UserString): """mutable string objects Python strings are immutable objects. This has the advantage, that strings may be used as dictionary keys. If this property isn't needed and you insist on changing string values in place instead, you may cheat and use MutableString. But the purpose of this class is an educational one: to prevent people from inventing their own mutable string class derived from UserString and than forget thereby to remove (override) the __hash__ method inherited from UserString. This would lead to errors that would be very hard to track down. A faster and better solution is to rewrite your program using lists.""" def __init__(self, string=""): self.data = string def __hash__(self): raise TypeError, "unhashable type (it is mutable)" def __setitem__(self, index, sub): if index < 0 or index >= len(self.data): raise IndexError self.data = self.data[:index] + sub + self.data[index+1:] def __delitem__(self, index): if index < 0 or index >= len(self.data): raise IndexError self.data = self.data[:index] + self.data[index+1:] def __setslice__(self, start, end, sub): start = max(start, 0); end = max(end, 0) if isinstance(sub, UserString): self.data = self.data[:start]+sub.data+self.data[end:] elif isinstance(sub, StringTypes): self.data = self.data[:start]+sub+self.data[end:] else: self.data = self.data[:start]+str(sub)+self.data[end:] def __delslice__(self, start, end): start = max(start, 0); end = max(end, 0) self.data = self.data[:start] + self.data[end:] def immutable(self): return UserString(self.data) def __iadd__(self, other): if isinstance(other, UserString): self.data += other.data elif isinstance(other, StringTypes): self.data += other else: self.data += str(other) return self def __imul__(self, n): self.data *= n return self if __name__ == "__main__": # execute the regression test to stdout, if called as a script: import os called_in_dir, called_as = os.path.split(sys.argv[0]) called_as, py = os.path.splitext(called_as) if '-q' in sys.argv: from test import test_support test_support.verbose = 0 __import__('test.test_' + called_as.lower()) ef='#n162'>162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 
/* AST Optimizer */
#include "Python.h"
#include "Python-ast.h"
#include "ast.h"


static int
make_const(expr_ty node, PyObject *val, PyArena *arena)
{
    if (val == NULL) {
        if (PyErr_ExceptionMatches(PyExc_KeyboardInterrupt)) {
            return 0;
        }
        PyErr_Clear();
        return 1;
    }
    if (PyArena_AddPyObject(arena, val) < 0) {
        Py_DECREF(val);
        return 0;
    }
    node->kind = Constant_kind;
    node->v.Constant.value = val;
    return 1;
}

#define COPY_NODE(TO, FROM) (memcpy((TO), (FROM), sizeof(struct _expr)))

static PyObject*
unary_not(PyObject *v)
{
    int r = PyObject_IsTrue(v);
    if (r < 0)
        return NULL;
    return PyBool_FromLong(!r);
}

static int
fold_unaryop(expr_ty node, PyArena *arena, int optimize)
{
    expr_ty arg = node->v.UnaryOp.operand;

    if (arg->kind != Constant_kind) {
        /* Fold not into comparison */
        if (node->v.UnaryOp.op == Not && arg->kind == Compare_kind &&
                asdl_seq_LEN(arg->v.Compare.ops) == 1) {
            /* Eq and NotEq are often implemented in terms of one another, so
               folding not (self == other) into self != other breaks implementation
               of !=. Detecting such cases doesn't seem worthwhile.
               Python uses </> for 'is subset'/'is superset' operations on sets.
               They don't satisfy not folding laws. */
            int op = asdl_seq_GET(arg->v.Compare.ops, 0);
            switch (op) {
            case Is:
                op = IsNot;
                break;
            case IsNot:
                op = Is;
                break;
            case In:
                op = NotIn;
                break;
            case NotIn:
                op = In;
                break;
            default:
                op = 0;
            }
            if (op) {
                asdl_seq_SET(arg->v.Compare.ops, 0, op);
                COPY_NODE(node, arg);
                return 1;
            }
        }
        return 1;
    }

    typedef PyObject *(*unary_op)(PyObject*);
    static const unary_op ops[] = {
        [Invert] = PyNumber_Invert,
        [Not] = unary_not,
        [UAdd] = PyNumber_Positive,
        [USub] = PyNumber_Negative,
    };
    PyObject *newval = ops[node->v.UnaryOp.op](arg->v.Constant.value);
    return make_const(node, newval, arena);
}

/* Check whether a collection doesn't containing too much items (including
   subcollections).  This protects from creating a constant that needs
   too much time for calculating a hash.
   "limit" is the maximal number of items.
   Returns the negative number if the total number of items exceeds the
   limit.  Otherwise returns the limit minus the total number of items.
*/

static Py_ssize_t
check_complexity(PyObject *obj, Py_ssize_t limit)
{
    if (PyTuple_Check(obj)) {
        Py_ssize_t i;
        limit -= PyTuple_GET_SIZE(obj);
        for (i = 0; limit >= 0 && i < PyTuple_GET_SIZE(obj); i++) {
            limit = check_complexity(PyTuple_GET_ITEM(obj, i), limit);
        }
        return limit;
    }
    else if (PyFrozenSet_Check(obj)) {
        Py_ssize_t i = 0;
        PyObject *item;
        Py_hash_t hash;
        limit -= PySet_GET_SIZE(obj);
        while (limit >= 0 && _PySet_NextEntry(obj, &i, &item, &hash)) {
            limit = check_complexity(item, limit);
        }
    }
    return limit;
}

#define MAX_INT_SIZE           128  /* bits */
#define MAX_COLLECTION_SIZE    256  /* items */
#define MAX_STR_SIZE          4096  /* characters */
#define MAX_TOTAL_ITEMS       1024  /* including nested collections */

static PyObject *
safe_multiply(PyObject *v, PyObject *w)
{
    if (PyLong_Check(v) && PyLong_Check(w) && Py_SIZE(v) && Py_SIZE(w)) {
        size_t vbits = _PyLong_NumBits(v);
        size_t wbits = _PyLong_NumBits(w);
        if (vbits == (size_t)-1 || wbits == (size_t)-1) {
            return NULL;
        }
        if (vbits + wbits > MAX_INT_SIZE) {
            return NULL;
        }
    }
    else if (PyLong_Check(v) && (PyTuple_Check(w) || PyFrozenSet_Check(w))) {
        Py_ssize_t size = PyTuple_Check(w) ? PyTuple_GET_SIZE(w) :
                                             PySet_GET_SIZE(w);
        if (size) {
            long n = PyLong_AsLong(v);
            if (n < 0 || n > MAX_COLLECTION_SIZE / size) {
                return NULL;
            }
            if (n && check_complexity(w, MAX_TOTAL_ITEMS / n) < 0) {
                return NULL;
            }
        }
    }
    else if (PyLong_Check(v) && (PyUnicode_Check(w) || PyBytes_Check(w))) {
        Py_ssize_t size = PyUnicode_Check(w) ? PyUnicode_GET_LENGTH(w) :
                                               PyBytes_GET_SIZE(w);
        if (size) {
            long n = PyLong_AsLong(v);
            if (n < 0 || n > MAX_STR_SIZE / size) {
                return NULL;
            }
        }
    }
    else if (PyLong_Check(w) &&
             (PyTuple_Check(v) || PyFrozenSet_Check(v) ||
              PyUnicode_Check(v) || PyBytes_Check(v)))
    {
        return safe_multiply(w, v);
    }

    return PyNumber_Multiply(v, w);
}

static PyObject *
safe_power(PyObject *v, PyObject *w)
{
    if (PyLong_Check(v) && PyLong_Check(w) && Py_SIZE(v) && Py_SIZE(w) > 0) {
        size_t vbits = _PyLong_NumBits(v);
        size_t wbits = PyLong_AsSize_t(w);
        if (vbits == (size_t)-1 || wbits == (size_t)-1) {
            return NULL;
        }
        if (vbits > MAX_INT_SIZE / wbits) {
            return NULL;
        }
    }

    return PyNumber_Power(v, w, Py_None);
}

static PyObject *
safe_lshift(PyObject *v, PyObject *w)
{
    if (PyLong_Check(v) && PyLong_Check(w) && Py_SIZE(v) && Py_SIZE(w)) {
        size_t vbits = _PyLong_NumBits(v);
        size_t wbits = PyLong_AsSize_t(w);
        if (vbits == (size_t)-1 || wbits == (size_t)-1) {
            return NULL;
        }
        if (wbits > MAX_INT_SIZE || vbits > MAX_INT_SIZE - wbits) {
            return NULL;
        }
    }

    return PyNumber_Lshift(v, w);
}

static PyObject *
safe_mod(PyObject *v, PyObject *w)
{
    if (PyUnicode_Check(v) || PyBytes_Check(v)) {
        return NULL;
    }

    return PyNumber_Remainder(v, w);
}

static int
fold_binop(expr_ty node, PyArena *arena, int optimize)
{
    expr_ty lhs, rhs;
    lhs = node->v.BinOp.left;
    rhs = node->v.BinOp.right;
    if (lhs->kind != Constant_kind || rhs->kind != Constant_kind) {
        return 1;
    }

    PyObject *lv = lhs->v.Constant.value;
    PyObject *rv = rhs->v.Constant.value;
    PyObject *newval;

    switch (node->v.BinOp.op) {
    case Add:
        newval = PyNumber_Add(lv, rv);
        break;
    case Sub:
        newval = PyNumber_Subtract(lv, rv);
        break;
    case Mult:
        newval = safe_multiply(lv, rv);
        break;
    case Div:
        newval = PyNumber_TrueDivide(lv, rv);
        break;
    case FloorDiv:
        newval = PyNumber_FloorDivide(lv, rv);
        break;
    case Mod:
        newval = safe_mod(lv, rv);
        break;
    case Pow:
        newval = safe_power(lv, rv);
        break;
    case LShift:
        newval = safe_lshift(lv, rv);
        break;
    case RShift:
        newval = PyNumber_Rshift(lv, rv);
        break;
    case BitOr:
        newval = PyNumber_Or(lv, rv);
        break;
    case BitXor:
        newval = PyNumber_Xor(lv, rv);
        break;
    case BitAnd:
        newval = PyNumber_And(lv, rv);
        break;
    default: // Unknown operator
        return 1;
    }

    return make_const(node, newval, arena);
}

static PyObject*
make_const_tuple(asdl_seq *elts)
{
    for (int i = 0; i < asdl_seq_LEN(elts); i++) {
        expr_ty e = (expr_ty)asdl_seq_GET(elts, i);
        if (e->kind != Constant_kind) {
            return NULL;
        }
    }

    PyObject *newval = PyTuple_New(asdl_seq_LEN(elts));
    if (newval == NULL) {
        return NULL;
    }

    for (int i = 0; i < asdl_seq_LEN(elts); i++) {
        expr_ty e = (expr_ty)asdl_seq_GET(elts, i);
        PyObject *v = e->v.Constant.value;
        Py_INCREF(v);
        PyTuple_SET_ITEM(newval, i, v);
    }
    return newval;
}

static int
fold_tuple(expr_ty node, PyArena *arena, int optimize)
{
    PyObject *newval;

    if (node->v.Tuple.ctx != Load)
        return 1;

    newval = make_const_tuple(node->v.Tuple.elts);
    return make_const(node, newval, arena);
}

static int
fold_subscr(expr_ty node, PyArena *arena, int optimize)
{
    PyObject *newval;
    expr_ty arg, idx;
    slice_ty slice;

    arg = node->v.Subscript.value;
    slice = node->v.Subscript.slice;
    if (node->v.Subscript.ctx != Load ||
            arg->kind != Constant_kind ||
            /* TODO: handle other types of slices */
            slice->kind != Index_kind ||
            slice->v.Index.value->kind != Constant_kind)
    {
        return 1;
    }

    idx = slice->v.Index.value;
    newval = PyObject_GetItem(arg->v.Constant.value, idx->v.Constant.value);
    return make_const(node, newval, arena);
}

/* Change literal list or set of constants into constant
   tuple or frozenset respectively.  Change literal list of
   non-constants into tuple.
   Used for right operand of "in" and "not in" tests and for iterable
   in "for" loop and comprehensions.
*/
static int
fold_iter(expr_ty arg, PyArena *arena, int optimize)
{
    PyObject *newval;
    if (arg->kind == List_kind) {
        /* First change a list into tuple. */
        asdl_seq *elts = arg->v.List.elts;
        Py_ssize_t n = asdl_seq_LEN(elts);
        for (Py_ssize_t i = 0; i < n; i++) {
            expr_ty e = (expr_ty)asdl_seq_GET(elts, i);
            if (e->kind == Starred_kind) {
                return 1;
            }
        }
        expr_context_ty ctx = arg->v.List.ctx;
        arg->kind = Tuple_kind;
        arg->v.Tuple.elts = elts;
        arg->v.Tuple.ctx = ctx;
        /* Try to create a constant tuple. */
        newval = make_const_tuple(elts);
    }
    else if (arg->kind == Set_kind) {
        newval = make_const_tuple(arg->v.Set.elts);
        if (newval) {
            Py_SETREF(newval, PyFrozenSet_New(newval));
        }
    }
    else {
        return 1;
    }
    return make_const(arg, newval, arena);
}

static int
fold_compare(expr_ty node, PyArena *arena, int optimize)
{
    asdl_int_seq *ops;
    asdl_seq *args;
    Py_ssize_t i;

    ops = node->v.Compare.ops;
    args = node->v.Compare.comparators;
    /* TODO: optimize cases with literal arguments. */
    /* Change literal list or set in 'in' or 'not in' into
       tuple or frozenset respectively. */
    i = asdl_seq_LEN(ops) - 1;
    int op = asdl_seq_GET(ops, i);
    if (op == In || op == NotIn) {
        if (!fold_iter((expr_ty)asdl_seq_GET(args, i), arena, optimize)) {
            return 0;
        }
    }
    return 1;
}

static int astfold_mod(mod_ty node_, PyArena *ctx_, int optimize_);
static int astfold_stmt(stmt_ty node_, PyArena *ctx_, int optimize_);
static int astfold_expr(expr_ty node_, PyArena *ctx_, int optimize_);
static int astfold_arguments(arguments_ty node_, PyArena *ctx_, int optimize_);
static int astfold_comprehension(comprehension_ty node_, PyArena *ctx_, int optimize_);
static int astfold_keyword(keyword_ty node_, PyArena *ctx_, int optimize_);
static int astfold_slice(slice_ty node_, PyArena *ctx_, int optimize_);
static int astfold_arg(arg_ty node_, PyArena *ctx_, int optimize_);
static int astfold_withitem(withitem_ty node_, PyArena *ctx_, int optimize_);
static int astfold_excepthandler(excepthandler_ty node_, PyArena *ctx_, int optimize_);
#define CALL(FUNC, TYPE, ARG) \
    if (!FUNC((ARG), ctx_, optimize_)) \
        return 0;

#define CALL_OPT(FUNC, TYPE, ARG) \
    if ((ARG) != NULL && !FUNC((ARG), ctx_, optimize_)) \
        return 0;

#define CALL_SEQ(FUNC, TYPE, ARG) { \
    int i; \
    asdl_seq *seq = (ARG); /* avoid variable capture */ \
    for (i = 0; i < asdl_seq_LEN(seq); i++) { \
        TYPE elt = (TYPE)asdl_seq_GET(seq, i); \
        if (elt != NULL && !FUNC(elt, ctx_, optimize_)) \
            return 0; \
    } \
}

#define CALL_INT_SEQ(FUNC, TYPE, ARG) { \
    int i; \
    asdl_int_seq *seq = (ARG); /* avoid variable capture */ \
    for (i = 0; i < asdl_seq_LEN(seq); i++) { \
        TYPE elt = (TYPE)asdl_seq_GET(seq, i); \
        if (!FUNC(elt, ctx_, optimize_)) \
            return 0; \
    } \
}

static int
astfold_body(asdl_seq *stmts, PyArena *ctx_, int optimize_)
{
    int docstring = _PyAST_GetDocString(stmts) != NULL;
    CALL_SEQ(astfold_stmt, stmt_ty, stmts);
    if (!docstring && _PyAST_GetDocString(stmts) != NULL) {
        stmt_ty st = (stmt_ty)asdl_seq_GET(stmts, 0);
        asdl_seq *values = _Py_asdl_seq_new(1, ctx_);
        if (!values) {
            return 0;
        }
        asdl_seq_SET(values, 0, st->v.Expr.value);
        expr_ty expr = JoinedStr(values, st->lineno, st->col_offset,
                                 st->end_lineno, st->end_col_offset, ctx_);
        if (!expr) {
            return 0;
        }
        st->v.Expr.value = expr;
    }
    return 1;
}

static int
astfold_mod(mod_ty node_, PyArena *ctx_, int optimize_)
{
    switch (node_->kind) {
    case Module_kind:
        CALL(astfold_body, asdl_seq, node_->v.Module.body);
        break;
    case Interactive_kind:
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.Interactive.body);
        break;
    case Expression_kind:
        CALL(astfold_expr, expr_ty, node_->v.Expression.body);
        break;
    case Suite_kind:
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.Suite.body);
        break;
    default:
        break;
    }
    return 1;
}

static int
astfold_expr(expr_ty node_, PyArena *ctx_, int optimize_)
{
    switch (node_->kind) {
    case BoolOp_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.BoolOp.values);
        break;
    case BinOp_kind:
        CALL(astfold_expr, expr_ty, node_->v.BinOp.left);
        CALL(astfold_expr, expr_ty, node_->v.BinOp.right);
        CALL(fold_binop, expr_ty, node_);
        break;
    case UnaryOp_kind:
        CALL(astfold_expr, expr_ty, node_->v.UnaryOp.operand);
        CALL(fold_unaryop, expr_ty, node_);
        break;
    case Lambda_kind:
        CALL(astfold_arguments, arguments_ty, node_->v.Lambda.args);
        CALL(astfold_expr, expr_ty, node_->v.Lambda.body);
        break;
    case IfExp_kind:
        CALL(astfold_expr, expr_ty, node_->v.IfExp.test);
        CALL(astfold_expr, expr_ty, node_->v.IfExp.body);
        CALL(astfold_expr, expr_ty, node_->v.IfExp.orelse);
        break;
    case Dict_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Dict.keys);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Dict.values);
        break;
    case Set_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Set.elts);
        break;
    case ListComp_kind:
        CALL(astfold_expr, expr_ty, node_->v.ListComp.elt);
        CALL_SEQ(astfold_comprehension, comprehension_ty, node_->v.ListComp.generators);
        break;
    case SetComp_kind:
        CALL(astfold_expr, expr_ty, node_->v.SetComp.elt);
        CALL_SEQ(astfold_comprehension, comprehension_ty, node_->v.SetComp.generators);
        break;
    case DictComp_kind:
        CALL(astfold_expr, expr_ty, node_->v.DictComp.key);
        CALL(astfold_expr, expr_ty, node_->v.DictComp.value);
        CALL_SEQ(astfold_comprehension, comprehension_ty, node_->v.DictComp.generators);
        break;
    case GeneratorExp_kind:
        CALL(astfold_expr, expr_ty, node_->v.GeneratorExp.elt);
        CALL_SEQ(astfold_comprehension, comprehension_ty, node_->v.GeneratorExp.generators);
        break;
    case Await_kind:
        CALL(astfold_expr, expr_ty, node_->v.Await.value);
        break;
    case Yield_kind:
        CALL_OPT(astfold_expr, expr_ty, node_->v.Yield.value);
        break;
    case YieldFrom_kind:
        CALL(astfold_expr, expr_ty, node_->v.YieldFrom.value);
        break;
    case Compare_kind:
        CALL(astfold_expr, expr_ty, node_->v.Compare.left);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Compare.comparators);
        CALL(fold_compare, expr_ty, node_);
        break;
    case Call_kind:
        CALL(astfold_expr, expr_ty, node_->v.Call.func);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Call.args);
        CALL_SEQ(astfold_keyword, keyword_ty, node_->v.Call.keywords);
        break;
    case FormattedValue_kind:
        CALL(astfold_expr, expr_ty, node_->v.FormattedValue.value);
        CALL_OPT(astfold_expr, expr_ty, node_->v.FormattedValue.format_spec);
        break;
    case JoinedStr_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.JoinedStr.values);
        break;
    case Attribute_kind:
        CALL(astfold_expr, expr_ty, node_->v.Attribute.value);
        break;
    case Subscript_kind:
        CALL(astfold_expr, expr_ty, node_->v.Subscript.value);
        CALL(astfold_slice, slice_ty, node_->v.Subscript.slice);
        CALL(fold_subscr, expr_ty, node_);
        break;
    case Starred_kind:
        CALL(astfold_expr, expr_ty, node_->v.Starred.value);
        break;
    case List_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.List.elts);
        break;
    case Tuple_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Tuple.elts);
        CALL(fold_tuple, expr_ty, node_);
        break;
    case Name_kind:
        if (_PyUnicode_EqualToASCIIString(node_->v.Name.id, "__debug__")) {
            return make_const(node_, PyBool_FromLong(!optimize_), ctx_);
        }
        break;
    default:
        break;
    }
    return 1;
}

static int
astfold_slice(slice_ty node_, PyArena *ctx_, int optimize_)
{
    switch (node_->kind) {
    case Slice_kind:
        CALL_OPT(astfold_expr, expr_ty, node_->v.Slice.lower);
        CALL_OPT(astfold_expr, expr_ty, node_->v.Slice.upper);
        CALL_OPT(astfold_expr, expr_ty, node_->v.Slice.step);
        break;
    case ExtSlice_kind:
        CALL_SEQ(astfold_slice, slice_ty, node_->v.ExtSlice.dims);
        break;
    case Index_kind:
        CALL(astfold_expr, expr_ty, node_->v.Index.value);
        break;
    default:
        break;
    }
    return 1;
}

static int
astfold_keyword(keyword_ty node_, PyArena *ctx_, int optimize_)
{
    CALL(astfold_expr, expr_ty, node_->value);
    return 1;
}

static int
astfold_comprehension(comprehension_ty node_, PyArena *ctx_, int optimize_)
{
    CALL(astfold_expr, expr_ty, node_->target);
    CALL(astfold_expr, expr_ty, node_->iter);
    CALL_SEQ(astfold_expr, expr_ty, node_->ifs);

    CALL(fold_iter, expr_ty, node_->iter);
    return 1;
}

static int
astfold_arguments(arguments_ty node_, PyArena *ctx_, int optimize_)
{
    CALL_SEQ(astfold_arg, arg_ty, node_->posonlyargs);
    CALL_SEQ(astfold_arg, arg_ty, node_->args);
    CALL_OPT(astfold_arg, arg_ty, node_->vararg);
    CALL_SEQ(astfold_arg, arg_ty, node_->kwonlyargs);
    CALL_SEQ(astfold_expr, expr_ty, node_->kw_defaults);
    CALL_OPT(astfold_arg, arg_ty, node_->kwarg);
    CALL_SEQ(astfold_expr, expr_ty, node_->defaults);
    return 1;
}

static int
astfold_arg(arg_ty node_, PyArena *ctx_, int optimize_)
{
    CALL_OPT(astfold_expr, expr_ty, node_->annotation);
    return 1;
}

static int
astfold_stmt(stmt_ty node_, PyArena *ctx_, int optimize_)
{
    switch (node_->kind) {
    case FunctionDef_kind:
        CALL(astfold_arguments, arguments_ty, node_->v.FunctionDef.args);
        CALL(astfold_body, asdl_seq, node_->v.FunctionDef.body);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.FunctionDef.decorator_list);
        CALL_OPT(astfold_expr, expr_ty, node_->v.FunctionDef.returns);
        break;
    case AsyncFunctionDef_kind:
        CALL(astfold_arguments, arguments_ty, node_->v.AsyncFunctionDef.args);
        CALL(astfold_body, asdl_seq, node_->v.AsyncFunctionDef.body);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.AsyncFunctionDef.decorator_list);
        CALL_OPT(astfold_expr, expr_ty, node_->v.AsyncFunctionDef.returns);
        break;
    case ClassDef_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.ClassDef.bases);
        CALL_SEQ(astfold_keyword, keyword_ty, node_->v.ClassDef.keywords);
        CALL(astfold_body, asdl_seq, node_->v.ClassDef.body);
        CALL_SEQ(astfold_expr, expr_ty, node_->v.ClassDef.decorator_list);
        break;
    case Return_kind:
        CALL_OPT(astfold_expr, expr_ty, node_->v.Return.value);
        break;
    case Delete_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Delete.targets);
        break;
    case Assign_kind:
        CALL_SEQ(astfold_expr, expr_ty, node_->v.Assign.targets);
        CALL(astfold_expr, expr_ty, node_->v.Assign.value);
        break;
    case AugAssign_kind:
        CALL(astfold_expr, expr_ty, node_->v.AugAssign.target);
        CALL(astfold_expr, expr_ty, node_->v.AugAssign.value);
        break;
    case AnnAssign_kind:
        CALL(astfold_expr, expr_ty, node_->v.AnnAssign.target);
        CALL(astfold_expr, expr_ty, node_->v.AnnAssign.annotation);
        CALL_OPT(astfold_expr, expr_ty, node_->v.AnnAssign.value);
        break;
    case For_kind:
        CALL(astfold_expr, expr_ty, node_->v.For.target);
        CALL(astfold_expr, expr_ty, node_->v.For.iter);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.For.body);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.For.orelse);

        CALL(fold_iter, expr_ty, node_->v.For.iter);
        break;
    case AsyncFor_kind:
        CALL(astfold_expr, expr_ty, node_->v.AsyncFor.target);
        CALL(astfold_expr, expr_ty, node_->v.AsyncFor.iter);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.AsyncFor.body);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.AsyncFor.orelse);
        break;
    case While_kind:
        CALL(astfold_expr, expr_ty, node_->v.While.test);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.While.body);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.While.orelse);
        break;
    case If_kind:
        CALL(astfold_expr, expr_ty, node_->v.If.test);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.If.body);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.If.orelse);
        break;
    case With_kind:
        CALL_SEQ(astfold_withitem, withitem_ty, node_->v.With.items);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.With.body);
        break;
    case AsyncWith_kind:
        CALL_SEQ(astfold_withitem, withitem_ty, node_->v.AsyncWith.items);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.AsyncWith.body);
        break;
    case Raise_kind:
        CALL_OPT(astfold_expr, expr_ty, node_->v.Raise.exc);
        CALL_OPT(astfold_expr, expr_ty, node_->v.Raise.cause);
        break;
    case Try_kind:
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.Try.body);
        CALL_SEQ(astfold_excepthandler, excepthandler_ty, node_->v.Try.handlers);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.Try.orelse);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.Try.finalbody);
        break;
    case Assert_kind:
        CALL(astfold_expr, expr_ty, node_->v.Assert.test);
        CALL_OPT(astfold_expr, expr_ty, node_->v.Assert.msg);
        break;
    case Expr_kind:
        CALL(astfold_expr, expr_ty, node_->v.Expr.value);
        break;
    default:
        break;
    }
    return 1;
}

static int
astfold_excepthandler(excepthandler_ty node_, PyArena *ctx_, int optimize_)
{
    switch (node_->kind) {
    case ExceptHandler_kind:
        CALL_OPT(astfold_expr, expr_ty, node_->v.ExceptHandler.type);
        CALL_SEQ(astfold_stmt, stmt_ty, node_->v.ExceptHandler.body);
        break;
    default:
        break;
    }
    return 1;
}

static int
astfold_withitem(withitem_ty node_, PyArena *ctx_, int optimize_)
{
    CALL(astfold_expr, expr_ty, node_->context_expr);
    CALL_OPT(astfold_expr, expr_ty, node_->optional_vars);
    return 1;
}

#undef CALL
#undef CALL_OPT
#undef CALL_SEQ
#undef CALL_INT_SEQ

int
_PyAST_Optimize(mod_ty mod, PyArena *arena, int optimize)
{
    int ret = astfold_mod(mod, arena, optimize);
    assert(ret || PyErr_Occurred());
    return ret;
}
generated by cgit v0.12 at 2025-12-29 19:40:26 (GMT)