Viewing: github-redirect.dependabot.com

Repository navigation

More items

Blame

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

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

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

#include "Python.h"

#include "pycore_ast.h" // expr_ty

#include "pycore_pystate.h" // _PyInterpreterState_GET()

#include "pycore_runtime.h" // _Py_ID()

#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)

_Py_DECLARE_STR(dbl_open_br, "{{");

_Py_DECLARE_STR(dbl_close_br, "}}");

/* 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))

{

_Py_DECLARE_STR(str_replace_inf, "1e309"); // evaluates to inf

PyObject *new_repr = PyUnicode_Replace(

repr,

&_Py_ID(inf),

&_Py_STR(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, _Py_LATIN1_CHR('{'),

&_Py_STR(dbl_open_br), -1);

if (!temp) {

return NULL;

}

result = PyUnicode_Replace(temp, _Py_LATIN1_CHR('}'),

&_Py_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, _Py_LATIN1_CHR('{'), 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);

APPEND_STR("[");

APPEND_EXPR(e->v.Subscript.slice, PR_TUPLE);

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 PyObject *

expr_as_unicode(expr_ty e, int level)

{

_PyUnicodeWriter writer;

_PyUnicodeWriter_Init(&writer);

writer.min_length = 256;

writer.overallocate = 1;

if (-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);

}

Terms
Privacy
Security
Status
Community
Docs
Contact
Manage cookies
Do not share my personal information

Navigation Menu

Repository navigation

Files

ast_unparse.c

ast_unparse.c

Navigation Menu

Repository navigation

FilesExpand file tree

Breadcrumbs

ast_unparse.c

Latest commit

History

Breadcrumbs

ast_unparse.c

File metadata and controls

Footer

Footer navigation

Files