lpython/src/lpython/parser/tokenizer.re at main · Dheerajjha451/lpython · GitHub

History

839 lines (767 loc) · 28.3 KB

Raw

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

#include <limits>

#include <iostream>

#include <lpython/parser/parser_exception.h>

#include <lpython/parser/tokenizer.h>

#include <lpython/parser/parser.tab.hh>

#include <libasr/bigint.h>

namespace LCompilers::LPython {

template<int base>

bool adddgt(uint64_t &u, uint64_t d)

{

if (u > (std::numeric_limits<uint64_t>::max() - d) / base) {

return false;

}

u = u * base + d;

return true;

}

bool lex_oct(const unsigned char *s, const unsigned char *e, uint64_t &u)

{

for (u = 0, ++s; s < e; ++s) {

if (!adddgt<8>(u, *s - 0x30u)) {

return false;

}

return true;

}

bool lex_dec(const unsigned char *s, const unsigned char *e, uint64_t &u)

{

for (u = 0; s < e; ++s) {

if (*s == '_') continue;

if (!adddgt<10>(u, *s - 0x30u)) {

return false;

}

return true;

}

void lex_dec_int_large(Allocator &al, const unsigned char *s,

const unsigned char *e, BigInt::BigInt &u)

{

uint64_t ui;

if (lex_dec(s, e, ui)) {

if (ui <= BigInt::MAX_SMALL_INT) {

u.from_smallint(ui);

return;

}

// TODO: remove underscore from large ints

const unsigned char *start = s;

Str num;

num.p = (char*)start;

num.n = e-start;

u.from_largeint(al, num);

}

const std::string remove_underscore(std::string s) {

s.erase(remove(s.begin(), s.end(), '_'), s.end());

return s;

}

uint64_t get_value(char *s, int base, const Location &loc) {

std::string str(remove_underscore(s));

uint64_t n;

try {

n = std::stoull(str, nullptr, base);

} catch (const std::out_of_range &e) {

throw parser_local::TokenizerError(

"Integer too large to convert", {loc});

}

return n;

}

// Converts integer (Dec, Hex, Bin, Oct) from a string to BigInt `u`

// s ... the start of the integer

// e ... the character after the end

void lex_int(Allocator &al, const unsigned char *s,

const unsigned char *e, BigInt::BigInt &u, const Location &loc)

{

if (std::tolower(s[1]) == 'x') {

// Hex

s = s + 2;

uint64_t n = get_value((char*)s, 16, loc);

u.from_smallint(n);

} else if (std::tolower(s[1]) == 'b') {

// Bin

s = s + 2;

uint64_t n = get_value((char*)s, 2, loc);

u.from_smallint(n);

} else if ((std::tolower(s[1]) == 'o')) {

// Oct

s = s + 2;

uint64_t n = get_value((char*)s, 8, loc);

u.from_smallint(n);

} else {

lex_dec_int_large(al, s, e, u);

}

return;

}

// Tokenizes imag num of value 123j into `u` and `suffix`

// s ... the start of the integer

// e ... the character after the end

void lex_imag(Allocator &al, const unsigned char *s,

const unsigned char *e, BigInt::BigInt &u, Str &suffix)

{

const unsigned char *start = s;

for (; s < e; ++s) {

if ((*s == 'j') | (*s == 'J')) {

suffix.p = (char*) s; // `j`

suffix.n = 1;

Str num;

num.p = (char*)start;

num.n = s-start;

u.from_largeint(al, num);

return;

}

void Tokenizer::set_string(const std::string &str, uint32_t prev_loc_)

{

// The input string must be NULL terminated, otherwise the tokenizer will

// not detect the end of string. After C++11, the std::string is guaranteed

// to end with \0, but we check this here just in case.

LCOMPILERS_ASSERT(str[str.size()] == '\0');

cur = (unsigned char *)(&str[0]);

string_start = cur;

prev_loc = prev_loc_;

cur_line = cur;

line_num = 1;

}

void Tokenizer::record_paren(Location &loc, char c) {

switch (c) {

case '(':

case '[':

case '{':

if(parenlevel >= MAX_PAREN_LEVEL) {

throw parser_local::TokenizerError(

"Too many nested parentheses", {loc});

}

paren_stack[parenlevel] = c;

parenlevel++;

break;

case ')':

case ']':

case '}':

if(parenlevel < 1) {

throw parser_local::TokenizerError(

"Parenthesis unexpected", {loc});

}

parenlevel--;

char prev_paren = paren_stack[parenlevel];

if(!((prev_paren == '(' && c == ')') ||

(prev_paren == '[' && c == ']') ||

(prev_paren == '{' && c == '}'))) {

throw parser_local::TokenizerError(

"Parentheses does not match", {loc});

}

break;

}

return;

}

#define KW(x) token(yylval.string); RET(KW_##x);

#define RET(x) token_loc(loc); last_token=yytokentype::x; return yytokentype::x;

int Tokenizer::lex(Allocator &al, YYSTYPE &yylval, Location &loc, diag::Diagnostics &/*diagnostics*/)

{

if(dedent == 1) {

// Removes the indent completely i.e., to level 0

if(!indent_length.empty()) {

indent_length.pop_back();

return yytokentype::TK_DEDENT;

} else {

dedent = 0;

}

} else if(dedent == 2) {

// Reduce the indent to `last_indent_length`

if((long int)indent_length.back() != last_indent_length) {

indent_length.pop_back();

loc.first = loc.last;

return yytokentype::TK_DEDENT;

} else {

dedent = 0;

}

for (;;) {

tok = cur;

Re2c has excellent documentation at:

https://re2c.org/manual/manual_c.html

The first paragraph there explains the basics:

* If multiple rules match, the longest match takes precedence

* If multiple rules match the same string, the earlier rule takes

precedence

* Default rule `*` should always be defined, it has the lowest priority

regardless of its place and matches any code unit

* We use the "Sentinel character" method for end of input:

* The end of the input text is denoted with a null character \x00

* Thus the null character cannot be part of the input otherwise

* There is one rule to match \x00 to end the parser

* No other rule is allowed to match \x00, otherwise the re2c block

would parse past the end of the string and segfaults

* A special case of the previous point are negated character

ranges, such as [^"\x00], where one must include \x00 in it to

ensure this rule does not match \x00 (all other rules simply do

not mention \x00)

* See the "Handling the end of input" section in the re2c

documentation for more info

The re2c block interacts with the rest of the code via just one pointer

variable `cur`. On entering the re2c block, the `cur` variable must

point to the first character of the token to be tokenized by the block.

The re2c block below then executes on its own until a rule is matched:

the action in {} is then executed. In that action `cur` points to the

first character of the next token.

Before the re2c block we save the current `cur` into `tok`, so that we

can use `tok` and `cur` in the action in {} to extract the token that

corresponds to the rule that got matched:

* `tok` points to the first character of the token

* `cur-1` points to the last character of the token

* `cur` points to the first character of the next token

* `cur-tok` is the length of the token

In the action, we do one of:

* call `continue` which executes another cycle in the for loop (which

will parse the next token); we use this to skip a token

* call `return` which returns from this function; we return a token

* throw an exception (terminates the tokenizer)

In the first two cases, `cur` points to first character of the next

token, which becomes `tok` at the next iteration of the loop (either

right away after `continue` or after the `lex` function is called again

after `return`).

See the manual for more details.

// These two variables are needed by the re2c block below internally,

// initialization is not needed. One can think of them as local

// variables of the re2c block.

unsigned char *mar; //, *ctxmar;

/*!re2c

re2c:define:YYCURSOR = cur;

re2c:define:YYMARKER = mar;

// re2c:define:YYCTXMARKER = ctxmar;

re2c:yyfill:enable = 0;

re2c:define:YYCTYPE = "unsigned char";

end = "\x00";

whitespace = [ \t\v]+;

newline = "\n" | "\r\n";

digit = [0-9];

int_oct = "0"[oO]([0-7] | "_" [0-7])+;

int_bin = "0"[bB]([01] | "_" [01])+;

int_hex = "0"[xX]([0-9a-fA-F] | "_" [0-9a-fA-F])+;

digits = digit+ (digit | "_" digit)*;

char = [^\x00-\x7F]|[a-zA-Z_];

name = char (char | digit)*;

significand = (digits "." digits?) | ("." digits);

exp = [eE][-+]? digits;

integer = digits | int_oct | int_bin | int_hex;

real = (significand exp?) | (digits exp);

imag_number = (real | digits)[jJ];

string1 = '"' ('\\'[^\x00] | [^"\x00\n\\])* '"';

string2 = "'" ("\\"[^\x00] | [^'\x00\n\\])* "'";

string3 = '"""' ( '\\'[^\x00]

| ('"' | '"' '\\'+ '"' | '"' '\\'+) [^"\x00\\]

| ('""' | '""' '\\'+) [^"\x00\\]

| [^"\x00\\] )*

'"""';

string4 = "'''" ( "\\"[^\x00]

| ("'" | "'" "\\"+ "'" | "'" "\\"+) [^'\x00\\]

| ("''" | "''" "\\"+) [^'\x00\\]

| [^'\x00\\] )*

"'''";

type_ignore = "#" whitespace? "type:" whitespace? "ignore" [^\n\x00]*;

type_comment = "#" whitespace? "type:" whitespace? [^\n\x00]*;

comment = "#" [^\n\x00]*;

// docstring = newline whitespace? string1 | string2;

ws_comment = whitespace? comment? newline;

* { token_loc(loc);

std::string t = token();

throw parser_local::TokenizerError(diag::Diagnostic(

"Token '" + t + "' is not recognized",

diag::Level::Error, diag::Stage::Tokenizer, {

diag::Label("token not recognized", {loc})

})

);

}

end {

token_loc(loc);

if(parenlevel) {

throw parser_local::TokenizerError(

"Parentheses was never closed", {loc});

}

RET(END_OF_FILE);

}

whitespace {

if(cur[0] == '#') { continue; }

if(last_token == yytokentype::TK_NEWLINE && cur[0] == '\n') {

continue;

}

if (indent) {

indent = false;

if (cur[0] != ' ' && cur[0] != '\t'

&& last_indent_length < cur-tok) {

if (last_indent_length == 0) {

last_indent_type = tok[0];

}

if (last_indent_type == tok[0]) {

indent_length.push_back(cur-tok);

last_indent_length = cur-tok;

RET(TK_INDENT);

} else {

token_loc(loc);

throw parser_local::TokenizerError(

"Indentation should be of the same type "

"(either tabs or spaces)", {loc});

}

} else {

token_loc(loc);

throw parser_local::TokenizerError(

"Expected an indented block.", {loc});

}

} else {

if(last_token == yytokentype::TK_NEWLINE

&& cur[0] != ' ' && cur[0] != '\t') {

if (last_indent_type == tok[0]) {

if (last_indent_length > cur-tok) {

last_indent_length = cur-tok;

dedent = 2;

if (!indent_length.empty()) {

indent_length.pop_back();

}

RET(TK_DEDENT);

}

} else {

token_loc(loc);

throw parser_local::TokenizerError(

"Indentation should be of the same type "

"(either tabs or spaces)", {loc});

}

continue;

}

// Keywords

"as" { KW(AS) }

"assert" { KW(ASSERT) }

"async" { KW(ASYNC) }

"await" { KW(AWAIT) }

"break" { KW(BREAK) }

"class" { KW(CLASS) }

"continue" { KW(CONTINUE) }

"def" { KW(DEF) }

"del" { KW(DEL) }

"elif" { KW(ELIF) }

"else" { KW(ELSE) }

"except" { KW(EXCEPT) }

"finally" { KW(FINALLY) }

"for" { KW(FOR) }

"from" { KW(FROM) }

"global" { KW(GLOBAL) }

"if" { KW(IF) }

"import" { KW(IMPORT) }

"in" { KW(IN) }

"is" { KW(IS) }

"lambda" { KW(LAMBDA) }

"None" { KW(NONE) }

"nonlocal" { KW(NONLOCAL) }

"pass" { KW(PASS) }

"raise" { KW(RAISE) }

"return" { KW(RETURN) }

"try" { KW(TRY) }

"while" { KW(WHILE) }

"with" { KW(WITH) }

"yield" { KW(YIELD) }

"yield" whitespace "from" whitespace { KW(YIELD_FROM) }

// Soft Keywords

"match" / [^:\n\x00] {

if ((last_token == -1

|| last_token == yytokentype::TK_DEDENT

|| last_token == yytokentype::TK_INDENT

|| last_token == yytokentype::TK_NEWLINE)

&& parenlevel == 0) {

bool is_match_keyword = false;

lex_match_or_case(loc, cur, is_match_keyword);

if (is_match_keyword) {

KW(MATCH);

} else {

token(yylval.string);

RET(TK_NAME);

}

} else {

token(yylval.string);

RET(TK_NAME);

}

"case" / [^:\n\x00] {

if ((last_token == yytokentype::TK_INDENT

|| last_token == yytokentype::TK_DEDENT)

&& parenlevel == 0) {

bool is_case_keyword = false;

lex_match_or_case(loc, cur, is_case_keyword);

if (is_case_keyword) {

KW(CASE);

} else {

token(yylval.string);

RET(TK_NAME);

}

} else {

token(yylval.string);

RET(TK_NAME);

}

// Tokens

newline {

if(parenlevel) { continue; }

if(cur[0] == '#') { RET(TK_NEWLINE); }

if (last_token == yytokentype::TK_COLON

|| colon_actual_last_token) {

colon_actual_last_token = false;

indent = true;

} else if (cur[0] != ' ' && cur[0] != '\t' && cur[0] != '\n'

&& last_indent_length >= cur-tok) {

last_indent_length = 0;

dedent = 1;

}

RET(TK_NEWLINE);

}

"\\" newline { continue; }

// Single character symbols

"(" { token_loc(loc); record_paren(loc, '('); RET(TK_LPAREN) }

"[" { token_loc(loc); record_paren(loc, '['); RET(TK_LBRACKET) }

"{" { token_loc(loc); record_paren(loc, '{'); RET(TK_LBRACE) }

")" { token_loc(loc); record_paren(loc, ')'); RET(TK_RPAREN) }

"]" { token_loc(loc); record_paren(loc, ']'); RET(TK_RBRACKET) }

"}" { token_loc(loc); record_paren(loc, '}'); RET(TK_RBRACE) }

"+" { RET(TK_PLUS) }

"-" { RET(TK_MINUS) }

"=" { RET(TK_EQUAL) }

":" {

if(cur[0] == '\n' && !parenlevel){

colon_actual_last_token = true;

}

RET(TK_COLON);

}

";" { RET(TK_SEMICOLON) }

"/" { RET(TK_SLASH) }

"%" { RET(TK_PERCENT) }

"," { RET(TK_COMMA) }

"*" { RET(TK_STAR) }

"|" { RET(TK_VBAR) }

"&" { RET(TK_AMPERSAND) }

"." { RET(TK_DOT) }

"~" { RET(TK_TILDE) }

"^" { RET(TK_CARET) }

"@" { RET(TK_AT) }

// Multiple character symbols

">>" { RET(TK_RIGHTSHIFT) }

"<<" { RET(TK_LEFTSHIFT) }

"**" { RET(TK_POW) }

"//" { RET(TK_FLOOR_DIV) }

"+=" { RET(TK_PLUS_EQUAL) }

"-=" { RET(TK_MIN_EQUAL) }

"*=" { RET(TK_STAR_EQUAL) }

"/=" { RET(TK_SLASH_EQUAL) }

"%=" { RET(TK_PERCENT_EQUAL) }

"&=" { RET(TK_AMPER_EQUAL) }

"|=" { RET(TK_VBAR_EQUAL) }

"^=" { RET(TK_CARET_EQUAL) }

"@=" { RET(TK_ATEQUAL) }

"->" { RET(TK_RARROW) }

":=" { RET(TK_COLONEQUAL) }

"..." { RET(TK_ELLIPSIS) }

"<<=" { RET(TK_LEFTSHIFT_EQUAL) }

">>=" { RET(TK_RIGHTSHIFT_EQUAL) }

"**=" { RET(TK_POW_EQUAL) }

"//=" { RET(TK_DOUBLESLASH_EQUAL) }

// Relational operators

"==" { RET(TK_EQ) }

"!=" { RET(TK_NE) }

"<" { RET(TK_LT) }

"<=" { RET(TK_LE) }

">" { RET(TK_GT) }

">=" { RET(TK_GE) }

// Logical operators

"not" { RET(TK_NOT) }

"and" { RET(TK_AND) }

"or" { RET(TK_OR) }

"is" whitespace "not" whitespace { RET(TK_IS_NOT) }

"is" whitespace? "\\" newline whitespace? "not" whitespace { RET(TK_IS_NOT) }

"not" whitespace "in" "\\" newline { RET(TK_NOT_IN) }

"not" whitespace "in" whitespace { RET(TK_NOT_IN) }

"not" whitespace "in" newline { RET(TK_NOT_IN) }

"not" whitespace? "\\" newline whitespace? "in" "\\" newline { RET(TK_NOT_IN) }

"not" whitespace? "\\" newline whitespace? "in" whitespace { RET(TK_NOT_IN) }

// True/False

"True" { RET(TK_TRUE) }

"False" { RET(TK_FALSE) }

real {

yylval.f = std::strtod(remove_underscore(token()).c_str(), 0);

RET(TK_REAL)

}

integer {

BigInt::BigInt n;

token_loc(loc);

lex_int(al, tok, cur, n, loc);

yylval.n = n.n;

RET(TK_INTEGER)

}

imag_number {

yylval.f = std::strtod(remove_underscore(token()).c_str(), 0);

RET(TK_IMAG_NUM)

}

type_ignore {

if (last_token == yytokentype::TK_COLON && !parenlevel) {

indent = true;

}

token(yylval.string);

last_token=yytokentype::TK_NEWLINE;

return yytokentype::TK_TYPE_IGNORE;

}

type_comment {

if (last_token == yytokentype::TK_COLON && !parenlevel) {

indent = true;

}

token(yylval.string);

last_token=yytokentype::TK_NEWLINE;

return yytokentype::TK_TYPE_COMMENT;

}

comment {

if(last_token == -1) { RET(TK_COMMENT); }

if(parenlevel) { continue; }

line_num++; cur_line=cur;

token(yylval.string);

// This is commented out because

// the last character in the comment was skipped.

// yylval.string.n--;

token_loc(loc);

if (last_token == yytokentype::TK_NEWLINE) {

return yytokentype::TK_COMMENT;

} else {

if (last_token == yytokentype::TK_COLON) {

indent = true;

}

last_token=yytokentype::TK_NEWLINE;

return yytokentype::TK_EOLCOMMENT;

}

//docstring { RET(TK_DOCSTRING) }

string1 { token_str(yylval.string); RET(TK_STRING) }

string2 { token_str(yylval.string); RET(TK_STRING) }

string3 { token_str3(yylval.string); RET(TK_STRING) }

string4 { token_str3(yylval.string); RET(TK_STRING) }

name { token(yylval.string); RET(TK_NAME) }

}

void Tokenizer::lex_match_or_case(Location &loc, unsigned char *cur,

bool &is_match_or_case_keyword) {

for (;;) {

unsigned char *tok = cur;

unsigned char *mar;

/*!re2c

re2c:define:YYCURSOR = cur;

re2c:define:YYMARKER = mar;

re2c:yyfill:enable = 0;

re2c:define:YYCTYPE = "unsigned char";

* {

token_loc(loc);

std::string t = std::string((char *)tok, cur - tok);

throw parser_local::TokenizerError("Token '"

+ t + "' is not recognized in `match` statement", loc);

}

end {

token_loc(loc);

std::string t = std::string((char *)tok, cur - tok);

throw parser_local::TokenizerError(

"End of file not expected within `match` statement: '" + t

+ "'", loc);

}

"(" { record_paren(loc, '('); continue; }

"[" { record_paren(loc, '['); continue; }

"{" { record_paren(loc, '{'); continue; }

")" { record_paren(loc, ')'); continue; }

"]" { record_paren(loc, ']'); continue; }

"}" { record_paren(loc, '}'); continue; }

":" newline | ":" whitespace? comment {

if (parenlevel == 0) {

is_match_or_case_keyword = true;

return;

}

continue;

}

"\\" newline { continue; }

newline {

if (parenlevel == 0) { return; }

continue;

}

[^\x00] { continue; }

}

#define T(tk, name) case (yytokentype::tk) : return name;

std::string token2text(const int token)

{

if (0 < token && token < 256) {

char t = token;

return std::string(&t, 1);

}

switch (token) {

T(END_OF_FILE, "end of file")

T(TK_NEWLINE, "newline")

T(TK_INDENT, "indent")

T(TK_DEDENT, "dedent")

T(TK_NAME, "identifier")

T(TK_INTEGER, "integer")

T(TK_REAL, "real")

T(TK_IMAG_NUM, "imag number")

T(TK_PLUS, "+")

T(TK_MINUS, "-")

T(TK_STAR, "*")

T(TK_SLASH, "/")

T(TK_COLON, ":")

T(TK_SEMICOLON, ";")

T(TK_COMMA, ",")

T(TK_EQUAL, "=")

T(TK_LPAREN, "(")

T(TK_RPAREN, ")")

T(TK_LBRACKET, "[")

T(TK_RBRACKET, "]")

T(TK_LBRACE, "{")

T(TK_RBRACE, "}")

T(TK_PERCENT, "%")

T(TK_VBAR, "|")

T(TK_AMPERSAND, "&")

T(TK_DOT, ".")

T(TK_TILDE, "~")

T(TK_CARET, "^")

T(TK_AT, "@")

T(TK_STRING, "string")

T(TK_COMMENT, "comment")

T(TK_EOLCOMMENT, "eolcomment")

T(TK_TYPE_COMMENT, "type_comment")

T(TK_TYPE_IGNORE, "type_ignore")

T(TK_POW, "**")

T(TK_FLOOR_DIV, "//")

T(TK_RIGHTSHIFT, ">>")

T(TK_LEFTSHIFT, "<<")

T(TK_PLUS_EQUAL, "+=")

T(TK_MIN_EQUAL, "-=")

T(TK_STAR_EQUAL, "*=")

T(TK_SLASH_EQUAL, "/=")

T(TK_PERCENT_EQUAL, "%=")

T(TK_AMPER_EQUAL, "&=")

T(TK_VBAR_EQUAL, "|=")

T(TK_CARET_EQUAL, "^=")

T(TK_ATEQUAL, "@=")

T(TK_RARROW, "->")

T(TK_COLONEQUAL, ":=")

T(TK_ELLIPSIS, "...")

T(TK_LEFTSHIFT_EQUAL, "<<=")

T(TK_RIGHTSHIFT_EQUAL, ">>=")

T(TK_POW_EQUAL, "**=")

T(TK_DOUBLESLASH_EQUAL, "//=")

T(TK_EQ, "==")

T(TK_NE, "!=")

T(TK_LT, "<")

T(TK_LE, "<=")

T(TK_GT, ">")

T(TK_GE, ">=")

T(TK_NOT, "not")

T(TK_AND, "and")

T(TK_OR, "or")

T(TK_IS_NOT, "is not")

T(TK_NOT_IN, "not in")

T(TK_TRUE, "True")

T(TK_FALSE, "False")

T(KW_AS, "as")

T(KW_ASSERT, "assert")

T(KW_ASYNC, "async")

T(KW_AWAIT, "await")

T(KW_BREAK, "break")

T(KW_CLASS, "class")

T(KW_CONTINUE, "continue")

T(KW_DEF, "def")

T(KW_DEL, "del")

T(KW_ELIF, "elif")

T(KW_ELSE, "else")

T(KW_EXCEPT, "except")

T(KW_FINALLY, "finally")

T(KW_FOR, "for")

T(KW_FROM, "from")

T(KW_GLOBAL, "global")

T(KW_IF, "if")

T(KW_IMPORT, "import")

T(KW_IN, "in")

T(KW_IS, "is")

T(KW_LAMBDA, "lambda")

T(KW_NONE, "none")

T(KW_NONLOCAL, "nonlocal")

T(KW_PASS, "pass")

T(KW_RAISE, "raise")

T(KW_RETURN, "return")

T(KW_TRY, "try")

T(KW_WHILE, "while")

T(KW_WITH, "with")

T(KW_YIELD, "yield")

T(KW_YIELD_FROM, "yield from")

T(KW_MATCH, "match")

T(KW_CASE, "case")

default : {

std::cout << "TOKEN: " << token << std::endl;

throw LCompilersException("Token conversion not implemented yet.");

}

Result<std::vector<int>> tokens(Allocator &al, const std::string &input,

diag::Diagnostics &diagnostics,

std::vector<YYSTYPE> *stypes,

std::vector<Location> *locations)

{

Tokenizer t;

t.set_string(input, 0);

std::vector<int> tst;

int token = yytokentype::END_OF_FILE + 1; // Something different from EOF

while (token != yytokentype::END_OF_FILE) {

YYSTYPE y;

Location l;

try {

token = t.lex(al, y, l, diagnostics);

} catch (const parser_local::TokenizerError &e) {

diagnostics.diagnostics.push_back(e.d);

return Error();

}

tst.push_back(token);

if (stypes) stypes->push_back(y);

if (locations) locations->push_back(l);

}

return tst;

}

std::string pickle_token(int token, const YYSTYPE &yystype)

{

std::string t;

t += "(";

if (token >= yytokentype::TK_INDENT && token <= TK_FALSE) {

t += "TOKEN";

} else if (token == yytokentype::TK_NEWLINE) {

t += "NEWLINE";

t += ")";

return t;

} else if (token == yytokentype::END_OF_FILE) {

t += "EOF";

t += ")";

return t;

} else {

t += "KEYWORD";

}

t += " \"";

t += token2text(token);

t += "\"";

if (token == yytokentype::TK_NAME) {

t += " " + yystype.string.str();

} else if (token == yytokentype::TK_INTEGER) {

t += " " + BigInt::int_to_str(yystype.n);

} else if (token == yytokentype::TK_REAL) {

t += " " + std::to_string(yystype.f);

} else if (token == yytokentype::TK_IMAG_NUM) {

t += " " + std::to_string(yystype.f) + "j";

} else if (token == yytokentype::TK_STRING) {

t = t + " " + "\"" + str_escape_c(yystype.string.str()) + "\"";

} else if (token == yytokentype::TK_TYPE_COMMENT) {

t = t + " " + "\"" + yystype.string.str() + "\"";

} else if (token == yytokentype::TK_TYPE_IGNORE) {

t = t + " " + "\"" + yystype.string.str() + "\"";

}

t += ")";

return t;

}

} // namespace LCompilers::LPython

lpython/src/lpython/parser/tokenizer.re at main · Dheerajjha451/lpython · GitHub

Expand file tree

Breadcrumbs

tokenizer.re

Latest commit

History

Breadcrumbs

tokenizer.re

File metadata and controls