cppcheck/test/testunusedprivfunc.cpp at master · bugdebugger/cppcheck · GitHub

History

753 lines (662 loc) · 21.6 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

* Cppcheck - A tool for static C/C++ code analysis

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

#include "tokenize.h"

#include "checkclass.h"

#include "testsuite.h"

class TestUnusedPrivateFunction : public TestFixture {

public:

TestUnusedPrivateFunction() : TestFixture("TestUnusedPrivateFunction") {

}

private:

void run() {

TEST_CASE(test1);

TEST_CASE(test2);

TEST_CASE(test3);

TEST_CASE(test4);

TEST_CASE(test5);

TEST_CASE(test6); // ticket #2602

// [ 2236547 ] False positive --style unused function, called via pointer

TEST_CASE(func_pointer1);

TEST_CASE(func_pointer2);

TEST_CASE(func_pointer3);

TEST_CASE(func_pointer4); // ticket #2807

TEST_CASE(func_pointer5); // ticket #2233

TEST_CASE(func_pointer6); // ticket #4787

TEST_CASE(ctor);

TEST_CASE(ctor2);

TEST_CASE(classInClass);

TEST_CASE(sameFunctionNames);

TEST_CASE(incompleteImplementation);

TEST_CASE(derivedClass); // skip warning for derived classes. It might be a virtual function.

TEST_CASE(friendClass);

TEST_CASE(borland1); // skip FP when using __property

TEST_CASE(borland2); // skip FP when using __published

// No false positives when there are "unused" templates that are removed in the simplified token list

TEST_CASE(template1);

// #2407 - FP when called from operator()

TEST_CASE(fp_operator);

TEST_CASE(testDoesNotIdentifyMethodAsFirstFunctionArgument); // #2480

TEST_CASE(testDoesNotIdentifyMethodAsMiddleFunctionArgument);

TEST_CASE(testDoesNotIdentifyMethodAsLastFunctionArgument);

TEST_CASE(multiFile);

TEST_CASE(unknownBaseTemplate); // ticket #2580

TEST_CASE(hierarchie_loop); // ticket 5590

TEST_CASE(staticVariable); //ticket #5566

}

void check(const char code[]) {

// Clear the error buffer..

errout.str("");

Settings settings;

settings.addEnabled("style");

// Tokenize..

Tokenizer tokenizer(&settings, this);

std::istringstream istr(code);

tokenizer.tokenize(istr, "test.cpp");

tokenizer.simplifyTokenList2();

// Check for unused private functions..

CheckClass checkClass(&tokenizer, &settings, this);

checkClass.privateFunctions();

}

void test1() {

check("class Fred\n"

"{\n"

"private:\n"

" unsigned int f();\n"

"public:\n"

" Fred();\n"

"};\n"

"\n"

"Fred::Fred()\n"

"{ }\n"

"\n"

"unsigned int Fred::f()\n"

"{ }");

ASSERT_EQUALS("[test.cpp:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

check("#file \"p.h\"\n"

"class Fred\n"

"{\n"

"private:\n"

" unsigned int f();\n"

"public:\n"

" Fred();\n"

"};\n"

"\n"

"#endfile\n"

"Fred::Fred()\n"

"{ }\n"

"\n"

"unsigned int Fred::f()\n"

"{ }");

ASSERT_EQUALS("[p.h:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

check("#file \"p.h\"\n"

"class Fred\n"

"{\n"

"private:\n"

"void f();\n"

"};\n"

"\n"

"#endfile\n"

"\n"

"void Fred::f()\n"

"{\n"

"}");

ASSERT_EQUALS("[p.h:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

// Don't warn about include files which implementation we don't see

check("#file \"p.h\"\n"

"class Fred\n"

"{\n"

"private:\n"

"void f();\n"

"void g() {}\n"

"};\n"

"\n"

"#endfile\n"

"\n"

"int main()\n"

"{\n"

"}");

ASSERT_EQUALS("", errout.str());

}

void test2() {

check("class A {\n"

"public:\n"

" A();\n"

"\n"

" void a() const\n"

" { b(); }\n"

"private:\n"

" void b( ) const\n"

" { }\n"

"};\n"

"\n"

"A::A()\n"

"{ }");

ASSERT_EQUALS("", errout.str());

}

void test3() {

check("class A {\n"

"public:\n"

" A() { }\n"

" ~A();\n"

"private:\n"

" void B() { }\n"

"};\n"

"\n"

"A::~A()\n"

"{ B(); }");

ASSERT_EQUALS("", errout.str());

}

void test4() {

check("class A {\n"

"public:\n"

" A();\n"

"private:\n"

" bool _owner;\n"

" void b() { }\n"

"};\n"

"\n"

"A::A() : _owner(false)\n"

"{ b(); }");

ASSERT_EQUALS("", errout.str());

}

void test5() {

check("class A {\n"

"private:\n"

" A() : lock(new Lock())\n"

" { }\n"

" Lock *lock;\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void test6() { // ticket #2602 segmentation fault

check("class A {\n"

" A& operator=(const A&);\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void func_pointer1() {

check("class Fred\n"

"{\n"

"private:\n"

" typedef void (*testfp)();\n"

"\n"

" testfp get()\n"

" {\n"

" return test;\n"

" }\n"

"\n"

" static void test()\n"

" { }\n"

"\n"

"public:\n"

" Fred();\n"

"};\n"

"\n"

"Fred::Fred()\n"

"{}");

ASSERT_EQUALS("[test.cpp:6]: (style) Unused private function: 'Fred::get'\n", errout.str());

}

void func_pointer2() {

check("class UnusedPrivateFunctionMemberPointer\n"

"{\n"

"public:\n"

" UnusedPrivateFunctionMemberPointer()\n"

" : mObserver(this, &UnusedPrivateFunctionMemberPointer::callback)\n"

" {}\n"

"\n"

"private:\n"

" void callback(const& unsigned) const {}\n"

"\n"

" Observer<UnusedPrivateFunctionMemberPointer, unsigned> mObserver;\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void func_pointer3() {

check("class c1\n"

"{\n"

"public:\n"

" c1()\n"

" { sigc::mem_fun(this, &c1::f1); }\n"

"\n"

"private:\n"

" void f1() const {}\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void func_pointer4() { // ticket #2807

check("class myclass {\n"

"public:\n"

" myclass();\n"

"private:\n"

" static void f();\n"

" void (*fptr)();\n"

"};\n"

"myclass::myclass() { fptr = &f; }\n"

"void myclass::f() {}");

ASSERT_EQUALS("", errout.str());

}

void func_pointer5() {

check("class A {\n"

"public:\n"

" A() { f = A::func; }\n"

" void (*f)();\n"

"private:\n"

" static void func() { }\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void func_pointer6() { // #4787

check("class Test {\n"

"private:\n"

" static void a(const char* p) { }\n"

"public:\n"

" void test(void* f = a) {\n"

" f(\"test\");\n"

" }\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void ctor() {

check("class PrivateCtor\n"

"{\n"

"private:\n"

" PrivateCtor(int threadNum) :\n"

" numOfThreads(threadNum)\n"

" {\n"

" }\n"

"\n"

" int numOfThreads;\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void ctor2() {

check("struct State {\n"

" State(double const totalWeighting= TotalWeighting()) :\n"

" totalWeighting_(totalWeighting) {}\n"

"private:\n"

" double TotalWeighting() { return 123.0; }\n" // called from constructor

"public:\n"

" double totalWeighting_;\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void classInClass() {

check("class A\n"

"{\n"

"public:\n"

"\n"

" class B\n"

" {\n"

" private:\n"

" };\n"

"private:\n"

" static void f()\n"

" { }\n"

"};");

ASSERT_EQUALS("[test.cpp:10]: (style) Unused private function: 'A::f'\n", errout.str());

check("class A\n"

"{\n"

"public:\n"

" A()\n"

" { }\n"

"\n"

"private:\n"

" void f()\n"

" { }\n"

"\n"

" class B\n"

" {\n"

" public:\n"

" B(A *a)\n"

" { a->f(); }\n"

" };\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void sameFunctionNames() {

check("class A\n"

"{\n"

"public:\n"

" void a()\n"

" {\n"

" f(1);\n"

" }\n"

"\n"

"private:\n"

" void f() { }\n"

" void f(int) { }\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void incompleteImplementation() {

// The implementation for "A::a" is missing - so don't check if

// "A::b" is used or not

check("#file \"test.h\"\n"

"class A\n"

"{\n"

"public:\n"

" A();\n"

" void a();\n"

"private:\n"

" void b();\n"

"};\n"

"#endfile\n"

"A::A() { }\n"

"void A::b() { }");

ASSERT_EQUALS("", errout.str());

}

void derivedClass() {

// skip warning in derived classes in case the base class is invisible

check("class derived : public base\n"

"{\n"

"public:\n"

" derived() : base() { }\n"

"private:\n"

" void f();\n"

"};");

ASSERT_EQUALS("", errout.str());

check("class base {\n"

"public:\n"

" virtual void foo();\n"

" void bar();\n"

"};\n"

"class derived : public base {\n"

"private:\n"

" void foo() {}\n" // Skip for overrides of virtual functions of base

" void bar() {}\n" // Don't skip if no function is overridden

"};");

ASSERT_EQUALS("[test.cpp:9]: (style) Unused private function: 'derived::bar'\n", errout.str());

check("class Base {\n"

"private:\n"

" virtual void func() = 0;\n"

"public:\n"

" void public_func() {\n"

" func();\n"

" };\n"

"};\n"

"\n"

"class Derived1: public Base {\n"

"private:\n"

" void func() {}\n"

"};\n"

"class Derived2: public Derived1 {\n"

"private:\n"

" void func() {}\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void friendClass() {

// ticket #2459 - friend class

check("class Foo {\n"

"private:\n"

" friend Bar;\n" // Unknown friend class

" void f() { }\n"

"};");

ASSERT_EQUALS("", errout.str());

check("struct Bar {\n"

" void g() { f(); }\n" // Friend class seen, but f not seen

"};\n"

"class Foo {\n"

"private:\n"

" friend Bar;\n"

" void f();\n"

"};");

ASSERT_EQUALS("", errout.str());

check("struct Bar {\n"

" void g() { f(); }\n" // Friend class seen, but f() used in it

"};\n"

"class Foo {\n"

"private:\n"

" friend Bar;\n"

" void f() { }\n"

"};");

ASSERT_EQUALS("", errout.str());

check("class Bar {\n" // Friend class seen, f() not used in it

"};\n"

"class Foo {\n"

" friend Bar;\n"

" void f() { }\n"

"};");

ASSERT_EQUALS("[test.cpp:5]: (style) Unused private function: 'Foo::f'\n", errout.str());

}

void borland1() {

// ticket #2034 - Borland C++ __property

check("class Foo {\n"

"private:\n"

" int getx() {\n"

" return 123;\n"

" }\n"

"public:\n"

" Foo() { }\n"

" __property int x = {read=getx}\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void borland2() {

// ticket #3661 - Borland C++ __published

check("class Foo {\n"

"__published:\n"

" int getx() {\n"

" return 123;\n"

" }\n"

"public:\n"

" Foo() { }\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void template1() {

// ticket #2067 - Template methods do not "use" private ones

check("class A {\n"

"public:\n"

" template <class T>\n"

" T getVal() const;\n"

"\n"

"private:\n"

" int internalGetVal() const { return 8000; }\n"

"};\n"

"\n"

"template <class T>\n"

"T A::getVal() const {\n"

" return internalGetVal();\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void fp_operator() {

// #2407 - FP when function is called from operator()

check("class Fred\n"

"{\n"

"public:\n"

" void operator()(int x) {\n"

" startListening();\n"

" }\n"

"\n"

"private:\n"

" void startListening() {\n"

" }\n"

"};");

ASSERT_EQUALS("", errout.str());

check("class Fred\n"

"{\n"

"public:\n"

" void operator()(int x) {\n"

" }\n"

"\n"

"private:\n"

" void startListening() {\n"

" }\n"

"};");

ASSERT_EQUALS("[test.cpp:8]: (style) Unused private function: 'Fred::startListening'\n", errout.str());

// #5059

check("class Fred {\n"

" void* operator new(size_t obj_size, size_t buf_size) {}\n"

"};");

TODO_ASSERT_EQUALS("[test.cpp:2]: (style) Unused private function: 'Fred::operatornew'\n", "", errout.str()); // No message for operators - we currently cannot check their usage

check("class Fred {\n"

" void* operator new(size_t obj_size, size_t buf_size) {}\n"

"public:\n"

" void* foo() { return new(size) Fred(); }\n"

"};");

ASSERT_EQUALS("", errout.str());

}

void testDoesNotIdentifyMethodAsFirstFunctionArgument() {

check("void callback(void (*func)(int), int arg)"

"{"

" (*func)(arg);"

"}"

"class MountOperation"

"{"

" static void Completed(int i);"

"public:"

" MountOperation(int i);"

"};"

"void MountOperation::Completed(int i)"

"{"

" std::cerr << i << std::endl;"

"}"

"MountOperation::MountOperation(int i)"

"{"

" callback(MountOperation::Completed, i);"

"}"

"int main(void)"

"{"

" MountOperation aExample(10);"

"}"

);

ASSERT_EQUALS("", errout.str());

}

void testDoesNotIdentifyMethodAsMiddleFunctionArgument() {

check("void callback(char, void (*func)(int), int arg)"

"{"

" (*func)(arg);"

"}"

"class MountOperation"

"{"

" static void Completed(int i);"

"public:"

" MountOperation(int i);"

"};"

"void MountOperation::Completed(int i)"

"{"

" std::cerr << i << std::endl;"

"}"

"MountOperation::MountOperation(int i)"

"{"

" callback('a', MountOperation::Completed, i);"

"}"

"int main(void)"

"{"

" MountOperation aExample(10);"

"}"

);

ASSERT_EQUALS("", errout.str());

}

void testDoesNotIdentifyMethodAsLastFunctionArgument() {

check("void callback(int arg, void (*func)(int))"

"{"

" (*func)(arg);"

"}"

"class MountOperation"

"{"

" static void Completed(int i);"

"public:"

" MountOperation(int i);"

"};"

"void MountOperation::Completed(int i)"

"{"

" std::cerr << i << std::endl;"

"}"

"MountOperation::MountOperation(int i)"

"{"

" callback(i, MountOperation::Completed);"

"}"

"int main(void)"

"{"

" MountOperation aExample(10);"

"}"

);

ASSERT_EQUALS("", errout.str());

}

void multiFile() { // ticket #2567

check("#file \"test.h\"\n"

"struct Fred\n"

"{\n"

" Fred()\n"

" {\n"

" Init();\n"

" }\n"

"private:\n"

" void Init();\n"

"};\n"

"#endfile\n"

"void Fred::Init()\n"

"{\n"

"}");

ASSERT_EQUALS("", errout.str());

}

void unknownBaseTemplate() { // ticket #2580

check("class Bla : public Base2<Base> {\n"

"public:\n"

" Bla() {}\n"

"private:\n"

" virtual void F() const;\n"

"};\n"

"void Bla::F() const { }");

ASSERT_EQUALS("", errout.str());

}

void hierarchie_loop() {

check("class InfiniteB : InfiniteA {\n"

" class D {\n"

" };\n"

"};\n"

"namespace N {\n"

" class InfiniteA : InfiniteB {\n"

" };\n"

"}\n"

"class InfiniteA : InfiniteB {\n"

" void foo();\n"

"};\n"

"void InfiniteA::foo() {\n"

" C a;\n"

"}");

ASSERT_EQUALS("[test.cpp:10]: (style) Unused private function: 'InfiniteA::foo'\n", errout.str());

}

void staticVariable() {

check("class Foo {\n"

" static int i;\n"

" static int F() const { return 1; }\n"

"};\n"

"int Foo::i = Foo::F();");

ASSERT_EQUALS("", errout.str());

check("class Foo {\n"

" static int i;\n"

" int F() const { return 1; }\n"

"};\n"

"Foo f;\n"

"int Foo::i = f.F();");

ASSERT_EQUALS("", errout.str());

check("class Foo {\n"

" static int i;\n"

" static int F() const { return 1; }\n"

"};\n"

"int Foo::i = sth();"

"int i = F();");

ASSERT_EQUALS("[test.cpp:3]: (style) Unused private function: 'Foo::F'\n", errout.str());

}

};

REGISTER_TEST(TestUnusedPrivateFunction)

cppcheck/test/testunusedprivfunc.cpp at master · bugdebugger/cppcheck · GitHub

Expand file tree

Breadcrumbs

testunusedprivfunc.cpp

Latest commit

History

Breadcrumbs

testunusedprivfunc.cpp

File metadata and controls