~ubuntu-branches/ubuntu/trusty/monodevelop/trusty-proposed

if (((status & Status.HAS_OFFSET) == 0) && (ModFlags & (Modifiers.STATIC | Modifiers.BACKING_FIELD)) == 0 && Parent.PartialContainer.HasExplicitLayout) {

249

Report.Error (625, Location, "`{0}': Instance field types marked with StructLayout(LayoutKind.Explicit) must have a FieldOffset attribute", GetSignatureForError ());

250

}

251

252

ConstraintChecker.Check (this, member_type, type_expr.Location);

253

254

base.Emit ();

255

}

256

257

public static void Error_VariableOfStaticClass (Location loc, string variable_name, TypeSpec static_class, Report Report)

258

{

259

Report.SymbolRelatedToPreviousError (static_class);

260

Report.Error (723, loc, "`{0}': cannot declare variables of static types",

261

variable_name);

262

}

263

264

protected override bool VerifyClsCompliance ()

265

{

266

if (!base.VerifyClsCompliance ())

267

return false;

268

269

if (!MemberType.IsCLSCompliant () || this is FixedField) {

270

Report.Warning (3003, 1, Location, "Type of `{0}' is not CLS-compliant",

271

GetSignatureForError ());

272

}

273

return true;

274

}

275

}

276

277

278

// Field specification

279

280

public class FieldSpec : MemberSpec, IInterfaceMemberSpec

281

{

282

FieldInfo metaInfo;

283

TypeSpec memberType;

284

285

public FieldSpec (TypeSpec declaringType, IMemberDefinition definition, TypeSpec memberType, FieldInfo info, Modifiers modifiers)

286

: base (MemberKind.Field, declaringType, definition, modifiers)

287

{

288

this.metaInfo = info;

289

this.memberType = memberType;

290

}

291

292

#region Properties

293

294

public bool IsReadOnly {

295

get {

296

return (Modifiers & Modifiers.READONLY) != 0;

297

}

298

}

299

300

public TypeSpec MemberType {

301

get {

302

return memberType;

303

}

304

}

305

306

#endregion

307

308

public FieldInfo GetMetaInfo ()

309

{

310

if ((state & StateFlags.PendingMetaInflate) != 0) {

311

var decl_meta = DeclaringType.GetMetaInfo ();

312

if (DeclaringType.IsTypeBuilder) {

313

metaInfo = TypeBuilder.GetField (decl_meta, metaInfo);

314

} else {

315

var orig_token = metaInfo.MetadataToken;

316

metaInfo = decl_meta.GetField (Name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);

317

if (metaInfo.MetadataToken != orig_token)

318

throw new NotImplementedException ("Resolved to wrong meta token");

319

320

// What a stupid API, does not work because field handle is imported

321

// metaInfo = FieldInfo.GetFieldFromHandle (metaInfo.FieldHandle, DeclaringType.MetaInfo.TypeHandle);

322

}

323

324

state &= ~StateFlags.PendingMetaInflate;

325

}

326

327

return metaInfo;

328

}

329

330

public override MemberSpec InflateMember (TypeParameterInflator inflator)

331

{

332

var fs = (FieldSpec) base.InflateMember (inflator);

333

fs.memberType = inflator.Inflate (memberType);

334

return fs;

335

}

336

337

public FieldSpec Mutate (TypeParameterMutator mutator)

338

{

339

var decl = DeclaringType;

340

if (DeclaringType.IsGenericOrParentIsGeneric)

341

decl = mutator.Mutate (decl);

342

343

if (decl == DeclaringType)

344

return this;

345

346

var fs = (FieldSpec) MemberwiseClone ();

347

fs.declaringType = decl;

348

fs.state |= StateFlags.PendingMetaInflate;

349

350

// Gets back FieldInfo in case of metaInfo was inflated

351

fs.metaInfo = MemberCache.GetMember (TypeParameterMutator.GetMemberDeclaringType (DeclaringType), this).metaInfo;

352

return fs;

353

}

354

355

public override List<TypeSpec> ResolveMissingDependencies ()

356

{

357

return memberType.ResolveMissingDependencies ();

358

}

359

}

360

361

/// <summary>

362

/// Fixed buffer implementation

363

/// </summary>

364

public class FixedField : FieldBase

365

{

366

public const string FixedElementName = "FixedElementField";

367

static int GlobalCounter = 0;

368

369

TypeBuilder fixed_buffer_type;

370

371

const Modifiers AllowedModifiers =

372

Modifiers.NEW |

373

Modifiers.PUBLIC |

374

Modifiers.PROTECTED |

375

Modifiers.INTERNAL |

376

Modifiers.PRIVATE |

377

Modifiers.UNSAFE;

378

379

public FixedField (TypeDefinition parent, FullNamedExpression type, Modifiers mod, MemberName name, Attributes attrs)

380

: base (parent, type, mod, AllowedModifiers, name, attrs)

381

{

382

}

383

384

#region Properties

385

386

387

// Explicit struct layout set by parent

388

389

public CharSet? CharSet {

390

get; set;

391

}

392

393

#endregion

394

395

public override Constant ConvertInitializer (ResolveContext rc, Constant expr)

396

{

397

return expr.ImplicitConversionRequired (rc, rc.BuiltinTypes.Int, Location);

398

}

399

400

public override bool Define ()

401

{

402

if (!base.Define ())

403

return false;

404

405

if (!BuiltinTypeSpec.IsPrimitiveType (MemberType)) {

406

Report.Error (1663, Location,

407

"`{0}': Fixed size buffers type must be one of the following: bool, byte, short, int, long, char, sbyte, ushort, uint, ulong, float or double",

408

GetSignatureForError ());

409

} else if (declarators != null) {

410

var t = new TypeExpression (MemberType, TypeExpression.Location);

411

foreach (var d in declarators) {

412

var f = new FixedField (Parent, t, ModFlags, new MemberName (d.Name.Value, d.Name.Location), OptAttributes);

413

f.initializer = d.Initializer;

414

((ConstInitializer) f.initializer).Name = d.Name.Value;

415

f.Define ();

416

Parent.PartialContainer.Members.Add (f);

417

}

418

}

419

420

// Create nested fixed buffer container

421

string name = String.Format ("<{0}>__FixedBuffer{1}", Name, GlobalCounter++);

422

fixed_buffer_type = Parent.TypeBuilder.DefineNestedType (name,

423

TypeAttributes.NestedPublic | TypeAttributes.Sealed | TypeAttributes.BeforeFieldInit,

424

Compiler.BuiltinTypes.ValueType.GetMetaInfo ());

425

426

var ffield = fixed_buffer_type.DefineField (FixedElementName, MemberType.GetMetaInfo (), FieldAttributes.Public);

427

428

FieldBuilder = Parent.TypeBuilder.DefineField (Name, fixed_buffer_type, ModifiersExtensions.FieldAttr (ModFlags));

429

430

var element_spec = new FieldSpec (null, this, MemberType, ffield, ModFlags);

431

spec = new FixedFieldSpec (Module, Parent.Definition, this, FieldBuilder, element_spec, ModFlags);

432

433

Parent.MemberCache.AddMember (spec);

434

return true;

435

}

436

437

protected override void DoMemberTypeIndependentChecks ()

438

{

439

base.DoMemberTypeIndependentChecks ();

440

441

if (!IsUnsafe)

442

Expression.UnsafeError (Report, Location);

443

444

if (Parent.PartialContainer.Kind != MemberKind.Struct) {

445

Report.Error (1642, Location, "`{0}': Fixed size buffer fields may only be members of structs",

446

GetSignatureForError ());

447

}

448

}

449

450

public override void Accept (StructuralVisitor visitor)

451

{

452

visitor.Visit (this);

453

}

454

455

public override void Emit()

456

{

457

ResolveContext rc = new ResolveContext (this);

458

IntConstant buffer_size_const = initializer.Resolve (rc) as IntConstant;

459

if (buffer_size_const == null)

460

return;

461

462

int buffer_size = buffer_size_const.Value;

463

464

if (buffer_size <= 0) {

465

Report.Error (1665, Location, "`{0}': Fixed size buffers must have a length greater than zero", GetSignatureForError ());

466

return;

467

}

468

469

EmitFieldSize (buffer_size);

470

471

#if STATIC

472

if (Module.HasDefaultCharSet)

473

fixed_buffer_type.__SetAttributes (fixed_buffer_type.Attributes | Module.DefaultCharSetType);

474

#endif

475

476

Module.PredefinedAttributes.UnsafeValueType.EmitAttribute (fixed_buffer_type);

477

Module.PredefinedAttributes.CompilerGenerated.EmitAttribute (fixed_buffer_type);

478

fixed_buffer_type.CreateType ();

479

480

base.Emit ();

481

}

482

483

void EmitFieldSize (int buffer_size)

484

{

485

int type_size = BuiltinTypeSpec.GetSize (MemberType);

486

487

if (buffer_size > int.MaxValue / type_size) {

488

Report.Error (1664, Location, "Fixed size buffer `{0}' of length `{1}' and type `{2}' exceeded 2^31 limit",

489

GetSignatureForError (), buffer_size.ToString (), TypeManager.CSharpName (MemberType));

490

return;

491

}

492

493

AttributeEncoder encoder;

494

495

var ctor = Module.PredefinedMembers.StructLayoutAttributeCtor.Resolve (Location);

496

if (ctor == null)

497

return;

498

499

var field_size = Module.PredefinedMembers.StructLayoutSize.Resolve (Location);

500

var field_charset = Module.PredefinedMembers.StructLayoutCharSet.Resolve (Location);

501

if (field_size == null || field_charset == null)

502

return;

503

504

var char_set = CharSet ?? Module.DefaultCharSet ?? 0;

505

506

encoder = new AttributeEncoder ();

507

encoder.Encode ((short)LayoutKind.Sequential);

508

encoder.EncodeNamedArguments (

509

new [] { field_size, field_charset },

510

new Constant [] {

511

new IntConstant (Compiler.BuiltinTypes, buffer_size * type_size, Location),

512

new IntConstant (Compiler.BuiltinTypes, (int) char_set, Location)

513

}

514

);

515

516

fixed_buffer_type.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());

517

518

519

// Don't emit FixedBufferAttribute attribute for private types

520

521

if ((ModFlags & Modifiers.PRIVATE) != 0)

522

return;

523

524

ctor = Module.PredefinedMembers.FixedBufferAttributeCtor.Resolve (Location);

525

if (ctor == null)

526

return;

527

528

encoder = new AttributeEncoder ();

529

encoder.EncodeTypeName (MemberType);

530

encoder.Encode (buffer_size);

531

encoder.EncodeEmptyNamedArguments ();

532

533

FieldBuilder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());

534

}

535

}

536

537

class FixedFieldSpec : FieldSpec

538

{

539

readonly FieldSpec element;

540

541

public FixedFieldSpec (ModuleContainer module, TypeSpec declaringType, IMemberDefinition definition, FieldInfo info, FieldSpec element, Modifiers modifiers)

542

: base (declaringType, definition, PointerContainer.MakeType (module, element.MemberType), info, modifiers)

543

{

544

this.element = element;

545

546

// It's never CLS-Compliant

547

state &= ~StateFlags.CLSCompliant_Undetected;

548

}

549

550

public FieldSpec Element {

551

get {

552

return element;

553

}

554

}

555

556

public TypeSpec ElementType {

557

get {

558

return element.MemberType;

559

}

560

}

561

}

562

563

564

// The Field class is used to represents class/struct fields during parsing.

565

566

public class Field : FieldBase {

567

// <summary>

568

// Modifiers allowed in a class declaration

569

// </summary>

570

const Modifiers AllowedModifiers =

571

Modifiers.NEW |

572

Modifiers.PUBLIC |

573

Modifiers.PROTECTED |

574

Modifiers.INTERNAL |

575

Modifiers.PRIVATE |

576

Modifiers.STATIC |

577

Modifiers.VOLATILE |

578

Modifiers.UNSAFE |

579

Modifiers.READONLY;

580

581

public Field (TypeDefinition parent, FullNamedExpression type, Modifiers mod, MemberName name, Attributes attrs)

582

: base (parent, type, mod, AllowedModifiers, name, attrs)

583

{

584

}

585

586

bool CanBeVolatile ()

587

{

588

switch (MemberType.BuiltinType) {

589

case BuiltinTypeSpec.Type.Bool:

590

case BuiltinTypeSpec.Type.Char:

591

case BuiltinTypeSpec.Type.SByte:

592

case BuiltinTypeSpec.Type.Byte:

593

case BuiltinTypeSpec.Type.Short:

594

case BuiltinTypeSpec.Type.UShort:

595

case BuiltinTypeSpec.Type.Int:

596

case BuiltinTypeSpec.Type.UInt:

597

case BuiltinTypeSpec.Type.Float:

598

case BuiltinTypeSpec.Type.UIntPtr:

599

case BuiltinTypeSpec.Type.IntPtr:

600

return true;

601

}

602

603

if (TypeSpec.IsReferenceType (MemberType))

604

return true;

605

606

if (MemberType.IsEnum)

607

return true;

608

609

return false;

610

}

611

612

public override void Accept (StructuralVisitor visitor)

613

{

614

visitor.Visit (this);

615

}

616

617

public override bool Define ()

618

{

619

if (!base.Define ())

620

return false;

621

622

MetaType[] required_modifier = null;

623

if ((ModFlags & Modifiers.VOLATILE) != 0) {

624

var mod = Module.PredefinedTypes.IsVolatile.Resolve ();

625

if (mod != null)

626

required_modifier = new MetaType[] { mod.GetMetaInfo () };

627

}

628

629

FieldBuilder = Parent.TypeBuilder.DefineField (

630

Name, member_type.GetMetaInfo (), required_modifier, null, ModifiersExtensions.FieldAttr (ModFlags));

631

632

spec = new FieldSpec (Parent.Definition, this, MemberType, FieldBuilder, ModFlags);

633

634

635

// Don't cache inaccessible fields except for struct where we

636

// need them for definitive assignment checks

637

638

if ((ModFlags & Modifiers.BACKING_FIELD) == 0 || Parent.Kind == MemberKind.Struct) {

639

Parent.MemberCache.AddMember (spec);

640

}

641

642

if (initializer != null) {

643

Parent.RegisterFieldForInitialization (this, new FieldInitializer (this, initializer, TypeExpression.Location));

644

}

645

646

if (declarators != null) {

647

foreach (var d in declarators) {

648

var t = new TypeExpression (MemberType, d.Name.Location);

649

var f = new Field (Parent, t, ModFlags, new MemberName (d.Name.Value, d.Name.Location), OptAttributes);

650

if (d.Initializer != null)

651

f.initializer = d.Initializer;

652

653

f.Define ();

654

Parent.PartialContainer.Members.Add (f);

655

}

656

}

657

658

return true;

659

}

660

661

protected override void DoMemberTypeDependentChecks ()

662

{

663

if ((ModFlags & Modifiers.BACKING_FIELD) != 0)

664

return;

665

666

base.DoMemberTypeDependentChecks ();

667

668

if ((ModFlags & Modifiers.VOLATILE) != 0) {

669

if (!CanBeVolatile ()) {

670

Report.Error (677, Location, "`{0}': A volatile field cannot be of the type `{1}'",

671

GetSignatureForError (), TypeManager.CSharpName (MemberType));

672

}

673

674

if ((ModFlags & Modifiers.READONLY) != 0) {

675

Report.Error (678, Location, "`{0}': A field cannot be both volatile and readonly",

676

GetSignatureForError ());

677

}

678

}

679

}

680

681

protected override bool VerifyClsCompliance ()

682

{

683

if (!base.VerifyClsCompliance ())

684

return false;

685

686

if ((ModFlags & Modifiers.VOLATILE) != 0) {

687

Report.Warning (3026, 1, Location, "CLS-compliant field `{0}' cannot be volatile", GetSignatureForError ());

688

}

689

690

return true;

691

}

692

}

693

}

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