C# CSharp.New类代码示例

		//
		// Initializes all hoisted variables
		//
		public void EmitStoreyInstantiation (EmitContext ec, ExplicitBlock block)
		{
			// There can be only one instance variable for each storey type
			if (Instance != null)
				throw new InternalErrorException ();

			//
			// Create an instance of this storey
			//
			ResolveContext rc = new ResolveContext (ec.MemberContext);
			rc.CurrentBlock = block;

			var storey_type_expr = CreateStoreyTypeExpression (ec);
			var source = new New (storey_type_expr, null, Location).Resolve (rc);

			//
			// When the current context is async (or iterator) lift local storey
			// instantiation to the currect storey
			//
			if (ec.CurrentAnonymousMethod is StateMachineInitializer && (block.HasYield || block.HasAwait)) {
				//
				// Unfortunately, normal capture mechanism could not be used because we are
				// too late in the pipeline and standart assign cannot be used either due to
				// recursive nature of GetStoreyInstanceExpression
				//
				var field = ec.CurrentAnonymousMethod.Storey.AddCompilerGeneratedField (
					LocalVariable.GetCompilerGeneratedName (block), storey_type_expr, true);

				field.Define ();
				field.Emit ();

				var fexpr = new FieldExpr (field, Location);
				fexpr.InstanceExpression = new CompilerGeneratedThis (ec.CurrentType, Location);
				fexpr.EmitAssign (ec, source, false, false);
				Instance = fexpr;
			} else {
				var local = TemporaryVariableReference.Create (source.Type, block, Location);
				if (source.Type.IsStruct) {
					local.LocalInfo.CreateBuilder (ec);
				} else {
					local.EmitAssign (ec, source);
				}

				Instance = local;
			}

			EmitHoistedFieldsInitialization (rc, ec);

			// TODO: Implement properly
			//SymbolWriter.DefineScopeVariable (ID, Instance.Builder);
		}

			public override object Visit(New newExpression)
			{
				var result = new ObjectCreateExpression();
				var location = LocationsBag.GetLocations(newExpression);
				result.AddChild(new CSharpTokenNode(Convert(newExpression.Location), ObjectCreateExpression.NewKeywordRole), ObjectCreateExpression.NewKeywordRole);
				
				if (newExpression.TypeRequested != null)
					result.AddChild(ConvertToType(newExpression.TypeRequested), Roles.Type);
				if (location != null)
					result.AddChild(new CSharpTokenNode(Convert(location [0]), Roles.LPar), Roles.LPar);
				AddArguments(result, newExpression.Arguments);
				
				if (location != null && location.Count > 1)
					result.AddChild(new CSharpTokenNode(Convert(location [1]), Roles.RPar), Roles.RPar);
				
				return result;
			}

			public override object Visit (New newExpression)
			{
				var result = new ObjectCreateExpression ();
				
				var location = LocationsBag.GetLocations (newExpression);
				result.AddChild (new CSharpTokenNode (Convert (newExpression.Location), "new".Length), ObjectCreateExpression.Roles.Keyword);
				
				if (newExpression.NewType != null)
					result.AddChild ((INode)newExpression.NewType.Accept (this), ObjectCreateExpression.Roles.ReturnType);
				if (location != null)
					result.AddChild (new CSharpTokenNode (Convert (location[0]), 1), ObjectCreateExpression.Roles.LPar);
				AddArguments (result, location, newExpression.NewArguments);
				
				if (location != null)
					result.AddChild (new CSharpTokenNode (Convert (location[1]), 1), ObjectCreateExpression.Roles.RPar);
				
				// TODO: Collection initializer ? 
				
				return result;
			}

void case_495()
#line 3609 "cs-parser.jay"
{
		if (yyVals[0+yyTop] != null) {
			if (lang_version <= LanguageVersion.ISO_2)
				FeatureIsNotAvailable (GetLocation (yyVals[-5+yyTop]), "object initializers");
				
			yyVal = new NewInitialize ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-5+yyTop]));
		} else {
			yyVal = new New ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], GetLocation (yyVals[-5+yyTop]));
		}
		
		lbag.AddLocation (yyVal, GetLocation (yyVals[-3+yyTop]), GetLocation (yyVals[-1+yyTop]));
	  }

void case_501()
#line 3661 "cs-parser.jay"
{
		Error_SyntaxError (yyToken);
		/* It can be any of new expression, create the most common one*/
		yyVal = new New ((FullNamedExpression) yyVals[-1+yyTop], null, GetLocation (yyVals[-2+yyTop]));
	  }

		public virtual object Visit (New newExpression)
		{
			return null;
		}

		//
		// Initializes all hoisted variables
		//
		public void EmitStoreyInstantiation (EmitContext ec)
		{
			// There can be only one instance variable for each storey type
			if (Instance != null)
				throw new InternalErrorException ();

			SymbolWriter.OpenCompilerGeneratedBlock (ec);

			//
			// Create an instance of a storey
			//
			var storey_type_expr = CreateStoreyTypeExpression (ec);

			ResolveContext rc = new ResolveContext (ec.MemberContext);
			Expression e = new New (storey_type_expr, null, Location).Resolve (rc);
			e.Emit (ec);

			Instance = new LocalTemporary (storey_type_expr.Type);
			Instance.Store (ec);

			EmitHoistedFieldsInitialization (ec);

			SymbolWriter.DefineScopeVariable (ID, Instance.Builder);
			SymbolWriter.CloseCompilerGeneratedBlock (ec);
		}

		//
		// Initializes all hoisted variables
		//
		public void EmitStoreyInstantiation (EmitContext ec)
		{
			// There can be only one instance variable for each storey type
			if (Instance != null)
				throw new InternalErrorException ();

			SymbolWriter.OpenCompilerGeneratedBlock (ec.ig);

			//
			// Create an instance of storey type
			//
			Expression storey_type_expr;
			if (is_generic) {
				//
				// Use current method type parameter (MVAR) for top level storey only. All
				// nested storeys use class type parameter (VAR)
				//
				TypeParameter[] tparams = ec.CurrentAnonymousMethod != null && ec.CurrentAnonymousMethod.Storey != null ?
					ec.CurrentAnonymousMethod.Storey.TypeParameters :
					ec.CurrentTypeParameters;

				TypeArguments targs = new TypeArguments ();

				if (tparams.Length < CountTypeParameters) {
					TypeParameter[] parent_tparams = ec.MemberContext.CurrentTypeDefinition.TypeParameters;
					for (int i = 0; i < parent_tparams.Length; ++i)
						targs.Add (new TypeParameterExpr (parent_tparams[i], Location));
				}
				
				for (int i = 0; i < tparams.Length; ++i)
					targs.Add (new TypeParameterExpr (tparams[i], Location));

				storey_type_expr = new GenericTypeExpr (TypeBuilder, targs, Location);
			} else {
				storey_type_expr = new TypeExpression (TypeBuilder, Location);
			}

			ResolveContext rc = new ResolveContext (this);
			Expression e = new New (storey_type_expr, null, Location).Resolve (rc);
			e.Emit (ec);

			Instance = new LocalTemporary (storey_type_expr.Type);
			Instance.Store (ec);

			EmitHoistedFieldsInitialization (ec);

			SymbolWriter.DefineScopeVariable (ID, Instance.Builder);
			SymbolWriter.CloseCompilerGeneratedBlock (ec.ig);
		}

//.........这里部分代码省略.........
  break;
case 484:
#line 3383 "cs-parser.jay"
  {
		yyVal = new BaseIndexerAccess ((Arguments) yyVals[-1+yyTop], GetLocation (yyVals[-3+yyTop]));
	  }
  break;
case 485:
#line 3387 "cs-parser.jay"
  {
	  	Error_SyntaxError (yyToken);
		yyVal = new BaseAccess (null, GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 486:
#line 3395 "cs-parser.jay"
  {
		yyVal = new UnaryMutator (UnaryMutator.Mode.PostIncrement, (Expression) yyVals[-1+yyTop], GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 487:
#line 3402 "cs-parser.jay"
  {
		yyVal = new UnaryMutator (UnaryMutator.Mode.PostDecrement, (Expression) yyVals[-1+yyTop], GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 488:
#line 3409 "cs-parser.jay"
  {
		if (yyVals[0+yyTop] != null) {
			if (RootContext.Version <= LanguageVersion.ISO_2)
				Report.FeatureIsNotAvailable (GetLocation (yyVals[-4+yyTop]), "object initializers");
				
			yyVal = new NewInitialize ((Expression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-4+yyTop]));
		}
		else
			yyVal = new New ((Expression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], GetLocation (yyVals[-4+yyTop]));
	  }
  break;
case 489:
#line 3420 "cs-parser.jay"
  {
		if (RootContext.Version <= LanguageVersion.ISO_2)
			Report.FeatureIsNotAvailable (GetLocation (yyVals[-1+yyTop]), "collection initializers");
	  
		yyVal = new NewInitialize ((Expression) yyVals[-1+yyTop], null, (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-1+yyTop]));
	  }
  break;
case 490:
#line 3432 "cs-parser.jay"
  {
		yyVal = new ArrayCreation ((FullNamedExpression) yyVals[-5+yyTop], (List<Expression>) yyVals[-3+yyTop], (string) yyVals[-1+yyTop], (ArrayInitializer) yyVals[0+yyTop], GetLocation (yyVals[-5+yyTop]));
	  }
  break;
case 491:
#line 3436 "cs-parser.jay"
  {
	  	if (yyVals[0+yyTop] == null)
	  		Report.Error (1586, GetLocation (yyVals[-2+yyTop]), "Array creation must have array size or array initializer");

		yyVal = new ArrayCreation ((FullNamedExpression) yyVals[-2+yyTop], (string) yyVals[-1+yyTop], (ArrayInitializer) yyVals[0+yyTop], GetLocation (yyVals[-2+yyTop]));
	  }
  break;
case 492:
#line 3443 "cs-parser.jay"
  {

		public void EmitNew (EmitContext ec, New source, bool leave_copy)
		{
			if (!source.Emit (ec, this)) {
				if (leave_copy)
					throw new NotImplementedException ();

				return;
			}

			throw new NotImplementedException ();
		}

		//
		// Checks whether the type is an interface that has the
		// [ComImport, CoClass] attributes and must be treated
		// specially
		//
		public Expression CheckComImport (ResolveContext ec)
		{
			if (!type.IsInterface)
				return null;

			//
			// Turn the call into:
			// (the-interface-stated) (new class-referenced-in-coclassattribute ())
			//
			Type real_class = AttributeTester.GetCoClassAttribute (type);
			if (real_class == null)
				return null;

			New proxy = new New (new TypeExpression (real_class, loc), Arguments, loc);
			Cast cast = new Cast (new TypeExpression (type, loc), proxy, loc);
			return cast.Resolve (ec);
		}

void case_493()
{
		Error_SyntaxError (yyToken);
		/* It can be any of new expression, create the most common one*/
		yyVal = new New ((FullNamedExpression) yyVals[-1+yyTop], null, GetLocation (yyVals[-2+yyTop]));
	  }

//.........这里部分代码省略.........
case 505:
#line 3739 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
	  	yyVal = new ElementAccess (new BaseThis (GetLocation (yyVals[-3+yyTop])), (Arguments) yyVals[-1+yyTop], GetLocation (yyVals[-2+yyTop]));
		lbag.AddLocation (yyVal, GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 506:
#line 3744 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
	  	Error_SyntaxError (yyToken);
		yyVal = new ElementAccess (null, null, GetLocation (yyVals[-1+yyTop]));
	  }
  break;
case 507:
#line 3752 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
		yyVal = new UnaryMutator (UnaryMutator.Mode.PostIncrement, (Expression) yyVals[-1+yyTop], GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 508:
#line 3759 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
		yyVal = new UnaryMutator (UnaryMutator.Mode.PostDecrement, (Expression) yyVals[-1+yyTop], GetLocation (yyVals[0+yyTop]));
	  }
  break;
case 509:
#line 3766 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
		if (yyVals[0+yyTop] != null) {
			if (lang_version <= LanguageVersion.ISO_2)
				FeatureIsNotAvailable (GetLocation (yyVals[-5+yyTop]), "object initializers");
				
			yyVal = new NewInitialize ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-5+yyTop]));
		} else {
			yyVal = new New ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], GetLocation (yyVals[-5+yyTop]));
		}
		
		lbag.AddLocation (yyVal, GetLocation (yyVals[-3+yyTop]), GetLocation (yyVals[-1+yyTop]));
	  }
  break;
case 510:
#line 3779 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
		if (lang_version <= LanguageVersion.ISO_2)
			FeatureIsNotAvailable (GetLocation (yyVals[-2+yyTop]), "collection initializers");
	  
		yyVal = new NewInitialize ((FullNamedExpression) yyVals[-1+yyTop], null, (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-2+yyTop]));
	  }
  break;
case 511:
#line 3791 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
		yyVal = new ArrayCreation ((FullNamedExpression) yyVals[-5+yyTop], (List<Expression>) yyVals[-3+yyTop],
				new ComposedTypeSpecifier (((List<Expression>) yyVals[-3+yyTop]).Count, GetLocation (yyVals[-4+yyTop])) {
	  				Next = (ComposedTypeSpecifier) yyVals[-1+yyTop]
			  	}, (ArrayInitializer) yyVals[0+yyTop], GetLocation (yyVals[-6+yyTop]));
		lbag.AddLocation (yyVal, GetLocation (yyVals[-4+yyTop]), GetLocation (yyVals[-2+yyTop]));
	  }
  break;
case 512:
#line 3799 "D:\GitHub\M\Marvin\mcs\cs-parser.jay"
  {
	  	if (yyVals[0+yyTop] == null)
	  		report.Error (1586, GetLocation (yyVals[-3+yyTop]), "Array creation must have array size or array initializer");

void case_493()
#line 3383 "C:\Projects\Junk\mono\mcs\class\Mono.CSharp\..\..\mcs\cs-parser.jay"
{
		if (yyVals[0+yyTop] != null) {
			if (lang_version <= LanguageVersion.ISO_2)
				FeatureIsNotAvailable (GetLocation (yyVals[-5+yyTop]), "object initializers");
				
			yyVal = new NewInitialize ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], (CollectionOrObjectInitializers) yyVals[0+yyTop], GetLocation (yyVals[-5+yyTop]));
		} else {
			yyVal = new New ((FullNamedExpression) yyVals[-4+yyTop], (Arguments) yyVals[-2+yyTop], GetLocation (yyVals[-5+yyTop]));
		}
		
		lbag.AddLocation (yyVal, GetLocation (yyVals[-3+yyTop]), GetLocation (yyVals[-1+yyTop]));
	  }