C# CSharp.TypeParameterMutator类代码示例

		//
		// Creates a proxy base method call inside this container for hoisted base member calls
		//
		public MethodSpec CreateHoistedBaseCallProxy (ResolveContext rc, MethodSpec method)
		{
			Method proxy_method;

			//
			// One proxy per base method is enough
			//
			if (hoisted_base_call_proxies == null) {
				hoisted_base_call_proxies = new Dictionary<MethodSpec, Method> ();
				proxy_method = null;
			} else {
				hoisted_base_call_proxies.TryGetValue (method, out proxy_method);
			}

			if (proxy_method == null) {
				string name = CompilerGeneratedContainer.MakeName (method.Name, null, "BaseCallProxy", hoisted_base_call_proxies.Count);

				MemberName member_name;
				TypeArguments targs = null;
				TypeSpec return_type = method.ReturnType;
				var local_param_types = method.Parameters.Types;

				if (method.IsGeneric) {
					//
					// Copy all base generic method type parameters info
					//
					var hoisted_tparams = method.GenericDefinition.TypeParameters;
					var tparams = new TypeParameters ();

					targs = new TypeArguments ();
					targs.Arguments = new TypeSpec[hoisted_tparams.Length];
					for (int i = 0; i < hoisted_tparams.Length; ++i) {
						var tp = hoisted_tparams[i];
						var local_tp = new TypeParameter (tp, null, new MemberName (tp.Name, Location), null);
						tparams.Add (local_tp);

						targs.Add (new SimpleName (tp.Name, Location));
						targs.Arguments[i] = local_tp.Type;
					}

					member_name = new MemberName (name, tparams, Location);

					//
					// Mutate any method type parameters from original
					// to newly created hoisted version
					//
					var mutator = new TypeParameterMutator (hoisted_tparams, tparams);
					return_type = mutator.Mutate (return_type);
					local_param_types = mutator.Mutate (local_param_types);
				} else {
					member_name = new MemberName (name);
				}

				var base_parameters = new Parameter[method.Parameters.Count];
				for (int i = 0; i < base_parameters.Length; ++i) {
					var base_param = method.Parameters.FixedParameters[i];
					base_parameters[i] = new Parameter (new TypeExpression (local_param_types [i], Location),
						base_param.Name, base_param.ModFlags, null, Location);
					base_parameters[i].Resolve (this, i);
				}

				var cloned_params = ParametersCompiled.CreateFullyResolved (base_parameters, method.Parameters.Types);
				if (method.Parameters.HasArglist) {
					cloned_params.FixedParameters[0] = new Parameter (null, "__arglist", Parameter.Modifier.NONE, null, Location);
					cloned_params.Types[0] = Module.PredefinedTypes.RuntimeArgumentHandle.Resolve ();
				}

				// Compiler generated proxy
				proxy_method = new Method (this, new TypeExpression (return_type, Location),
					Modifiers.PRIVATE | Modifiers.COMPILER_GENERATED | Modifiers.DEBUGGER_HIDDEN,
					member_name, cloned_params, null);

				var block = new ToplevelBlock (Compiler, proxy_method.ParameterInfo, Location) {
					IsCompilerGenerated = true
				};

				var mg = MethodGroupExpr.CreatePredefined (method, method.DeclaringType, Location);
				mg.InstanceExpression = new BaseThis (method.DeclaringType, Location);
				if (targs != null)
					mg.SetTypeArguments (rc, targs);

				// Get all the method parameters and pass them as arguments
				var real_base_call = new Invocation (mg, block.GetAllParametersArguments ());
				Statement statement;
				if (method.ReturnType.Kind == MemberKind.Void)
					statement = new StatementExpression (real_base_call);
				else
					statement = new Return (real_base_call, Location);

				block.AddStatement (statement);
				proxy_method.Block = block;

				members.Add (proxy_method);
				proxy_method.Define ();
				proxy_method.PrepareEmit ();

				hoisted_base_call_proxies.Add (method, proxy_method);
//.........这里部分代码省略.........

		public HoistedStoreyClass (TypeDefinition parent, MemberName name, TypeParameters tparams, Modifiers mods, MemberKind kind)
			: base (parent, name, mods | Modifiers.PRIVATE, kind)
		{

			if (tparams != null) {
				var type_params = name.TypeParameters;
				var src = new TypeParameterSpec[tparams.Count];
				var dst = new TypeParameterSpec[tparams.Count];

				for (int i = 0; i < tparams.Count; ++i) {
					type_params[i] = tparams[i].CreateHoistedCopy (spec);

					src[i] = tparams[i].Type;
					dst[i] = type_params[i].Type;
				}

				// A copy is not enough, inflate any type parameter constraints
				// using a new type parameters
				var inflator = new TypeParameterInflator (this, null, src, dst);
				for (int i = 0; i < tparams.Count; ++i) {
					src[i].InflateConstraints (inflator, dst[i]);
				}

				mutator = new TypeParameterMutator (tparams, type_params);
			}
		}

		public MethodSpec Mutate (TypeParameterMutator mutator)
		{
			var targs = TypeArguments;
			if (targs != null)
				targs = mutator.Mutate (targs);

			var decl = DeclaringType;
			if (DeclaringType.IsGenericOrParentIsGeneric) {
				decl = mutator.Mutate (decl);
			}

			if (targs == TypeArguments && decl == DeclaringType)
				return this;

			var ms = (MethodSpec) MemberwiseClone ();
			if (decl != DeclaringType) {
				ms.inflatedMetaInfo = null;
				ms.declaringType = decl;
				ms.state |= StateFlags.PendingMetaInflate;
			}

			if (targs != null) {
				ms.targs = targs;
				ms.state |= StateFlags.PendingMakeMethod;
			}

			return ms;
		}

		public FieldSpec Mutate (TypeParameterMutator mutator)
		{
			var decl = DeclaringType;
			if (DeclaringType.IsGenericOrParentIsGeneric)
				decl = mutator.Mutate (decl);

			if (decl == DeclaringType)
				return this;

			var fs = (FieldSpec) MemberwiseClone ();
			fs.declaringType = decl;
			fs.state |= StateFlags.PendingMetaInflate;

			// Gets back FieldInfo in case of metaInfo was inflated
			fs.metaInfo = MemberCache.GetMember (TypeParameterMutator.GetMemberDeclaringType (DeclaringType), this).metaInfo;
			return fs;
		}

		public MethodSpec Mutate (TypeParameterMutator mutator)
		{
			var targs = TypeArguments;
			if (targs != null)
				targs = mutator.Mutate (targs);

			var decl = DeclaringType;
			if (DeclaringType.IsGenericOrParentIsGeneric) {
				decl = mutator.Mutate (decl);
			}

			if (targs == TypeArguments && decl == DeclaringType)
				return this;

			var ms = (MethodSpec) MemberwiseClone ();
			if (decl != DeclaringType) {
				// Gets back MethodInfo in case of metaInfo was inflated
				ms.metaInfo = MemberCache.GetMember (TypeParameterMutator.GetMemberDeclaringType (DeclaringType), this).metaInfo;

				ms.declaringType = decl;
				ms.state |= StateFlags.PendingMetaInflate;
			}

			if (targs != null) {
				ms.targs = targs;
				ms.state |= StateFlags.PendingMakeMethod;
			}

			return ms;
		}

		protected void EmitCall (EmitContext ec, Expression binder, Arguments arguments, bool isStatement)
		{
			//
			// This method generates all internal infrastructure for a dynamic call. The
			// reason why it's quite complicated is the mixture of dynamic and anonymous
			// methods. Dynamic itself requires a temporary class (ContainerX) and anonymous
			// methods can generate temporary storey as well (AnonStorey). Handling MVAR
			// type parameters rewrite is non-trivial in such case as there are various
			// combinations possible therefore the mutator is not straightforward. Secondly
			// we need to keep both MVAR(possibly VAR for anon storey) and type VAR to emit
			// correct Site field type and its access from EmitContext.
			//

			int dyn_args_count = arguments == null ? 0 : arguments.Count;
			int default_args = isStatement ? 1 : 2;
			var module = ec.Module;

			bool has_ref_out_argument = false;
			var targs = new TypeExpression[dyn_args_count + default_args];
			targs[0] = new TypeExpression (module.PredefinedTypes.CallSite.TypeSpec, loc);

			TypeExpression[] targs_for_instance = null;
			TypeParameterMutator mutator;

			var site_container = ec.CreateDynamicSite ();

			if (context_mvars != null) {
				TypeParameters tparam;
				TypeContainer sc = site_container;
				do {
					tparam = sc.CurrentTypeParameters;
					sc = sc.Parent;
				} while (tparam == null);

				mutator = new TypeParameterMutator (context_mvars, tparam);

				if (!ec.IsAnonymousStoreyMutateRequired) {
					targs_for_instance = new TypeExpression[targs.Length];
					targs_for_instance[0] = targs[0];
				}
			} else {
				mutator = null;
			}

			for (int i = 0; i < dyn_args_count; ++i) {
				Argument a = arguments[i];
				if (a.ArgType == Argument.AType.Out || a.ArgType == Argument.AType.Ref)
					has_ref_out_argument = true;

				var t = a.Type;

				// Convert any internal type like dynamic or null to object
				if (t.Kind == MemberKind.InternalCompilerType)
					t = ec.BuiltinTypes.Object;

				if (targs_for_instance != null)
					targs_for_instance[i + 1] = new TypeExpression (t, loc);

				if (mutator != null)
					t = t.Mutate (mutator);

				targs[i + 1] = new TypeExpression (t, loc);
			}

			TypeExpr del_type = null;
			TypeExpr del_type_instance_access = null;
			if (!has_ref_out_argument) {
				string d_name = isStatement ? "Action" : "Func";

				TypeSpec te = null;
				Namespace type_ns = module.GlobalRootNamespace.GetNamespace ("System", true);
				if (type_ns != null) {
					te = type_ns.LookupType (module, d_name, dyn_args_count + default_args, LookupMode.Normal, loc);
				}

				if (te != null) {
					if (!isStatement) {
						var t = type;
						if (t.Kind == MemberKind.InternalCompilerType)
							t = ec.BuiltinTypes.Object;

						if (targs_for_instance != null)
							targs_for_instance[targs_for_instance.Length - 1] = new TypeExpression (t, loc);

						if (mutator != null)
							t = t.Mutate (mutator);

						targs[targs.Length - 1] = new TypeExpression (t, loc);
					}

					del_type = new GenericTypeExpr (te, new TypeArguments (targs), loc);
					if (targs_for_instance != null)
						del_type_instance_access = new GenericTypeExpr (te, new TypeArguments (targs_for_instance), loc);
					else
						del_type_instance_access = del_type;
				}
			}

			//
			// Create custom delegate when no appropriate predefined delegate has been found
//.........这里部分代码省略.........

		public HoistedStoreyClass (TypeContainer parent, MemberName name, TypeParameter[] tparams, Modifiers mod)
			: base (parent, name, mod | Modifiers.PRIVATE)
		{
			if (tparams != null) {
				type_params = new TypeParameter[tparams.Length];
				var src = new TypeParameterSpec[tparams.Length];
				var dst = new TypeParameterSpec[tparams.Length];

				for (int i = 0; i < type_params.Length; ++i) {
					type_params[i] = tparams[i].CreateHoistedCopy (this, spec);

					src[i] = tparams[i].Type;
					dst[i] = type_params[i].Type;
				}

				// A copy is not enough, inflate any type parameter constraints
				// using a new type parameters
				var inflator = new TypeParameterInflator (this, null, src, dst);
				for (int i = 0; i < type_params.Length; ++i) {
					src[i].InflateConstraints (inflator, dst[i]);
				}

				mutator = new TypeParameterMutator (tparams, type_params);
			}
		}

        public DynamicSiteClass(TypeContainer parent, MemberBase host, TypeParameter[] tparams)
            : base(parent, MakeMemberName (host, "DynamicSite", parent.DynamicSitesCounter, tparams, Location.Null), tparams, Modifiers.STATIC)
        {
            if (tparams != null) {
                mutator = new TypeParameterMutator (tparams, CurrentTypeParameters);
            }

            parent.DynamicSitesCounter++;
        }

		public override TypeSpec Mutate (TypeParameterMutator mutator)
		{
			var targs = TypeArguments;
			if (targs != null)
				targs = mutator.Mutate (targs);

			var decl = DeclaringType;
			if (IsNested && DeclaringType.IsGenericOrParentIsGeneric)
				decl = mutator.Mutate (decl);

			if (targs == TypeArguments && decl == DeclaringType)
				return this;

			var mutated = (InflatedTypeSpec) MemberwiseClone ();
			if (decl != DeclaringType) {
				// Gets back MethodInfo in case of metaInfo was inflated
				//mutated.info = MemberCache.GetMember<TypeSpec> (DeclaringType.GetDefinition (), this).info;

				mutated.declaringType = decl;
				mutated.state |= StateFlags.PendingMetaInflate;
			}

			if (targs != null) {
				mutated.targs = targs;
				mutated.info = null;
			}

			return mutated;
		}

		Type CreateMetaInfo (TypeParameterMutator mutator)
		{
			//
			// Converts nested type arguments into right order
			// Foo<string, bool>.Bar<int> => string, bool, int
			//
			var all = new List<Type> ();
			TypeSpec type = this;
			TypeSpec definition = type;
			do {
				if (type.GetDefinition().IsGeneric) {
					all.InsertRange (0,
						type.TypeArguments != TypeSpec.EmptyTypes ?
						type.TypeArguments.Select (l => l.GetMetaInfo ()) :
						type.MemberDefinition.TypeParameters.Select (l => l.GetMetaInfo ()));
				}

				definition = definition.GetDefinition ();
				type = type.DeclaringType;
			} while (type != null);

			return definition.GetMetaInfo ().MakeGenericType (all.ToArray ());
		}