Mono.CSharp.Switch.ResolveStringSwitchMap C# (CSharp) Method

		void ResolveStringSwitchMap (ResolveContext ec)
		{
			FullNamedExpression string_dictionary_type;
			if (TypeManager.generic_ienumerable_type != null) {
				MemberAccess system_collections_generic = new MemberAccess (new MemberAccess (
					new QualifiedAliasMember (QualifiedAliasMember.GlobalAlias, "System", loc), "Collections", loc), "Generic", loc);

				string_dictionary_type = new MemberAccess (system_collections_generic, "Dictionary",
					new TypeArguments (
						new TypeExpression (TypeManager.string_type, loc),
						new TypeExpression (TypeManager.int32_type, loc)), loc);
			} else {
				MemberAccess system_collections_generic = new MemberAccess (
					new QualifiedAliasMember (QualifiedAliasMember.GlobalAlias, "System", loc), "Collections", loc);

				string_dictionary_type = new MemberAccess (system_collections_generic, "Hashtable", loc);
			}

			var ctype = ec.CurrentMemberDefinition.Parent.PartialContainer;
			Field field = new Field (ctype, string_dictionary_type,
				Modifiers.STATIC | Modifiers.PRIVATE | Modifiers.COMPILER_GENERATED,
				new MemberName (CompilerGeneratedClass.MakeName (null, "f", "switch$map", unique_counter++), loc), null);
			if (!field.Define ())
				return;
			ctype.AddField (field);

			var init = new List<Expression> ();
			int counter = 0;
			Elements.Clear ();
			string value = null;
			foreach (SwitchSection section in Sections) {
				int last_count = init.Count;
				foreach (SwitchLabel sl in section.Labels) {
					if (sl.Label == null || sl.Converted == SwitchLabel.NullStringCase)
						continue;

					value = (string) sl.Converted;
					var init_args = new List<Expression> (2);
					init_args.Add (new StringLiteral (value, sl.Location));
					init_args.Add (new IntConstant (counter, loc));
					init.Add (new CollectionElementInitializer (init_args, loc));
				}

				//
				// Don't add empty sections
				//
				if (last_count == init.Count)
					continue;

				Elements.Add (counter, section.Labels [0]);
				++counter;
			}

			Arguments args = new Arguments (1);
			args.Add (new Argument (new IntConstant (init.Count, loc)));
			Expression initializer = new NewInitialize (string_dictionary_type, args,
				new CollectionOrObjectInitializers (init, loc), loc);

			switch_cache_field = new FieldExpr (field, loc);
			string_dictionary = new SimpleAssign (switch_cache_field, initializer.Resolve (ec));
		}