Code structure cleanup.

Assets/Cryville/Crtr/Ruleset/RulesetInterpreter.cs

@@ -0,0 +1,78 @@
+using Cryville.Common.Collections.Generic;
+using Cryville.Common.Pdt;
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Cryville.Crtr.Ruleset {
+	internal class RulesetInterpreter : PdtInterpreter {
+		public RulesetInterpreter(string src, Binder binder) : base(src, binder) { }
+
+		readonly List<RulesetSelector> s = new List<RulesetSelector>();
+		readonly HashSet<string> a = new HashSet<string>();
+		protected override object InterpretKey(Type type) {
+			if (PairCollection<JudgeAction, PdtExpression>.IsPairCollection(type))
+				return InterpretJudgeAction();
+			else if (type == typeof(Constraint))
+				return InterpretConstraintKey();
+			else
+				return base.InterpretKey(type);
+		}
+		object InterpretJudgeAction() {
+			a.Clear();
+			while (true) {
+				int pp = Position;
+				switch (cc) {
+					case '@':
+						GetChar();
+						a.Add(GetIdentifier());
+						break;
+					default:
+						return JudgeAction.Construct(a, (string)base.InterpretKey(null));
+				}
+				ws();
+				if (Position == pp) throw new FormatException("Invalid judge action format.");
+			}
+		}
+		object InterpretConstraintKey() {
+			s.Clear(); a.Clear();
+			string key = "";
+			while (true) {
+				int pp = Position;
+				switch (cc) {
+					case '@':
+						GetChar();
+						a.Add(GetIdentifier());
+						break;
+					case '$':
+						GetChar();
+						s.Add(new RulesetSelector.CreateItem());
+						key = null;
+						break;
+					case '#':
+						GetChar();
+						s.Add(new RulesetSelector.Index());
+						break;
+					case '>':
+						GetChar();
+						s.Add(new RulesetSelector.Property(GetExp()));
+						break;
+					case ';':
+					case ':':
+						return new ConstraintKey(a.Contains("var") ? ConstraintType.Variable : ConstraintType.Property, key);
+					case '{':
+						return new RulesetSelectors(s);
+					case '}':
+						return null;
+					default:
+						var p4 = GetIdentifier();
+						s.Add(new RulesetSelector.EventType(p4));
+						if (key != null) key += p4;
+						break;
+				}
+				ws();
+				if (Position == pp) throw new FormatException("Invalid selector or key format.");
+			}
+		}
+	}
+}