Add FieldLoader and linter support for BooleanExpression.

OpenRA.Game/FieldLoader.cs

@@ -15,12 +15,14 @@ using System.ComponentModel;
 using System.Drawing;
 using System.Drawing.Imaging;
 using System.Globalization;
+using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.Serialization;
 using System.Text.RegularExpressions;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
+using OpenRA.Support;
 
 namespace OpenRA
 {
@@ -396,6 +398,22 @@ namespace OpenRA
 
 				return InvalidValueAction(value, fieldType, fieldName);
 			}
+			else if (fieldType == typeof(BooleanExpression))
+			{
+				if (value != null)
+				{
+					try
+					{
+						return new BooleanExpression(value);
+					}
+					catch (InvalidDataException e)
+					{
+						throw new YamlException(e.Message);
+					}
+				}
+
+				return InvalidValueAction(value, fieldType, fieldName);
+			}
 			else if (fieldType.IsEnum)
 			{
 				try

OpenRA.Game/Support/BooleanExpression.cs

@@ -18,6 +18,7 @@ namespace OpenRA.Support
 {
 	public class BooleanExpression
 	{
+		public readonly string Expression;
 		readonly HashSet<string> variables = new HashSet<string>();
 		public IEnumerable<string> Variables { get { return variables; } }
 
@@ -68,6 +69,7 @@ namespace OpenRA.Support
 
 		public BooleanExpression(string expression)
 		{
+			Expression = expression;
 			var openParens = 0;
 			var closeParens = 0;
 			var tokens = new List<Token>();

OpenRA.Mods.Common/Lint/LintExts.cs

@@ -11,7 +11,9 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reflection;
+using OpenRA.Support;
 
 namespace OpenRA.Mods.Common.Lint
 {
@@ -26,8 +28,13 @@ namespace OpenRA.Mods.Common.Lint
 				return (string[])fieldInfo.GetValue(ruleInfo);
 			if (type == typeof(HashSet<string>))
 				return (HashSet<string>)fieldInfo.GetValue(ruleInfo);
+			if (type == typeof(BooleanExpression))
+			{
+				var expr = (BooleanExpression)fieldInfo.GetValue(ruleInfo);
+				return expr != null ? expr.Variables : Enumerable.Empty<string>();
+			}
 
-			emitError("Bad type for reference on {0}.{1}. Supported types: string, string[], HashSet<string>"
+			emitError("Bad type for reference on {0}.{1}. Supported types: string, string[], HashSet<string>, BooleanExpression"
 				.F(ruleInfo.GetType().Name, fieldInfo.Name));
 
 			return new string[] { };