Adds basics for predefined function parameter types

Upsilon/BoundTypes/BoundTypeHandler.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using Upsilon.BaseTypes;
+
+namespace Upsilon.BoundTypes
+{
+    public static class BoundTypeHandler
+    {
+        private static Dictionary<string, BoundTypeDefinition> _typeDefinitions = new Dictionary<string, BoundTypeDefinition>
+        {
+            {"string", new BoundTypeDefinition(Type.String, typeof(string))},
+            {
+                "number",
+                new BoundTypeDefinition(Type.Number,
+                    new[] {typeof(int), typeof(long), typeof(float), typeof(double)})
+            },
+            {"bool", new BoundTypeDefinition(Type.Boolean, typeof(bool))}
+        };
+
+        public static BoundTypeDefinition GetTypeDefinition(string key)
+        {
+            return _typeDefinitions[key.ToLowerInvariant()];
+        }
+    }
+
+    public class BoundTypeDefinition
+    {
+        public BoundTypeDefinition(Type scriptType, System.Type[] validInternalTypes)
+        {
+            ScriptType = scriptType;
+            ValidInternalTypes = validInternalTypes;
+        }
+
+        public BoundTypeDefinition(Type scriptType, System.Type validInternalType)
+        {
+            ScriptType = scriptType;
+            ValidInternalTypes = new []{validInternalType};
+        }
+
+        public Type ScriptType { get; }
+        public System.Type[] ValidInternalTypes { get; }
+    }
+}