Add in_area function. (Amend)

Assets/Cryville/Common/Pdt/PdtVariableMemory.cs

@@ -20,6 +20,13 @@ namespace Cryville.Common.Pdt {
 			Length = len;
 		}
 		/// <summary>
+		/// Copies the memory in the span to another span.
+		/// </summary>
+		/// <param name="dest">The destination span.</param>
+		public void CopyTo(PdtVariableMemory dest) {
+			CopyTo(dest._ptr, 0, Length);
+		}
+		/// <summary>
 		/// Copies the memory in the span to a buffer.
 		/// </summary>
 		/// <param name="dest">The destination buffer.</param>

Assets/Cryville/Crtr/PdtEvaluator.cs

@@ -388,14 +388,18 @@ namespace Cryville.Crtr {
 			public func_in_area() : base(1) { }
 			protected override unsafe void Execute() {
 				var arg = GetOperand(0);
-				if (arg.Type == PdtInternalType.Number && arg.AsNumber() >= 0) {
+				if (arg.Type == PdtInternalType.Error) {
-					GetReturnFrame(PdtInternalType.Null, 0);
+					throw new InvalidOperationException("Error");
-					return;
 				}
+				else if (arg.Type == PdtInternalType.Number && arg.AsNumber() >= 0) {
+					GetReturnFrame(PdtInternalType.Null, 0);
+				}
+				else {
 					var ret = GetReturnFrame(arg.Type, arg.Length);
 					arg.CopyTo(ret);
 				}
 			}
+		}
 		unsafe static class oputil {
 			public static float AsNumber(PropSrc src) {
 				if (src == null)