From 0029bfc3cf4fdee2bcd86689a8d9a2a8f4dd553a Mon Sep 17 00:00:00 2001
From: "Benjamin J. Culkin" <bjculkin@mix.wvu.edu>
Date: Wed, 30 May 2018 15:57:04 -0300
Subject: Group changes

Start work on getting groups to behave correctly
---
 base/src/bjc/dicelang/Parser.java | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'base/src/bjc/dicelang/Parser.java')

diff --git a/base/src/bjc/dicelang/Parser.java b/base/src/bjc/dicelang/Parser.java
index ffbfb9d..1b2a0bd 100644
--- a/base/src/bjc/dicelang/Parser.java
+++ b/base/src/bjc/dicelang/Parser.java
@@ -136,7 +136,21 @@ public class Parser {
 		 * AST forest.
 		 */
 		for(final ITree<Node> ast : working) {
-			results.add(ast);
+			/* Make sure that the tree are well-formed */
+			if(ast.containsMatching((val) -> {
+				switch(val.type) {
+				case OGROUP:
+					return true;
+				default:
+					return false;
+				}
+			})) {
+				System.out.printf("\tERROR: Malformed tree:\n%s\n", ast);
+
+				return false;
+			} else {
+				results.add(ast);
+			}
 		}
 
 		return true;
-- 
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