2 files changed, 41 insertions, 4 deletions
diff --git a/clformat/src/main/java/bjc/utils/ioutils/format/CLTokenizer.java b/clformat/src/main/java/bjc/utils/ioutils/format/CLTokenizer.java
index 7ed76d2..9fd56f5 100644
--- a/clformat/src/main/java/bjc/utils/ioutils/format/CLTokenizer.java
+++ b/clformat/src/main/java/bjc/utils/ioutils/format/CLTokenizer.java
@@ -128,6 +128,8 @@ public class CLTokenizer implements Iterator<SimpleDecree> {
 				dir = new SimpleDecree(directiveName, isUser,
 						CLParameters.fromDirective(directiveParameterString),
 						CLModifiers.fromString(directiveModifierString));
+				
+				dir.setPosition(mat.start(), mat.end());
 			}
 
 			if (tmp.equals("")) {
@@ -138,7 +140,7 @@ public class CLTokenizer implements Iterator<SimpleDecree> {
 				return dcr;
 			}
 
-			return new SimpleDecree(sb.toString());
+			return new SimpleDecree(sb.toString(), mat.start(), mat.end());
 		}
 
 		mat.appendTail(sb);
@@ -182,7 +184,10 @@ public class CLTokenizer implements Iterator<SimpleDecree> {
 		GroupDecree newGroup = new GroupDecree();
 		newGroup.opening = openedWith;
 
-		if (!hasNext()) throw new NoSuchElementException("No decrees available");
+		if (!hasNext()) {
+			String fmt = "No decrees available for group starting with %s at %#s";
+			throw new NoSuchElementException(String.format(fmt, openedWith.name, openedWith.position));
+		}
 
 		ClauseDecree curClause = new ClauseDecree();
 
@@ -233,8 +238,8 @@ public class CLTokenizer implements Iterator<SimpleDecree> {
 
 		if (newGroup.closing == null) {
 			String msg = String.format(
-					"Did not find closing directive for group (wanted \"%s\", last decree was \"%s\")",
-					desiredClosing, curDecree.name);
+					"Did not find closing directive for group (wanted \"%s\", last decree was \"%s\" at %#s)",
+					desiredClosing, curDecree.name, curDecree.position);
 
 			throw new NoSuchElementException(msg);
 		}
diff --git a/clformat/src/main/java/bjc/utils/ioutils/format/SimpleDecree.java b/clformat/src/main/java/bjc/utils/ioutils/format/SimpleDecree.java
index a7db42f..35d4355 100644
--- a/clformat/src/main/java/bjc/utils/ioutils/format/SimpleDecree.java
+++ b/clformat/src/main/java/bjc/utils/ioutils/format/SimpleDecree.java
@@ -1,5 +1,8 @@
 package bjc.utils.ioutils.format;
 
+import bjc.data.Pair;
+import bjc.data.SimplePair;
+
 /**
  * A decree is the building blocks of what we need to pick and call a directive.
  *
@@ -35,6 +38,11 @@ public class SimpleDecree implements Decree {
 	public CLModifiers modifiers;
 
 	/**
+	 * The position in the input this decree had
+	 */
+	public Pair<Integer, Integer> position;
+	
+	/**
 	 * Create a new blank decree.
 	 */
 	public SimpleDecree() {
@@ -54,6 +62,20 @@ public class SimpleDecree implements Decree {
 	}
 
 	/**
+	 * Create a new literal text directive.
+	 *
+	 * @param txt
+	 *            The text of the directive.
+	 * @param start The starting position of this directive
+	 * @param end The ending position of this directive
+	 */
+	public SimpleDecree(String txt, int start, int end) {
+		this(txt);
+		
+		this.setPosition(start, end);
+	}
+	
+	/**
 	 * Create a new directive.
 	 *
 	 * @param name
@@ -120,6 +142,16 @@ public class SimpleDecree implements Decree {
 		else           return name.equals(nam);
 	}
 
+	/**
+	 * Set the position of this decree.
+	 * 
+	 * @param start The starting position of this decree
+	 * @param end The ending position of this decree
+	 */
+	public void setPosition(int start, int end) {
+		position = new SimplePair<>(start, end);
+	}
+	
 	@Override
 	public String toString() {
 		return String.format(