From e03b3f477bcc160b72af4ab09cd8d12081017d2c Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Sun, 19 Feb 2017 08:30:45 -0500
Subject: Lots of things, but mostly evaluation

---
 dice-lang/src/bjc/dicelang/v2/StreamEngine.java | 83 +++++++++++++++----------
 1 file changed, 50 insertions(+), 33 deletions(-)

(limited to 'dice-lang/src/bjc/dicelang/v2/StreamEngine.java')

diff --git a/dice-lang/src/bjc/dicelang/v2/StreamEngine.java b/dice-lang/src/bjc/dicelang/v2/StreamEngine.java
index afd4bc1..39bbc0d 100644
--- a/dice-lang/src/bjc/dicelang/v2/StreamEngine.java
+++ b/dice-lang/src/bjc/dicelang/v2/StreamEngine.java
@@ -11,23 +11,29 @@ public class StreamEngine {
 	private Tape<IList<String>> streams;
 	private IList<String>       currStream;
 
-	public StreamEngine(DiceLangEngine eng) {
+	public StreamEngine(DiceLangEngine engine) {
+		eng = engine;
+	}
+
+	private void init() {
 		streams = new SingleTape<>();
 
 		currStream = new FunctionalList<>();
-		streams.append(currStream);
+		streams.insertBefore(currStream);
 	}
 
 	public boolean doStreams(String[] toks, IList<String> dest) {
+		init();
+
 		for(String tk : toks) {
-			if(tk.startsWith("{@")) {
+			if(tk.startsWith("{@S")) {
 				if(!processCommand(tk)) return false;
 			} else {
 				currStream.add(tk);
 			}
 		}
 
-		for(String tk : currStream.toIterable()) {
+		for(String tk : currStream) {
 			dest.add(tk);
 		}
 
@@ -35,38 +41,49 @@ public class StreamEngine {
 	}
 
 	private boolean processCommand(String tk) {
-		switch(tk.charAt(2)) {
-			case '+':
-				streams.add(new FunctionalList<>());
-				break;
-			case '>':
-				if(!streams.right()) {
-					System.out.println("\tERROR: Attempted to switch to non-existent stream");
-					return false;
-				}
+		char[] comms = null;
 
-				currStream = streams.item();
-				break;
-			case '<':
-				if(!streams.left()) {
-					System.out.println("\tERROR: Attempted to switch to non-existent stream");
-					return false;
-				}
+		if(tk.length() > 5) {
+			comms = tk.substring(3, tk.length() - 1).toCharArray();
+		} else {
+			comms = new char[1];
+			comms[0] = tk.charAt(3);
+		}
+
+		for(char comm : comms) {
+			switch(comm) {
+				case '+':
+					streams.insertAfter(new FunctionalList<>());
+					break;
+				case '>':
+					if(!streams.right()) {
+						System.out.println("\tERROR: Attempted to switch to non-existent stream");
+						return false;
+					}
+
+					currStream = streams.item();
+					break;
+				case '<':
+					if(!streams.left()) {
+						System.out.println("\tERROR: Attempted to switch to non-existent stream");
+						return false;
+					}
 
-				currStream = streams.item();
-				break;
-			case '-':
-				if(streams.size() == 1) {
-					System.out.println("\tERROR: Cannot delete last stream");
-					return false;
-				} else {
-					streams.remove();
 					currStream = streams.item();
-				}
-				break;
-			default:
-				System.out.println("\tERROR: Unknown stream control command: " + tk);
-				return false;
+					break;
+				case '-':
+					if(streams.size() == 1) {
+						System.out.println("\tERROR: Cannot delete last stream");
+						return false;
+					} else {
+						streams.remove();
+						currStream = streams.item();
+					}
+					break;
+				default:
+					System.out.println("\tERROR: Unknown stream control command: " + tk);
+					return false;
+			}
 		}
 
 		return true;
-- 
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