Started work on exec()

wk2/Java/src/jrr1g18/bb/Interpreter.java

 package jrr1g18.bb;
 
+import java.util.ArrayList;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -10,9 +11,9 @@ public class Interpreter {
 
 	private String m_code;
 	private int m_idx;
-	
+
 	private Map<String, Integer> m_variables;
-	
+
 	public Map<String, Integer> getVariables(String var) {
 		return m_variables;
 	}
@@ -68,6 +69,31 @@ public class Interpreter {
 		}
 		return token;
 	}
-	
-	
+
+	public void exec() {
+		ArrayList<Token> tokenHistory = new ArrayList<Token>();
+		Token lookahead;
+		int stmt_begin = 0;
+		int stmt_end = 0;
+		while(true){
+			// Find next statement
+			stmt_begin = stmt_end+1;
+			do{
+				++stmt_end;
+				lookahead = getNextToken();
+				tokenHistory.add(lookahead);
+			} while(lookahead.getType()!=TokenType.SEMICOLON);
+			// Run statement
+			for (int stmt_idx = stmt_begin; stmt_idx < stmt_end; stmt_idx++) {
+				Token currentToken = tokenHistory.get(stmt_idx);
+				switch (currentToken.getType()) {
+				case CLEAR:
+					
+				default:
+					throw new IllegalStateException("Illegal token type: "
+							+ Token.tokenTypeToString(currentToken.getType()));
+				}
+			}
+		}
+	}
 }