added copy and fixed cleaning of semicolons

src/main/java/carpet/script/Expression.java

@@ -46,7 +46,6 @@ import java.util.function.Supplier;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
-import java.util.stream.StreamSupport;
 
 import static java.lang.Math.abs;
 import static java.lang.Math.max;
@@ -2775,6 +2774,8 @@ public class Expression implements Cloneable
     {
         addUnaryFunction("hash_code", v -> new NumericValue(v.hashCode()));
 
+        addUnaryFunction("copy", Value::deepcopy);
+
         addLazyFunction("bool", 1, (c, t, lv) -> {
             Value v = lv.get(0).evalValue(c, Context.BOOLEAN);
             if (v instanceof StringValue)
@@ -3044,21 +3045,7 @@ public class Expression implements Cloneable
 
         Tokenizer tokenizer = new Tokenizer(this, expression, allowComments, allowNewlineSubstitutions);
         // stripping lousy but acceptable semicolons
-        Iterable<Tokenizer.Token> iterable = () -> tokenizer;
-        List<Tokenizer.Token> originalTokens = StreamSupport.stream(iterable.spliterator(), false).collect(Collectors.toList());
-        List<Tokenizer.Token> cleanedTokens = new ArrayList<>();
-        Tokenizer.Token last = null;
-        while (originalTokens.size() > 0)
-        {
-            Tokenizer.Token current = originalTokens.remove(originalTokens.size()-1);
-            if (current.type != Tokenizer.Token.TokenType.OPERATOR
-                    || !current.surface.equals(";")
-                    || (last != null && last.type != Tokenizer.Token.TokenType.CLOSE_PAREN && last.type != Tokenizer.Token.TokenType.COMMA && !last.surface.equals(";")))
-                cleanedTokens.add(current);
-            if (current.type != Tokenizer.Token.TokenType.MARKER)
-                last = current;
-        }
-        Collections.reverse(cleanedTokens);
+        List<Tokenizer.Token> cleanedTokens = tokenizer.fixSemicolons();
 
         Tokenizer.Token lastFunction = null;
         Tokenizer.Token previousToken = null;