diff -r 471be4752b9e -r 8081713bf7d9 core/src/luan/impl/LuanParser.java
--- a/core/src/luan/impl/LuanParser.java	Tue Apr 05 16:38:51 2016 -0600
+++ b/core/src/luan/impl/LuanParser.java	Tue Apr 05 17:37:54 2016 -0600
@@ -267,8 +267,16 @@
 		return new ExpString(code,true,false);
 	}
 
-	private ExpString constExpStr(Object obj) {
-		return new ExpString(new ConstExpr(obj));
+	private ExpString constExpStr(String s) {
+		s = s
+			.replace("\\","\\\\")
+			.replace("\"","\\\"")
+			.replace("\n","\\n")
+			.replace("\r","\\r")
+			.replace("\t","\\t")
+			.replace("\b","\\b")
+		;
+		return new ExpString( "\""+s+"\"", true,false);
 	}
 
 	private ExpString callExpStr(ExpString fn,ExpString args) {
@@ -280,12 +288,12 @@
 		ExpString exprs = TemplateExpressions(In.NOTHING);
 		if( exprs == null )
 			return null;
-		ExpString requireCall = callExpStr( constExpStr(PackageLuan.requireFn), constExpStr("luan:Io") );
+		String code = "PackageLuan.require(luan,\"luan:Io\")";
+		ExpString requireCall = new ExpString(code,true,false);
 		ExpString stdoutExp = indexExpStr( requireCall.expr(), constExpStr("stdout") );
 		ExpString writeExp = indexExpStr( stdoutExp, constExpStr("write") );
 		ExpString writeCall = callExpStr( writeExp, exprs );
-		String code = writeCall.code + ";\n";
-		return new StmtString(code);
+		return new StmtString( writeCall.code + ";\n" );
 	}
 
 	private ExpString TemplateExpressions(In in) throws ParseException {
@@ -796,10 +804,9 @@
 
 	private ExpString PowExpr(In in) throws ParseException {
 		parser.begin();
-		Expressions exp = SingleExpr(in);
-		if( exp==null )
+		ExpString exp1 = SingleExpr(in);
+		if( exp1==null )
 			return parser.failure(null);
-		ExpString exp1 = new ExpString(exp);
 		if( parser.match('^') ) {
 			Spaces(in);
 			ExpString exp2 = required(PowExpr(in));
@@ -809,18 +816,17 @@
 		return parser.success(exp1);
 	}
 
-	private Expressions SingleExpr(In in) throws ParseException {
+	private ExpString SingleExpr(In in) throws ParseException {
 		parser.begin();
-		Expressions exp;
-		exp = FunctionExpr(in);
+		Expressions exp = FunctionExpr(in);
 		if( exp != null )
-			return parser.success(exp);
-		exp = exp(VarExp(in));
-		if( exp != null )
-			return parser.success(exp);
+			return parser.success(new ExpString(exp));
+		ExpString es = VarExp(in);
+		if( es != null )
+			return parser.success(es);
 		exp = VarArgs(in);
 		if( exp != null )
-			return parser.success(exp);
+			return parser.success(new ExpString(exp));
 		return parser.failure(null);
 	}
 
@@ -1069,7 +1075,7 @@
 		}
 		String s = StringLiteral(in);
 		if( s != null ) {
-			builder.add( new ExpString(new ConstExpr(s)) );
+			builder.add( constExpStr(s) );
 			return parser.success();
 		}
 /*
@@ -1208,13 +1214,17 @@
 	private ExpString Literal(In in) throws ParseException {
 		parser.begin();
 		if( NilLiteral(in) )
-			return parser.success(constExpStr(null));
+			return parser.success(new ExpString("null",true,false));
 		Boolean b = BooleanLiteral(in);
 		if( b != null )
-			return parser.success(constExpStr(b));
+			return parser.success(new ExpString(b.toString(),true,false));
 		Number n = NumberLiteral(in);
-		if( n != null )
-			return parser.success(constExpStr(n));
+		if( n != null ) {
+			String s = n.toString();
+			if( n instanceof Long )
+				s += "L";
+			return parser.success(new ExpString(s,true,false));
+		}
 		String s = StringLiteral(in);
 		if( s != null )
 			return parser.success(constExpStr(s));
@@ -1501,6 +1511,7 @@
 				+"import luan.Luan;\n"
 				+"import luan.LuanFunction;\n"
 				+"import luan.LuanException;\n"
+				+"import luan.modules.PackageLuan;\n"
 				+"\n"
 				+"public class " + className +" implements " + superClass + " {\n"
 				+"	@Override public Object eval(LuanStateImpl luan) throws LuanException {\n"
@@ -1551,15 +1562,7 @@
 			}
 		}
 	}
-/*
-	private static List<Expressions> expList(List<ExpString> esList) {
-		List<Expressions> list = new ArrayList<Expressions>();
-		for( ExpString es : esList ) {
-			list.add(exp(es));
-		}
-		return list;
-	}
-*/
+
 	private static class StmtString {
 		final String code;
 
@@ -1581,6 +1584,7 @@
 				+"import luan.Luan;\n"
 				+"import luan.LuanFunction;\n"
 				+"import luan.LuanException;\n"
+				+"import luan.modules.PackageLuan;\n"
 				+"\n"
 				+"public class " + className +" implements Stmt {\n"
 				+"	@Override public void eval(LuanStateImpl luan) throws LuanException {\n"