Don't use 'delay' parser in ebnf

extra/peg/ebnf/ebnf.factor

@@ -262,8 +262,8 @@ M: ebnf-terminal (transform) ( ast -- parser )
 
 M: ebnf-non-terminal (transform) ( ast -- parser )
   symbol>>  [
-    , parser get , \ at ,  
+    , parser get , \ at , \ sp ,   
-  ] [ ] make delay sp ;
+  ] [ ] make box ;
 
 : transform-ebnf ( string -- object )
   'ebnf' parse parse-result-ast transform ;
@@ -282,7 +282,8 @@ M: ebnf-non-terminal (transform) ( ast -- parser )
 
 : ebnf>quot ( string -- hashtable quot )
   'ebnf' parse check-parse-result 
-  parse-result-ast transform dup main swap at compile [ compiled-parse ] curry ;
+  parse-result-ast transform dup dup parser [ main swap at compile ] with-variable
+  [ compiled-parse ] curry ;
 
 : [EBNF "EBNF]" parse-multiline-string ebnf>quot nip parsed ; parsing
 

extra/peg/peg.factor

@@ -489,6 +489,15 @@ M: delay-parser (compile) ( parser -- quot )
   { } { "word" } <effect> memoize-quot 
   [ % \ execute , ] [ ] make ;
 
+TUPLE: box-parser quot ;
+
+M: box-parser (compile) ( parser -- quot )
+  #! Calls the quotation at compile time
+  #! to produce the parser to be compiled.
+  #! This differs from 'delay' which calls
+  #! it at run time.
+  quot>> call compiled-parser 1quotation ;
+
 PRIVATE>
 
 : token ( string -- parser )
@@ -557,6 +566,9 @@ PRIVATE>
 : delay ( quot -- parser )
   delay-parser construct-boa init-parser ;
 
+: box ( quot -- parser )
+  box-parser construct-boa init-parser ;
+
 : PEG:
   (:) [
     [