Merge pull request #4 from jbclements/cfg-parser-lexer-bug

add test and easy fix for cfg bug
7 years ago · 80ea2be9e9
parent c9fd206a1c c3c3dfc25b
commit 80ea2be9e9
1 changed files with 8 additions and 3 deletions
--- a/parser-tools-lib/parser-tools/cfg-parser.rkt
+++ b/parser-tools-lib/parser-tools/cfg-parser.rkt
@ -731,7 +731,7 @@
                                      src-pos?
                                      (cons (car clauses) parser-clauses))]))))])
         #`(let ([orig-parse (parser 
-                              [error (lambda (a b c)
+                              [error (lambda (a b c . ignored)
                                       (error 'cfg-parser "unexpected ~a token: ~a" b c))]
                              . #,parser-clauses)]
                 [error-proc #,cfg-error])
@ -906,10 +906,15 @@
                  (list (position-token 
                         (token-ZERO "zero")
                         (position 2 2 5) 
-                         (position 3 2 6))))))))
+                         (position 3 2 6)))))))

   
-  
+   (check-exn #px"unexpected BOGUS token: #f"
+              (λ ()(parse (sequence->tokenizer
+                           (list (position-token
+                                  'BOGUS
+                                  (position 2 2 5)
+                                  (position 3 2 6))))))))
  
  
  ;; Tests used during development