* lib.c (intern): fix the previous diagnostic bug once more with more

feeling.

* parser.l (grammar): Recognize package prefixes in symbol tokens.
Got rid of special rule for handling lone colon.

* parser.y (sym_helper): Catch undefined package as a parsing
error rather allowing intern function to throw exception.

1 files changed, 7 insertions, 11 deletions

diff --git a/parser.l b/parser.l
index ef92db03..2ab713ab 100644
--- a/parser.l
+++ b/parser.l
@@ -166,9 +166,13 @@ BSYM    {BSCHR}({BSCHR}|#)*
 NSCHR   [a-zA-Z0-9!$%&*+\-<=>?\\^_~/]
 ID_END  [^a-zA-Z0-9!$%&*+\-<=>?\\^_~/]
 NSYM    {NSCHR}({NSCHR}|#)*
-TOK     :?{SYM}
-BTOK    [:@]?{BSYM}
-NTOK    [:@]?{NSYM}
+TOK     {SYM}
+BTREG   ({BSYM}|@)({BSYM}|#)*(:({BSYM}|#)*)?
+BTKEY   @?:({BSYM}|#)*
+BTOK    {BTREG}|{BTKEY}
+NTREG   ({NSYM}|@)({NSYM}|#)*(:({NSYM}|#)*)?
+NTKEY   @?:({NSYM}|#)*
+NTOK    {NTREG}|{NTKEY}
 WS      [\t ]*
 HEX     [0-9A-Fa-f]
 OCT     [0-7]
@@ -264,14 +268,6 @@ UONLY   {U2}{U}|{U3}{U}{U}|{U4}{U}{U}{U}
   return SYMTOK;
 }
 
-<BRACED,NESTED>: {
-  if (yy_top_state() == INITIAL
-      || yy_top_state() == QSILIT)
-    yy_pop_state();
-  yylval.lexeme = utf8_dup_from("");
-  return SYMTOK;
-}
-
 <SPECIAL>\({WS}all{WS}\) {
   yy_pop_state();
   yylval.lineno = lineno;