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From: "Vladimir N. Oleynik" <dzo@simtreas.ru>
To: dash@vger.kernel.org
Subject: [PATCH]: allow $(())
Date: Fri, 29 Jan 2021 23:49:20 +0400	[thread overview]
Message-ID: <08178d03-1912-76e7-0733-75e8f1d691af@simtreas.ru> (raw)

Hello.

My micro patch for allow $(( )) as 0

--- arith_yacc.orig.c   2020-12-23 11:58:12.000000000 +0400
+++ arith_yacc.c        2021-01-29 23:47:01.854997852 +0400
@@ -292,10 +292,17 @@
  intmax_t arith(const char *s)
  {
         intmax_t result;
+       int l0;

         arith_buf = arith_startbuf = s;

-       result = assignment(yylex(), 0);
+       l0 = yylex();
+       if (l0 == 0) {
+               /* $(( )) */
+               yylval.val = 0;
+               l0 = ARITH_NUM;
+       }
+       result = assignment(l0, 0);

         if (last_token)
                 yyerror("expecting EOF");


--w
vodz

             reply	other threads:[~2021-01-29 19:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-29 19:49 Vladimir N. Oleynik [this message]
2021-01-31  9:29 ` [PATCH]: allow recursive variable inderection in arith Vladimir N. Oleynik

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