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
next reply other threads:[~2021-01-29 19:50 UTC|newest]
Thread overview: 4+ 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
2024-04-05 8:37 ` Herbert Xu
2024-04-05 8:36 ` [PATCH]: allow $(()) Herbert Xu
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