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warnings: enable -Wuseless-cast, and eliminate warnings

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Prompted by Frank Heckenbach.
https://lists.gnu.org/archive/html/bug-bison/2019-11/msg00016.html.

* configure.ac (warn_cxx): Add -Wuseless-cast.
* data/skeletons/c.m4 (b4_attribute_define): Define
YY_IGNORE_USELESS_CAST_BEGIN and YY_IGNORE_USELESS_CAST_END.
* data/skeletons/glr.c (YY_FPRINTF): New, replaces YYFPRINTF, wrapped
with YY_IGNORE_USELESS_CAST_BEGIN and YY_IGNORE_USELESS_CAST_END.
(YY_DPRINTF): Likewise.
* tests/actions.at: Remove useless cast.
* tests/headers.at: Adjust.
This commit is contained in:
Akim Demaille
2019-11-30 09:23:35 +01:00
parent 9e9e49224f
commit f8d82ff039
7 changed files with 153 additions and 100 deletions
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14
data/skeletons/yacc.c
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@@ -854,8 +854,10 @@ yy_lac_stack_realloc (YYPTRDIFF_T *yycapacity, YYPTRDIFF_T yyadd,
*yybottom = yybottom_new;
*yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
[full], [[
YY_IGNORE_USELESS_CAST_BEGIN
YYDPRINTF ((stderr, "%srealloc to %ld%s", yydebug_prefix,
YY_CAST (long, yyalloc), yydebug_suffix));]])[
YY_CAST (long, yyalloc), yydebug_suffix));
YY_IGNORE_USELESS_CAST_END]])[
}
return 0;
}
@@ -1012,7 +1014,9 @@ yy_lac (yy_state_t *yyesa, yy_state_t **yyes,
if (yyesp == yyes_prev)
{
yyesp = *yyes;
YY_IGNORE_USELESS_CAST_BEGIN
*yyesp = YY_CAST (yy_state_t, yystate);
YY_IGNORE_USELESS_CAST_END
}
else
{
@@ -1025,7 +1029,9 @@ yy_lac (yy_state_t *yyesa, yy_state_t **yyes,
YYDPRINTF ((stderr, "\n"));
return 2;
}
YY_IGNORE_USELESS_CAST_BEGIN
*++yyesp = YY_CAST (yy_state_t, yystate);
YY_IGNORE_USELESS_CAST_END
}
YYDPRINTF ((stderr, " G%d", yystate));
}
@@ -1492,7 +1498,9 @@ yynewstate:
yysetstate:
YYDPRINTF ((stderr, "Entering state %d\n", yystate));
YY_ASSERT (0 <= yystate && yystate < YYNSTATES);
*yyssp = YY_CAST (yy_state_t, yystate);
YY_IGNORE_USELESS_CAST_BEGIN
*yyssp = YY_CAST (yy_state_t, yystate);
YY_IGNORE_USELESS_CAST_END
if (yyss + yystacksize - 1 <= yyssp)
#if !defined yyoverflow && !defined YYSTACK_RELOCATE
@@ -1552,8 +1560,10 @@ yysetstate:
yyvsp = yyvs + yysize - 1;]b4_locations_if([
yylsp = yyls + yysize - 1;])[
YY_IGNORE_USELESS_CAST_BEGIN
YYDPRINTF ((stderr, "Stack size increased to %ld\n",
YY_CAST (long, yystacksize)));
YY_IGNORE_USELESS_CAST_END
if (yyss + yystacksize - 1 <= yyssp)
YYABORT;