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skeletons: simplify the protections against "unused" warnings.

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* data/c.m4 (b4_parse_param_use): Also accept optional arguments
	to "use".
	Simplify callers.
	* data/glr.c (yyuserAction): Simplify use of b4_parse_param_use.
	(yy_reduce_print): Don't use b4_parse_param_use, as all the arguments
	_are_ used.
	* data/lalr1.cc (YY_SYMBOL_PRINT): Even when disabled, "use" the
	symbol argument.
	This neutralizes a warning in yypush_ when there are no symbols
	with a semantic values.
	(yy_destroy_): Remove useless "use" of yymsg.
This commit is contained in:
Akim Demaille
2012-02-09 14:02:22 +01:00
parent f86a780785
commit beadb220d5
3 changed files with 15 additions and 21 deletions
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26
data/c.m4
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@@ -120,11 +120,15 @@ m4_popdef([$2])dnl
m4_popdef([$1])dnl
])])
# b4_parse_param_use
# ------------------
# `YYUSE' all the parse-params.
# b4_parse_param_use([VAL], [LOC])
# --------------------------------
# `YYUSE' VAL, LOC if locations are enabled, and all the parse-params.
m4_define([b4_parse_param_use],
[b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
[m4_ifval([$1], [ YYUSE([$1]);
])dnl
m4_ifval([$2], [b4_locations_if([ YYUSE ([$2]);
])])dnl
b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
])dnl
])
@@ -444,11 +448,7 @@ m4_define_default([b4_yydestruct_generate],
b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
YYUSE (yyvaluep);
]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[
]b4_parse_param_use([yyvaluep], [yylocationp])[
if (!yymsg)
yymsg = "Deleting";
YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
@@ -485,14 +485,10 @@ m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
if (!yyvaluep)
return;
]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[# ifdef YYPRINT
]b4_parse_param_use([yyoutput], [yylocationp])[
# ifdef YYPRINT
if (yytype < YYNTOKENS)
YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
# else
YYUSE (yyoutput);
# endif
switch (yytype)
{