* data/c.m4 (yydestruct, yysymprint):

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index cbce25b18c35d2e706e32d4d40aeb3b95ed281c2..1a141108659772fd7e62f2f3344843e7e80b1423 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -246,6 +246,9 @@ b4_syncline([@oline@], [@ofile@])[
 # endif
 #endif
 
+/* Suppress unused-variable warnings by "using" E.  */
+#define YYUSE(e) do {;} while (/*CONSTCOND*/ 0 && (e))
+
 #if ! defined (yyoverflow) || YYERROR_VERBOSE
 
 /* The parser invokes alloca or malloc; define the necessary symbols.  */
@@ -355,7 +358,7 @@ union yyalloc
          for (yyi = 0; yyi < (Count); yyi++)   \
            (To)[yyi] = (From)[yyi];            \
        }                                       \
-      while (0)
+      while (/*CONSTCOND*/ 0)
 #  endif
 # endif
 
@@ -373,7 +376,7 @@ union yyalloc
        yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
        yyptr += yynewbytes / sizeof (*yyptr);                          \
       }                                                                        \
-    while (0)
+    while (/*CONSTCOND*/ 0)
 
 #endif
 
@@ -544,7 +547,7 @@ do                                                          \
       yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
       YYERROR;                                                 \
     }                                                          \
-while (0)
+while (/*CONSTCOND*/ 0)
 
 
 #define YYTERROR       1
@@ -573,7 +576,7 @@ while (0)
          (Current).first_column = (Current).last_column =              \
            YYRHSLOC (Rhs, 0).last_column;                              \
        }                                                               \
-    while (0)
+    while (/*CONSTCOND*/ 0)
 #endif
 
 
@@ -613,7 +616,7 @@ while (0)
 do {                                           \
   if (yydebug)                                 \
     YYFPRINTF Args;                            \
-} while (0)
+} while (/*CONSTCOND*/ 0)
 
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)         \
 do {                                                           \
@@ -624,7 +627,7 @@ do {                                                                \
                   Type, Value]b4_location_if([, Location])[);  \
       YYFPRINTF (stderr, "\n");                                        \
     }                                                          \
-} while (0)
+} while (/*CONSTCOND*/ 0)
 
 /*------------------------------------------------------------------.
 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
@@ -645,7 +648,7 @@ do {                                                                \
 do {                                                           \
   if (yydebug)                                                 \
     yy_stack_print ((Bottom), (Top));                          \
-} while (0)
+} while (/*CONSTCOND*/ 0)
 
 
 /*------------------------------------------------.
@@ -669,7 +672,7 @@ do {                                                                \
 do {                                   \
   if (yydebug)                         \
     yy_reduce_print (Rule);            \
-} while (0)
+} while (/*CONSTCOND*/ 0)
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
@@ -1351,7 +1354,7 @@ yyerrorlab:
   /* Pacify compilers like GCC when the user code never invokes
      YYERROR and the label yyerrorlab therefore never appears in user
      code.  */
-  if (0)
+  if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
 ]b4_location_if([[  yyerror_range[0] = yylsp[1-yylen];