* src/symtab.h, src/symtab.c (symbol_t): printer and

printer_location are new members.
(symbol_printer_set): New.
* src/parse-gram.y (PERCENT_PRINTER): New token.
Handle its associated rule.
* src/scan-gram.l: Adjust.
(handle_destructor_at, handle_destructor_dollar): Rename as...
(handle_symbol_code_at, handle_symbol_code_dollar): these.
* src/output.c (symbol_printers_output): New.
(output_skeleton): Call it.
* data/bison.simple (yysymprint): New.  Cannot be named yyprint
since there are already many grammar files with a user `yyprint'.
Replace the calls to YYPRINT to calls to yysymprint.
* tests/calc.at: Adjust.
* tests/torture.at (AT_DATA_STACK_TORTURE): Remove YYPRINT: it was
taking advantage of parser very internal details (stack size!).

src/parse-gram.h

@@ -15,37 +15,38 @@
      PERCENT_NTERM = 262,
      PERCENT_TYPE = 263,
      PERCENT_DESTRUCTOR = 264,
-     PERCENT_UNION = 265,
-     PERCENT_LEFT = 266,
-     PERCENT_RIGHT = 267,
-     PERCENT_NONASSOC = 268,
-     PERCENT_EXPECT = 269,
-     PERCENT_START = 270,
-     PERCENT_PREC = 271,
-     PERCENT_VERBOSE = 272,
-     PERCENT_ERROR_VERBOSE = 273,
-     PERCENT_OUTPUT = 274,
-     PERCENT_FILE_PREFIX = 275,
-     PERCENT_NAME_PREFIX = 276,
-     PERCENT_DEFINE = 277,
-     PERCENT_PURE_PARSER = 278,
-     PERCENT_DEFINES = 279,
-     PERCENT_YACC = 280,
-     PERCENT_DEBUG = 281,
-     PERCENT_LOCATIONS = 282,
-     PERCENT_NO_LINES = 283,
-     PERCENT_SKELETON = 284,
-     PERCENT_TOKEN_TABLE = 285,
-     TYPE = 286,
-     EQUAL = 287,
-     SEMICOLON = 288,
-     COLON = 289,
-     PIPE = 290,
-     ID = 291,
-     PERCENT_PERCENT = 292,
-     PROLOGUE = 293,
-     EPILOGUE = 294,
-     BRACED_CODE = 295
+     PERCENT_PRINTER = 265,
+     PERCENT_UNION = 266,
+     PERCENT_LEFT = 267,
+     PERCENT_RIGHT = 268,
+     PERCENT_NONASSOC = 269,
+     PERCENT_EXPECT = 270,
+     PERCENT_START = 271,
+     PERCENT_PREC = 272,
+     PERCENT_VERBOSE = 273,
+     PERCENT_ERROR_VERBOSE = 274,
+     PERCENT_OUTPUT = 275,
+     PERCENT_FILE_PREFIX = 276,
+     PERCENT_NAME_PREFIX = 277,
+     PERCENT_DEFINE = 278,
+     PERCENT_PURE_PARSER = 279,
+     PERCENT_DEFINES = 280,
+     PERCENT_YACC = 281,
+     PERCENT_DEBUG = 282,
+     PERCENT_LOCATIONS = 283,
+     PERCENT_NO_LINES = 284,
+     PERCENT_SKELETON = 285,
+     PERCENT_TOKEN_TABLE = 286,
+     TYPE = 287,
+     EQUAL = 288,
+     SEMICOLON = 289,
+     COLON = 290,
+     PIPE = 291,
+     ID = 292,
+     PERCENT_PERCENT = 293,
+     PROLOGUE = 294,
+     EPILOGUE = 295,
+     BRACED_CODE = 296
    };
 # endif
   /* POSIX requires `int' for tokens in interfaces.  */
@@ -59,37 +60,38 @@
 #define PERCENT_NTERM 262
 #define PERCENT_TYPE 263
 #define PERCENT_DESTRUCTOR 264
-#define PERCENT_UNION 265
-#define PERCENT_LEFT 266
-#define PERCENT_RIGHT 267
-#define PERCENT_NONASSOC 268
-#define PERCENT_EXPECT 269
-#define PERCENT_START 270
-#define PERCENT_PREC 271
-#define PERCENT_VERBOSE 272
-#define PERCENT_ERROR_VERBOSE 273
-#define PERCENT_OUTPUT 274
-#define PERCENT_FILE_PREFIX 275
-#define PERCENT_NAME_PREFIX 276
-#define PERCENT_DEFINE 277
-#define PERCENT_PURE_PARSER 278
-#define PERCENT_DEFINES 279
-#define PERCENT_YACC 280
-#define PERCENT_DEBUG 281
-#define PERCENT_LOCATIONS 282
-#define PERCENT_NO_LINES 283
-#define PERCENT_SKELETON 284
-#define PERCENT_TOKEN_TABLE 285
-#define TYPE 286
-#define EQUAL 287
-#define SEMICOLON 288
-#define COLON 289
-#define PIPE 290
-#define ID 291
-#define PERCENT_PERCENT 292
-#define PROLOGUE 293
-#define EPILOGUE 294
-#define BRACED_CODE 295
+#define PERCENT_PRINTER 265
+#define PERCENT_UNION 266
+#define PERCENT_LEFT 267
+#define PERCENT_RIGHT 268
+#define PERCENT_NONASSOC 269
+#define PERCENT_EXPECT 270
+#define PERCENT_START 271
+#define PERCENT_PREC 272
+#define PERCENT_VERBOSE 273
+#define PERCENT_ERROR_VERBOSE 274
+#define PERCENT_OUTPUT 275
+#define PERCENT_FILE_PREFIX 276
+#define PERCENT_NAME_PREFIX 277
+#define PERCENT_DEFINE 278
+#define PERCENT_PURE_PARSER 279
+#define PERCENT_DEFINES 280
+#define PERCENT_YACC 281
+#define PERCENT_DEBUG 282
+#define PERCENT_LOCATIONS 283
+#define PERCENT_NO_LINES 284
+#define PERCENT_SKELETON 285
+#define PERCENT_TOKEN_TABLE 286
+#define TYPE 287
+#define EQUAL 288
+#define SEMICOLON 289
+#define COLON 290
+#define PIPE 291
+#define ID 292
+#define PERCENT_PERCENT 293
+#define PROLOGUE 294
+#define EPILOGUE 295
+#define BRACED_CODE 296
 
 
 
@@ -103,8 +105,8 @@ typedef union {
   char *string;
   associativity assoc;
 } yystype;
-/* Line 1271 of /usr/local/share/bison/bison.simple.  */
-#line 108 "y.tab.h"
+/* Line 1313 of /usr/local/share/bison/bison.simple.  */
+#line 110 "y.tab.h"
 # define YYSTYPE yystype
 #endif