bison.h

一个小巧的BASIC解释器的源代码很小可它的确做到了

typedef union {
  double fnum;          /* double number */
  int inum;             /* integer number */
  int token;            /* token of command */
  int sep;              /* number of newlines */
  char *string;         /* quoted string */
  char *symbol;         /* general symbol */
  char *digits;         /* string of digits */
  char *strsym;         /* string symbol */
} YYSTYPE;
#define	tSEP	258
#define	tEOFILE	259
#define	tFNUM	260
#define	tSYMBOL	261
#define	tSTRSYM	262
#define	tDIGITS	263
#define	tSTRING	264
#define	tFOR	265
#define	tTO	266
#define	tSTEP	267
#define	tNEXT	268
#define	tGOTO	269
#define	tGOSUB	270
#define	tLABEL	271
#define	tON	272
#define	tINTERRUPT	273
#define	tBREAK	274
#define	tCONTINUE	275
#define	tIF	276
#define	tTHEN	277
#define	tELSE	278
#define	tELSIF	279
#define	tENDIF	280
#define	tUSING	281
#define	tPRINT	282
#define	tINPUT	283
#define	tLINE	284
#define	tRETURN	285
#define	tDIM	286
#define	tEND	287
#define	tAT	288
#define	tSCREEN	289
#define	tREVERSE	290
#define	tAND	291
#define	tOR	292
#define	tNOT	293
#define	tNEQ	294
#define	tLEQ	295
#define	tGEQ	296
#define	tLTN	297
#define	tGTN	298
#define	tEQU	299
#define	tREAD	300
#define	tDATA	301
#define	tRESTORE	302
#define	tOPEN	303
#define	tCLOSE	304
#define	tORIGIN	305
#define	tWINDOW	306
#define	tDOT	307
#define	tCIRCLE	308
#define	tTEXT	309
#define	tCLEAR	310
#define	tPRINTER	311
#define	tWAIT	312
#define	tBELL	313
#define	tMAP	314
#define	tXMAP	315
#define	tYMAP	316
#define	tARROW	317
#define	tXTICK	318
#define	tYTICK	319
#define	tBOX	320
#define	tRECT	321
#define	tNEW	322
#define	tMARKER	323
#define	tCURVE	324
#define	tSIN	325
#define	tASIN	326
#define	tCOS	327
#define	tACOS	328
#define	tTAN	329
#define	tATAN	330
#define	tEXP	331
#define	tLOG	332
#define	tSQRT	333
#define	tSQR	334
#define	tMYEOF	335
#define	tABS	336
#define	tSIG	337
#define	tINT	338
#define	tFRAC	339
#define	tMOD	340
#define	tRAN	341
#define	tLEN	342
#define	tVAL	343
#define	tLEFT	344
#define	tRIGHT	345
#define	tMID	346
#define	tMIN	347
#define	tMAX	348
#define	tSTR	349
#define	tINKEY	350
#define	tCHR	351
#define	tASC	352
#define	tUPPER	353
#define	tLOWER	354
#define	tTRIM	355
#define	tLTRIM	356
#define	tRTRIM	357
#define	tINSTR	358
#define	tSYSTEM	359
#define	tSYSTEM2	360
#define	tPEEK	361
#define	tPEEK2	362
#define	tPOKE	363
#define	tDATE	364
#define	tTIME	365
#define	tTOKEN	366
#define	UMINUS	367


extern YYSTYPE yylval;