src/common/parser.y

   1  %{
   2 #include "wx/setup.h"
   3 #include <string.h>
   4 #ifdef _MSC_VER
   5 #include <io.h>
   6 #endif
   7 #if defined(__GNUWIN32__) && !defined(__TWIN32__)
   8 #include <sys/unistd.h>
   9 #endif
  10
  11 #include "wx/expr.h"
  12
  13 #ifndef __EXTERN_C__
  14 #define __EXTERN_C__ 1
  15 #endif
  16
  17 #if defined(__cplusplus) || defined(__STDC__)
  18 #if defined(__cplusplus) && defined(__EXTERN_C__)
  19 extern "C" {
  20 #endif
  21 #endif
  22 int yylex(void);
  23 int yylook(void);
  24 int yywrap(void);
  25 int yyback(int *, int);
  26 void yyerror(char *);
  27
  28 /* You may need to put /DLEX_SCANNER in your makefile
  29  * if you're using LEX!
  30  */
  31 void yyoutput(int);
  32
  33 #if defined(__cplusplus) || defined(__STDC__)
  34 #if defined(__cplusplus) && defined(__EXTERN_C__)
  35 }
  36 #endif
  37 #endif
  38 %}
  39
  40 %union {
  41     char *s;
  42 /*    struct pexpr *expr; */
  43 }
  44
  45
  46 %start commands
  47
  48 %token <s> INTEGER 1
  49 %token <s> WORD 2
  50 %token <s> STRING 3
  51 %token <s> PERIOD 13
  52 %token OPEN 4
  53 %token CLOSE 5
  54 %token COMMA 6
  55 %token NEWLINE 7
  56 %token ERROR 8
  57 %token OPEN_SQUARE 9
  58 %token CLOSE_SQUARE 10
  59 %token EQUALS 11
  60 %token EXP 14
  61
  62 /* %type <expr> command expr arglist arg arg1 */
  63 %type <s> command expr arglist arg arg1
  64
  65 %%
  66
  67 commands :      /* empty */
  68         |       commands command
  69         ;
  70
  71 command :       WORD PERIOD
  72                         {process_command(proio_cons(wxmake_word($1), NULL)); free($1);}
  73         |       expr PERIOD
  74                         {process_command($1);}
  75         |       error PERIOD
  76                         {syntax_error("Unrecognized command.");}
  77         ;
  78
  79 expr    :       WORD OPEN arglist CLOSE
  80                         {$$ = proio_cons(wxmake_word($1), $3); free($1);}
  81         |       OPEN_SQUARE CLOSE_SQUARE
  82                         {$$ = proio_cons(NULL, NULL);}
  83         |       OPEN_SQUARE arglist CLOSE_SQUARE
  84                         {$$ = $2; }
  85         ;
  86
  87 arglist :
  88                         {$$ = NULL;}
  89         |       arg
  90                         {$$ = proio_cons($1, NULL);}
  91         |
  92                 arg COMMA arglist
  93                         {$$ = proio_cons($1, $3);}
  94         ;
  95
  96 arg     :       WORD EQUALS arg1
  97                         {$$ = proio_cons(wxmake_word("="), proio_cons(wxmake_word($1), proio_cons($3, NULL)));
  98                          free($1); }
  99         |       arg1
 100                         {$$ = $1; }
 101
 102 arg1    :       WORD
 103                         {$$ = wxmake_word($1); free($1);}
 104         |       STRING
 105                         {$$ = wxmake_string($1); free($1);}
 106         |       INTEGER
 107                         {$$ = wxmake_integer($1); free($1);}
 108         |       INTEGER PERIOD INTEGER
 109                         {$$ = wxmake_real($1, $3); free($1); free($3); }
 110         |       INTEGER EXP INTEGER
 111                          {$$ = wxmake_exp($1, $3); free($1); free($3); }
 112         |
 113               INTEGER PERIOD INTEGER EXP INTEGER
 114                          {$$ = wxmake_exp2($1, $3, $5); free($1); free($3);
 115                                                                   free($5); }
 116
 117         |       expr
 118                         {$$ = $1;}
 119         ;
 120
 121 %%
 122
 123 #if (defined(__WXGTK__) || defined(__WXWINE__) || defined(__WXMOTIF__)) && !defined(NO_CONFIGURE)
 124 #include "lexer.c"
 125 #else
 126 #if (defined(__MWERKS__))
 127 #include "../common/cwlex_yy.c"
 128 #else
 129 #include "../common/lex_yy.c"
 130 #endif
 131 #endif
 132
 133 /*
 134 void yyerror(s)
 135 char *s;
 136 {
 137   syntax_error(s);
 138 }
 139 */
 140
 141 /* Ansi prototype. If this doesn't work for you... uncomment
 142    the above instead.
 143  */
 144
 145 void yyerror(char *s)
 146 {
 147   syntax_error(s);
 148 }
 149
 150 /*
 151  * Unfortunately, my DOS version of FLEX
 152  * requires yywrap to be #def'ed, whereas
 153  * the UNIX flex expects a proper function.
 154  */
 155
 156 /* Not sure if __SC__ is the appropriate thing
 157  * to test
 158  */
 159
 160 #if !defined(__SC__) && !defined(__GNUWIN32__)
 161 #ifdef USE_DEFINE
 162 #ifndef yywrap
 163 #define yywrap() 1
 164 #endif
 165 #else if !defined(__alpha___) && !defined(__ultrix)
 166 int yywrap() { return 1; }
 167 #endif
 168 #endif