src/ExprIntrp/ExprIntrp.lex

   1 %option yywrap
   2 %{
   3 #include <ExprIntrp.tab.h>
   4 #define YY_SKIP_YYWRAP
   5
   6 static YY_BUFFER_STATE ExprIntrp_bufstring;
   7
   8 void ExprIntrp_SetResult();
   9 void ExprIntrp_SetDegree();
  10
  11 void ExprIntrp_start_string(char* str)
  12 {
  13   ExprIntrp_bufstring = ExprIntrp_scan_string(str);
  14 }
  15
  16 void ExprIntrp_stop_string()
  17 {
  18   ExprIntrp_delete_buffer(ExprIntrp_bufstring);
  19 }
  20
  21 int yywrap()
  22 {
  23   return 1;
  24 }
  25
  26 %}
  27 %%
  28 " "             {;}
  29 "+"             {return(SUMOP) ;}
  30 "-"             {return(MINUSOP) ;}
  31 "/"             {return(DIVIDEOP) ;}
  32 "^"             {return(EXPOP) ;}
  33 "**"            {return(EXPOP) ;}
  34 "*"             {return(MULTOP) ;}
  35 "("             {return(PARENTHESIS);}
  36 "["             {return(BRACKET);}
  37 ")"             {return(ENDPARENTHESIS);}
  38 "]"             {return(ENDBRACKET);}
  39 ","             {return(COMMA);}
  40 "@"             {return(DIFFERENTIAL);}
  41 "<-"            {return(ASSIGNOP);}
  42 "="             {return(EQUALOP);}
  43 "Deassign"      {return(DEASSIGNKEY);}
  44 "Deriv"         {return(DERIVKEY);}
  45 "Const"         {return(CONSTKEY);}
  46 "Sum"           {return(SUMKEY);}
  47 "Prod"          {return(PRODKEY);}
  48 [0-9.]+e[+|-]?[0-9]+ {ExprIntrp_SetResult(); return(VALUE);}
  49 [0-9.]+         {ExprIntrp_SetResult(); return(VALUE);}
  50 [a-zA-Z][a-zA-Z0-9_]*   {ExprIntrp_SetResult(); return(IDENTIFIER);}
  51 ";"             {return(RELSEPARATOR);}
  52 "'"+            {ExprIntrp_SetDegree();return(DERIVATE);}