CODE:

%{
	#include 
	#include 
	#include "basic_basic_bison.h"
	#pragma warning(disable:4996)

//	extern YYLTYPE yylloc;
%}


nonzero		[1-9]
digit		[[:digit:]]
wspace		[[:blank:]]
alpha		[[:alpha:]]
alnum		[[:alnum:]]
integer		({nonzero}{digit}*)|0
variable	[_[:alpha:]][_[:alnum:]]*




%%


{integer} {
	printf("found integer\n");
	/*
	next_location();
	yylloc.last_column += yyleng;
	yylval = atof(yytext);
	//*/
	return num_literal_token;
}

{variable} {
	printf("found variable\n");
	/*
	next_location();
	yylloc.last_column += yyleng;
	//*/
	return variable_token;
}


= {
	printf("found '='\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return '=';
}

\+ {
	printf("found '+'\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return '+';
}

- {
	printf("found '-'\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return '-';
}

\* {
	printf("found '*'\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return '*';
}

\/ {
	printf("found '/'\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return '/';
}

; {
	printf("found ';'\n");
	/*
	next_location();
	yylloc.last_column += 1;
	//*/
	return ';';
}


> {
	printf("finished\n");
	return 0;
}



%%


int yywrap(void)
{
	return 1;
}

CODE:

%defines

%{

#include 
#include 
#include 

//#define YYSTYPE double

void yyerror(const char* s);
int yylex(void);

%}

%token num_literal_token
%token variable_token

%%

input   : /* empty */
        | input line
{
	printf("bison:found input\n");
}
;

line	: formula ';'
		| ';'
{
	printf("bison:found line\n");
}
;

formula	: variable_token '=' formula
		| formula '+' formula
		| formula '-' formula
		| formula '*' formula
		| formula '/' formula
		| val
{
	printf("bison:found formula\n");
}
;
		
val		: num_literal_token
		| variable_token
{
	printf("bison:found val\n");
}
;


%%

#if 0
/* トークン解析関数 */
int yylex(void)
{
#if 0
  int c;

  /* 空白、タブは飛ばす */
  while((c = getchar()) == ' ' || c == '\t')
    ;
  /* 数値を切り出す */
  if(c == '.' || isdigit(c))
  {
    ungetc(c, stdin);
    scanf("%lf", &yylval);
    return NUM;
  }
  /* EOF を返す */
  if(c == EOF)
    return 0;
  /* 文字を返す */
  return c;
#endif
}
#endif

/* エラー表示関数 */
void yyerror(const char* s)
{
  printf("bison:error=> %s\n", s);
}

int main(void)
{
  /* 構文解析関数 yyparse */
  yyparse();
  getchar();
  return 0;
}