www.pudn.com > flex_bingle.rar > testxxLexer.l

	// An example of using the flex C++ scanner class. 
 
%option C++ noyywrap 
 
%{ 
int mylineno = 0; 
%} 
 
string	\"[^\n"]+\" 
 
ws	[ \t]+ 
 
alpha	[A-Za-z] 
dig	[0-9] 
name	({alpha}|{dig}|\$)({alpha}|{dig}|\_|\.|\-|\/|\$)* 
num1	[-+]?{dig}+\.?([eE][-+]?{dig}+)? 
num2	[-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)? 
number	{num1}|{num2} 
 
%% 
 
{ws}	/* skip blanks and tabs */ 
 
"/*"		{ 
		int c; 
 
		while((c = yyinput()) != 0) 
			{ 
			if(c == '\n') 
				++mylineno; 
 
			else if(c == '*') 
				{ 
				if((c = yyinput()) == '/') 
					break; 
				else 
					unput(c); 
				} 
			} 
		} 
 
{number}	cout << "number " << YYText() << '\n'; 
 
\n		mylineno++; 
 
{name}		cout << "name " << YYText() << '\n'; 
 
{string}	cout << "string " << YYText() << '\n'; 
 
%% 
 
int main( int /* argc */, char** /* argv */ ) 
	{ 
	FlexLexer* lexer = new yyFlexLexer; 
	while(lexer->yylex() != 0) 
		; 
	return 0; 
	}