1	// An example of using the flex C++ scanner class.
2
3%option C++ noyywrap
4
5%{
6int mylineno = 0;
7%}
8
9string	\"[^\n"]+\"
10
11ws	[ \t]+
12
13alpha	[A-Za-z]
14dig	[0-9]
15name	({alpha}|{dig}|\$)({alpha}|{dig}|\_|\.|\-|\/|\$)*
16num1	[-+]?{dig}+\.?([eE][-+]?{dig}+)?
17num2	[-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)?
18number	{num1}|{num2}
19
20%%
21
22{ws}	/* skip blanks and tabs */
23
24"/*"		{
25		int c;
26
27		while((c = yyinput()) != 0)
28			{
29			if(c == '\n')
30				++mylineno;
31
32			else if(c == '*')
33				{
34				if((c = yyinput()) == '/')
35					break;
36				else
37					unput(c);
38				}
39			}
40		}
41
42{number}	cout << "number " << YYText() << '\n';
43
44\n		mylineno++;
45
46{name}		cout << "name " << YYText() << '\n';
47
48{string}	cout << "string " << YYText() << '\n';
49
50%%
51
52int main( int /* argc */, char** /* argv */ )
53	{
54	FlexLexer* lexer = new yyFlexLexer;
55	while(lexer->yylex() != 0)
56		;
57	return 0;
58	}
59