singletons

[Matthias Andree]

David Relson <relson at osagesoftware.com> writes:

> The lexer presently rules include the following:
>
> <INITIAL>^Message-ID:.*			;

That should be
<INITIAL>^(Resent-)?Message-ID:.*		;

> <INITIAL>^(Delivery-)?Date:.*			;
> <INITIAL>(ESMTP|SMTP)+[ \t\n]+id\ {ID}	;
> <INITIAL>[:blank:]*id\ {ID}			;
>
> The second to last has been changed (fixed) recently and the last is
> new.

Is it safe to do something like:

<INITIAL>^(In-Reply-To|References):.* { yyleng = memchr(yytext, ':',
yyleng) - yytext - 1; return TOKEN; }

or will lexer then read the remainder of the line as well because I
reduced yyleng?

-- 
Matthias Andree

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