;
$parser = Parse::RecDescent-new(q(
genfile: chunk(s) /^\Z/
chunk: option | error
option: /option/i /\w+/ optarg(?) {
push @{$::option{lc $item[2]}}, $item[-2];
}
optarg: /\S+/
)) or die 'Bad grammar';
$text .= $_ while (DATA);
defined $parser-genfile($text) or die 'Bad text';
print STDERR
On Thu, 20 May 2004, [EMAIL PROTECTED] wrote:
why doesn't the question mark in the optarg(?)
below work as I expect? In the trace I see that
optarg consumes the character and then the
option rule fails, since the final is missing.
Isn't P:RD supposed to backtrack and say
ok, the
);
use Data::Dumper;
use Parse::RecDescent;
$RD_WARN = 1;
$RD_HINT = 1;
$RD_TRACE = 120;
$parser = Parse::RecDescent-new(q(
genfile: chunk(s) /^\Z/
chunk: option | error
option: /option/i /\w+/ optarg(?) {
push @{$::option{lc $item[2]}}, $item[-2];
}
optarg: /\S+/
)) or die
