请问Perl这样写是什么意思？谁能解释一下，谢谢

yuonunix

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1^# yuonunix 发表于 2008-04-07 13:24

请问Perl这样写是什么意思？谁能解释一下，谢谢

请问Perl这样写是什么意思？谁能解释一下（下划线的文字是我加入的）

### Some constants that the user can override from the command-line
my %FMT = ('patch',    0,
         'deleted', "<",
         'inserted',  ">",
         'movedfrom', "",
         'movedto', "",
         'inserted',  ">",
         'common', "",
         'separator', "",
         'lheader', "-----",
         'rheader', "-----",
         'divider', "********************************",
         'base',    "<<<",
         'contrib', ">>>",
         'numwidth',  4,
         'reverse', 0);

=head1 NAME（这个赋值语句怎么只有等号右边的，等号左边的呢）

cdiff - perform a cleardiff which includes lines of surrounding context（难度这也是代码吗？）

=head1 SYNOPSIS（这个赋值语句怎么只有等号右边的，等号左边的呢）

cdiff [-Help] [-Debug] [-after NUMBER] [-before NUMBER] [-blank_ignore]
   [-fmt FORMAT] [-linenumbers] [-nocontext] [-noheaders] [-noprolog]
   [-pred] [-unlimited] [-tabstop NUMBER] [-output FILE] XPNAME ...

=head1 OPTIONS AND ARGUMENTS

=over 6

=item B<-Help>（这是啥意思）

Print this help message and exit.

=item B<-Version>

Print version information and exit

=item B<-Debug>

Enable debugging output.

=item B<-after> I<NUMBER>

Number of lines of context to show after a difference.

=item B<-before> I<NUMBER>

Number of lines of context to show before a difference.

=item B<-unlimited>

Show unlimited lines of context (all common lines).

=item B<-blank_ignore>

Pass the B<-blank_ignore> option to B<cleardiff(1)>.

=item B<-linenumbers>

Include line numbers (for each file) in the output.

=item B<-reflinenumbers>

.......