Re: Extend regex legibility within character classes

Why not interpolate the stuff into a variable? It can sometimes be a useful technique, but to my eye the following is more readable and obvious to people who follow.

my $valid_XML_BaseChars =
    join('',
         "\x{0041}-\x{005A}",    # Uppercase A-Z
         "\x{0100}-\x{0131}",    # Extended Latin A subset
                                 # Skipping ligatures 0132, 0133
         "\x{0134}-\x{013E}",    # Continuing Ext. Latin A
                                 # Skipping middle dots 013F, 0140
         "\x{0141}-\x{0148}",    # Finishing Ext. Latin A
         "\x{01FA}-\x{0217}",    # Extended Latin B subset
         "\x{0250}-\x{02A8}",    # IPA Extensions
        );
my $XML_BaseChar= qr/[$valid_xml_basechar]/o;
[download]

-ben

Comment on Re: Extend regex legibility within character classes Download Code

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Re: Re: Extend regex legibility within character classes by John M. Dlugosz (Monsignor) on Jun 11, 2001 at 22:06 UTC
That's what I started with, but wanted to get rid of the extra named variable. Using the @{[]} trick lets me write it in one statement. The extra variable would be less objectionable if I could hide the scope, but if the real one I'm declaring is also a "my", I can't put braces around the whole thing. It would take a third line, outside of the braces, first to declare it. —John	[reply]
Re: Re: Re: Extend regex legibility within character classes by tye (Sage) on Jun 12, 2001 at 01:25 UTC
`my $XML_BaseChar= qr/$_/ for join "", "[", # a character class... "\x{0041}-\x{005A}", # the first range "\x{0100}-\x{0131}\x{0134}-\x{013E}\x{0141}-\x{0148}", # the next r +ange "\x{01FA}-\x{0217}\x{0250}-\x{02A8}", # etc. "]"; #here's how to close it up` [download] - tye (but my friends call me "Tye")	[reply] [d/l]