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All the Perl that's Practical to Extract and Report

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Apocalypse 5 on Regular Expressions Posted 2 Comments More | Login | Reply /

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  • Use of // (Score:1)

    by swiftone (478) on 2002.06.05 15:39 (#9213)
    Okay, so Page 9 [perl.com] says that // is no longer a m//, but instead a short form of rx//.

    It also talks about delayed evaluation of the pattern.

    So, given that almost all the example patterns use /foo/ and not m/foo/, what is happening, and when is it happening?

    • So, given that almost all the example patterns use /foo/ and not m/foo/, what is
      happening, and when is it happening?

      /.../ now *always* returns a regex object.
      But a regex object in a void, boolean, string, numeric, or =~ context
      immediately matches against the current topic.

      So you get:

          /pattern/;                 # void context    -> automatch
          if /pattern/ {...}         # boolean context -> au

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