1IO::Handle::Iterator(3pUms)er Contributed Perl DocumentatIiOo:n:Handle::Iterator(3pm)
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6 IO::Handle::Iterator - Iterator based read handle
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9 IO::Handle::Iterator->new(sub {
10 return $next_line; # or undef on eof
11 });
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14 This class lets you define a read handle with a few fallback methods
15 (like "read") using a single callback that behaves like "getline".
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17 This is similar but much simpler than:
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19 IO::Handle::Prototype::Fallback->new(
20 __read => sub { ... },
21 );
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23 The reason being that the IO::Handle::Prototype::Fallback
24 implementation will try its very best to behave correctly (i.e. respect
25 the value of $/), whereas this implementation assumes it's fine to
26 return things that aren't exactly lines from "getline", so the values
27 are just passed through.
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30 When a method that requires buffering is invoked the handle is
31 reblessed to a subclass which handles buffering.
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33 Calling "getline" again on this object will return the value of the
34 buffer and return to the normal iterator class.
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38perl v5.32.1 2021-01-27 IO::Handle::Iterator(3pm)