PPI::Token::Quote - String quote abstract base class


  isa PPI::Token
      isa PPI::Element


The PPI::Token::Quote class is never instantiated, and simply provides a common abstract base class for the four quote classes. In PPI, a "quote" is limited to only the quote-like things that themselves directly represent a string. (although this includes double quotes with interpolated elements inside them, note that String::InterpolatedVariables allows to extract them).

The subclasses of PPI::Token::Quote are:

'' - PPI::Token::Quote::Single
q{} - PPI::Token::Quote::Literal
"" - PPI::Token::Quote::Double
qq{} - PPI::Token::Quote::Interpolate

The names are hopefully obvious enough not to have to explain what each class is here. See their respective pages for more details.

Please note that although the here-doc does represent a literal string, it is such a nasty piece of work that in PPI it is given the honor of its own token class (PPI::Token::HereDoc).



The string method is provided by all four ::Quote classes. It won't get you the actual literal Perl value, but it will strip off the wrapping of the quotes.

  # The following all return foo from the ->string method
  qq <foo>


The literal method is provided by ::Quote::Literal and ::Quote::Single. This returns the value of the string as Perl sees it: without the quote marks and with \\ and \' resolved to \ and '.

The literal method is not implemented by ::Quote::Double or ::Quote::Interpolate yet.


See the support section in the main module.


Adam Kennedy <>


Copyright 2001 - 2011 Adam Kennedy.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.