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PPI::Structure::Unknown(3) User Contributed Perl Documentation PPI::Structure::Unknown(3)


PPI::Structure::Unknown - An unknown or unresolved brace structure


  isa PPI::Structure
      isa PPI::Node
          isa PPI::Element


"PPI::Structure::Unknown" is class for braces whose type is unknown, or temporarily unknown.

It primarily exists temporarily inside the lexer. Although some types of braces can be determined immediately at opening, there are a number of different brace types that can only be correctly identified after the braces are closed.

A structure is typed as unknown during this period it is indeterminate.

A "PPI::Structure::Unknown" object should not ever make it out of the lexer without being converted to its final type. Any time you encounter this class in a PDOM tree it should be considered a bug and reported accordingly.


"PPI::Structure::Unknown" has no methods beyond those provided by the standard PPI::Structure, PPI::Node and PPI::Element methods.


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.

2024-03-22 perl v5.38.2