PPI::Token::Number.3pm

Langue: en

Autres versions - même langue

Version: 2010-05-08 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

PPI::Token::Number - Token class for a number

SYNOPSIS

   $n = 1234;       # decimal integer
   $n = 0b1110011;  # binary integer
   $n = 01234;      # octal integer
   $n = 0x1234;     # hexadecimal integer
   $n = 12.34e-56;  # exponential notation ( currently not working )

INHERITANCE

   PPI::Token::Number
   isa PPI::Token
       isa PPI::Element

DESCRIPTION

The "PPI::Token::Number" class is used for tokens that represent numbers, in the various types that Perl supports.

METHODS

base

The "base" method is provided by all of the ::Number subclasses. This is 10 for decimal, 16 for hexadecimal, 2 for binary, etc.

literal

Return the numeric value of this token.

CAVEATS

Compared to Perl, the number tokenizer is too liberal about allowing underscores anywhere. For example, the following is a syntax error in Perl, but is allowed in PPI: 
    0_b10

TO DO

- Treat v-strings as binary strings or barewords, not as ``base-256''
  numbers

- Break out decimal integers into their own subclass?

- Implement literal()

SUPPORT

See the support section in the main module.

AUTHOR

Adam Kennedy <adamk@cpan.org> Copyright 2001 - 2010 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.