NAME

Number::Tolerant::Type - a type of tolerance

VERSION

version 1.710

SYNOPSIS

PERL VERSION

This library should run on perls released even a long time ago. It should work on any version of perl released in the last five years.

Although it may work on older versions of perl, no guarantee is made that the minimum required version will not be increased. The version may be increased for any reason, and there is no promise that patches will be accepted to lower the minimum required perl.

METHODS

valid_args

  my @args = $type_class->valid_args(@_);

If the arguments to valid_args are valid arguments for this type of tolerance, this method returns their canonical form, suitable for passing to "construct". Otherwise this method returns false.

construct

  my $object_guts = $type_class->construct(@args);

This method is passed the output of the "valid_args" method, and should return a hashref that will become the guts of a new tolerance.

parse

  my $tolerance = $type_class->parse($string);

This method returns a new, fully constructed tolerance from the given string if the given string can be parsed into a tolerance of this type.

number_re

  my $number_re = $type_class->number_re;

This method returns the regular expression (as a qx construct) used to match number in parsed strings.

normalize_number

  my $number = $type_class->normalize_number($input);

This method will decide whether the given input is a valid number for use with Number::Tolerant and return it in a canonicalized form. Math::BigInt objects are returned intact. Strings holding numbers are also returned intact. Strings that appears to be fractions are converted to Math::BigRat objects.

Anything else is considered invalid, and the method will return false.

variable_re

  my $variable_re = $type_class->variable_re;

This method returns the regular expression (as a qr construct) used to match the variable in parsed strings.

When parsing "4 <= x <= 10" this regular expression is used to match the letter "x."

AUTHOR

Ricardo Signes <cpan@semiotic.systems>

COPYRIGHT AND LICENSE

This software is copyright (c) 2004 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm Number::Tolerant

perl -MCPAN -e shell
install Number::Tolerant