Kevin Ryde > App-Chart-258 > App::Chart::Sympred

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NAME ^

App::Chart::Sympred -- symbol predicate objects

SYNOPSIS ^

 use App::Chart::Sympred;
 my $sympred = App::Chart::Sympred::Suffix->new ('.AX');
 $sympred->match('FOO.AX')  # returns true

DESCRIPTION ^

A App::Chart::Sympred object represents a predicate for use on stock and commodity symbols, ie. a test of whether a symbol has a certain suffix or similar.

FUNCTIONS ^

Constructors

$sympred = App::Chart::Sympred::Equal->new ($suffix)

Return a new App::Chart::Sympred object which matches only the given symbol exactly. Eg.

    my $sympred = App::Chart::Sympred::Equal->new ('FOO.BAR')
$sympred = App::Chart::Sympred::Suffix->new ($suffix)

Return a new App::Chart::Sympred object which matches the given symbol suffix. Eg.

    my $sympred = App::Chart::Sympred::Suffix->new ('.FOO')
$sympred = App::Chart::Sympred::Prefix->new ($prefix)

Return a new App::Chart::Sympred object which matches the given symbol prefix. Eg.

    my $sympred = App::Chart::Sympred::Prefix->new ('^NZ')
$sympred = App::Chart::Sympred::Regexp->new (qr/.../)

Return a new App::Chart::Sympred object which matches the given regexp pattern. Eg.

    my $sympred = App::Chart::Sympred::Regexp->new (qr/^\^BV|\.SA$/);
$sympred = App::Chart::Sympred::Proc->new (\&proc)

Return a new App::Chart::Sympred object which calls the given proc subroutine to test for a match. Eg.

    sub my_fancy_test {
      my ($symbol) = @_;
      return (some zany test on $symbol);
    }
    my $sympred = App::Chart::Sympred::Proc->new (\&my_fancy_test);
$sympred = App::Chart::Sympred::Any->new ($pred,...)

Return a new App::Chart::Sympred object which is true if any of the given $pred predicates is true. Eg.

    my $nz = App::Chart::Sympred::Suffix->new ('.NZ')
    my $bc = App::Chart::Sympred::Suffix->new ('.BC')

    my $sympred = App::Chart::Sympred::Any->new ($nz, $bc);

Methods

$sympred->match ($symbol)

Return true if $symbol is matched by the $sympred object.

$sympred->add ($pred,...)

Add additional predicates to a App::Chart::Sympred::Any object.

App::Chart::Sympred::validate ($obj)

Check that $obj is a App::Chart::Sympred object, throw an error if not.

HOME PAGE ^

http://user42.tuxfamily.org/chart/index.html

LICENCE ^

Copyright 2007, 2008, 2009, 2010, 2013, 2015, 2016 Kevin Ryde

Chart is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Chart is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Chart; see the file COPYING. Failing that, see http://www.gnu.org/licenses/.

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