1Attean::Expression(3) User Contributed Perl DocumentationAttean::Expression(3)
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NAME

6       Attean::Expression - SPARQL Expressions
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VERSION

9       This document describes Attean::Expression version 0.025
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SYNOPSIS

12         use v5.14;
13         use Attean;
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15         my $binding = Attean::Result->new();
16         my $value = Attean::ValueExpression->new( value => Attean::Literal->integer(2) );
17         my $plus = Attean::BinaryExpression->new( children => [$value, $value], operator => '+' );
18         my $result = $plus->evaluate($binding);
19         say $result->numeric_value; # 4
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DESCRIPTION

22       This is a utility package that defines all the Attean SPARQL expression
23       classes consisting of logical, numeric, and function operators,
24       constant terms, and variables. Expressions may be evaluated in the
25       context of a Attean::API::Result object, and either return a
26       Attean::API::Term object or throw a type error exception.
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28       The expression classes are:
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30       ·   Attean::ValueExpression
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32       ·   Attean::UnaryExpression
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34       ·   Attean::BinaryExpression
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36       ·   Attean::FunctionExpression
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BUGS

39       Please report any bugs or feature requests to through the GitHub web
40       interface at <https://github.com/kasei/attean/issues>.
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SEE ALSO

AUTHOR
44       Gregory Todd Williams  "<gwilliams@cpan.org>"
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47       Copyright (c) 2014--2019 Gregory Todd Williams.  This program is free
48       software; you can redistribute it and/or modify it under the same terms
49       as Perl itself.
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53perl v5.30.0                      2019-10-31             Attean::Expression(3)



        

    


            
        

        

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