1Attean::API::ExpressionU(s3e)r Contributed Perl DocumentaAttitoenan::API::Expression(3)
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NAME

6       Attean::API::Expression - SPARQL expressions
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VERSION

9       This document describes Attean::API::Expression version 0.022
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DESCRIPTION

12       The Attean::API::Expression role defines a common API for SPARQL
13       expressions consisting of logical, numeric, and function operators,
14       constant terms, and variables. Expressions may be evaluated in the
15       context of a Attean::API::Result object, and either return a
16       Attean::API::Term object or throw a type error exception.
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ROLES

19       This role consumes the Attean::API::DirectedAcyclicGraph role which
20       provide the following methods:
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22       "is_leaf"
23       "walk( prefix => \&pre_cb, postfix => \&pre_cb )"
24       "cover( prefix => \&pre_cb, postfix => \&pre_cb )"
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26       and the following attributes:
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28       "children"
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ATTRIBUTES

31       The following attributes exist:
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33       "operator"
34           A string indicating the expression operator (e.g. '+' or '||').
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REQUIRED METHODS

37       The following methods are required by the Attean::API::Expression role:
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39       "as_string"
40           Returns a string serialization of the expression object.
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BUGS

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

AUTHOR
48       Gregory Todd Williams  "<gwilliams@cpan.org>"
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51       Copyright (c) 2014--2019 Gregory Todd Williams.  This program is free
52       software; you can redistribute it and/or modify it under the same terms
53       as Perl itself.
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57perl v5.28.1                      2019-03-21        Attean::API::Expression(3)



        

    


            
        

        

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