<?php
include "../src/php/GrammarTemplate.php";
function echo_($s='')
{
echo $s . PHP_EOL;
}
echo_('GrammarTemplate.VERSION = ' . GrammarTemplate::VERSION);
echo_();
/*
i.e:
foreach "expression:terms" as "term":
foreach "term:factors" as "factor":
..
here an :EXPR template is defined which itself uses (anonymous) sub-templates
it is equivalent to (expand sub-templates to distinct):
<:FACTOR>:=[<lhs>[ <?op> <rhs|NULL>]]
<:TERM>:=[(<factor:FACTOR>[ AND <*factor:FACTOR>])]
<:EXPR>:=[<term:TERM>[ OR <*term:TERM>]]
<expression:EXPR>
<expression2:EXPR>
*/
$tpl = "<:EXPR>:=[<term>:=[(<factor>:=[<globalNegation:NEG><lhs>[ <?op:OP> <rhs|NULL>]][ AND <*factor>])][ OR <*term>]]<expression:EXPR>\n<expression2:EXPR>";
function op_func( $val )
{
return '!=' === $val ? '<>' : $val;
}
function neg_func( $val )
{
return $val ? 'NOT ' : '';
}
$expr = new GrammarTemplate($tpl);
GrammarTemplate::$fnGlobal['NEG'] = 'neg_func';
$expr->fn['OP'] = 'op_func';
echo_("input template:");
echo_($tpl);
echo_( );
echo_("output:");
echo_($expr->render((object)array(
'globalNegation' => true,
'expression' => array(
// term
array(
// factor
(object)array('lhs'=> 1, 'op'=> '=', 'rhs'=> 1),
// factor
(object)array('lhs'=> 1, 'op'=> '=', 'rhs'=> 2),
// factor
(object)array('lhs'=> 1, 'op'=> '=', 'rhs'=> 3)
),
// term
array(
// factor
(object)array('lhs'=> 1, 'op'=> '<', 'rhs'=> 1),
// factor
(object)array('lhs'=> 1, 'op'=> '<', 'rhs'=> 2),
// factor
(object)array('lhs'=> 1, 'op'=> '<', 'rhs'=> 3)
),
// term
array(
// factor
(object)array('lhs'=> 1, 'op'=> '>', 'rhs'=> 1),
// factor
(object)array('lhs'=> 1, 'op'=> '>', 'rhs'=> 2),
// factor
(object)array('lhs'=> 1, 'op'=> '>', 'rhs'=> 3)
)
),
'expression2' => array(
// term
array(
// factor
(object)array('lhs'=> 2, 'op'=> '=', 'rhs'=> 1),
// factor
(object)array('lhs'=> 2, 'op'=> '=', 'rhs'=> 2),
// factor
(object)array('lhs'=> 2, 'op'=> '=', 'rhs'=> 3)
),
// term
array(
// factor
(object)array('lhs'=> 2, 'op'=> '<', 'rhs'=> 1),
// factor
(object)array('lhs'=> 2, 'op'=> '<', 'rhs'=> 2),
// factor
(object)array('lhs'=> 2, 'op'=> '<', 'rhs'=> 3)
),
// term
array(
// factor
(object)array('lhs'=> 2, 'op'=> '>', 'rhs'=> 1),
// factor
(object)array('lhs'=> 2, 'op'=> '>', 'rhs'=> 2),
// factor
(object)array('lhs'=> 2, 'op'=> '>', 'rhs'=> 3)
),
// term
array(
// factor
(object)array('lhs'=> 3),
// factor
(object)array('lhs'=> 3, 'op'=> '!=')
)
)
)));
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