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<?php
/**
* @private
*/
class Less_Tree_Condition extends Less_Tree {
public $op;
public $lvalue;
public $rvalue;
public $index;
public $negate;
public $type = 'Condition';
public function __construct( $op, $l, $r, $i = 0, $negate = false ) {
$this->op = trim( $op );
$this->lvalue = $l;
$this->rvalue = $r;
$this->index = $i;
$this->negate = $negate;
}
public function accept( $visitor ) {
$this->lvalue = $visitor->visitObj( $this->lvalue );
$this->rvalue = $visitor->visitObj( $this->rvalue );
}
public function compile( $env ) {
$a = $this->lvalue->compile( $env );
$b = $this->rvalue->compile( $env );
switch ( $this->op ) {
case 'and':
$result = $a && $b;
break;
case 'or':
$result = $a || $b;
break;
default:
if ( Less_Parser::is_method( $a, 'compare' ) ) {
$result = $a->compare( $b );
} elseif ( Less_Parser::is_method( $b, 'compare' ) ) {
$result = $b->compare( $a );
} else {
throw new Less_Exception_Compiler( 'Unable to perform comparison', null, $this->index );
}
switch ( $result ) {
case -1:
$result = $this->op === '<' || $this->op === '=<' || $this->op === '<=';
break;
case 0:
$result = $this->op === '=' || $this->op === '>=' || $this->op === '=<' || $this->op === '<=';
break;
case 1:
$result = $this->op === '>' || $this->op === '>=';
break;
}
break;
}
return $this->negate ? !$result : $result;
}
}
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