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Variable.php
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Variable.php
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<?php
/**
* @private
*/
class Less_Tree_Variable extends Less_Tree {
public $name;
public $index;
public $currentFileInfo;
public $evaluating = false;
/**
* @param string $name
*/
public function __construct( $name, $index = null, $currentFileInfo = null ) {
$this->name = $name;
$this->index = $index;
$this->currentFileInfo = $currentFileInfo;
}
/**
* @param Less_Environment $env
* @return Less_Tree|Less_Tree_Keyword|Less_Tree_Quoted
* @see less-3.13.1.js#Variable.prototype.eval
*/
public function compile( $env ) {
// Optimization: Less.js checks if string starts with @@, we only check if second char is @
if ( $this->name[1] === '@' ) {
$v = new self( substr( $this->name, 1 ), $this->index + 1, $this->currentFileInfo );
// While some Less_Tree nodes have no 'value', we know these can't occur after a
// variable assignment (would have been a ParseError).
$name = '@' . $v->compile( $env )->value;
} else {
$name = $this->name;
}
if ( $this->evaluating ) {
throw new Less_Exception_Compiler( "Recursive variable definition for " . $name, null, $this->index, $this->currentFileInfo );
}
$this->evaluating = true;
$variable = null;
foreach ( $env->frames as $frame ) {
/** @var Less_Tree_Ruleset $frame */
$v = $frame->variable( $name );
if ( $v ) {
if ( isset( $v->important ) && $v->important ) {
$importantScopeLength = count( $env->importantScope );
$env->importantScope[ $importantScopeLength - 1 ]['important'] = $v->important;
}
// If in calc, wrap vars in a function call to cascade evaluate args first
if ( $env->inCalc ) {
$call = new Less_Tree_Call( '_SELF', [ $v->value ], $this->index, $this->currentFileInfo );
$variable = $call->compile( $env );
break;
} else {
$variable = $v->value->compile( $env );
break;
}
}
}
if ( $variable ) {
$this->evaluating = false;
return $variable;
}
throw new Less_Exception_Compiler( "variable " . $name . " is undefined in file " . $this->currentFileInfo["filename"], null, $this->index, $this->currentFileInfo );
}
}

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Sat, May 16, 19:27 (5 h, 18 m)
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53/31/e95f047fa285c3dd4863a95bb3c4
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Variable.php (2 KB)

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