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<?php
/**
* @private
*/
class Less_Tree_Variable extends Less_Tree {
public $name;
public $index;
public $currentFileInfo;
public $evaluating = false;
public $type = 'Variable';
/**
* @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
* @see less-2.5.3.js#Ruleset.prototype.eval
*/
public function compile( $env ) {
if ( $this->name[1] === '@' ) {
$v = new Less_Tree_Variable( substr( $this->name, 1 ), $this->index + 1, $this->currentFileInfo );
// While some Less_Tree nodes have no 'value', we know these can't ocurr after a variable
// assignment (would have been a ParseError).
// TODO: Solve better (https://phabricator.wikimedia.org/T327082).
// @phan-suppress-next-line PhanUndeclaredProperty
$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;
foreach ( $env->frames as $frame ) {
if ( $v = $frame->variable( $name ) ) {
$r = $v->value->compile( $env );
$this->evaluating = false;
return $r;
}
}
throw new Less_Exception_Compiler( "variable " . $name . " is undefined in file " . $this->currentFileInfo["filename"], null, $this->index, $this->currentFileInfo );
}
}