1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/wikimedia/less.php/lib/Less/Tree/Variable.php b/vendor/wikimedia/less.php/lib/Less/Tree/Variable.php
new file mode 100644
index 0000000..dcb1823
--- /dev/null
+++ b/vendor/wikimedia/less.php/lib/Less/Tree/Variable.php
@@ -0,0 +1,56 @@
+<?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 );
+	}
+
+}