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