ArcanistInstanceOfOperatorXHPASTLinterRule.php
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ArcanistInstanceOfOperatorXHPASTLinterRule.php
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	<?php

	final class ArcanistInstanceOfOperatorXHPASTLinterRule
	extends ArcanistXHPASTLinterRule {

	const ID = 69;

	public function getLintName() {
	return pht('`%s` Operator', 'instanceof');
	}

	public function process(XHPASTNode $root) {
	$expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');

	foreach ($expressions as $expression) {
	$operator = $expression->getChildOfType(1, 'n_OPERATOR');

	if (strtolower($operator->getConcreteString()) != 'instanceof') {
	continue;
	}

	$object = $expression->getChildByIndex(0);

	if ($object->isStaticScalar() \|\|
	$object->getTypeName() == 'n_SYMBOL_NAME') {
	$this->raiseLintAtNode(
	$object,
	pht(
	'`%s` expects an object instance, constant given.',
	'instanceof'));
	}
	}
	}

	}