ArcanistLambdaFuncFunctionXHPASTLinterRule.php
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ArcanistLambdaFuncFunctionXHPASTLinterRule.php
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	<?php

	final class ArcanistLambdaFuncFunctionXHPASTLinterRule
	extends ArcanistXHPASTLinterRule {

	const ID = 68;

	public function getLintName() {
	return pht('`%s` Function', '__lambda_func');
	}

	public function process(XHPASTNode $root) {
	$function_declarations = $root
	->selectDescendantsOfType('n_FUNCTION_DECLARATION');

	foreach ($function_declarations as $function_declaration) {
	$function_name = $function_declaration->getChildByIndex(2);

	if ($function_name->getTypeName() == 'n_EMPTY') {
	// Anonymous closure.
	continue;
	}

	if ($function_name->getConcreteString() != '__lambda_func') {
	continue;
	}

	$this->raiseLintAtNode(
	$function_declaration,
	pht(
	'Declaring a function named `%s` causes any call to %s to fail. '.
	'This is because `%s` eval-declares the function `%s`, then '.
	'modifies the symbol table so that the function is instead '.
	'named `%s`, and returns that name.',
	'__lambda_func',
	'create_function',
	'create_function',
	'__lambda_func',
	'"\0lambda_".(++$i)'));
	}
	}

	}