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psalm/src/Psalm/Checker/FunctionChecker.php
2016-08-15 13:37:21 -04:00

150 lines
4.9 KiB
PHP

<?php
namespace Psalm\Checker;
use PhpParser;
use Psalm\StatementsSource;
use Psalm\Config;
use Psalm\Type;
class FunctionChecker extends FunctionLikeChecker
{
protected static $function_return_types = [];
protected static $function_namespaces = [];
protected static $existing_functions = [];
protected static $deprecated_functions = [];
protected static $have_registered_function = [];
protected static $file_function_params = [];
protected static $builtin_function_params = [];
protected static $builtin_functions = [];
/**
* @param PhpParser\Node\Stmt\Function_ $function
* @param StatementsSource $source
* @param string $base_file_name
*/
public function __construct(PhpParser\Node\Stmt\Function_ $function, StatementsSource $source, $base_file_name)
{
parent::__construct($function, $source);
$this->registerFunction($function, $base_file_name);
}
public static function functionExists($function_id, $file_name)
{
if (isset(self::$existing_functions[$file_name][$function_id])) {
return true;
}
if (strpos($function_id, '::') !== false) {
$function_id = strtolower(preg_replace('/^[^:]+::/', '', $function_id));
}
if (!isset(self::$builtin_functions[$function_id])) {
self::extractReflectionInfo($function_id);
}
return self::$builtin_functions[$function_id];
}
public static function getParams($function_id, $file_name)
{
if (isset(self::$builtin_functions[$function_id]) && self::$builtin_functions[$function_id]) {
return self::$builtin_function_params[$function_id];
}
return self::$file_function_params[$file_name][$function_id];
}
protected static function extractReflectionInfo($function_id)
{
try {
$reflection_function = new \ReflectionFunction($function_id);
$reflection_params = $reflection_function->getParameters();
self::$builtin_function_params[$function_id] = [];
foreach ($reflection_params as $param) {
self::$builtin_function_params[$function_id][] = self::getReflectionParamArray($param);
}
self::$builtin_functions[$function_id] = true;
}
catch (\ReflectionException $e) {
self::$builtin_functions[$function_id] = false;
}
}
public static function getFunctionReturnTypes($function_id, $file_name)
{
if (!isset(self::$function_return_types[$file_name][$function_id])) {
throw new \InvalidArgumentException('Do not know function');
}
return self::$function_return_types[$file_name][$function_id]
? clone self::$function_return_types[$file_name][$function_id]
: null;
}
protected function registerFunction(PhpParser\Node\Stmt\Function_ $function, $file_name)
{
$function_id = strtolower($function->name);
if (isset(self::$have_registered_function[$file_name][$function_id])) {
return;
}
self::$have_registered_function[$file_name][$function_id] = true;
self::$function_namespaces[$file_name][$function_id] = $this->namespace;
self::$existing_functions[$file_name][$function_id] = true;
self::$file_function_params[$file_name][$function_id] = [];
$function_param_names = [];
foreach ($function->getParams() as $param) {
$param_array = $this->getParamArray($param);
self::$file_function_params[$file_name][$function_id][] = $param_array;
$function_param_names[$param->name] = $param_array['type'];
}
$config = Config::getInstance();
$return_type = null;
$docblock_info = CommentChecker::extractDocblockInfo($function->getDocComment());
if ($docblock_info['deprecated']) {
self::$deprecated_functions[$file_name][$function_id] = true;
}
$this->suppressed_issues = $docblock_info['suppress'];
if ($config->use_docblock_types) {
if ($docblock_info['return_type']) {
$return_type =
Type::parseString(
self::fixUpLocalType(
$docblock_info['return_type'],
null,
$this->namespace,
$this->getAliasedClasses()
)
);
}
if ($docblock_info['params']) {
$this->improveParamsFromDocblock(
$docblock_info['params'],
$function_param_names,
self::$file_function_params[$file_name][$function_id],
$function->getLine()
);
}
}
self::$function_return_types[$file_name][$function_id] = $return_type;
}
}