提交的内容

vendor/composer/pcre/src/PcreException.php

@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * This file is part of composer/pcre.
+ *
+ * (c) Composer <https://github.com/composer>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Composer\Pcre;
+
+class PcreException extends \RuntimeException
+{
+    /**
+     * @param  string $function
+     * @param  string|string[] $pattern
+     * @return self
+     */
+    public static function fromFunction($function, $pattern)
+    {
+        $code = preg_last_error();
+
+        if (is_array($pattern)) {
+            $pattern = implode(', ', $pattern);
+        }
+
+        return new PcreException($function.'(): failed executing "'.$pattern.'": '.self::pcreLastErrorMessage($code), $code);
+    }
+
+    /**
+     * @param  int $code
+     * @return string
+     */
+    private static function pcreLastErrorMessage($code)
+    {
+        if (function_exists('preg_last_error_msg')) {
+            return preg_last_error_msg();
+        }
+
+        $constants = get_defined_constants(true);
+        if (!isset($constants['pcre']) || !is_array($constants['pcre'])) {
+            return 'UNDEFINED_ERROR';
+        }
+
+        foreach ($constants['pcre'] as $const => $val) {
+            if ($val === $code && substr($const, -6) === '_ERROR') {
+                return $const;
+            }
+        }
+
+        return 'UNDEFINED_ERROR';
+    }
+}