Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/composer/semver/src/Constraint/MultiConstraint.php

@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of composer/semver.
+ *
+ * (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\Semver\Constraint;
+
+/**
+ * Defines a conjunctive or disjunctive set of constraints.
+ */
+class MultiConstraint implements ConstraintInterface
+{
+    /** @var ConstraintInterface[] */
+    protected $constraints;
+
+    /** @var string */
+    protected $prettyString;
+
+    /** @var bool */
+    protected $conjunctive;
+
+    /**
+     * @param ConstraintInterface[] $constraints A set of constraints
+     * @param bool $conjunctive Whether the constraints should be treated as conjunctive or disjunctive
+     */
+    public function __construct(array $constraints, $conjunctive = true)
+    {
+        $this->constraints = $constraints;
+        $this->conjunctive = $conjunctive;
+    }
+
+    /**
+     * @param ConstraintInterface $provider
+     *
+     * @return bool
+     */
+    public function matches(ConstraintInterface $provider)
+    {
+        if (false === $this->conjunctive) {
+            foreach ($this->constraints as $constraint) {
+                if ($constraint->matches($provider)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        foreach ($this->constraints as $constraint) {
+            if (!$constraint->matches($provider)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @param string $prettyString
+     */
+    public function setPrettyString($prettyString)
+    {
+        $this->prettyString = $prettyString;
+    }
+
+    /**
+     * @return string
+     */
+    public function getPrettyString()
+    {
+        if ($this->prettyString) {
+            return $this->prettyString;
+        }
+
+        return $this->__toString();
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        $constraints = array();
+        foreach ($this->constraints as $constraint) {
+            $constraints[] = (string) $constraint;
+        }
+
+        return '[' . implode($this->conjunctive ? ' ' : ' || ', $constraints) . ']';
+    }
+}