composer update

vendor/symfony/console/Question/Question.php

@@ -25,7 +25,7 @@ class Question
     private $attempts;
     private $hidden = false;
     private $hiddenFallback = true;
-    private $autocompleterValues;
+    private $autocompleterCallback;
     private $validator;
     private $default;
     private $normalizer;
@@ -81,7 +81,7 @@ class Question
      */
     public function setHidden($hidden)
     {
-        if ($this->autocompleterValues) {
+        if ($this->autocompleterCallback) {
             throw new LogicException('A hidden question cannot use the autocompleter.');
         }
 
@@ -121,7 +121,9 @@ class Question
      */
     public function getAutocompleterValues()
     {
-        return $this->autocompleterValues;
+        $callback = $this->getAutocompleterCallback();
+
+        return $callback ? $callback('') : null;
     }
 
     /**
@@ -138,17 +140,46 @@ class Question
     {
         if (\is_array($values)) {
             $values = $this->isAssoc($values) ? array_merge(array_keys($values), array_values($values)) : array_values($values);
-        }
 
-        if (null !== $values && !\is_array($values) && !$values instanceof \Traversable) {
+            $callback = static function () use ($values) {
+                return $values;
+            };
+        } elseif ($values instanceof \Traversable) {
+            $valueCache = null;
+            $callback = static function () use ($values, &$valueCache) {
+                return $valueCache ?? $valueCache = iterator_to_array($values, false);
+            };
+        } elseif (null === $values) {
+            $callback = null;
+        } else {
             throw new InvalidArgumentException('Autocompleter values can be either an array, "null" or a "Traversable" object.');
         }
 
-        if ($this->hidden) {
+        return $this->setAutocompleterCallback($callback);
+    }
+
+    /**
+     * Gets the callback function used for the autocompleter.
+     */
+    public function getAutocompleterCallback(): ?callable
+    {
+        return $this->autocompleterCallback;
+    }
+
+    /**
+     * Sets the callback function used for the autocompleter.
+     *
+     * The callback is passed the user input as argument and should return an iterable of corresponding suggestions.
+     *
+     * @return $this
+     */
+    public function setAutocompleterCallback(callable $callback = null): self
+    {
+        if ($this->hidden && null !== $callback) {
             throw new LogicException('A hidden question cannot use the autocompleter.');
         }
 
-        $this->autocompleterValues = $values;
+        $this->autocompleterCallback = $callback;
 
         return $this;
     }