Add implementation of isEmpty()

Author: TysonAndre

ext/spl/spl_deque.c

@@ -458,6 +458,15 @@ PHP_METHOD(Deque, count)
 	RETURN_LONG(intern->array.size);
 }
 
+/* Returns true if there are 0 elements in this Deque. */
+PHP_METHOD(Deque, isEmpty)
+{
+	ZEND_PARSE_PARAMETERS_NONE();
+
+	const spl_deque *intern = Z_DEQUE_P(ZEND_THIS);
+	RETURN_BOOL(intern->array.size == 0);
+}
+
 /* Free elements and backing storage of this deque */
 PHP_METHOD(Deque, clear)
 {

ext/spl/spl_deque.stub.php

@@ -28,9 +28,11 @@ public function __construct(iterable $iterator = []) {}
      * use `for ($i = 0; $i < count($deque); $i++) { process($deque[$i]); }`.
      */
     public function getIterator(): InternalIterator {}
-    /** Returns the number of elements in the Deque */
+    /** Returns the number of elements in the Deque. */
     public function count(): int {}
-    /** Removes all elements from the Deque */
+    /** Returns true if there are 0 elements in the Deque. */
+    public function isEmpty(): bool {}
+    /** Removes all elements from the Deque. */
     public function clear(): void {}
 
     public function __serialize(): array {}

ext/spl/spl_deque_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: dcf42677a611cc6712ea1ad40e5730943486c305 */
+ * Stub hash: 41b3f16290517e41a55e052b96bbcf8ea65c6e8a */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_Deque___construct, 0, 0, 0)
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, iterator, IS_ITERABLE, 0, "[]")
@@ -11,6 +11,9 @@ ZEND_END_ARG_INFO()
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Deque_count, 0, 0, IS_LONG, 0)
 ZEND_END_ARG_INFO()
 
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Deque_isEmpty, 0, 0, _IS_BOOL, 0)
+ZEND_END_ARG_INFO()
+
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Deque_clear, 0, 0, IS_VOID, 0)
 ZEND_END_ARG_INFO()
 
@@ -74,6 +77,7 @@ ZEND_END_ARG_INFO()
 ZEND_METHOD(Deque, __construct);
 ZEND_METHOD(Deque, getIterator);
 ZEND_METHOD(Deque, count);
+ZEND_METHOD(Deque, isEmpty);
 ZEND_METHOD(Deque, clear);
 ZEND_METHOD(Deque, __serialize);
 ZEND_METHOD(Deque, __unserialize);
@@ -98,6 +102,7 @@ static const zend_function_entry class_Deque_methods[] = {
 	ZEND_ME(Deque, __construct, arginfo_class_Deque___construct, ZEND_ACC_PUBLIC)
 	ZEND_ME(Deque, getIterator, arginfo_class_Deque_getIterator, ZEND_ACC_PUBLIC)
 	ZEND_ME(Deque, count, arginfo_class_Deque_count, ZEND_ACC_PUBLIC)
+	ZEND_ME(Deque, isEmpty, arginfo_class_Deque_isEmpty, ZEND_ACC_PUBLIC)
 	ZEND_ME(Deque, clear, arginfo_class_Deque_clear, ZEND_ACC_PUBLIC)
 	ZEND_ME(Deque, __serialize, arginfo_class_Deque___serialize, ZEND_ACC_PUBLIC)
 	ZEND_ME(Deque, __unserialize, arginfo_class_Deque___unserialize, ZEND_ACC_PUBLIC)

ext/spl/tests/Deque/isEmpty.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Deque isEmpty()
+--FILE--
+<?php
+$it = new Deque();
+var_dump($it->isEmpty());
+$it->push(123);
+var_dump($it->isEmpty());
+$it->push('other');
+var_dump($it->isEmpty());
+?>
+--EXPECT--
+bool(true)
+bool(false)
+bool(false)