From a50198d0fef652ca052cda642d6e98a9101eb73f Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Tue, 15 Jan 2019 17:04:24 +0100
Subject: Implement ??= operator

RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator

$a ??= $b is $a ?? ($a = $b), with the difference that $a is only
evaluated once, to the degree that this is possible. In particular
in $a[foo()] ?? $b function foo() is only ever called once.
However, the variable access themselves will be reevaluated.
---
 Zend/zend_ast.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'Zend/zend_ast.h')

diff --git a/Zend/zend_ast.h b/Zend/zend_ast.h
index 9600b801ca..5716296bbd 100644
--- a/Zend/zend_ast.h
+++ b/Zend/zend_ast.h
@@ -120,6 +120,7 @@ enum _zend_ast_kind {
 	ZEND_AST_INSTANCEOF,
 	ZEND_AST_YIELD,
 	ZEND_AST_COALESCE,
+	ZEND_AST_ASSIGN_COALESCE,
 
 	ZEND_AST_STATIC,
 	ZEND_AST_WHILE,
-- 
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