From 1128fb06c822daa7e0a1d24ad8556e35a36bb949 Mon Sep 17 00:00:00 2001 From: tianfenghan Date: Sun, 19 Jul 2026 11:15:56 +0800 Subject: [PATCH] fix(compiler): preserve ref snapshot evaluation order --- src/CompilerBase.php | 17 +++------- .../dynamic-return-reference-argument.phpt | 34 +++++++++++++++++++ 2 files changed, 39 insertions(+), 12 deletions(-) diff --git a/src/CompilerBase.php b/src/CompilerBase.php index 5888454c..e92ffb80 100644 --- a/src/CompilerBase.php +++ b/src/CompilerBase.php @@ -1067,23 +1067,16 @@ class CompilerBase implements PropertyAccessContext } /** - * 把一个"按引用返回"的调用在按值消费处解引用为值快照。 - * - * 返回引用的调用会产生一个指向被调用方存储的活引用。当该调用被按值消费 - * (例如作为按值函数参数、数组元素、按值返回等会触发 PHP 分离语义的上下文) - * 时,PHP 会在求值那一刻拷贝出值的快照,因此之后对别名存储的修改不应再可见。 - * 我们通过把结果赋值给一个临时 php::Var 来分离引用(普通的 Var 赋值会断开 - * 引用,而 php::Variant(php::Ref) 构造会保留引用),从而保留从左到右的求值顺序。 - * - * 注意:二元/一元运算等操作数上下文应保持引用活动、在运算时读值,不应在此快照; - * 那些上下文由各自的解析器直接保留引用。 + * Snapshot a reference-returning call before a by-value container can retain + * its php::Ref. Assigning to an existing Var detaches the reference, unlike + * constructing a Variant directly from Ref. Keep the assignment inline so + * earlier arguments or array elements retain PHP's evaluation order. */ protected function materializeRefReturnAsValue(NodeAbstract $value, string $expr): string { if ($value instanceof Expr\CallLike && $this->resolveRefReturningCall($value) !== false) { $tmpVar = $this->addTmpVar(Type::VAR); - $this->context->beforeStmtLines[] = $tmpVar . ' = ' . $expr . ';'; - return $tmpVar; + return '(' . $tmpVar . ' = ' . $expr . ')'; } return $expr; } diff --git a/tests/compiler/ref/dynamic-return-reference-argument.phpt b/tests/compiler/ref/dynamic-return-reference-argument.phpt index 471881ef..aede4d2a 100644 --- a/tests/compiler/ref/dynamic-return-reference-argument.phpt +++ b/tests/compiler/ref/dynamic-return-reference-argument.phpt @@ -14,6 +14,9 @@ function main() var_dump($v1, $v2); var_dump(test1(), test2()); var_dump([test1(), test2()]); + var_dump(['first' => test1(), test2()]); + var_dump(value_order('arg-left'), ref_order('arg-ref')); + var_dump([value_order('array-left'), ref_order('array-ref')]); } function &test1() @@ -28,6 +31,19 @@ function &test2() ++$value; return $value; } + +function value_order(string $label): string +{ + echo "$label\n"; + return $label; +} + +function &ref_order(string $label) +{ + static $value = 42; + echo "$label\n"; + return $value; +} ?> --EXPECT-- int(1) @@ -44,3 +60,21 @@ array(2) { [1]=> int(4) } +array(2) { + ["first"]=> + int(5) + [0]=> + int(6) +} +arg-left +arg-ref +string(8) "arg-left" +int(42) +array-left +array-ref +array(2) { + [0]=> + string(10) "array-left" + [1]=> + int(42) +}