fix(parser): preserve runtime class in static calls

src/CompilerBase.php

@@ -4589,7 +4589,7 @@ class CompilerBase implements PropertyAccessContext
             return $id;
         }
         if ($id === 'self') {
-            $id = $this->getNamespacedClassName($this->class);
+            $id = $this->getFullClassName();
         } elseif ($id === 'static') {
             return Symbol::getCalledClass();
         }

src/Optimizer/FuncCallOptimizer.php

@@ -731,7 +731,7 @@ trait FuncCallOptimizer
                 'Native classes do not support runtime class introspection; use `NativeClass::class`',
             );
         }
-        if ($this->isVarExpr($obj) && $this->isTypedObject($obj->name)) {
+        if ($this->isVarExpr($obj) && $this->isStableObject($obj->name)) {
             return $this->getLiteralString($this->getObjectType($obj->name));
         }
         return 'php::fn::get_class(' . $this->parseIdentifier($obj) . ')';

src/Parser/MethodCallTrait.php

@@ -830,6 +830,24 @@ trait MethodCallTrait
         return false;
     }
 
+    /**
+     * Materialize a dynamic static-call target exactly once and normalize it
+     * to the runtime class name accepted by PHP callbacks.
+     *
+     * PHP permits both an object and a class-name string before `::`. A
+     * declared object type is only an upper bound, so using it directly would
+     * lose late static binding when the runtime object is a subclass.
+     */
+    private function materializeDynamicStaticCallClassName(Expr $target): string
+    {
+        [$value, $beforeStmts, $afterStmts] = $this->parseExprWithCapturedStmts($target);
+        $this->appendCapturedStmtLinesToContext($beforeStmts);
+        $classVar = $this->addTmpVar(Type::VAR);
+        $this->context->beforeStmtLines[] = $classVar . ' = ' . $value . ';';
+        $this->appendCapturedStmtLinesToContext($afterStmts);
+
+        return '(' . $classVar . '.isObject() ? php::fn::get_class(' . $classVar . ') : php::toString(' . $classVar . '))';
+    }
 
     protected function parseStaticCall(Expr\StaticCall $expr): string
     {
@@ -850,7 +868,10 @@ trait MethodCallTrait
         $callScope = [];
         $rtFunc = '';
         $rtClass = '';
-        $class = $this->parseIdentifier($expr->class);
+        $canUseDirectCallScope = $this->isNameExpr($expr->class) && $this->isIdExpr($expr->name);
+        $class = ($this->isNameExpr($expr->class) || $this->isVarExpr($expr->class))
+            ? $this->parseIdentifier($expr->class)
+            : '';
 
         if ($this->isNameExpr($expr->class)
             && $this->isIdExpr($expr->name)
@@ -870,19 +891,28 @@ trait MethodCallTrait
             return $this->parseParentMethodCall($expr);
         }
 
-        if ($this->isVarExpr($expr->class) or $this->isVarExpr($expr->name)) {
-            $var = $class;
-            if ($this->isTypedObject($var)) {
-                $class = $this->getObjectType($var);
+        if (!$this->isNameExpr($expr->class)) {
+            if ($this->isVarExpr($expr->class) && $this->isStableObject($class)) {
+                $class = $this->getObjectType($class);
                 goto _do_call;
             }
-            if ($this->getVarType($var) == Type::OBJECT) {
-                $fn = 'php::concat({' . $var . '.getClassName(), "::", ' . $this->methodNameToStr($expr->name) . '})';
-            } else {
-                $fn = 'php::concat({' . $this->identifierToStr($expr->class) . ', "::", ' . $this->methodNameToStr($expr->name) . '})';
+            $className = $this->materializeDynamicStaticCallClassName($expr->class);
+            $fn = 'php::concat({' . $className . ', "::", ' . $this->methodNameToStr($expr->name) . '})';
+            if ($this->isVarExpr($expr->class) && $this->isIdExpr($expr->name)) {
+                $declaredClass = $this->getDeclaredObjectType($class);
+                if ($declaredClass !== '') {
+                    // Dispatch remains runtime-bound, but PHP requires an
+                    // overriding method to keep the reference signature
+                    // compatible with the declared base method.
+                    $rtFunc = $this->parseIdentifier($expr->name);
+                    $rtClass = $declaredClass;
+                }
             }
             $placeHolder = $fn;
-        } elseif ($this->isNameExpr($expr->class) and $class === 'static') {
+        } elseif ($this->isVarExpr($expr->name)) {
+            $fn = 'php::concat({' . $this->identifierToStr($expr->class) . ', "::", ' . $this->methodNameToStr($expr->name) . '})';
+            $placeHolder = $fn;
+        } elseif ($class === 'static') {
             if ($this->classDef?->nativeObject) {
                 $this->fatalError(
                     $expr,
@@ -901,15 +931,16 @@ trait MethodCallTrait
             $placeHolder = $this->genArray([Symbol::getCalledClass(), $methodPtr]);
             // 用于在按引用参数检测时解析方法签名（late static binding 在当前类层级中解析）
             $rtFunc = $method;
-            $rtClass = $this->getNamespacedClassName($this->class);
-        } elseif ($this->isNameExpr($expr->class)) {
+            $rtClass = $this->getFullClassName();
+        } else {
             if ($class === 'self') {
-                $class = $this->class;
+                $class = $this->getFullClassName();
                 $self = true;
             } elseif ($class === 'std') {
                 return $this->parseStdCall($expr);
+            } else {
+                $class = $this->getNamespacedClassName($class);
             }
-            $class = $this->getNamespacedClassName($class);
 
             _do_call:
             $method = $this->parseIdentifier($expr->name);
@@ -922,7 +953,7 @@ trait MethodCallTrait
                 );
             }
 
-            if ($this->isNameExpr($expr->class) and $this->isIdExpr($expr->name)) {
+            if ($canUseDirectCallScope) {
                 $callScope = [$this->genCharPtr($class, true), $this->genCharPtr($method)];
             }
 
@@ -963,9 +994,6 @@ trait MethodCallTrait
             // reusable handlers and never stores transient trampolines.
             $fn = $this->getLiteralString($class . '::' . $method);
             $placeHolder = $this->genArray($callScope);
-        } else {
-            $fn = 'php::concat({' . $this->identifierToStr($expr->class) . ', "::", ' . $this->methodNameToStr($expr->name) . '})';
-            $placeHolder = $fn;
         }
 
         $call = 'php::call';

tests/compiler/static/object-static-call-runtime-class.phpt

@@ -0,0 +1,126 @@
+--TEST--
+Object static calls use the runtime class rather than the declared type
+--FILE--
+<?php
+
+class ObjectStaticCallBase
+{
+    public static function identify(): string
+    {
+        return 'base';
+    }
+
+    public static function calledClass(): string
+    {
+        return static::class;
+    }
+
+    public static function increment(int &$value): string
+    {
+        $value++;
+        return static::class;
+    }
+}
+
+final class ObjectStaticCallChild extends ObjectStaticCallBase
+{
+    public static function identify(): string
+    {
+        return 'child';
+    }
+}
+
+function callOnTypedObject(ObjectStaticCallBase $object): array
+{
+    return [$object::identify(), $object::calledClass()];
+}
+
+function callOnMixedObject(mixed $object): array
+{
+    return [$object::identify(), $object::calledClass()];
+}
+
+function callOnGenericObject(object $object): array
+{
+    return [$object::identify(), $object::calledClass()];
+}
+
+function callOnExactLocalObject(): array
+{
+    $object = new ObjectStaticCallChild();
+    return [$object::identify(), $object::calledClass()];
+}
+
+function callViaGetClass(ObjectStaticCallBase $object): array
+{
+    return [get_class($object)::identify(), get_class($object)::calledClass()];
+}
+
+function callOnClassString(string $class): array
+{
+    return [$class::identify(), $class::calledClass()];
+}
+
+function callReferenceArgument(ObjectStaticCallBase $object): array
+{
+    $value = 1;
+    $class = $object::increment($value);
+    return [$class, $value];
+}
+
+function main(): void
+{
+    $object = new ObjectStaticCallChild();
+    var_dump(callOnTypedObject($object));
+    var_dump(callOnMixedObject($object));
+    var_dump(callOnGenericObject($object));
+    var_dump(callOnExactLocalObject());
+    var_dump(callViaGetClass($object));
+    var_dump(callOnClassString(ObjectStaticCallChild::class));
+    var_dump(callReferenceArgument($object));
+}
+
+?>
+--EXPECT--
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(5) "child"
+  [1]=>
+  string(21) "ObjectStaticCallChild"
+}
+array(2) {
+  [0]=>
+  string(21) "ObjectStaticCallChild"
+  [1]=>
+  int(2)
+}

tests/compiler/trait/trait-self-static-call-cross-namespace.phpt

@@ -0,0 +1,70 @@
+--TEST--
+Trait self static calls resolve to the consuming class across namespaces
+--FILE--
+<?php
+
+namespace TraitSelfCall\Template {
+    trait Dispatch
+    {
+        public function namedCall(): string
+        {
+            return self::privateHelper();
+        }
+
+        public function dynamicCall(): string
+        {
+            $method = 'helper';
+            return self::$method();
+        }
+
+        public function selfMembers(): array
+        {
+            return [self::class, self::LABEL, self::$label];
+        }
+
+        private static function privateHelper(): string
+        {
+            return 'trait-helper';
+        }
+
+        public static function helper(): string
+        {
+            return 'trait-helper';
+        }
+    }
+}
+
+namespace TraitSelfCall\Consumer {
+    use TraitSelfCall\Template\Dispatch;
+
+    final class Example
+    {
+        use Dispatch;
+
+        private const LABEL = 'consumer-constant';
+        private static string $label = 'consumer-property';
+    }
+}
+
+namespace {
+    function main(): void
+    {
+        $object = new TraitSelfCall\Consumer\Example();
+        var_dump($object->namedCall());
+        var_dump($object->dynamicCall());
+        var_dump($object->selfMembers());
+    }
+}
+
+?>
+--EXPECT--
+string(12) "trait-helper"
+string(12) "trait-helper"
+array(3) {
+  [0]=>
+  string(30) "TraitSelfCall\Consumer\Example"
+  [1]=>
+  string(17) "consumer-constant"
+  [2]=>
+  string(17) "consumer-property"
+}