feat(compiler): 支持函数别名和命名空间功能

- 实现了函数导入别名功能，解决命名冲突问题
- 添加了命名空间支持，包括嵌套命名空间解析
- 更新了函数定义实体类以支持命名空间属性
- 修改了编译器基础类中的函数解析逻辑
- 调整了扩展模板中函数注册的命名空间处理
- 优化了预处理器中的命名空间定义逻辑
- 完善了翻译器中函数包装器的命名空间支持
- 新增了函数别名查找和解析功能
- 添加了相关测试用例验证功能正确性

src/Php/CompilerBase.php

@@ -106,7 +106,6 @@ class CompilerBase extends \PhpAot\Core\Translator
     protected int $floatPrecision = 17;
     protected bool $debugInfo = true;
     protected bool $noLiteralStrings = false;
-    protected bool $useCppNamespace = false;
     protected string $file;
     protected string $dir;
 
@@ -644,7 +643,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
         $fnName = $this->parseIdentifier($v->name);
         $returnType        = $v->returnType ? $this->getTypeFromZendType($this->parseIdentifier($v->returnType)) : self::TYPE_VOID;
-        $functionDef = new FunctionDef($fnName, $returnType);
+        $functionDef = new FunctionDef($fnName, $returnType, $this->namespace);
         $this->functionDef = $functionDef;
 
         $this->parseParams($v->params, $functionDef);
@@ -1796,6 +1795,9 @@ class CompilerBase extends \PhpAot\Core\Translator
     protected function findNativeFunction(string $fname): string|false
     {
         $possibleFunctionNames = [$this->escapeName($fname)];
+        if (isset($this->useAliases[$fname])) {
+            $possibleFunctionNames[] = $this->escapeName($this->escapeNamespace($this->useAliases[$fname]));
+        }
         if ($this->namespace) {
             $possibleFunctionNames[] = $this->escapeNamespace($this->namespace) . self::NAMESPACE_SEPARATOR . $fname;
         }
@@ -3102,8 +3104,8 @@ class CompilerBase extends \PhpAot\Core\Translator
         $this->addLocalVar($exVar, self::TYPE_OBJECT);
 
         $code .= 'catch(zend_object *_ex) {' . PHP_EOL;
+        $code .= $this->getIndent() . $exVar . ' = php::catchException();' . PHP_EOL;
         if ($catches) {
-            $code .= $this->getIndent() . $exVar . ' = php::catchException();' . PHP_EOL;
             $this->indentLevel++;
             foreach ($catches as $catch) {
                 $code .= $this->parseCatch($catch, $exVar);
@@ -3111,6 +3113,7 @@ class CompilerBase extends \PhpAot\Core\Translator
             $this->indentLevel--;
         }
         $code .= '}' . PHP_EOL;
+
         if ($finally) {
             $code .= $this->parseStmts($finally->stmts);
             $code .= PHP_EOL;
@@ -3267,28 +3270,21 @@ class CompilerBase extends \PhpAot\Core\Translator
     protected function parseUse(mixed $v2): string
     {
         $code = '';
-        if ($this->useCppNamespace) {
-            foreach ($v2->uses as $use) {
-                $code .= 'using ' . str_replace('\\', '::', $use->name->toString()) . ';' . PHP_EOL;
-            }
-        } else {
-            foreach ($v2->uses as $use) {
-                $id = $this->parseIdentifier($use->name);
-                if ($use->type === Node\Stmt\Use_::TYPE_FUNCTION) {
-                    $rpos = strrpos($id, '\\');
-                    $fn   = substr($id, $rpos + 1);
-                    $ns   = substr($id, 0, $rpos);
-                    // fn => namespace
-                    $this->useFunctions[$fn] = $ns;
-                } else {
-                    $this->useNamespaces[] = $id;
-                    if ($use->alias) {
-                        $this->useAliases[$use->alias->toString()] = $id;
-                    }
+        foreach ($v2->uses as $use) {
+            $id = $this->parseIdentifier($use->name);
+            if ($use->type === Node\Stmt\Use_::TYPE_FUNCTION) {
+                $rpos = strrpos($id, '\\');
+                $fn   = substr($id, $rpos + 1);
+                $ns   = substr($id, 0, $rpos);
+                // fn => namespace
+                $this->useFunctions[$fn] = $ns;
+            } else {
+                $this->useNamespaces[] = $id;
+                if ($use->alias) {
+                    $this->useAliases[$use->alias->toString()] = $id;
                 }
             }
         }
-
         return $code;
     }
 

src/Php/Entity/FunctionDef.php

@@ -21,11 +21,18 @@ class FunctionDef
     public array $argInfoList = [];
     public int $argCountRequired = 0;
     public string $params = '';
+    public string $namespace = '';
     public bool $method = false;
 
-    public function __construct(string $name, string $returnType)
+    public function __construct(string $name, string $returnType, string $namespace = '')
     {
         $this->name       = $name;
         $this->returnType = $returnType;
+        $this->namespace  = $namespace;
+    }
+
+    public function getNamespacedName(): string
+    {
+        return $this->namespace ? $this->namespace . '\\' . $this->name : $this->name;
     }
 }

src/Php/Preprocessor.php

@@ -130,7 +130,7 @@ class Preprocessor extends CompilerBase
     protected function prepareNamespaceDef(Node\Stmt\Namespace_ $node): void
     {
         $this->resetNamespace();
-        $this->namespace = $this->parseIdentifier($node->name);
+        $this->namespace = $node->name ? $this->parseIdentifier($node->name) : '';
         foreach ($node->stmts as $v2) {
             $type2 = $v2->getType();
             switch ($type2) {

src/Php/Translator.php

@@ -587,25 +587,13 @@ class Translator extends Preprocessor
 
     protected function parseNamespace(Node\Stmt\Namespace_ $node): string
     {
-        $ns   = $this->parseIdentifier($node->name);
+        $ns   = $node->name ? $this->parseIdentifier($node->name) : '';
         $code = '';
 
         $this->resetNamespace();
 
-        if ($this->useCppNamespace) {
-            $ns = explode('\\', $ns);
-            $ns = array_filter($ns, function ($v) {
-                return $v !== '';
-            });
-            foreach ($ns as $name) {
-                $code .= 'namespace ' . $name . ' {' . PHP_EOL;
-            }
-            $ns_end          = str_repeat('}', count($ns));
-            $this->namespace = implode('::', $ns);
-        } else {
-            $this->namespace = $ns;
-            $ns_end          = '';
-        }
+        $this->namespace = $ns;
+        $ns_end          = '';
 
         foreach ($node->stmts as $v2) {
             $type2 = $v2->getType();
@@ -984,9 +972,9 @@ class Translator extends Preprocessor
 
     private function genFunctionWrapper(FunctionDef $functionDef): string
     {
-        $name    = $functionDef->name;
+        $name = $functionDef->namespace ? $functionDef->namespace . '_' . $functionDef->name : $functionDef->name;
         $cppCode = 'ZEND_FUNCTION(' . $name . '){' . PHP_EOL;
-        $fn      = self::PREFIX . $this->getNativeName($functionDef->name);
+        $fn = self::PREFIX . $this->getNativeName($functionDef->name, $functionDef->namespace);
         $cppCode .= $this->genWrapperFunctionArgs($fn, $functionDef);
 
         return $cppCode;

src/template/extension.cc.php

@@ -76,7 +76,12 @@ foreach ($this->functions as $functionDef):
         continue;
     }
 ?>
+<?php if ($functionDef->namespace): ?>
+<?php $zif_name = $functionDef->namespace . '_' . $functionDef->name; ?>
+    ZEND_NAMED_FE("<?=$this->escapeString($functionDef->getNamespacedName())?>", ZEND_FN(<?= $zif_name ?>), arginfo_<?=$zif_name?>)
+<?php else: ?>
     ZEND_FE(<?=$functionDef->name?>, arginfo_<?=$functionDef->name?>)
+<?php endif; ?>
 <?php endforeach;?>
     ZEND_FE_END
 };

tests/zend/str_offset_001.phpt

@@ -0,0 +1,38 @@
+--TEST--
+string offset 001
+--FILE--
+<?php
+// Test positive or null string offsets
+
+function foo($x) {
+    var_dump($x);
+}
+
+function main() {
+    $str = "abc";
+    var_dump($str[0]);
+    var_dump($str[1]);
+    var_dump($str[2]);
+    var_dump($str[3]);
+    var_dump($str[1][0]);
+
+    foo($str[0]);
+    foo($str[1]);
+    foo($str[2]);
+    foo($str[3]);
+    foo($str[1][0]);
+}
+
+
+?>
+--EXPECTF--
+string(1) "a"
+string(1) "b"
+string(1) "c"
+string(0) ""
+string(1) "b"
+string(1) "a"
+string(1) "b"
+string(1) "c"
+string(0) ""
+string(1) "b"

tests/zend/try/try_finally_001.phpt

@@ -0,0 +1,24 @@
+--TEST--
+Try finally (basic test)
+--FILE--
+<?php
+function foo ($a) {
+   try {
+     throw new Exception("ex");
+   } finally {
+     var_dump($a);
+   }
+}
+
+function main() {
+    foo("finally");
+}
+?>
+--EXPECTF--
+string(7) "finally"
+
+Fatal error: Uncaught Exception: ex %s
+Stack trace:
+#0 %stry_finally_001.php(%d): foo('finally')
+#1 {main}
+  thrown in %stry_finally_001.php on line %d

tests/zend/use_function/alias.phpt

@@ -0,0 +1,33 @@
+--TEST--
+aliasing imported functions to resolve naming conflicts
+--FILE--
+<?php
+
+namespace foo {
+    function baz() {
+        return 'foo.baz';
+    }
+}
+
+namespace bar {
+    function baz() {
+        return 'bar.baz';
+    }
+}
+
+namespace {
+    use function foo\baz as foo_baz,
+                 bar\baz as bar_baz;
+
+     function main() {
+        var_dump(foo_baz());
+        var_dump(bar_baz());
+        echo "Done\n";
+    }
+}
+
+?>
+--EXPECT--
+string(7) "foo.baz"
+string(7) "bar.baz"
+Done