add class alias support

src/ZM/Container/AliasDefinitionSource.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ZM\Container;
+
+use DI\Definition\Definition;
+use DI\Definition\Reference;
+use DI\Definition\Source\DefinitionSource;
+
+class AliasDefinitionSource implements DefinitionSource
+{
+    public function getDefinition(string $name): ?Definition
+    {
+        if (!class_exists($name)) {
+            return null;
+        }
+        $ref = (new \ReflectionClass($name))->getName();
+        // 如果反射类名和类名不一致，说明是别名，使用类名获取定义
+        return $ref === $name ? null : new Reference($ref);
+    }
+
+    public function getDefinitions(): array
+    {
+        return [];
+    }
+}