🐛 Fix evaluateUnaryExpression Unknown argument type: UndefinedValue

Sources/Runtime.swift

@@ -557,11 +557,7 @@ struct Interpreter {
 
         switch node.operation.value {
         case "not":
-            if let argument = argument as? BooleanValue {
-                return BooleanValue(value: !argument.value)
-            }
-
-            throw JinjaError.syntaxError("Unknown argument type: \(type(of:node.argument))")
+            return BooleanValue(value: !argument.bool())
         default:
             throw JinjaError.syntaxError("Unknown operator: \(node.operation.value)")
         }

Tests/ChatTemplateTests.swift

@@ -216,13 +216,22 @@ final class ChatTemplateTests: XCTestCase {
             target:
                 "<start_of_turn>user\nHello, how are you?<end_of_turn>\n<start_of_turn>model\nI\'m doing great. How can I help you today?<end_of_turn>\n<start_of_turn>user\nI\'d like to show off how chat templating works!<end_of_turn>\n"
         ),
+        // Qwen/Qwen2.5-0.5B-Instruct
+        Test(
+            chatTemplate:
+                "{%- if tools %}\n    {{- '<|im_start|>system\\n' }}\n    {%- if messages[0]['role'] == 'system' %}\n        {{- messages[0]['content'] }}\n    {%- else %}\n        {{- 'You are Qwen, created by Alibaba Cloud. You are a helpful assistant.' }}\n    {%- endif %}\n    {{- \"\\n\\n# Tools\\n\\nYou may call one or more functions to assist with the user query.\\n\\nYou are provided with function signatures within <tools></tools> XML tags:\\n<tools>\" }}\n    {%- for tool in tools %}\n        {{- \"\\n\" }}\n        {{- tool | tojson }}\n    {%- endfor %}\n    {{- \"\\n</tools>\\n\\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\\n<tool_call>\\n{\\\"name\\\": <function-name>, \\\"arguments\\\": <args-json-object>}\\n</tool_call><|im_end|>\\n\" }}\n{%- else %}\n    {%- if messages[0]['role'] == 'system' %}\n        {{- '<|im_start|>system\\n' + messages[0]['content'] + '<|im_end|>\\n' }}\n    {%- else %}\n        {{- '<|im_start|>system\\nYou are Qwen, created by Alibaba Cloud. You are a helpful assistant.<|im_end|>\\n' }}\n    {%- endif %}\n{%- endif %}\n{%- for message in messages %}\n    {%- if (message.role == \"user\") or (message.role == \"system\" and not loop.first) or (message.role == \"assistant\" and not message.tool_calls) %}\n        {{- '<|im_start|>' + message.role + '\\n' + message.content + '<|im_end|>' + '\\n' }}\n    {%- elif message.role == \"assistant\" %}\n        {{- '<|im_start|>' + message.role }}\n        {%- if message.content %}\n            {{- '\\n' + message.content }}\n        {%- endif %}\n        {%- for tool_call in message.tool_calls %}\n            {%- if tool_call.function is defined %}\n                {%- set tool_call = tool_call.function %}\n            {%- endif %}\n            {{- '\\n<tool_call>\\n{\"name\": \"' }}\n            {{- tool_call.name }}\n            {{- '\", \"arguments\": ' }}\n            {{- tool_call.arguments | tojson }}\n            {{- '}\\n</tool_call>' }}\n        {%- endfor %}\n        {{- '<|im_end|>\\n' }}\n    {%- elif message.role == \"tool\" %}\n        {%- if (loop.index0 == 0) or (messages[loop.index0 - 1].role != \"tool\") %}\n            {{- '<|im_start|>user' }}\n        {%- endif %}\n        {{- '\\n<tool_response>\\n' }}\n        {{- message.content }}\n        {{- '\\n</tool_response>' }}\n        {%- if loop.last or (messages[loop.index0 + 1].role != \"tool\") %}\n            {{- '<|im_end|>\\n' }}\n        {%- endif %}\n    {%- endif %}\n{%- endfor %}\n{%- if add_generation_prompt %}\n    {{- '<|im_start|>assistant\\n' }}\n{%- endif %}\n",
+            data: [
+                "messages": messages
+            ],
+            target:
+                "<|im_start|>system\nYou are Qwen, created by Alibaba Cloud. You are a helpful assistant.<|im_end|>\n<|im_start|>user\nHello, how are you?<|im_end|>\n<|im_start|>assistant\nI\'m doing great. How can I help you today?<|im_end|>\n<|im_start|>user\nI\'d like to show off how chat templating works!<|im_end|>\n"
+        ),
     ]
 
     func testDefaultTemplates() throws {
         for test in defaultTemplates {
             let template = try Template(test.chatTemplate)
             let result = try template.render(test.data)
-
             XCTAssertEqual(result.debugDescription, test.target.debugDescription)
         }
     }