Fix the GPT function calling regex to allow dash in the name (#10577)

python/sglang/srt/function_call/gpt_oss_detector.py

@@ -31,7 +31,7 @@ class GptOssDetector(BaseFormatDetector):
 
         # Pattern to extract function name and JSON from tool_call event content
         self.tool_extract_pattern = re.compile(
-            r"to=([a-zA-Z_][a-zA-Z0-9_.]*)\s*<\|constrain\|>json<\|message\|>(.*?)(?:<\|call\|>|$)",
+            r"to=([a-zA-Z_][a-zA-Z0-9_.-]*)\s*<\|constrain\|>json<\|message\|>(.*?)(?:<\|call\|>|$)",
             re.DOTALL,
         )
 

sgl-router/src/tool_parser/parsers/gpt_oss_parser.rs

@@ -40,12 +40,12 @@ impl GptOssParser {
     pub fn new() -> Self {
         // Pattern for complete function calls with to= parameter
         // Handles optional <|start|>assistant prefix and whitespace after function name
-        let function_call_pattern = r"(?s)(?:<\|start\|>assistant)?<\|channel\|>commentary to=([a-zA-Z_][a-zA-Z0-9_]*(?:\.[a-zA-Z_][a-zA-Z0-9_]*)*)\s*<\|constrain\|>json<\|message\|>(.*?)<\|call\|>(?:commentary)?";
+        let function_call_pattern = r"(?s)(?:<\|start\|>assistant)?<\|channel\|>commentary to=([a-zA-Z_][a-zA-Z0-9_]*(?:\.[a-zA-Z_][a-zA-Z0-9_-]*)*)\s*<\|constrain\|>json<\|message\|>(.*?)<\|call\|>(?:commentary)?";
         let function_call_extractor =
             Regex::new(function_call_pattern).expect("Valid regex pattern");
 
         // Pattern for streaming function calls (incomplete)
-        let streaming_pattern = r"(?s)(?:<\|start\|>assistant)?<\|channel\|>commentary to=([a-zA-Z_][a-zA-Z0-9_]*(?:\.[a-zA-Z_][a-zA-Z0-9_]*)*)\s*<\|constrain\|>json<\|message\|>(.*)";
+        let streaming_pattern = r"(?s)(?:<\|start\|>assistant)?<\|channel\|>commentary to=([a-zA-Z_][a-zA-Z0-9_]*(?:\.[a-zA-Z_][a-zA-Z0-9_-]*)*)\s*<\|constrain\|>json<\|message\|>(.*)";
         let streaming_extractor = Regex::new(streaming_pattern).expect("Valid regex pattern");
 
         Self {