Add SRT json decode example (sgl-project#2)

Author: hnyls2002

python/pyproject.toml

@@ -19,7 +19,7 @@ dependencies = [
 
 [project.optional-dependencies]
 srt = ["fastapi", "psutil", "rpyc", "torch", "uvloop", "uvicorn", "zmq", "vllm>=0.2.5",
-       "interegular", "lark"]
+       "interegular", "lark", "numba"]
 openai = ["openai>=1.0"]
 anthropic = ["anthropic"]
 all = ["sglang[srt]", "sglang[openai]", "sglang[anthropic]"]

python/sglang/lang/ir.py

@@ -6,6 +6,11 @@
 
 from sglang.global_config import global_config
 
+REGEX_INT = r"[-+]?[0-9]+"
+REGEX_FLOAT = r"[-+]?[0-9]*\.?[0-9]+"
+REGEX_BOOL = r"(True|False)"
+REGEX_STRING = r"\"[\w\d\s]*\""  # bugs with regex r"\".*\"" in interegular pkg
+
 
 @dataclasses.dataclass
 class SamplingParams:

python/sglang/test/test_programs.py

@@ -102,6 +102,29 @@ def decode_int(s):
     assert int(ret["days"]) == 365, ret.text
 
 
+def test_decode_json_regex():
+    @sgl.function
+    def decode_json(s):
+        from sglang.lang.ir import REGEX_FLOAT, REGEX_INT, REGEX_STRING
+
+        s += "Generate a JSON object to describe the basic information of a city.\n"
+
+        with s.var_scope("json_output"):
+            s += "{\n"
+            s += '  "name": ' + sgl.gen(regex=REGEX_STRING + ",") + "\n"
+            s += '  "population": ' + sgl.gen(regex=REGEX_INT + ",") + "\n"
+            s += '  "area": ' + sgl.gen(regex=REGEX_INT + ",") + "\n"
+            s += '  "latitude": ' + sgl.gen(regex=REGEX_FLOAT + ",") + "\n"
+            s += '  "country": ' + sgl.gen(regex=REGEX_STRING + ",") + "\n"
+            s += '  "timezone": ' + sgl.gen(regex=REGEX_STRING) + "\n"
+            s += "}"
+
+    ret = decode_json.run()
+    js_obj = json.loads(ret["json_output"])
+    assert isinstance(js_obj["name"], str)
+    assert isinstance(js_obj["population"], int)
+
+
 def test_decode_json():
     @sgl.function
     def decode_json(s):

test/lang/test_srt_backend.py

@@ -6,7 +6,7 @@
 
 from sglang.test.test_programs import (
     test_decode_int,
-    test_decode_json,
+    test_decode_json_regex,
     test_expert_answer,
     test_few_shot_qa,
     test_mt_bench,
@@ -44,6 +44,9 @@ def test_select(self):
     def test_decode_int(self):
         test_decode_int()
 
+    def test_decode_json_regex(self):
+        test_decode_json_regex()
+
     def test_expert_answer(self):
         test_expert_answer()