Fix IndexError for line and keyword split (#261)

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.37.3
+    rev: v2.38.2
     hooks:
       - id: pyupgrade
         args: ["--py37-plus"]

pyproject.toml

@@ -17,7 +17,7 @@ authors = [{ name = "Bernát Gábor", email = "gaborjbernat@gmail.com" }]
 maintainers = [{ name = "Bernát Gábor", email = "gaborjbernat@gmail.com" }]
 requires-python = ">=3.7"
 dependencies = ["Sphinx>=5.2.1"]
-optional-dependencies.docs = ["furo>=2022.9.15", "sphinx>=5.2.1", "sphinx-autodoc-typehints>=1.19.2"]
+optional-dependencies.docs = ["furo>=2022.9.15", "sphinx>=5.2.1", "sphinx-autodoc-typehints>=1.19.3"]
 optional-dependencies.testing = [
   "covdefaults>=2.2",
   "coverage>=6.4.4",

src/sphinx_autodoc_typehints/__init__.py

@@ -519,6 +519,8 @@ def _get_sphinx_line_keyword_and_argument(line: str) -> tuple[str, str | None] |
 
     split_directive_and_name = param_line_without_description[1].split(maxsplit=1)  # noqa: SC200
     if len(split_directive_and_name) != 2:
+        if not len(split_directive_and_name):
+            return None
         return (split_directive_and_name[0], None)
 
     return tuple(split_directive_and_name)  # type: ignore

tests/roots/test-dummy/dummy_module.py

@@ -130,6 +130,10 @@ def function_with_starred_documentation_param_names(*args: int, **kwargs: str):
     r"""
     Function docstring.
 
+    Usage::
+
+        print(1)
+
     :param \*args: foo
     :param \**kwargs: bar
     """

tests/test_sphinx_autodoc_typehints.py

@@ -623,6 +623,10 @@ class InnerClass
 
            Function docstring.
 
+           Usage:
+
+              print(1)
+
            Parameters:
               * ***args** ("int") -- foo