gh-104050: Annotate toplevel functions in clinic.py (#106435)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Author: erlend-aasland

Tools/clinic/clinic.py

@@ -575,7 +575,7 @@ def permute_optional_groups(left, required, right):
     return tuple(accumulator)
 
 
-def strip_leading_and_trailing_blank_lines(s):
+def strip_leading_and_trailing_blank_lines(s: str) -> str:
     lines = s.rstrip().split('\n')
     while lines:
         line = lines[0]
@@ -585,7 +585,11 @@ def strip_leading_and_trailing_blank_lines(s):
     return '\n'.join(lines)
 
 @functools.lru_cache()
-def normalize_snippet(s, *, indent=0):
+def normalize_snippet(
+        s: str,
+        *,
+        indent: int = 0
+) -> str:
     """
     Reformats s:
         * removes leading and trailing blank lines
@@ -599,7 +603,11 @@ def normalize_snippet(s, *, indent=0):
     return s
 
 
-def declare_parser(f, *, hasformat=False):
+def declare_parser(
+        f: Function,
+        *,
+        hasformat: bool = False
+) -> str:
     """
     Generates the code template for a static local PyArg_Parser variable,
     with an initializer.  For core code (incl. builtin modules) the
@@ -658,7 +666,10 @@ def declare_parser(f, *, hasformat=False):
     return normalize_snippet(declarations)
 
 
-def wrap_declarations(text, length=78):
+def wrap_declarations(
+        text: str,
+        length: int = 78
+) -> str:
     """
     A simple-minded text wrapper for C function declarations.
 
@@ -680,14 +691,14 @@ def wrap_declarations(text, length=78):
         if not after_l_paren:
             lines.append(line)
             continue
-        parameters, _, after_r_paren = after_l_paren.partition(')')
+        in_paren, _, after_r_paren = after_l_paren.partition(')')
         if not _:
             lines.append(line)
             continue
-        if ',' not in parameters:
+        if ',' not in in_paren:
             lines.append(line)
             continue
-        parameters = [x.strip() + ", " for x in parameters.split(',')]
+        parameters = [x.strip() + ", " for x in in_paren.split(',')]
         prefix += "("
         if len(prefix) < length:
             spaces = " " * len(prefix)
@@ -1589,7 +1600,12 @@ def OverrideStdioWith(stdout):
         sys.stdout = saved_stdout
 
 
-def create_regex(before, after, word=True, whole_line=True):
+def create_regex(
+        before: str,
+        after: str,
+        word: bool = True,
+        whole_line: bool = True
+) -> re.Pattern[str]:
     """Create an re object for matching marker lines."""
     group_re = r"\w+" if word else ".+"
     pattern = r'{}({}){}'
@@ -1985,7 +2001,7 @@ def file_changed(filename: str, new_contents: str) -> bool:
         return True
 
 
-def write_file(filename: str, new_contents: str):
+def write_file(filename: str, new_contents: str) -> None:
     # Atomic write using a temporary file and os.replace()
     filename_new = f"{filename}.new"
     with open(filename_new, "w", encoding="utf-8") as fp:
@@ -2602,7 +2618,10 @@ def __getattribute__(self, name: str):
         fail("Stepped on a land mine, trying to access attribute " + repr(name) + ":\n" + self.__message__)
 
 
-def add_c_converter(f, name=None):
+def add_c_converter(
+        f: type[CConverter],
+        name: str | None = None
+) -> type[CConverter]:
     if not name:
         name = f.__name__
         if not name.endswith('_converter'):
@@ -2620,7 +2639,10 @@ def add_default_legacy_c_converter(cls):
         legacy_converters[cls.format_unit] = cls
     return cls
 
-def add_legacy_c_converter(format_unit, **kwargs):
+def add_legacy_c_converter(
+        format_unit: str,
+        **kwargs
+) -> Callable[[ConverterType], ConverterType]:
     """
     Adds a legacy converter.
     """
@@ -3887,7 +3909,9 @@ def parse_arg(self, argname: str, displayname: str) -> str:
         return super().parse_arg(argname, displayname)
 
 
-def correct_name_for_self(f) -> tuple[str, str]:
+def correct_name_for_self(
+        f: Function
+) -> tuple[str, str]:
     if f.kind in (CALLABLE, METHOD_INIT):
         if f.cls:
             return "PyObject *", "self"
@@ -3898,7 +3922,9 @@ def correct_name_for_self(f) -> tuple[str, str]:
         return "PyTypeObject *", "type"
     raise RuntimeError("Unhandled type of function f: " + repr(f.kind))
 
-def required_type_for_self_for_parser(f):
+def required_type_for_self_for_parser(
+        f: Function
+) -> str | None:
     type, _ = correct_name_for_self(f)
     if f.kind in (METHOD_INIT, METHOD_NEW, STATIC_METHOD, CLASS_METHOD):
         return type
@@ -4193,7 +4219,12 @@ class float_return_converter(double_return_converter):
     cast = '(double)'
 
 
-def eval_ast_expr(node, globals, *, filename='-'):
+def eval_ast_expr(
+        node: ast.expr,
+        globals: dict[str, Any],
+        *,
+        filename: str = '-'
+) -> FunctionType:
     """
     Takes an ast.Expr node.  Compiles and evaluates it.
     Returns the result of the expression.
@@ -4205,8 +4236,8 @@ def eval_ast_expr(node, globals, *, filename='-'):
     if isinstance(node, ast.Expr):
         node = node.value
 
-    node = ast.Expression(node)
-    co = compile(node, filename, 'eval')
+    expr = ast.Expression(node)
+    co = compile(expr, filename, 'eval')
     fn = FunctionType(co, globals)
     return fn()