Rename uppercase_first_letter to capitalize

Also rename `lowercase_first_letter` to `decapitalize`

PiperOrigin-RevId: 834622292
Change-Id: I1cfbda1be782ff40dd3fc0726601cc6b1f427345

wasm/codegen/generators/common.py

@@ -31,12 +31,12 @@ def write_to_file(filepath: str, content: str) -> None:
     print(f"Error writing to output file: {filepath} - {e}")
 
 
-def lowercase_first_letter(input_string: str) -> str:
+def decapitalize(input_string: str) -> str:
   """Lowercases the first letter of a string."""
   return input_string[:1].lower() + input_string[1:]
 
 
-def uppercase_first_letter(input_string: str) -> str:
+def capitalize(input_string: str) -> str:
   """Uppercases the first letter of a string."""
   return input_string[:1].upper() + input_string[1:]
 

wasm/codegen/generators/functions.py

@@ -60,9 +60,8 @@ def get_const_qualifier(func: ast_nodes.FunctionDecl) -> str:
 
 def should_be_wrapped(func: ast_nodes.FunctionDecl) -> bool:
   """Checks if a MuJoCo function needs a wrapper function."""
-  return (
-      get_pointer_return_inner_value_type(func) is not None
-      or any(get_inner_value_type(param) for param in func.parameters)
+  return get_pointer_return_inner_value_type(func) is not None or any(
+      get_inner_value_type(param) for param in func.parameters
   )
 
 
@@ -89,9 +88,7 @@ def generate_function_wrapper(func: ast_nodes.FunctionDecl) -> str:
     if bound_check_code:
       builder.line(bound_check_code)
 
-    c_params_list = get_params_string_maybe_with_conversion(
-        func.parameters
-    )
+    c_params_list = get_params_string_maybe_with_conversion(func.parameters)
     c_params_str = ", ".join(c_params_list)
     c_call = f"{func.name}({c_params_str})"
     c_statement = get_compatible_return_call(func, c_call)
@@ -146,9 +143,7 @@ def get_param_unpack_statement(
       return f"UNPACK_VALUE({inner_type.name}, {p.name});"
 
 
-def get_param_string(
-    p: ast_nodes.FunctionParameterDecl
-) -> str:
+def get_param_string(p: ast_nodes.FunctionParameterDecl) -> str:
   """Generates a list of C++ parameter declarations as strings."""
 
   if (
@@ -159,7 +154,7 @@ def get_param_string(
     # Pointer to struct parameters
     const_qualifier = "const " if p.type.inner_type.is_const else ""
     return (
-        f"{const_qualifier}{common.uppercase_first_letter(p.type.inner_type.name)}&"
+        f"{const_qualifier}{common.capitalize(p.type.inner_type.name)}&"
         f" {p.name}"
     )
   elif (
@@ -258,7 +253,7 @@ def get_compatible_return_type(func: ast_nodes.FunctionDecl) -> str:
       return "std::string"
     if inner_type.name not in constants.PRIMITIVE_TYPES:
       const_qualifier = get_const_qualifier(func)
-      return f"""{const_qualifier}std::optional<{common.uppercase_first_letter(inner_type.name)}>"""
+      return f"""{const_qualifier}std::optional<{common.capitalize(inner_type.name)}>"""
   if (
       isinstance(func.return_type, ast_nodes.ValueType)
       and func.return_type.name in constants.PRIMITIVE_TYPES
@@ -275,7 +270,7 @@ def get_converted_struct_to_class(
   const_qualifier = get_const_qualifier(func)
   return_type = cast(ast_nodes.PointerType, func.return_type)
   struct_name = cast(ast_nodes.ValueType, return_type.inner_type).name
-  class_constructor = common.uppercase_first_letter(struct_name)
+  class_constructor = common.capitalize(struct_name)
   return_str = f"{class_constructor}(result)"
   return f"""{const_qualifier}{struct_name}* result = {invoker};
   if (result == nullptr) {{

wasm/codegen/generators/structs.py

@@ -93,7 +93,7 @@ def _generate_field_data(
   """Generates the C++ definition and binding code for the struct field."""
   f = field
   w = struct_wrapper_name
-  s = common.lowercase_first_letter(w)
+  s = common.decapitalize(w)
 
   if f.name in constants.MANUAL_FIELDS.get(w, []):
     # Note: Manually handled MjModel fields are special cased so that a
@@ -130,7 +130,7 @@ def _generate_field_data(
 
   elif isinstance(f.type, ast_nodes.ValueType) and f.type.name.startswith("mj"):
     return WrappedFieldData(
-        definition=f"{common.uppercase_first_letter(f.type.name)} {f.name};",
+        definition=f"{common.capitalize(f.type.name)} {f.name};",
         typename=_get_field_struct_type(f.type),
         binding=_simple_property_binding(f, w, setter=False, reference=True),
         ptr_initialization=f"{f.name}(&ptr_->{f.name})",
@@ -156,9 +156,7 @@ def _generate_field_data(
       return WrappedFieldData(
           binding=_simple_property_binding(f, w, setter=False, reference=True),
           typename=anonymous_struct_name,
-          definition=(
-              f"{common.uppercase_first_letter(anonymous_struct_name)} {f.name};"
-          ),
+          definition=f"{common.capitalize(anonymous_struct_name)} {f.name};",
           ptr_initialization=f"{f.name}(&ptr_->{f.name})",
           ptr_copy_reset=f"{f.name}.set(&ptr_->{f.name});",
           is_primitive_or_fixed_size=True,
@@ -201,8 +199,7 @@ def _generate_field_data(
     elif inner_type_name.startswith("mj"):
       return WrappedFieldData(
           definition=(
-              f"std::vector<{common.uppercase_first_letter(inner_type_name)}>"
-              f" {f.name};"
+              f"std::vector<{common.capitalize(inner_type_name)}> {f.name};"
           ),
           ptr_initialization=f"{f.name}(&ptr_->{f.name})",
           typename=_get_field_struct_type(f.type),
@@ -270,7 +267,7 @@ def _generate_field_data(
         and w not in constants.MANUAL_FIELDS.keys()
     ):
       ptr_field = cast(ast_nodes.PointerType, f.type)
-      wrapper_field_name = common.uppercase_first_letter(
+      wrapper_field_name = common.capitalize(
           cast(ast_nodes.ValueType, ptr_field.inner_type).name
       )
       return WrappedFieldData(
@@ -351,14 +348,14 @@ def build_struct_header(
 ):
   """Builds the C++ header file code for a struct."""
   s = struct_name
-  w = common.uppercase_first_letter(s)
+  w = common.capitalize(s)
 
   if w in constants.MANUAL_STRUCTS:
     return ""
 
   if (
-      s not in constants.ANONYMOUS_STRUCTS and
-      s not in introspect_structs.STRUCTS
+      s not in constants.ANONYMOUS_STRUCTS
+      and s not in introspect_structs.STRUCTS
   ):
     raise RuntimeError(f"Struct {s} not found in introspect structs")
 
@@ -442,7 +439,7 @@ def build_struct_source(
     return ""
 
   s = struct_name
-  w = common.uppercase_first_letter(s)
+  w = common.capitalize(s)
   is_mjs = w.startswith("Mjs")
 
   member_inits = _find_member_inits(wrapped_fields)
@@ -511,7 +508,7 @@ def _build_struct_bindings(
     wrapped_fields: List[WrappedFieldData],
 ):
   """Builds the C++ bindings for a struct."""
-  w = common.uppercase_first_letter(struct_name)
+  w = common.capitalize(struct_name)
   is_mjs = w.startswith("Mjs")
 
   builder = code_builder.CodeBuilder()
@@ -595,7 +592,7 @@ def generate_wasm_bindings(
   wrapped_structs: Dict[str, WrappedStructData] = {}
   for struct_name in structs_to_bind:
     s = struct_name
-    w = common.uppercase_first_letter(s)
+    w = common.capitalize(s)
 
     if s in introspect_structs.STRUCTS:
       struct_fields = introspect_structs.STRUCTS[s].fields

wasm/codegen/tests/coverage_test.py

@@ -117,11 +117,11 @@ class BindingCoverageTest(absltest.TestCase):
     """Asserts that each struct is either not bound or bound in structs.cc."""
     bound_structs = _get_bound_structs_from_cc()
     all_structs = {
-        common.uppercase_first_letter(struct_name)
+        common.capitalize(struct_name)
         for struct_name in introspect_structs.STRUCTS.keys()
     }
     skipped_structs = {
-        common.uppercase_first_letter(struct_name)
+        common.capitalize(struct_name)
         for struct_name in constants.SKIPPED_STRUCTS
     }
     missing_structs = []

wasm/codegen/tests/generators_test.py

@@ -56,14 +56,12 @@ class CodeBuilderTest(absltest.TestCase):
 
 class CommonUtilsTest(absltest.TestCase):
 
-  def test_uppercase_first_letter(self):
-    self.assertEqual(common.uppercase_first_letter(""), "")
-    self.assertEqual(common.uppercase_first_letter("hello"), "Hello")
-    self.assertEqual(common.uppercase_first_letter("1st place"), "1st place")
-    self.assertEqual(common.uppercase_first_letter("!wow"), "!wow")
-    self.assertEqual(
-        common.uppercase_first_letter(" leading space"), " leading space"
-    )
+  def test_capitalize(self):
+    self.assertEqual(common.capitalize(""), "")
+    self.assertEqual(common.capitalize("hello"), "Hello")
+    self.assertEqual(common.capitalize("1st place"), "1st place")
+    self.assertEqual(common.capitalize("!wow"), "!wow")
+    self.assertEqual(common.capitalize(" leading space"), " leading space")
 
 
 class FunctionUtilsTest(absltest.TestCase):
@@ -197,12 +195,8 @@ class FunctionUtilsTest(absltest.TestCase):
     self.assertTrue(functions.is_excluded_function_name("mjui_function"))
     self.assertTrue(functions.is_excluded_function_name("mju_malloc"))
     self.assertTrue(functions.is_excluded_function_name("mj_makeData"))
-    self.assertFalse(
-        functions.is_excluded_function_name("mjv_updateScene")
-    )
-    self.assertFalse(
-        functions.is_excluded_function_name("mj_normalFunction")
-    )
+    self.assertFalse(functions.is_excluded_function_name("mjv_updateScene"))
+    self.assertFalse(functions.is_excluded_function_name("mj_normalFunction"))
     self.assertFalse(
         functions.is_excluded_function_name("mju_someOtherFunction")
     )
@@ -493,7 +487,8 @@ class StructFieldCodeBuilderTest(absltest.TestCase):
         type=ast_nodes.ValueType(name="int"),
         doc="number of geoms",
     )
-    self.assertEqual(structs._generate_field_data(field, "ngeom").definition,
+    self.assertEqual(
+        structs._generate_field_data(field, "ngeom").definition,
         """
 int ngeom() const {
   return ptr_->ngeom;