[libc] newheadergen: adding h_def_file arg to test (#99397)

Summary: - spacing with _NOEXCEPT

Test Plan: 

Reviewers: 

Subscribers: 

Tasks: 

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Differential Revision: https://phabricator.intern.facebook.com/D60250986

Author: aaryanshukla

libc/newhdrgen/class_implementation/classes/function.py

@@ -26,7 +26,7 @@ def __str__(self):
         attributes_str = " ".join(self.attributes)
         arguments_str = ", ".join(self.arguments)
         if attributes_str == "":
-            result = f"{self.return_type} {self.name}({arguments_str});"
+            result = f"{self.return_type} {self.name}({arguments_str})"
         else:
             result = f"{attributes_str} {self.return_type} {self.name}({arguments_str})"
         return result

libc/newhdrgen/header.py

@@ -60,24 +60,24 @@ def __str__(self):
         current_guard = None
         for function in self.functions:
             if function.guard == None:
-                content.append(str(function) + "__NOEXCEPT")
+                content.append(str(function) + " __NOEXCEPT;")
                 content.append("")
             else:
                 if current_guard == None:
                     current_guard = function.guard
                     content.append(f"#ifdef {current_guard}")
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
                 elif current_guard == function.guard:
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
                 else:
                     content.pop()
                     content.append(f"#endif // {current_guard}")
                     content.append("")
                     current_guard = function.guard
                     content.append(f"#ifdef {current_guard}")
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
         if current_guard != None:
             content.pop()

libc/newhdrgen/tests/output/test_small.h

@@ -25,6 +25,7 @@ def run_script(self, yaml_file, h_def_file, output_dir):
                 "python3",
                 str(self.source_dir / "libc/newhdrgen/yaml_to_classes.py"),
                 str(yaml_file),
+                "--h_def_file",
                 str(h_def_file),
                 "--output_dir",
                 str(output_dir),