clang

import os from clang.cindex import Index, Config, TranslationUnit # type: ignore # CRITICAL: Ensure libclang (the C++ library) is installed and discoverable. # The 'clang' pip package only provides Python wrappers. # # On macOS (with Homebrew LLVM): # Config.set_library_path('/usr/local/opt/llvm/lib') # On Linux (e.g., Ubuntu/Debian LLVM-18): # Config.set_library_path('/usr/lib/llvm-18/lib') # On Windows, ensure 'libclang.dll' is in your PATH or set its full path. # Alternatively, set the CLANG_LIBRARY_PATH environment variable. source_code = """ #include <stdio.h> int add(int a, int b) { return a + b; } int main() { printf("Hello from Clang AST!"); int result = add(5, 7); return 0; } """ try: index = Index.create() # Parse the source code from a string. 'main.c' is a dummy name. # args can include compiler flags, e.g., ['-std=c99', '-I/path/to/includes'] tu = index.parse('main.c', unsaved_files=[('main.c', source_code)], args=['-x', 'c']) # Check for diagnostics (errors, warnings) during parsing if tu.diagnostics: for diag in tu.diagnostics: if diag.severity >= 3: # Error or Fatal print(f"Diagnostic (Error): {diag.spelling} at {diag.location}") # Walk the AST and print top-level declarations print("\nTop-level declarations:") for cursor in tu.cursor.get_children(): if cursor.location.file and cursor.location.file.name == 'main.c': print(f"- {cursor.kind.name}: {cursor.spelling} at Line {cursor.location.line}") # Example: Finding the 'main' function and its call to 'add' for cursor in tu.cursor.walk_preorder(): if cursor.kind.is_function() and cursor.spelling == 'main': print(f"\nFound 'main' function at Line {cursor.location.line}") for child in cursor.get_children(): if child.kind.is_call_expr() and child.spelling == 'add': print(f" -> 'main' calls 'add' at Line {child.location.line}") break except Exception as e: print(f"An error occurred: {e}") print("Hint: Make sure libclang is installed on your system and its path is correctly configured.")