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class3.py

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  • fix-multi-decl.py 1.33 KiB
    #!/usr/bin/env python3
    #
    # I prefer to have the closing brace of a multi-line declaration or function call on its
    # own line.  This is unfortunately not yet supported by clang-format.  This script is
    # a hack to manually introduce my style.
    #
    # Tracking for this style in clang-format: https://reviews.llvm.org/D33029
    #
    # Example
    # =======
    # This is the style I want:
    #
    #     printf(
    #         "Hello %s %d\n",
    #         "World",
    #         123
    #     );
    import re
    import sys
    
    EXPR = r"""                         # Indentation is saved to <ws>
    ^(?P<ws>[ \t]*)(?P<decl>.*\(\n      # Opening line, ending with (\n
        (?:.*,\n)*                      # Lines with arguments, all ending with ,\n
        .*)\)(?P<final>[); \t]*)\n      # Last line with closing brace & optional following characters
    (?![ \t]*\).*)                      # Don't match an already expanded decl
    """
    
    
    def main():
        with open(sys.argv[1], "r") as f:
            source = f.read()
    
        fixed = re.sub(
            EXPR,
            r"\g<ws>\g<decl>\n\g<ws>)\g<final>\n",
            source,
            flags=re.MULTILINE | re.VERBOSE,
        )
    
        # Fix function definitions that can now be pulled into one line
        fixed = re.sub(
            r"^\)\n{$",
            r") {",
            fixed,
            flags=re.MULTILINE,
        )
    
        with open(sys.argv[1], "w") as f:
            f.write(fixed)
    
    
    if __name__ == "__main__":
        main()