fn __pop_Variant17(
    __symbols: &mut Vec<(LexerPosition, __Symbol, LexerPosition)>,
) -> (LexerPosition, PreprocessorExtensionBehavior, LexerPosition)fn __pop_Variant17(
    __symbols: &mut Vec<(LexerPosition, __Symbol, LexerPosition)>,
) -> (LexerPosition, PreprocessorExtensionBehavior, LexerPosition)