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This documentation aims to use of the following naming and formatting conventions.
fixed width
          font and is syntax-highlighted
          in color, for example double.
        teletype fixed-width font.
        italics.
        free_function();
          that is, it is in code font and its name is
          followed by () to indicate
          that it is a free function.
        class_template<>;
          that is, it is in code font and its name is followed by <>
          to indicate that it is a class template.
        MACRO();
          that is, it is uppercase in code font and its name is followed by () to indicate that it is a function-like
          macro. Object-like macros appear without the trailing ().