Adding all C++ keywords...

[Isaac To]

Hi,

I'm finding it rather ugly to have some C++ keywords not to be properly
typesetted as such because they are not C keywords and they are not very
common.  The full list of the 26 missing keywords (out of 74):

  C++ types
    bool wchar_t typeid typename 

  C++ constants
    false true

  C++ casting operators
    const_cast dynamic_cast reinterpret_cast static_cast

  Namespace support
    namespace using

  Alternative operator names:
    and and_eq bitand bitor compl not not_eq or or_eq xor xor_eq

  Lesser known features
    explicit export mutable

Is it possible to have a flag in the next version of lout that @CP will have
a flag indicating the program is a C++ program, and if so treat all these
as keywords?

Regards,
Isaac.