style VHDL is
written by "Thomas Parmelan <Thomas.Parmelan@efrei.fr>"
version is 1.2
requires a2ps version 4.9.7

documentation is
   "Non-textual operators are not highlighted."
   "Some logical operators are printed as graphical symbols"
   "in the second level of pretty-printing."
end documentation

alphabets are
   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_"

keywords in Keyword_strong are
   abs, access, after, alias, all, and, architecture, array, assert,
   attribute, begin, block, body, buffer, bus, "case", component,
   configuration, constant, disconnect, downto, else, elsif, "end",
   entity, exit, file, for, function, generate, generic, guarded, if,
   inout, "in", "is", label, library, linkage, loop, map, mod, nand,
   new, next, nor, not, null, of, on, open, or, others, out, package,
   port, procedure, process, range, record, register, rem, report,
   return, select, severity, signal, subtype, then, to, transport,
   type, units, until, use, variable, wait, when, while, with, xor
end keywords

operators are
  # Handling of Ada-like character literals
  (/'(.)'/ "'" Plain, \1 String, "'" Plain)
end operators

keywords in Keyword are
   std_ulogic, std_ulogic_vector, signed, unsigned
end keywords

optional keywords are
   not \not,
   or \vee,
   and \wedge,
   implies \Rightarrow
end keywords

sequences are
    -- Comment,

    # Strings (escaping is a` la ada, not as in C)
    "\"" Plain String "\"" Plain
       exceptions are
          "\"\""
       end exceptions,

    # Protect the << ' >> of the attributes
    /'[a-z][a-z_]*/ Plain /[^a-z_]/ Plain,

    # Libraries
    "library" Keyword_strong Label ";" Plain,

    # Entities
    /(entity|architecture|function)/ Keyword_strong 
    Label 
    /[ \t]*(is|of)/ Keyword_strong
end sequences

end style