====== Language plugins : Implementation ======

===== Simple query functions =====

==== ~LANGUAGE() ====
C++ rules require a virtual destructor when there are virtual functions.  You need to define one as a tracing aid.  It can be an empty function.
<code cpp>
  ~LANG_VERILOG() {itested();}
</code>

==== std::string name()const ====
Return the name to use as a key to enable this language.
<code cpp>
  std::string name()const {return "verilog";}
</code>

==== bool case_insensitive()const ====
Return false if the language is case sensitive, true if case insensitive.
<code cpp>
  bool case_insensitive()const {return false;}
</code>

==== UNITS units()const ====
This function determines how numeric strings with multiplier suffixes such as "10m" are parsed.  It should return ''uSI'' for standard SI units.  (M = meg = 10^6, m = milli = 10^-3)  or ''uSPICE'' for SPICE syntax (M = milli = 10^-3, Meg = meg = 10^6).
<code cpp>
  UNITS units()const {return uSI;}
</code>

===== Used by obsolete_callback =====

These functions describe the syntax for parameter assignment statements.  

For example, the most common syntax is ''x=value'', but Verilog uses ''.x(value)''.

You need to specify  the front, mid, and back strings.

For ''x=value''
the code is:
<code cpp>
  std::string arg_front()const {return " ";}
  std::string arg_mid()const {return "=";}
  std::string arg_back()const {return "";}
</code>

For ''.x(value)''
the code is:
<code cpp>
  std::string arg_front()const {return ".";}
  std::string arg_mid()const {return "(";}
  std::string arg_back()const {return ")";}
</code>