NAME 
pmc/luanil.pmc - Lua Nil
DESCRIPTION
LuaNil extends LuaAny to provide a class with the behaviour of the Lua Nil type.
LuaNil is no longer a singleton; this would be a problem, as all uninitialized values in Lua are LuaNil. If some value is assigned, the LuaNil should morph into the correct type, and so a new PMC is constructed anyway. Therefore, we may as well create a new PMC right away. Also, creating a new PMC from a singleton class is troublesome (if not possible?).
Methods
PMC *instantiate_str(STRING *rep, INTVAL flags)
Allow :
STRING *name()
Return the string "nil".
PMC *clone()
Creates and returns a clone of the scalar.
STRING *get_string()
Return the string "nil".
INTVAL get_bool()
Return always INTVAL defined()
"nil" in Lua is always undefined.
.const .LuaNil nil = "dummy"
false.
