Module:TableBuilder

--Module appliquant aux fonctions de la librairie Table une inteface fluide.

local meta = {

   insert = function ( t, ... )
       table.insert( t, ... )
       return t
   end,
   
   remove = function ( t, ... )
       table.remove( t, ... )
       return t
   end,
   
   sort = function ( t, ... )
       table.sort( t, ... )
       return t
   end,
   
   maxn = function ( t )
       return table.maxn( t )
   end,
   
   concat = function ( t, ... )
       return table.concat( t, ... )
   end,
   
   minsert = function( t, ... )
       local sel
       for i = 1, select( '#', ... ) do
           sel = select( i, ... )
           if sel then
               table.insert( t, sel )
           end
       end
       return t
   end,
   
   tinsert = function( t, tab, first, last )
       if type( tab ) == 'table' then
           for i = ( tonumber( first ) or 1 ), ( tonumber( last ) or #tab ) do
               table.insert( t, tab[i] )
           end
       end
       return t
   end,

}

meta.__index = function ( t, key )

   local metafunc = meta[key]
   if type( metafunc ) == 'function' then
       return function ( ... ) return metafunc( t, ... ) end
   end

end

-- fin des fonctions de la meta-table

local TableBuilder = {

   new = function( ... )
       local t = { ... }
       setmetatable( t, meta )
       return t
   end,
   
   set = function( t )
       if type( t ) == 'table' then
           setmetatable( t, meta )
       end
       return t
   end,

   clone = function ( t )
       local tableRefs = { }
       local function recursiveClone( val )
           if type( val ) == 'table' then
               -- Encode circular references correctly
               if tableRefs[val] ~= nil then
                   return tableRefs[val]
               end
   
               local retVal = { }
               tableRefs[val] = setmetatable( retVal, meta )
   
               for key, elt in pairs( val ) do
                   retVal[key] = recursiveClone( elt )
               end
               return retVal
           else
               return val
           end
       end
       return recursiveClone( t )
   end,

}

return TableBuilder