tablecopy.lua

do
  local function shallowcopy(tbl)
    local new = {}
    for k,v in next,tbl do
      new[k] = v
    end
    return new
  end
  
  local function deepcopy(tbl)
    local new = {}
    for k,v in next,tbl do
      if type(k) == 'table' then k = deepcopy(k) end
      if type(v) == 'table' then v = deepcopy(v) end
      new[k] = v
    end
    return new
  end
  
  function table.copy(tbl,deep)
    argcheck(tbl,1,'table')
    
    if deep then
      return deepcopy(tbl)
    else
      return shallowcopy(tbl)
    end
  end
end