Lua metamethods table

metamethods.txt

Sean Conner 
http://lua-users.org/lists/lua-l/2015-04/msg00033.html
 
               5.1     5.2     5.3     function
__add           *       *       *       a + b
__sub           *       *       *       a - b
__mul           *       *       *       a * b
__div           *       *       *       a / b
__mod           *       *       *       a % b
__pow           *       *       *       a ^ b
__umn           *       *       *       -a
__idiv                          *       a // b
__band                          *       a & b
__bor                           *       a | b
__bxor                          *       a ~ b
__bnot                          *       ~a
__shl                           *       a << b
__shr                           *       a >> b
__concat        *       *       *       a .. b
__len           *       *       *       #a
__eq            *       *       *       a == b
__lt            *       *       *       a < b
__le            *       *       *       a > b
__index         *       *       *       a = b[]         can be table
__newindex      *       *       *       a[] = b         can be table
__call          *       *       *       a()
__gc            *       *       *
__mode          *       *       *                       string
__metatable     *       *       *                       table
__tostring      *       *       *
__ipairs                *
__pairs                 *       *
__name                          *                       string