NAME

       erl_internal - Internal Erlang Definitions

DESCRIPTION

       This  module  defines  Erlang  BIFs,  guard  tests  and  operators. This module is only of
       interest to programmers who manipulate Erlang code.

EXPORTS

       bif(Name, Arity) -> boolean()

              Types:

                 Name = atom()
                 Arity = arity()

              Returns true if Name/Arity is an Erlang BIF which is  automatically  recognized  by
              the compiler, otherwise false.

       guard_bif(Name, Arity) -> boolean()

              Types:

                 Name = atom()
                 Arity = arity()

              Returns  true  if Name/Arity is an Erlang BIF which is allowed in guards, otherwise
              false.

       type_test(Name, Arity) -> boolean()

              Types:

                 Name = atom()
                 Arity = arity()

              Returns true if Name/Arity is a valid Erlang type test, otherwise false.

       arith_op(OpName, Arity) -> boolean()

              Types:

                 OpName = atom()
                 Arity = arity()

              Returns true if OpName/Arity is an arithmetic operator, otherwise false.

       bool_op(OpName, Arity) -> boolean()

              Types:

                 OpName = atom()
                 Arity = arity()

              Returns true if OpName/Arity is a Boolean operator, otherwise false.

       comp_op(OpName, Arity) -> boolean()

              Types:

                 OpName = atom()
                 Arity = arity()

              Returns true if OpName/Arity is a comparison operator, otherwise false.

       list_op(OpName, Arity) -> boolean()

              Types:

                 OpName = atom()
                 Arity = arity()

              Returns true if OpName/Arity is a list operator, otherwise false.

       send_op(OpName, Arity) -> boolean()

              Types:

                 OpName = atom()
                 Arity = arity()

              Returns true if OpName/Arity is a send operator, otherwise false.

       op_type(OpName, Arity) -> Type

              Types:

                 OpName = atom()
                 Arity = arity()
                 Type = arith | bool | comp | list | send

              Returns the  Type  of  operator  that  OpName/Arity  belongs  to,  or  generates  a
              function_clause error if it is not an operator at all.