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erl_internal(3erl) Erlang Module Definition erl_internal(3erl)

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


add_predefined_functions(Forms) -> UpdatedForms


Types:

Forms = [erl_parse:abstract_form() | erl_parse:form_info()]
UpdatedForms =
[erl_parse:abstract_form() | erl_parse:form_info()]

Adds to Forms the code for the standard pre-defined functions (such as module_info/0) that are to be included in every module.


arith_op(OpName, Arity) -> boolean()


Types:

OpName = atom()
Arity = arity()

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


bif(Name, Arity) -> boolean()


Types:

Name = atom()
Arity = arity()

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


guard_bif(Name, Arity) -> boolean()


Types:

Name = atom()
Arity = arity()

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


list_op(OpName, Arity) -> boolean()


Types:

OpName = atom()
Arity = arity()

Returns true if OpName/Arity is a list 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.


send_op(OpName, Arity) -> boolean()


Types:

OpName = atom()
Arity = arity()

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

stdlib 3.17.2.1 Ericsson AB