1erl_internal(3)            Erlang Module Definition            erl_internal(3)
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NAME

6       erl_internal - Internal Erlang definitions.
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DESCRIPTION

9       This  module defines Erlang BIFs, guard tests, and operators. This mod‐
10       ule is only of interest to programmers who manipulate Erlang code.
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EXPORTS

13       add_predefined_functions(Forms) -> UpdatedForms
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15              Types:
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17                 Forms = [erl_parse:abstract_form() | erl_parse:form_info()]
18                 UpdatedForms =
19                     [erl_parse:abstract_form() | erl_parse:form_info()]
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21              Adds to Forms the code for the  standard  pre-defined  functions
22              (such as module_info/0) that are to be included in every module.
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24       arith_op(OpName, Arity) -> boolean()
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26              Types:
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28                 OpName = atom()
29                 Arity = arity()
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31              Returns  true  if OpName/Arity is an arithmetic operator, other‐
32              wise false.
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34       bif(Name, Arity) -> boolean()
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36              Types:
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38                 Name = atom()
39                 Arity = arity()
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41              Returns true if Name/Arity is an Erlang BIF  that  is  automati‐
42              cally recognized by the compiler, otherwise false.
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44       bool_op(OpName, Arity) -> boolean()
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46              Types:
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48                 OpName = atom()
49                 Arity = arity()
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51              Returns  true  if  OpName/Arity is a Boolean operator, otherwise
52              false.
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54       comp_op(OpName, Arity) -> boolean()
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56              Types:
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58                 OpName = atom()
59                 Arity = arity()
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61              Returns true if OpName/Arity is a comparison operator, otherwise
62              false.
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64       guard_bif(Name, Arity) -> boolean()
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66              Types:
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68                 Name = atom()
69                 Arity = arity()
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71              Returns  true  if Name/Arity is an Erlang BIF that is allowed in
72              guards, otherwise false.
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74       list_op(OpName, Arity) -> boolean()
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76              Types:
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78                 OpName = atom()
79                 Arity = arity()
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81              Returns true if  OpName/Arity  is  a  list  operator,  otherwise
82              false.
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84       op_type(OpName, Arity) -> Type
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86              Types:
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88                 OpName = atom()
89                 Arity = arity()
90                 Type = arith | bool | comp | list | send
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92              Returns  the  Type  of operator that OpName/Arity belongs to, or
93              generates a function_clause error if it is not an operator.
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95       send_op(OpName, Arity) -> boolean()
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97              Types:
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99                 OpName = atom()
100                 Arity = arity()
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102              Returns true if  OpName/Arity  is  a  send  operator,  otherwise
103              false.
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105       type_test(Name, Arity) -> boolean()
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107              Types:
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109                 Name = atom()
110                 Arity = arity()
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112              Returns  true  if Name/Arity is a valid Erlang type test, other‐
113              wise false.
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117Ericsson AB                       stdlib 4.2                   erl_internal(3)