aboutsummaryrefslogtreecommitdiffstats
path: root/lib/stdlib/doc/src/erl_internal.xml
blob: 906b95deb721a044d5e9f230a161332a28fdcdc3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
<?xml version="1.0" encoding="latin1" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">

<erlref>
  <header>
    <copyright>
      <year>1996</year>
      <year>2007</year>
      <holder>Ericsson AB, All Rights Reserved</holder>
    </copyright>
    <legalnotice>
  The contents of this file are subject to the Erlang Public License,
  Version 1.1, (the "License"); you may not use this file except in
  compliance with the License. You should have received a copy of the
  Erlang Public License along with this software. If not, it can be
  retrieved online at http://www.erlang.org/.

  Software distributed under the License is distributed on an "AS IS"
  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  the License for the specific language governing rights and limitations
  under the License.

  The Initial Developer of the Original Code is Ericsson AB.
    </legalnotice>

    <title>erl_internal</title>
    <prepared>Robert Virding</prepared>
    <responsible>Bjarne D&auml;cker</responsible>
    <docno>1</docno>
    <approved>Bjarne D&auml;cker</approved>
    <checked></checked>
    <date>97-01-21</date>
    <rev>B</rev>
    <file>erl_internal.sgml</file>
  </header>
  <module>erl_internal</module>
  <modulesummary>Internal Erlang Definitions</modulesummary>
  <description>
    <p>This module defines Erlang BIFs, guard tests and operators.
      This module is only of interest to programmers who
      manipulate Erlang code.</p>
  </description>
  <funcs>
    <func>
      <name>bif(Name, Arity) -> bool()</name>
      <fsummary>Test for an Erlang BIF</fsummary>
      <type>
        <v>Name = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>Name/Arity</c> is an Erlang BIF
          which is automatically recognized by the compiler, otherwise
          <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>guard_bif(Name, Arity) -> bool()</name>
      <fsummary>Test for an Erlang BIF allowed in guards</fsummary>
      <type>
        <v>Name = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>Name/Arity</c> is an Erlang BIF
          which is allowed in guards, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>type_test(Name, Arity) -> bool()</name>
      <fsummary>Test for a valid type test</fsummary>
      <type>
        <v>Name = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>Name/Arity</c> is a valid Erlang
          type test, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>arith_op(OpName, Arity) -> bool()</name>
      <fsummary>Test for an arithmetic operator</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>OpName/Arity</c> is an arithmetic
          operator, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>bool_op(OpName, Arity) -> bool()</name>
      <fsummary>Test for a Boolean operator</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>OpName/Arity</c> is a Boolean
          operator, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>comp_op(OpName, Arity) -> bool()</name>
      <fsummary>Test for a comparison operator</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>OpName/Arity</c> is a comparison
          operator, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>list_op(OpName, Arity) -> bool()</name>
      <fsummary>Test for a list operator</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>OpName/Arity</c> is a list
          operator, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>send_op(OpName, Arity) -> bool()</name>
      <fsummary>Test for a send operator</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
      </type>
      <desc>
        <p>Returns <c>true</c> if <c>OpName/Arity</c> is a send
          operator, otherwise <c>false</c>.</p>
      </desc>
    </func>
    <func>
      <name>op_type(OpName, Arity) -> Type</name>
      <fsummary>Return operator type</fsummary>
      <type>
        <v>OpName = atom()</v>
        <v>Arity = integer()</v>
        <v>Type = arith | bool | comp | list | send</v>
      </type>
      <desc>
        <p>Returns the <c>Type</c> of operator that <c>OpName/Arity</c> 
          belongs to, 
          or generates a <c>function_clause</c> error if it is not an 
          operator at all.</p>
      </desc>
    </func>
  </funcs>
</erlref>