Mercurial > octave

annotate scripts/general/idivide.m @ 27919:1891570abac8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
parents b442ec6dda5c
children bd51beb6205e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
27919
1891570abac8 update Octave Project Developers copyright for the new year
John W. Eaton <jwe@octave.org>
parents: 27918
diff changeset
1 ## Copyright (C) 2008-2020 The Octave Project Developers
27918
b442ec6dda5c use centralized file for copyright info for individual contributors
John W. Eaton <jwe@octave.org>
parents: 27742
diff changeset
2 ##
b442ec6dda5c use centralized file for copyright info for individual contributors
John W. Eaton <jwe@octave.org>
parents: 27742
diff changeset
3 ## See the file COPYRIGHT.md in the top-level directory of this distribution
b442ec6dda5c use centralized file for copyright info for individual contributors
John W. Eaton <jwe@octave.org>
parents: 27742
diff changeset
4 ## or <https://octave.org/COPYRIGHT.html/>.
b442ec6dda5c use centralized file for copyright info for individual contributors
John W. Eaton <jwe@octave.org>
parents: 27742
diff changeset
5 ##
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
6 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
7 ## This file is part of Octave.
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
8 ##
24534
194eb4bd202b maint: Update punctuation for GPL v3 license text.
Rik <rik@octave.org>
parents: 23220
diff changeset
9 ## Octave is free software: you can redistribute it and/or modify it
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
10 ## under the terms of the GNU General Public License as published by
24534
194eb4bd202b maint: Update punctuation for GPL v3 license text.
Rik <rik@octave.org>
parents: 23220
diff changeset
11 ## the Free Software Foundation, either version 3 of the License, or
22755
3a2b891d0b33 maint: Standardize Copyright formatting.
Rik <rik@octave.org>
parents: 22323
diff changeset
12 ## (at your option) any later version.
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
13 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
14 ## Octave is distributed in the hope that it will be useful, but
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
15 ## WITHOUT ANY WARRANTY; without even the implied warranty of
22755
3a2b891d0b33 maint: Standardize Copyright formatting.
Rik <rik@octave.org>
parents: 22323
diff changeset
16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3a2b891d0b33 maint: Standardize Copyright formatting.
Rik <rik@octave.org>
parents: 22323
diff changeset
17 ## GNU General Public License for more details.
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
18 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
19 ## You should have received a copy of the GNU General Public License
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
20 ## along with Octave; see the file COPYING. If not, see
24534
194eb4bd202b maint: Update punctuation for GPL v3 license text.
Rik <rik@octave.org>
parents: 23220
diff changeset
21 ## <https://www.gnu.org/licenses/>.
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
22
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
23 ## -*- texinfo -*-
20852
516bb87ea72e 2015 Code Sprint: remove class of function from docstring for all m-files.
Rik <rik@octave.org>
parents: 19833
diff changeset
24 ## @deftypefn {} {} idivide (@var{x}, @var{y}, @var{op})
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
25 ## Integer division with different rounding rules.
10687
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
26 ##
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
27 ## The standard behavior of integer division such as @code{@var{a} ./ @var{b}}
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
28 ## is to round the result to the nearest integer. This is not always the
10687
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
29 ## desired behavior and @code{idivide} permits integer element-by-element
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
30 ## division to be performed with different treatment for the fractional
9036
58604c45ca74 Cleanup of data types related documentation
Rik <rdrider0-list@yahoo.com>
parents: 7627
diff changeset
31 ## part of the division as determined by the @var{op} flag. @var{op} is
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
32 ## a string with one of the values:
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
33 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
34 ## @table @asis
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
35 ## @item @qcode{"fix"}
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
36 ## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
37 ## towards zero.
10821
693e22af08ae Grammarcheck documentation of m-files
Rik <octave@nomad.inbox5.com>
parents: 10687
diff changeset
38 ##
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
39 ## @item @qcode{"round"}
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
40 ## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
41 ## towards the nearest integer.
10821
693e22af08ae Grammarcheck documentation of m-files
Rik <octave@nomad.inbox5.com>
parents: 10687
diff changeset
42 ##
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
43 ## @item @qcode{"floor"}
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
44 ## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
10687
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
45 ## towards negative infinity.
10821
693e22af08ae Grammarcheck documentation of m-files
Rik <octave@nomad.inbox5.com>
parents: 10687
diff changeset
46 ##
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
47 ## @item @qcode{"ceil"}
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
48 ## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
10687
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
49 ## towards positive infinity.
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
50 ## @end table
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
51 ##
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
52 ## @noindent
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
53 ## If @var{op} is not given it defaults to @qcode{"fix"}.
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
54 ## An example demonstrating these rounding rules is
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
55 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
56 ## @example
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 9036
diff changeset
57 ## @group
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
58 ## idivide (int8 ([-3, 3]), int8 (4), "fix")
26600
f6730533820e doc: clean up doc example blocks for accuracy and consistent formatting
Mike Miller <mtmiller@octave.org>
parents: 26376
diff changeset
59 ## @result{} 0 0
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
60 ## idivide (int8 ([-3, 3]), int8 (4), "round")
26600
f6730533820e doc: clean up doc example blocks for accuracy and consistent formatting
Mike Miller <mtmiller@octave.org>
parents: 26376
diff changeset
61 ## @result{} -1 1
10687
a8ce6bdecce5 Improve documentation strings.
Rik <octave@nomad.inbox5.com>
parents: 10549
diff changeset
62 ## idivide (int8 ([-3, 3]), int8 (4), "floor")
26600
f6730533820e doc: clean up doc example blocks for accuracy and consistent formatting
Mike Miller <mtmiller@octave.org>
parents: 26376
diff changeset
63 ## @result{} -1 0
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
64 ## idivide (int8 ([-3, 3]), int8 (4), "ceil")
26600
f6730533820e doc: clean up doc example blocks for accuracy and consistent formatting
Mike Miller <mtmiller@octave.org>
parents: 26376
diff changeset
65 ## @result{} 0 1
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 9036
diff changeset
66 ## @end group
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
67 ## @end example
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
68 ##
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
69 ## @seealso{ldivide, rdivide}
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
70 ## @end deftypefn
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
71
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
72 function z = idivide (x, y, op)
21758
ffad2baa90f7 maint: Use newlines to make code more readable.
Rik <rik@octave.org>
parents: 20852
diff changeset
73
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
74 if (nargin < 2 || nargin > 3)
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
75 print_usage ();
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
76 endif
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
77
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
78 if (nargin == 2)
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
79 op = "fix";
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
80 else
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
81 op = tolower (op);
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
82 endif
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
83
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
84 if (isfloat (x))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
85 if (isinteger (y))
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
86 typ = class (y);
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
87 else
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
88 error ("idivide: at least one input (X or Y) must be an integer type");
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
89 endif
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
90 elseif (isfloat (y))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
91 if (isinteger (x))
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
92 typ = class (x);
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
93 else
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
94 error ("idivide: at least one input (X or Y) must be an integer type");
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
95 endif
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
96 else
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
97 typ = class (x);
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
98 if (! strcmp (typ, class (y)))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
99 error ("idivide: integer type of X (%s) must match integer type of Y (%s)", typ, class (y));
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
100 endif
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
101 endif
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
102
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
103 if (strcmp (op, "fix"))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
104 z = cast (fix (double (x) ./ double (y)), typ);
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
105 elseif (strcmp (op, "round"))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
106 z = x ./ y;
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
107 elseif (strcmp (op, "floor"))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
108 z = cast (floor (double (x) ./ double (y)), typ);
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
109 elseif (strcmp (op, "ceil"))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
110 z = cast (ceil (double (x) ./ double (y)), typ);
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
111 else
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
112 error ('idivide: unrecognized rounding type "%s"', op);
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
113 endif
21758
ffad2baa90f7 maint: Use newlines to make code more readable.
Rik <rik@octave.org>
parents: 20852
diff changeset
114
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
115 endfunction
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
116
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
117
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
118 %!shared a, af, b, bf
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
119 %! a = int8 (3);
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
120 %! af = 3;
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
121 %! b = int8 ([-4, 4]);
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
122 %! bf = [-4, 4];
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
123
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
124 %!assert (idivide (a, b), int8 ([0, 0]))
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
125 %!assert (idivide (a, b, "floor"), int8 ([-1, 0]))
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
126 %!assert (idivide (a, b, "ceil"), int8 ([0, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
127 %!assert (idivide (a, b, "round"), int8 ([-1, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
128
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
129 %!assert (idivide (af, b), int8 ([0, 0]))
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
130 %!assert (idivide (af, b, "floor"), int8 ([-1, 0]))
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
131 %!assert (idivide (af, b, "ceil"), int8 ([0, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
132 %!assert (idivide (af, b, "round"), int8 ([-1, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
133
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
134 %!assert (idivide (a, bf), int8 ([0, 0]))
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14327
diff changeset
135 %!assert (idivide (a, bf, "floor"), int8 ([-1, 0]))
7627
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
136 %!assert (idivide (a, bf, "ceil"), int8 ([0, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
137 %!assert (idivide (a, bf, "round"), int8 ([-1, 1]))
0483fad1d888 Add the idivide function
David Bateman <dbateman@free.fr>
parents:
diff changeset
138
27742
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
139 ## Test input validation
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
140 %!error idivide (uint8 (1))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
141 %!error idivide (uint8 (1), 2, 3)
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
142 %!error <at least one input> idivide (1, 2)
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
143 %!error <at least one input> idivide ({1}, 2)
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
144 %!error <X \(int8\) must match.* Y \(uint8\)> idivide (int8 (1), uint8 (2))
d39c56824d01 idivid.m: error out if both inputs are floating point (bug #57278).
Rik <rik@octave.org>
parents: 26600
diff changeset
145 %!error <unrecognized rounding type "foo"> idivide (int8 (1), 2, "foo")