A toy package designed to showcase and serve as a reference/tutorial for S7 development. To be used in conjunction with the S7 package webs
Started on package.
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BigNum.Rproj
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BigNum.Rproj
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Version: 1.0
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RestoreWorkspace: No
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SaveWorkspace: No
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AlwaysSaveHistory: Default
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EnableCodeIndexing: Yes
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Encoding: UTF-8
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AutoAppendNewline: Yes
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StripTrailingWhitespace: Yes
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LineEndingConversion: Posix
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BuildType: Package
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PackageInstallArgs: --no-multiarch --with-keep.source
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PackageRoxygenize: rd,collate,namespace
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DESCRIPTION
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DESCRIPTION
···
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Package: BigNum
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Title: A S7 Showcase
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Version: 0.0.0.9000
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Authors@R:
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person("Visruth", "Srimath Kandali", , "visruth@gmail.com", role = c("aut", "cre"),
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comment = c(ORCID = "0009-0005-9097-0688"))
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Description: A toy package designed to showcase and serve as a
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reference/tutorial for S7 development. To be used in conjunction with
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the S7 package website.
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License: GPL (>= 3)
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Imports:
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rlang (>= 1.1.4),
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S7 (>= 0.2.0)
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Encoding: UTF-8
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Roxygen: list(markdown = TRUE)
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RoxygenNote: 7.3.2
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LICENSE.md
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LICENSE.md
···
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GNU General Public License
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==========================
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_Version 3, 29 June 2007_
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_Copyright © 2007 Free Software Foundation, Inc. <<http://fsf.org/>>_
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merging organizations. If propagation of a covered work results from an entity
397
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transaction, each party to that transaction who receives a copy of the work also
398
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receives whatever licenses to the work the party's predecessor in interest had or
399
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could give under the previous paragraph, plus a right to possession of the
400
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Corresponding Source of the work from the predecessor in interest, if the predecessor
401
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has it or can get it with reasonable efforts.
402
+
403
+
You may not impose any further restrictions on the exercise of the rights granted or
404
+
affirmed under this License. For example, you may not impose a license fee, royalty,
405
+
or other charge for exercise of rights granted under this License, and you may not
406
+
initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging
407
+
that any patent claim is infringed by making, using, selling, offering for sale, or
408
+
importing the Program or any portion of it.
409
+
410
+
### 11. Patents
411
+
412
+
A “contributor” is a copyright holder who authorizes use under this
413
+
License of the Program or a work on which the Program is based. The work thus
414
+
licensed is called the contributor's “contributor version”.
415
+
416
+
A contributor's “essential patent claims” are all patent claims owned or
417
+
controlled by the contributor, whether already acquired or hereafter acquired, that
418
+
would be infringed by some manner, permitted by this License, of making, using, or
419
+
selling its contributor version, but do not include claims that would be infringed
420
+
only as a consequence of further modification of the contributor version. For
421
+
purposes of this definition, “control” includes the right to grant patent
422
+
sublicenses in a manner consistent with the requirements of this License.
423
+
424
+
Each contributor grants you a non-exclusive, worldwide, royalty-free patent license
425
+
under the contributor's essential patent claims, to make, use, sell, offer for sale,
426
+
import and otherwise run, modify and propagate the contents of its contributor
427
+
version.
428
+
429
+
In the following three paragraphs, a “patent license” is any express
430
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agreement or commitment, however denominated, not to enforce a patent (such as an
431
+
express permission to practice a patent or covenant not to sue for patent
432
+
infringement). To “grant” such a patent license to a party means to make
433
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such an agreement or commitment not to enforce a patent against the party.
434
+
435
+
If you convey a covered work, knowingly relying on a patent license, and the
436
+
Corresponding Source of the work is not available for anyone to copy, free of charge
437
+
and under the terms of this License, through a publicly available network server or
438
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other readily accessible means, then you must either **(1)** cause the Corresponding
439
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Source to be so available, or **(2)** arrange to deprive yourself of the benefit of the
440
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patent license for this particular work, or **(3)** arrange, in a manner consistent with
441
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the requirements of this License, to extend the patent license to downstream
442
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recipients. “Knowingly relying” means you have actual knowledge that, but
443
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for the patent license, your conveying the covered work in a country, or your
444
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recipient's use of the covered work in a country, would infringe one or more
445
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identifiable patents in that country that you have reason to believe are valid.
446
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447
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If, pursuant to or in connection with a single transaction or arrangement, you
448
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convey, or propagate by procuring conveyance of, a covered work, and grant a patent
449
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license to some of the parties receiving the covered work authorizing them to use,
450
+
propagate, modify or convey a specific copy of the covered work, then the patent
451
+
license you grant is automatically extended to all recipients of the covered work and
452
+
works based on it.
453
+
454
+
A patent license is “discriminatory” if it does not include within the
455
+
scope of its coverage, prohibits the exercise of, or is conditioned on the
456
+
non-exercise of one or more of the rights that are specifically granted under this
457
+
License. You may not convey a covered work if you are a party to an arrangement with
458
+
a third party that is in the business of distributing software, under which you make
459
+
payment to the third party based on the extent of your activity of conveying the
460
+
work, and under which the third party grants, to any of the parties who would receive
461
+
the covered work from you, a discriminatory patent license **(a)** in connection with
462
+
copies of the covered work conveyed by you (or copies made from those copies), or **(b)**
463
+
primarily for and in connection with specific products or compilations that contain
464
+
the covered work, unless you entered into that arrangement, or that patent license
465
+
was granted, prior to 28 March 2007.
466
+
467
+
Nothing in this License shall be construed as excluding or limiting any implied
468
+
license or other defenses to infringement that may otherwise be available to you
469
+
under applicable patent law.
470
+
471
+
### 12. No Surrender of Others' Freedom
472
+
473
+
If conditions are imposed on you (whether by court order, agreement or otherwise)
474
+
that contradict the conditions of this License, they do not excuse you from the
475
+
conditions of this License. If you cannot convey a covered work so as to satisfy
476
+
simultaneously your obligations under this License and any other pertinent
477
+
obligations, then as a consequence you may not convey it at all. For example, if you
478
+
agree to terms that obligate you to collect a royalty for further conveying from
479
+
those to whom you convey the Program, the only way you could satisfy both those terms
480
+
and this License would be to refrain entirely from conveying the Program.
481
+
482
+
### 13. Use with the GNU Affero General Public License
483
+
484
+
Notwithstanding any other provision of this License, you have permission to link or
485
+
combine any covered work with a work licensed under version 3 of the GNU Affero
486
+
General Public License into a single combined work, and to convey the resulting work.
487
+
The terms of this License will continue to apply to the part which is the covered
488
+
work, but the special requirements of the GNU Affero General Public License, section
489
+
13, concerning interaction through a network will apply to the combination as such.
490
+
491
+
### 14. Revised Versions of this License
492
+
493
+
The Free Software Foundation may publish revised and/or new versions of the GNU
494
+
General Public License from time to time. Such new versions will be similar in spirit
495
+
to the present version, but may differ in detail to address new problems or concerns.
496
+
497
+
Each version is given a distinguishing version number. If the Program specifies that
498
+
a certain numbered version of the GNU General Public License “or any later
499
+
version” applies to it, you have the option of following the terms and
500
+
conditions either of that numbered version or of any later version published by the
501
+
Free Software Foundation. If the Program does not specify a version number of the GNU
502
+
General Public License, you may choose any version ever published by the Free
503
+
Software Foundation.
504
+
505
+
If the Program specifies that a proxy can decide which future versions of the GNU
506
+
General Public License can be used, that proxy's public statement of acceptance of a
507
+
version permanently authorizes you to choose that version for the Program.
508
+
509
+
Later license versions may give you additional or different permissions. However, no
510
+
additional obligations are imposed on any author or copyright holder as a result of
511
+
your choosing to follow a later version.
512
+
513
+
### 15. Disclaimer of Warranty
514
+
515
+
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
516
+
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
517
+
PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
518
+
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
519
+
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
520
+
QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
521
+
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
522
+
523
+
### 16. Limitation of Liability
524
+
525
+
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
526
+
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS
527
+
PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
528
+
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
529
+
PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
530
+
OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
531
+
WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
532
+
POSSIBILITY OF SUCH DAMAGES.
533
+
534
+
### 17. Interpretation of Sections 15 and 16
535
+
536
+
If the disclaimer of warranty and limitation of liability provided above cannot be
537
+
given local legal effect according to their terms, reviewing courts shall apply local
538
+
law that most closely approximates an absolute waiver of all civil liability in
539
+
connection with the Program, unless a warranty or assumption of liability accompanies
540
+
a copy of the Program in return for a fee.
541
+
542
+
_END OF TERMS AND CONDITIONS_
543
+
544
+
## How to Apply These Terms to Your New Programs
545
+
546
+
If you develop a new program, and you want it to be of the greatest possible use to
547
+
the public, the best way to achieve this is to make it free software which everyone
548
+
can redistribute and change under these terms.
549
+
550
+
To do so, attach the following notices to the program. It is safest to attach them
551
+
to the start of each source file to most effectively state the exclusion of warranty;
552
+
and each file should have at least the “copyright” line and a pointer to
553
+
where the full notice is found.
554
+
555
+
<one line to give the program's name and a brief idea of what it does.>
556
+
Copyright (C) <year> <name of author>
557
+
558
+
This program is free software: you can redistribute it and/or modify
559
+
it under the terms of the GNU General Public License as published by
560
+
the Free Software Foundation, either version 3 of the License, or
561
+
(at your option) any later version.
562
+
563
+
This program is distributed in the hope that it will be useful,
564
+
but WITHOUT ANY WARRANTY; without even the implied warranty of
565
+
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
566
+
GNU General Public License for more details.
567
+
568
+
You should have received a copy of the GNU General Public License
569
+
along with this program. If not, see <http://www.gnu.org/licenses/>.
570
+
571
+
Also add information on how to contact you by electronic and paper mail.
572
+
573
+
If the program does terminal interaction, make it output a short notice like this
574
+
when it starts in an interactive mode:
575
+
576
+
<program> Copyright (C) <year> <name of author>
577
+
This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
578
+
This is free software, and you are welcome to redistribute it
579
+
under certain conditions; type 'show c' for details.
580
+
581
+
The hypothetical commands `show w` and `show c` should show the appropriate parts of
582
+
the General Public License. Of course, your program's commands might be different;
583
+
for a GUI interface, you would use an “about box”.
584
+
585
+
You should also get your employer (if you work as a programmer) or school, if any, to
586
+
sign a “copyright disclaimer” for the program, if necessary. For more
587
+
information on this, and how to apply and follow the GNU GPL, see
588
+
<<http://www.gnu.org/licenses/>>.
589
+
590
+
The GNU General Public License does not permit incorporating your program into
591
+
proprietary programs. If your program is a subroutine library, you may consider it
592
+
more useful to permit linking proprietary applications with the library. If this is
593
+
what you want to do, use the GNU Lesser General Public License instead of this
594
+
License. But first, please read
595
+
<<http://www.gnu.org/philosophy/why-not-lgpl.html>>.
+5
NAMESPACE
+5
NAMESPACE
+12
R/BigNum-package.R
+12
R/BigNum-package.R
···
1
+
#' @keywords internal
2
+
"_PACKAGE"
3
+
4
+
## usethis namespace: start
5
+
#' @import S7
6
+
#' @importFrom rlang env
7
+
## usethis namespace: end
8
+
NULL
9
+
10
+
# enable usage of <S7_object>@name in package code
11
+
#' @rawNamespace if (getRversion() < "4.3.0") importFrom("S7", "@")
12
+
NULL
+214
R/big_num.R
+214
R/big_num.R
···
1
+
node_or_na <- function(value) is.na(value) || S7_inherits(value, node) # predicate to check if `nd` is a node or NA
2
+
3
+
node <- new_class("node",
4
+
package = "BigNum",
5
+
properties = list(
6
+
VALUE = new_property(
7
+
class_numeric, # TODO: make this a generic? Swap to integers here?
8
+
getter = function(self) self@VALUE
9
+
),
10
+
e = new_property(class_environment, getter = function(self) self@e),
11
+
nxt = new_property(class_any,
12
+
getter = function(self) {
13
+
self@e$nxt
14
+
},
15
+
setter = function(self, value) {
16
+
my_env <- self@e
17
+
my_env$nxt <- value
18
+
19
+
self
20
+
}
21
+
)
22
+
),
23
+
# TODO: fix this validator too
24
+
validator = function(self) {
25
+
if (!node_or_na(self@nxt)) {
26
+
"@nxt must be a `node` object or `NA`."
27
+
}
28
+
if (!is.numeric(self@VALUE) || length(self@VALUE) != 1) {
29
+
"@VALUE must be a `numeric` vector of length 1."
30
+
}
31
+
},
32
+
constructor = function(VALUE, nxt = NA) {
33
+
force(VALUE)
34
+
# if (VALUE != floor(VALUE)) warning("Coercing value to integer")
35
+
VALUE <- as.integer(VALUE)
36
+
force(nxt)
37
+
new_object(S7_object(), VALUE = VALUE, e = rlang::env(nxt = nxt))
38
+
}
39
+
)
40
+
41
+
linked_list <- new_class("linked_list",
42
+
package = "BigNum",
43
+
properties = list(
44
+
head = new_property(
45
+
node,
46
+
getter = function(self) self@e$head,
47
+
setter = function(self, value) {
48
+
# TODO: kick up to error?
49
+
warning("@head should not be set manually", call. = FALSE)
50
+
51
+
self@e$head <- value
52
+
self
53
+
}
54
+
),
55
+
tail = new_property(node,
56
+
getter = function(self) self@e$tail,
57
+
setter = function(self, value) {
58
+
warning("@tail should not be set manually", call. = FALSE)
59
+
60
+
self@e$tail <- value
61
+
self
62
+
}
63
+
),
64
+
length = new_property(class_numeric, getter = function(self) self@e$length, setter = function(self, value) self@e$length <- value),
65
+
e = new_property(class_environment)
66
+
), validator = function(self) {
67
+
# TODO: validation might be broken?
68
+
if (!node_or_na(self@head)) {
69
+
"@head must be a `node` object or `NA`."
70
+
} else if (!node_or_na(self@head)) {
71
+
"@tail must be a `node` object or `NA`."
72
+
}
73
+
}, constructor = function(num = NULL) {
74
+
if (is.null(num) || num == "") {
75
+
return(new_object(S7_object(), e = rlang::env(head = NA, tail = NA, length = 0)))
76
+
}
77
+
78
+
extract_digit_to_node <- function(len) node(as.integer(substring(num, len, len))) # TODO: throw error if the char isn't numeric
79
+
80
+
len <- nchar(num)
81
+
nodes <- lapply(len:1, function(i) extract_digit_to_node(i))
82
+
83
+
if (len != 1) {
84
+
for (i in (len - 1):1) {
85
+
nodes[[i]]@nxt <- nodes[[i + 1]]
86
+
}
87
+
}
88
+
89
+
e <- rlang::env(head = nodes[[1]], tail = nodes[[len]], length = len)
90
+
91
+
S7::new_object(S7::S7_object(), e = e)
92
+
}
93
+
)
94
+
95
+
big_num <- new_class("big_num",
96
+
package = "BigNum",
97
+
properties = list(
98
+
ll = new_property(linked_list, getter = function(self) self@ll)
99
+
),
100
+
constructor = function(num = "") {
101
+
S7::new_object(S7::S7_object(), ll = linked_list(num))
102
+
}
103
+
)
104
+
105
+
is.na <- new_external_generic("base", "is.na", "x")
106
+
method(is.na, node) <- function(x) !S7_inherits(x, node)
107
+
108
+
append <- new_generic("append", "x", function(x, ll, ...) S7_dispatch())
109
+
method(append, node) <- function(x, ll) {
110
+
suppressWarnings(
111
+
if (is.na(ll@head)) {
112
+
ll@head <- x
113
+
ll@tail <- x
114
+
} else {
115
+
ll@tail@nxt <- x
116
+
ll@tail <- x
117
+
}
118
+
)
119
+
120
+
# TODO: what does this error mean and why does this still work if ignored
121
+
# the attributes do exist in the environment so I'm not using rlang::env properly
122
+
# Error in `@<-.S7_object`:
123
+
# \! Tried to remove non-existent element from pairlist
124
+
try(ll@length <- ll@length + 1, silent = TRUE)
125
+
126
+
invisible(ll)
127
+
}
128
+
method(append, class_numeric) <- function(x, ll) {
129
+
stopifnot(x < 10 && x >= 0)
130
+
append(node(x), ll)
131
+
}
132
+
133
+
append_to_start <- new_generic("append_to_start", "x", function(x, ll, ...) S7_dispatch())
134
+
method(append_to_start, node) <- function(x, ll) {
135
+
suppressWarnings(
136
+
if (is.na(ll@head)) {
137
+
ll@head <- x
138
+
ll@tail <- x
139
+
} else {
140
+
x@nxt <- ll@head
141
+
ll@head <- x
142
+
}
143
+
)
144
+
145
+
try(ll@length <- ll@length + 1, silent = TRUE)
146
+
147
+
invisible(ll)
148
+
}
149
+
method(append_to_start, class_numeric) <- function(x, ll) {
150
+
stopifnot(x < 10 && x >= 0)
151
+
append_to_start(node(x), ll)
152
+
}
153
+
154
+
print <- new_external_generic("base", "print", "x")
155
+
method(print, linked_list) <- function(x) {
156
+
current <- x@head
157
+
while (!is.na(current)) {
158
+
cat(current@VALUE, "-> ")
159
+
current <- current@nxt
160
+
}
161
+
cat("NA\n")
162
+
163
+
invisible(x)
164
+
}
165
+
166
+
method(print, big_num) <- function(x) {
167
+
len <- x@ll@length
168
+
169
+
if (len == 0) {
170
+
cat("NA\n")
171
+
return(invisible(x))
172
+
}
173
+
174
+
stack <- character(len)
175
+
current <- x@ll@head
176
+
177
+
for (i in len:1) {
178
+
stack[i] <- current@VALUE
179
+
current <- current@nxt
180
+
}
181
+
182
+
string <- paste0(stack, collapse = "")
183
+
cat(string)
184
+
185
+
invisible(x)
186
+
}
187
+
188
+
`+` <- new_external_generic("base", "+", c("e1", "e2"))
189
+
# TODO: write this
190
+
method(`+`, list(big_num, big_num)) <- function(e1, e2) {
191
+
sum <- big_num()
192
+
}
193
+
194
+
method(`+`, list(big_num, class_numeric)) <- function(e1, e2) {
195
+
e1 + big_num(e2)
196
+
}
197
+
198
+
method(`+`, list(class_numeric, big_num)) <- function(e1, e2) {
199
+
big_num(e1) + e2
200
+
}
201
+
202
+
# x <- big_num("")
203
+
# x@ll
204
+
# len <- x@ll@length
205
+
# stack <- character(len)
206
+
# current <- x@ll@head
207
+
208
+
# for (i in len:1) {
209
+
# stack[i] <- current@VALUE
210
+
# current <- current@nxt
211
+
# }
212
+
213
+
# string <- paste0(stack, collapse = "")
214
+
# cat(string)
+16
-1
README.md
+16
-1
README.md
+15
man/BigNum-package.Rd
+15
man/BigNum-package.Rd
···
1
+
% Generated by roxygen2: do not edit by hand
2
+
% Please edit documentation in R/BigNum-package.R
3
+
\docType{package}
4
+
\name{BigNum-package}
5
+
\alias{BigNum}
6
+
\alias{BigNum-package}
7
+
\title{BigNum: A S7 Showcase}
8
+
\description{
9
+
A toy package designed to showcase and serve as a reference/tutorial for S7 development. To be used in conjunction with the S7 package website.
10
+
}
11
+
\author{
12
+
\strong{Maintainer}: Visruth Srimath Kandali \email{visruth@gmail.com} (\href{https://orcid.org/0009-0005-9097-0688}{ORCID})
13
+
14
+
}
15
+
\keyword{internal}