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vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Correctness_of_including_Stream_and_Exception"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Correctness of including Stream and Exception</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-Correctness_of_including_Stream_and_Exception-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cons_cell_is_not_a_fundamental_data_type" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cons_cell_is_not_a_fundamental_data_type"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Cons cell is not a fundamental data type</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">4 comments</span> <ul id="toc-Cons_cell_is_not_a_fundamental_data_type-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bignum_is_not_a_data_type,_but_a_variant_of_integer" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bignum_is_not_a_data_type,_but_a_variant_of_integer"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Bignum is not a data type, but a variant of integer</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-Bignum_is_not_a_data_type,_but_a_variant_of_integer-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Multi-tiered_navbox" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Multi-tiered_navbox"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Multi-tiered navbox</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Multi-tiered_navbox-sublist" class="vector-toc-list"> </ul> </li> <li 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class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/25px-Wikimedia_Compsci_Working_Group_Icon.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/38px-Wikimedia_Compsci_Working_Group_Icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/50px-Wikimedia_Compsci_Working_Group_Icon.svg.png 2x" data-file-width="354" data-file-height="354" /></a></span></td><td class="wpb-header-combined"><a href="/wiki/Wikipedia:WikiProject_Computer_science" title="Wikipedia:WikiProject Computer science">Computer science</a> </td></tr><tr><td class="mbox-text wpb-main" colspan="2"><table><tbody><tr><td class="mbox-image wpb-image"><span typeof="mw:File"><a href="/wiki/File:Wikimedia_Compsci_Working_Group_Icon.svg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/80px-Wikimedia_Compsci_Working_Group_Icon.svg.png" decoding="async" width="80" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/120px-Wikimedia_Compsci_Working_Group_Icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Wikimedia_Compsci_Working_Group_Icon.svg/160px-Wikimedia_Compsci_Working_Group_Icon.svg.png 2x" data-file-width="354" data-file-height="354" /></a></span></td><td class="mbox-text">This template is within the scope of <b><a href="/wiki/Wikipedia:WikiProject_Computer_science" title="Wikipedia:WikiProject Computer science">WikiProject Computer science</a></b>, a collaborative effort to improve the coverage of <a href="/wiki/Computer_science" title="Computer science">Computer science</a> related articles on Wikipedia. If you would like to participate, please visit the project page, where you can join <a href="/wiki/Wikipedia_talk:WikiProject_Computer_science" title="Wikipedia talk:WikiProject Computer science">the discussion</a> and see a list of open tasks.<span class="metadata wpb-metadata"><span class="wpb-project">Computer science</span><span class="wpb-project_link">Wikipedia:WikiProject Computer science</span><span class="wpb-banner_name">Template:WikiProject Computer science</span><span class="wpb-assessment_cat">Computer science</span></span></td><td class="mbox-empty-cell"></td></tr><tr><td colspan="3" style="padding:0"><table class="mw-collapsible mw-collapsed" style="background:transparent;width:100%"><tbody><tr><th style="text-align:left;padding:0.2em 2px 0.2em 0">Things you can help <a href="/wiki/Wikipedia:WikiProject_Computer_science" title="Wikipedia:WikiProject Computer science">WikiProject Computer science</a> with:</th></tr><tr><td style="text-align:left;padding:5px;background-color:white;border:1px solid #c0c090;margin-top:5px"> <table style="background:none;color:inherit;width:auto;"> <tbody><tr> <td style="vertical-align:top;"> <span typeof="mw:File"><a href="/wiki/File:Nuvola_apps_korganizer.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/e/e6/Nuvola_apps_korganizer.svg/50px-Nuvola_apps_korganizer.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/e/e6/Nuvola_apps_korganizer.svg/75px-Nuvola_apps_korganizer.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/e/e6/Nuvola_apps_korganizer.svg/100px-Nuvola_apps_korganizer.svg.png 2x" data-file-width="128" data-file-height="128" /></a></span><br /><div style="width: 55px; height: 0px;"></div> </td> <td> <div style="position: relative; left: 0px; margin-right: 0px; z-index: 15;">Here are some tasks awaiting attention: <ul style="font-size: 100%; margin: 0px; padding: 0.3em 0px 0.3em 25px;"> <li><b><i><a href="/wiki/Wikipedia:Requested_articles" title="Wikipedia:Requested articles">Article requests</a></i> :</b> <div> <ul><li><a href="/wiki/Wikipedia:Requested_articles/Applied_arts_and_sciences/Computer_science,_computing,_and_Internet" title="Wikipedia:Requested articles/Applied arts and sciences/Computer science, computing, and Internet">Requested articles/Applied arts and sciences/Computer science, computing, and Internet</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Cleanup" title="Wikipedia:Cleanup">Cleanup</a></i> :</b> <div> <ul><li><a href="/wiki/Category:Computer_science_articles_needing_attention" title="Category:Computer science articles needing attention">Computer science articles needing attention</a></li> <li><a href="/wiki/Category:Computer_science_articles_needing_expert_attention" title="Category:Computer science articles needing expert attention">Computer science articles needing expert attention</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Basic_copyediting" title="Wikipedia:Basic copyediting">Copyedit</a></i> :</b> <div> <ul><li><a href="/wiki/Computing" title="Computing">Computing</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Writing_better_articles" title="Wikipedia:Writing better articles">Expand</a></i> :</b> <div> <ul><li><a href="/wiki/Computer_science" title="Computer science">Computer science</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Manual_of_Style/Infoboxes" title="Wikipedia:Manual of Style/Infoboxes">Infobox</a></i> :</b> <div> <ul><li><a href="/wiki/Category:Computer_science_articles_without_infoboxes" title="Category:Computer science articles without infoboxes">Computer science articles without infoboxes</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Maintenance" title="Wikipedia:Maintenance">Maintain</a></i> :</b> <div> <ul><li><a href="/wiki/Timeline_of_computing_2020%E2%80%93present" title="Timeline of computing 2020–present">Timeline of computing 2020–present</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Requested_pictures" title="Wikipedia:Requested pictures">Photo</a></i> :</b> <div> <ul><li>Find pictures for the biographies of computer scientists (see <a href="/wiki/List_of_computer_scientists" title="List of computer scientists">List of computer scientists</a>)</li> <li><a href="/wiki/Category:Computing_articles_needing_images" title="Category:Computing articles needing images">Computing articles needing images</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">Stubs</a></i> :</b> <div> <ul><li><a href="/wiki/Category:Computer_science_stubs" title="Category:Computer science stubs">Computer science stubs</a></li></ul> </div></li><li><b><i><a href="/wiki/Wikipedia:Reliable_sources" title="Wikipedia:Reliable sources">Unreferenced</a></i> :</b> <div> <ul><li><a href="/wiki/Wikipedia:WikiProject_Computer_science/Unreferenced_BLPs" title="Wikipedia:WikiProject Computer science/Unreferenced BLPs">WikiProject Computer science/Unreferenced BLPs</a></li></ul> </div></li><li><b><i>Project-related</i> :</b> <div> <ul><li>Tag all relevant articles in <a href="/wiki/Category:Computer_science" title="Category:Computer science">Category:Computer science</a> and sub-categories with <span class="nowrap">{{</span><a href="/wiki/Template:WikiProject_Computer_science" title="Template:WikiProject Computer science">WikiProject Computer science</a><span class="nowrap">}}</span></li></ul> </div></li> </ul> </div> </td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Template_rationale" data-mw-thread-id="h-Template_rationale-2009-05-09T15:44:00.000Z"><span data-mw-comment-start="" id="h-Template_rationale-2009-05-09T15:44:00.000Z"></span>Template rationale<span data-mw-comment-end="h-Template_rationale-2009-05-09T15:44:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=1" title="Edit section: Template rationale"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-09T15:44:00.000Z-Template_rationale"></span>This bottom-style navbox template is intended to organize the articles about computer science <a href="/wiki/Data_type" title="Data type">data types</a>. </p><p>Data types are a <b>programming language</b> concept, and should not be confused with the mathematical concepts that they (try to) emulate, nor the internal representation (encodings and data strcutures) that are used to implement them. Thus, for example, <a href="/wiki/Tuple" title="Tuple">tuple</a> is a mathematical concept; <a href="/wiki/Record_(computer_science)" title="Record (computer science)">record (computer science)</a> is both a data type in many languages and a data strcuture. <a href="/wiki/Linked_list" title="Linked list">Linked list</a> and <a href="/wiki/Tree_(computer_science)" class="mw-redirect" title="Tree (computer science)">Tree (computer science)</a> are data structures, while <a href="/wiki/List_(computing)" class="mw-redirect" title="List (computing)">list (computing)</a> is an abstract data type or abstract data structure that <i>may be</i> a data type in some languages. Also <a href="/wiki/Twos_complement" class="mw-redirect" title="Twos complement">twos complement</a> is one possible representation of the data type <a href="/wiki/Integer_(computer_science)" title="Integer (computer science)">integer (computer science)</a> which is an emulation of a mathematical <a href="/wiki/Integer" title="Integer">integer</a>. Admittedly, the dividing line between data types and data strcutures is often blurred, but there is a <a href="/wiki/Template:Data_structures" title="Template:Data structures">Template:Data structures</a> for data strcutures. </p><p>I propose that this template only lists only the most common data types and "top-level" articles, leaving the specialized versions to be accessed through them. So, for example, <a href="/wiki/Unsigned_integer" class="mw-redirect" title="Unsigned integer">unsigned integer</a> should not be listed directly; readers can get to it either through the <a href="/wiki/Integer_(computer_science)" title="Integer (computer science)">integer (computer science)</a>, or through the <a href="/wiki/Category:Data_types" title="Category:Data types">"Data types" category</a>. Trying to list all data types that have ever been used in any programming language would make the list too big and turn it into a duplicte of the <a href="/wiki/Category:Data_types" title="Category:Data types">category</a> page, frustrating the very purpose of the navbox (provide a <i>structured</i> access to the subject). It would also make this navbox hard to maintain. On the other hand, given its low profile, this navbox can probably be included in almost every article in the "Data types" category. </p><p>All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-09T15:44:00.000Z-Template_rationale" class="ext-discussiontools-init-timestamplink">15:44, 9 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-09T15:44:00.000Z-Template_rationale"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-09T15:44:00.000Z-Template_rationale"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Correctness_of_including_Stream_and_Exception" data-mw-thread-id="h-Correctness_of_including_Stream_and_Exception-2009-05-10T03:52:00.000Z"><span data-mw-comment-start="" id="h-Correctness_of_including_Stream_and_Exception-2009-05-10T03:52:00.000Z"></span>Correctness of including Stream and Exception<span data-mw-comment-end="h-Correctness_of_including_Stream_and_Exception-2009-05-10T03:52:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=2" title="Edit section: Correctness of including Stream and Exception"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Cybercobra-2009-05-10T03:52:00.000Z-Correctness_of_including_Stream_and_Exception"></span>I find the classification of Stream and Exception as datatypes questionable. --<a href="/wiki/User:Cybercobra" title="User:Cybercobra">Cybercobra</a> (<a href="/wiki/User_talk:Cybercobra" title="User talk:Cybercobra">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Cybercobra-2009-05-10T03:52:00.000Z-Correctness_of_including_Stream_and_Exception" class="ext-discussiontools-init-timestamplink">03:52, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Cybercobra-2009-05-10T03:52:00.000Z-Correctness_of_including_Stream_and_Exception"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Cybercobra-2009-05-10T03:52:00.000Z-Correctness_of_including_Stream_and_Exception"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-10T17:13:00.000Z-Cybercobra-2009-05-10T03:52:00.000Z"></span>I am not convinced either that they deserve to be mentioned in the template. However, Exception was a built-in data type in <a href="/wiki/Modula-3" title="Modula-3">Modula-3</a>, and <a href="/wiki/Ada_(programming_language)" title="Ada (programming language)">Ada</a>, and perhaps Common lisp. I recall at least one language where streams (there called "channels" were built-in types; owe you a reference to that. All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-10T17:13:00.000Z-Cybercobra-2009-05-10T03:52:00.000Z" class="ext-discussiontools-init-timestamplink">17:13, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-10T17:13:00.000Z-Cybercobra-2009-05-10T03:52:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-10T17:13:00.000Z-Cybercobra-2009-05-10T03:52:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Cons_cell_is_not_a_fundamental_data_type" data-mw-thread-id="h-Cons_cell_is_not_a_fundamental_data_type-2009-05-10T17:30:00.000Z"><span data-mw-comment-start="" id="h-Cons_cell_is_not_a_fundamental_data_type-2009-05-10T17:30:00.000Z"></span>Cons cell is not a fundamental data type<span data-mw-comment-end="h-Cons_cell_is_not_a_fundamental_data_type-2009-05-10T17:30:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=3" title="Edit section: Cons cell is not a fundamental data type"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-10T17:30:00.000Z-Cons_cell_is_not_a_fundamental_data_type"></span>"Cons cell" is not a data type. It is a special case of record (like complex, interval, rational, and infinitly many more), or like the nodes of a linked list. Jus as "node of lined list" does not deserve an article, a "cons cell" does not either. Besides the <a href="/wiki/Cons" title="Cons">cons</a> article is more about the cons function than the data type. The main built-in LISP data type is <a href="/wiki/S-expression" title="S-expression">S-expression</a>, not <a href="/wiki/Cons_cell" class="mw-redirect" title="Cons cell">cons cell</a>, and should be listed as such. All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-10T17:30:00.000Z-Cons_cell_is_not_a_fundamental_data_type" class="ext-discussiontools-init-timestamplink">17:30, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-10T17:30:00.000Z-Cons_cell_is_not_a_fundamental_data_type"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-10T17:30:00.000Z-Cons_cell_is_not_a_fundamental_data_type"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Cybercobra-2009-05-10T23:30:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"></span>Ok, then I would likewise hold that sexprs are just a particular language-specific physical representation of record and thus don't deserve to be in the list. They're a serialization representation, not a unique data type. --<a href="/wiki/User:Cybercobra" title="User:Cybercobra">Cybercobra</a> (<a href="/wiki/User_talk:Cybercobra" title="User talk:Cybercobra">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Cybercobra-2009-05-10T23:30:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z" class="ext-discussiontools-init-timestamplink">23:30, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Cybercobra-2009-05-10T23:30:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Cybercobra-2009-05-10T23:30:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"></span></dd> <dd><span data-mw-comment-start="" id="c-Cybercobra-2009-05-10T23:39:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"></span>I would say that the cons cell is a particularly notable special-case of a record. Lisp and some other languages lack a pointer datatype, but make up for this by having cons cells and create all composite datatypes out of just the humble cons cell, which is fundamental/primitive and cannot be created in the language itself (the cute toy implementation using lambdas notwithstanding). And you're being a bit inconsistent. Complex, interval, and rational are in the template, yet as you yourself say, they too are special cases of record; so your reasoning for not including cons cell doesn't quite make sense to me. Not that I think complex and friends should be removed from the template. --<a href="/wiki/User:Cybercobra" title="User:Cybercobra">Cybercobra</a> (<a href="/wiki/User_talk:Cybercobra" title="User talk:Cybercobra">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Cybercobra-2009-05-10T23:39:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z" class="ext-discussiontools-init-timestamplink">23:39, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Cybercobra-2009-05-10T23:39:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Cybercobra-2009-05-10T23:39:00.000Z-Jorge_Stolfi-2009-05-10T17:30:00.000Z"></span> <dl><dd><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-11T03:37:00.000Z-Cybercobra-2009-05-10T23:39:00.000Z"></span>I am striving to find a consitent rationale for this navbox, but connfess that it still eludes me. The best I can think of is: it is about "<b>main</b> <b>built-in</b> data types and datatype definition tools provided by the <b>specification</b> of significant programming languages". It must be limited to "built-in" types because otherwise the set is infinite. The types must be provided by the "specification" because the types used in the "implementation" of those languages is also potentially infinte. The "datatype definition tools" are built-in constructs like "record", "array", "reference", that a programmer can use to define other types. Obviously a type that is built-in in one language may be a library type in other; the concept can be defined only relative to a certain set of languages. We must require "bona-fide" languages because weird languages may have very weird data types.</dd> <dd>So, coming to the questions: Complex and rational should be listed because there are languages that provide built-in support for them in the syntax, not merely as a library module (including FORTRAN IV, which did not even have records). Intervals are more questionable but they are built-in for Mathematica at least, with standard arithmetic ops.</dd> <dd>Finally, on cons cell versus S-expressions: the main data type of LISP is definitely the S-expression. S-expressions are not the same as lists of other languages for many reasons. For instance atoms are a subtype of S-expresions; the CAR and CDR are restricted to have the same data type; the semantics of 'eq' implies that an S-expression can have sharing in both the car and cdr, and it may terminate with an atom other than NIL; etc.</dd> <dd>The cons cell is a record type that is used internally in <b>one</b> implementation of the S-expression type. There are other implementations, for example replacing N successive cons-cells by an array with N+1 pointers (N CARs and the last CDR). Admittedly these alternative implementations are not very popular, but they have been serioulsy proposed. Moreover, in pure LISP one cannot have circular lists; that constraint comes naturally with S-expressions, but if cons-cell were the primitive type, then it would be a rather artificial one.</dd> <dd>But I am getting tired of this discussion. I do not intend to edit this template any more; I have more productive ways to spend my time. Unfortunately "datatypology" is one of those "philosophical" disciplines where the object of study is mosty in the people's head: one invents arbitrary categories or viewpoints and then spends all the time trying to fit reality into them. Is the tomato a fruit or vegetable? Is Pluto a planet? Are viruses alive? Should integers be viewed as objects? I have wasted enough time already in my life with that sort of inanities... All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-11T03:37:00.000Z-Cybercobra-2009-05-10T23:39:00.000Z" class="ext-discussiontools-init-timestamplink">03:37, 11 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-11T03:37:00.000Z-Cybercobra-2009-05-10T23:39:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-11T03:37:00.000Z-Cybercobra-2009-05-10T23:39:00.000Z"></span></dd></dl></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Bignum_is_not_a_data_type,_but_a_variant_of_integer" data-mw-thread-id="h-Bignum_is_not_a_data_type,_but_a_variant_of_integer-2009-05-10T17:33:00.000Z"><span id="Bignum_is_not_a_data_type.2C_but_a_variant_of_integer"></span><span data-mw-comment-start="" id="h-Bignum_is_not_a_data_type,_but_a_variant_of_integer-2009-05-10T17:33:00.000Z"></span>Bignum is not a data type, but a variant of integer<span data-mw-comment-end="h-Bignum_is_not_a_data_type,_but_a_variant_of_integer-2009-05-10T17:33:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=4" title="Edit section: Bignum is not a data type, but a variant of integer"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-10T17:33:00.000Z-Bignum_is_not_a_data_type,_but_a_variant_of_integer"></span>Bignum is not a distinct type; like <a href="/wiki/Short_integer" class="mw-redirect" title="Short integer">short integer</a> and <a href="/wiki/Unsigned_integer" class="mw-redirect" title="Unsigned integer">unsigned integer</a>, it is a flavor of <a href="/wiki/Integer_(computer_science)" title="Integer (computer science)">integer (computer science)</a> --- and also of <a href="/wiki/Floating_point" class="mw-redirect" title="Floating point">floating point</a>, <a href="/wiki/Rational_data_type" title="Rational data type">rational data type</a>, <a href="/w/index.php?title=Interva&action=edit&redlink=1" class="new" title="Interva (page does not exist)">interva</a>, etc. All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-10T17:33:00.000Z-Bignum_is_not_a_data_type,_but_a_variant_of_integer" class="ext-discussiontools-init-timestamplink">17:33, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-10T17:33:00.000Z-Bignum_is_not_a_data_type,_but_a_variant_of_integer"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-10T17:33:00.000Z-Bignum_is_not_a_data_type,_but_a_variant_of_integer"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Cybercobra-2009-05-11T01:57:00.000Z-Jorge_Stolfi-2009-05-10T17:33:00.000Z"></span>Yes, but it's a unique/distinct flavor of number. One could equally argue that floating-point and fixed-point are mere implementations of <a href="/wiki/Real_number" title="Real number">Real numbers</a>. --<a href="/wiki/User:Cybercobra" title="User:Cybercobra">Cybercobra</a> (<a href="/wiki/User_talk:Cybercobra" title="User talk:Cybercobra">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Cybercobra-2009-05-11T01:57:00.000Z-Jorge_Stolfi-2009-05-10T17:33:00.000Z" class="ext-discussiontools-init-timestamplink">01:57, 11 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Cybercobra-2009-05-11T01:57:00.000Z-Jorge_Stolfi-2009-05-10T17:33:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Cybercobra-2009-05-11T01:57:00.000Z-Jorge_Stolfi-2009-05-10T17:33:00.000Z"></span> <dl><dd>But real numbers is a mathematical concept, not a data type. Let's not mix the worlds. No programming language implements a 'real number' data type.</dd></dl></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Multi-tiered_navbox" data-mw-thread-id="h-Multi-tiered_navbox-2009-05-10T18:35:00.000Z"><span data-mw-comment-start="" id="h-Multi-tiered_navbox-2009-05-10T18:35:00.000Z"></span>Multi-tiered navbox<span data-mw-comment-end="h-Multi-tiered_navbox-2009-05-10T18:35:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=5" title="Edit section: Multi-tiered navbox"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Jorge_Stolfi-2009-05-10T18:35:00.000Z-Multi-tiered_navbox"></span>Check the navbox at the bottom of <a href="/wiki/Carbon_monoxide_poisoning" title="Carbon monoxide poisoning">carbon monoxide poisoning</a>. If we have to expand this navbox, that may be a good way to do it. </p><p>However, the work spent on editing navboxes (-8 and fighting about whether a <a href="/wiki/Tomato" title="Tomato">tomato</a> is a <a href="/wiki/Fruit" title="Fruit">fruit</a> or a <a href="/wiki/Vegetable" title="Vegetable">vegetable</a> 8-) would be much better spent editing the data type articles themselves --- some are ina very sorry state. All the best, --<a href="/wiki/User:Jorge_Stolfi" title="User:Jorge Stolfi">Jorge Stolfi</a> (<a href="/wiki/User_talk:Jorge_Stolfi" title="User talk:Jorge Stolfi">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Jorge_Stolfi-2009-05-10T18:35:00.000Z-Multi-tiered_navbox" class="ext-discussiontools-init-timestamplink">18:35, 10 May 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Jorge_Stolfi-2009-05-10T18:35:00.000Z-Multi-tiered_navbox"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Jorge_Stolfi-2009-05-10T18:35:00.000Z-Multi-tiered_navbox"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="We_need_a_better_categorization_for_the_stuff_in_"other"" data-mw-thread-id="h-We_need_a_better_categorization_for_the_stuff_in_"other"-2009-08-18T05:18:00.000Z"><span id="We_need_a_better_categorization_for_the_stuff_in_.22other.22"></span><span data-mw-comment-start="" id="h-We_need_a_better_categorization_for_the_stuff_in_"other"-2009-08-18T05:18:00.000Z"></span>We need a better categorization for the stuff in "other"<span data-mw-comment-end="h-We_need_a_better_categorization_for_the_stuff_in_"other"-2009-08-18T05:18:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=6" title="Edit section: We need a better categorization for the stuff in "other""><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Pohta_ce-am_pohtit-2009-08-18T05:18:00.000Z-We_need_a_better_categorization_for_the_stuff_in_"other""></span>Intuitively, some of those are <a href="/wiki/Primitive_data_type" title="Primitive data type">primitive data types</a>, but that article seems hotly contested. Also, <a href="/wiki/First-class_function" title="First-class function">first-class function</a> is actually defined using a type constructor (the arrow), so it's not clear that it qualifies as primitive, although this type constructor is built-in with special meaning; but then so are other type constructors like * in <a href="/wiki/Product_type" title="Product type">product type</a>. We need to look for some refs for terminology; always a big hassle. <a href="/wiki/User:Pohta_ce-am_pohtit" class="mw-redirect" title="User:Pohta ce-am pohtit">Pcap</a> <a href="/wiki/User_talk:Pohta_ce-am_pohtit" class="mw-redirect" title="User talk:Pohta ce-am pohtit"><small>ping</small></a> <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Pohta_ce-am_pohtit-2009-08-18T05:18:00.000Z-We_need_a_better_categorization_for_the_stuff_in_"other"" class="ext-discussiontools-init-timestamplink">05:18, 18 August 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Pohta_ce-am_pohtit-2009-08-18T05:18:00.000Z-We_need_a_better_categorization_for_the_stuff_in_"other""><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Pohta_ce-am_pohtit-2009-08-18T05:18:00.000Z-We_need_a_better_categorization_for_the_stuff_in_"other""></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Missing_types." data-mw-thread-id="h-Missing_types.-2013-06-26T18:47:00.000Z"><span data-mw-comment-start="" id="h-Missing_types.-2013-06-26T18:47:00.000Z"></span>Missing types.<span data-mw-comment-end="h-Missing_types.-2013-06-26T18:47:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=7" title="Edit section: Missing types."><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-99.153.64.179-2013-06-26T18:47:00.000Z-Missing_types."></span>Template is missing <a href="/wiki/Inductive_type" title="Inductive type">inductive type</a> and <a href="/wiki/Intuitionistic_type_theory#Equality_type" title="Intuitionistic type theory">equality type</a>. <a href="/wiki/Special:Contributions/99.153.64.179" title="Special:Contributions/99.153.64.179">99.153.64.179</a> (<a href="/wiki/User_talk:99.153.64.179" title="User talk:99.153.64.179">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-99.153.64.179-2013-06-26T18:47:00.000Z-Missing_types." class="ext-discussiontools-init-timestamplink">18:47, 26 June 2013 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-99.153.64.179-2013-06-26T18:47:00.000Z-Missing_types."><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-99.153.64.179-2013-06-26T18:47:00.000Z-Missing_types."></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Abstractions_over_bit(s)" data-mw-thread-id="h-Abstractions_over_bit(s)-2016-07-19T11:43:00.000Z"><span id="Abstractions_over_bit.28s.29"></span><span data-mw-comment-start="" id="h-Abstractions_over_bit(s)-2016-07-19T11:43:00.000Z"></span>Abstractions over bit(s)<span data-mw-comment-end="h-Abstractions_over_bit(s)-2016-07-19T11:43:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=8" title="Edit section: Abstractions over bit(s)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Ushkin_N-2016-07-19T11:43:00.000Z-Abstractions_over_bit(s)"></span>I left single link to <a href="/wiki/Bit" title="Bit">bit</a> because previous links were imprecise compared to <a href="/wiki/Template:Information_units" title="Template:Information units">Template:Information units</a>. It is wrong to keep silent about <i>platform-dependency</i> at <a class="mw-selflink selflink">Template talk:Data types</a>. <a href="/wiki/User:Ushkin_N" title="User:Ushkin N">Ushkin N</a> (<a href="/wiki/User_talk:Ushkin_N" title="User talk:Ushkin N">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-Ushkin_N-2016-07-19T11:43:00.000Z-Abstractions_over_bit(s)" class="ext-discussiontools-init-timestamplink">11:43, 19 July 2016 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Ushkin_N-2016-07-19T11:43:00.000Z-Abstractions_over_bit(s)"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Ushkin_N-2016-07-19T11:43:00.000Z-Abstractions_over_bit(s)"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Timestamp" data-mw-thread-id="h-Timestamp-2018-11-23T16:04:00.000Z"><span data-mw-comment-start="" id="h-Timestamp-2018-11-23T16:04:00.000Z"></span>Timestamp<span data-mw-comment-end="h-Timestamp-2018-11-23T16:04:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template_talk:Data_types&action=edit&section=9" title="Edit section: Timestamp"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-RobbieIanMorrison-2018-11-23T16:04:00.000Z-Timestamp"></span>Just wondered whether <a href="/wiki/Timestamp" title="Timestamp">timestamp</a> data types should be included in this template? Perhaps that depends on the underlying page being present? But the subpage on <a href="/wiki/Timestamp#Digital_timestamps" title="Timestamp">digital timestamps</a> should suffice in the interim? HTH. <a href="/wiki/User:RobbieIanMorrison" title="User:RobbieIanMorrison">RobbieIanMorrison</a> (<a href="/wiki/User_talk:RobbieIanMorrison" title="User talk:RobbieIanMorrison">talk</a>) <a href="https://en.wikipedia.org/wiki/Template_talk:Data_types#c-RobbieIanMorrison-2018-11-23T16:04:00.000Z-Timestamp" class="ext-discussiontools-init-timestamplink">16:04, 23 November 2018 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-RobbieIanMorrison-2018-11-23T16:04:00.000Z-Timestamp"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-RobbieIanMorrison-2018-11-23T16:04:00.000Z-Timestamp"></span> </p>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Template_talk:Data_types&oldid=1229653728">https://en.wikipedia.org/w/index.php?title=Template_talk:Data_types&oldid=1229653728</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Template-Class_Computer_science_pages" title="Category:Template-Class Computer science pages">Template-Class Computer science pages</a></li><li><a href="/wiki/Category:NA-importance_Computer_science_pages" title="Category:NA-importance Computer science pages">NA-importance Computer science pages</a></li><li><a href="/wiki/Category:WikiProject_Computer_science_articles" title="Category:WikiProject Computer science articles">WikiProject Computer science articles</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 18 June 2024, at 00:24<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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