styleguide/c++/c++11.html - Issue 1963853003: Allow everything in <tuple>.

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Issue 1963853003: Allow everything in <tuple>. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 4 years, 7 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <!--	2 <!--

3 Copyright 2014 The Chromium Authors. All rights reserved.	3 Copyright 2014 The Chromium Authors. All rights reserved.

4 Use of this source code is governed by a BSD-style license that can be	4 Use of this source code is governed by a BSD-style license that can be

5 found in the LICENSE file.	5 found in the LICENSE file.

6 -->	6 -->

7 <html>	7 <html>

8 <head>	8 <head>

9 <meta charset="utf-8">	9 <meta charset="utf-8">

10 <title>C++11 use in Chromium</title>	10 <title>C++11 use in Chromium</title>

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386	386

387 <tr>	387 <tr>

388 <td>Initializer Lists</td>	388 <td>Initializer Lists</td>

389 <td><code>std::initializer_list<T></code></td>	389 <td><code>std::initializer_list<T></code></td>

390 <td>Allows containers to be initialized with aggregate elements</td>	390 <td>Allows containers to be initialized with aggregate elements</td>

391 <td><a href="http://en.cppreference.com/w/cpp/utility/initializer_list">std::ini tializer_list</a></td>	391 <td><a href="http://en.cppreference.com/w/cpp/utility/initializer_list">std::ini tializer_list</a></td>

392 <td>Be cautious adding new constructors which take these, as they can hide non-i nitializer_list constructors in undesirable ways; see Effective Modern C++ Item 7 for more.</td>	392 <td>Be cautious adding new constructors which take these, as they can hide non-i nitializer_list constructors in undesirable ways; see Effective Modern C++ Item 7 for more.</td>

393 </tr>	393 </tr>

394	394

395 <tr>	395 <tr>

396 <td>Lexicographical struct comparison</td>

397 <td><code>tie(a, b, c) <<br>  tie(rhs.a, rhs.b, rhs.c)</code></td>

398 <td>Idiom for <code>operator<</code> implementation</td>

399 <td><a href="http://en.cppreference.com/w/cpp/utility/tuple/tie">std::tie</a></t d>

400 <td>General use of <code>std::tie</code> for unpacking or multiple assignments i s still not allowed. <a href="https://groups.google.com/a/chromium.org/d/topic/c xx/3DZ64dIMRTY/discussion">Discussion thread</a></td>

401 </tr>

402

403 <tr>

404 <td>Math functions</td>	396 <td>Math functions</td>

405 <td>All C++11 features in <code><cmath></code>, e.g.:<br/>	397 <td>All C++11 features in <code><cmath></code>, e.g.:<br/>

406 <code>INFINITY</code>, <code>NAN</code>, <code>FP_NAN</code><br/>	398 <code>INFINITY</code>, <code>NAN</code>, <code>FP_NAN</code><br/>

407 <code>float_t</code>, <code>double_t</code><br/>	399 <code>float_t</code>, <code>double_t</code><br/>

408 <code>fmax</code>, <code>fmin</code>, <code>trunc</code>, <code>round</code><br/ >	400 <code>fmax</code>, <code>fmin</code>, <code>trunc</code>, <code>round</code><br/ >

409 <code>isinf</code>, <code>isnan</code><br/></td>	401 <code>isinf</code>, <code>isnan</code><br/></td>

410 <td>Useful for math-related code</td>	402 <td>Useful for math-related code</td>

411 <td><a href="http://en.cppreference.com/w/cpp/header/cmath"><cmath></a></t d>	403 <td><a href="http://en.cppreference.com/w/cpp/header/cmath"><cmath></a></t d>

412 <td><a href="https://groups.google.com/a/chromium.org/forum/#!topic/cxx/P-1bFBXM eUk">Discussion thread</a></td>	404 <td><a href="https://groups.google.com/a/chromium.org/forum/#!topic/cxx/P-1bFBXM eUk">Discussion thread</a></td>

413 </tr>	405 </tr>

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444 <code>is_const</code>, <code>is_pod</code>, <code>is_unsigned</code><br/>	436 <code>is_const</code>, <code>is_pod</code>, <code>is_unsigned</code><br/>

445 <code>is_default_constructible</code>, <code>is_move_constructible</code>, <code >is_copy_assignable</code><br/>	437 <code>is_default_constructible</code>, <code>is_move_constructible</code>, <code >is_copy_assignable</code><br/>

446 <code>enable_if</code>, <code>conditional</code>, <code>result_of</code><br/></t d>	438 <code>enable_if</code>, <code>conditional</code>, <code>result_of</code><br/></t d>

447 <td>Allows compile-time inspection of the properties of types</td>	439 <td>Allows compile-time inspection of the properties of types</td>

448 <td><a href="http://en.cppreference.com/w/cpp/header/type_traits"><type_trait s></a></td>	440 <td><a href="http://en.cppreference.com/w/cpp/header/type_traits"><type_trait s></a></td>

449 <td>Note that not all type traits are available on all platforms (e.g. <code>std ::underlying_type</code> doesn't work in libstdc++4.6). Use judiciously. <a href ='https://groups.google.com/a/chromium.org/forum/#!topic/cxx/vCxo4tZNd_M'>Discus sion thread</a></td>	441 <td>Note that not all type traits are available on all platforms (e.g. <code>std ::underlying_type</code> doesn't work in libstdc++4.6). Use judiciously. <a href ='https://groups.google.com/a/chromium.org/forum/#!topic/cxx/vCxo4tZNd_M'>Discus sion thread</a></td>

450 </tr>	442 </tr>

451	443

452 <tr>	444 <tr>

453 <td>Tuples</td>	445 <td>Tuples</td>

454 <td><code>std::tuple</code></td>	446 <td>All C++11 features in <code><tuple></code>, e.g. <code>std::tie</code> and <code>std::tuple</code>.</td>

455 <td>A fixed-size ordered collection of values of mixed types</td>	447 <td>A fixed-size ordered collection of values of mixed types</td>

456 <td><a href="http://en.cppreference.com/w/cpp/utility/tuple">std::tuple</a></td>	448 <td><a href="http://en.cppreference.com/w/cpp/header/tuple"><tuple></a></t d>

457 <td>Prefer over <a href="https://crbug.com/554987">base::Tuple</a>.</td>	449 <td>Prefer <code>std::tuple</code> over <a href="https://crbug.com/554987"><code >base::Tuple</code></a>.</td>

458 </tr>	450 </tr>

459	451

460 <tr>	452 <tr>

461 <td>Unordered Associative Containers</td>	453 <td>Unordered Associative Containers</td>

462 <td><code>std::unordered_set</code>, <code>std::unordered_map</code>, <code>std: :unordered_multiset</code>, <code>std::unordered_multimap</code></td>	454 <td><code>std::unordered_set</code>, <code>std::unordered_map</code>, <code>std: :unordered_multiset</code>, <code>std::unordered_multimap</code></td>

463 <td>Allows efficient containers of key/value pairs</td>	455 <td>Allows efficient containers of key/value pairs</td>

464 <td><a href="http://en.cppreference.com/w/cpp/container/unordered_map">std::unor dered_map</a>, <a href="http://en.cppreference.com/w/cpp/container/unordered_set ">std::unordered_set</a></td>	456 <td><a href="http://en.cppreference.com/w/cpp/container/unordered_map">std::unor dered_map</a>, <a href="http://en.cppreference.com/w/cpp/container/unordered_set ">std::unordered_set</a></td>

465 <td>Per the <a href="https://google.github.io/styleguide/cppguide.html#std_hash" >Google Style Guide</a>, specify custom hashers instead of specializing <code>st d::hash</code> for custom types. <a href="https://groups.google.com/a/chromium.o rg/forum/#!topic/cxx/nCdjQqnouO4">Discussion thread</a>.</td>	457 <td>Per the <a href="https://google.github.io/styleguide/cppguide.html#std_hash" >Google Style Guide</a>, specify custom hashers instead of specializing <code>st d::hash</code> for custom types. <a href="https://groups.google.com/a/chromium.o rg/forum/#!topic/cxx/nCdjQqnouO4">Discussion thread</a>.</td>

466 </tr>	458 </tr>

467	459

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925 <td><a href="http://en.cppreference.com/w/cpp/locale/wstring_convert">std::wstri ng_convert</a>, <a href="http://en.cppreference.com/w/cpp/locale/wbuffer_convert ">std::wbuffer_convert</a>, <a href="http://en.cppreference.com/w/cpp/locale/cod ecvt_utf8">std::codecvt_utf8</a>, <a href="http://en.cppreference.com/w/cpp/loca le/codecvt_utf16">std::codecvt_utf16</a>, <a href="http://en.cppreference.com/w/ cpp/locale/codecvt_utf8_utf16">std::codecvt_utf8_utf16</a></td>	917 <td><a href="http://en.cppreference.com/w/cpp/locale/wstring_convert">std::wstri ng_convert</a>, <a href="http://en.cppreference.com/w/cpp/locale/wbuffer_convert ">std::wbuffer_convert</a>, <a href="http://en.cppreference.com/w/cpp/locale/cod ecvt_utf8">std::codecvt_utf8</a>, <a href="http://en.cppreference.com/w/cpp/loca le/codecvt_utf16">std::codecvt_utf16</a>, <a href="http://en.cppreference.com/w/ cpp/locale/codecvt_utf8_utf16">std::codecvt_utf8_utf16</a></td>

926 <td>Non-UTF-8 text is banned by the <a href="https://google.github.io/styleguide /cppguide.html#Non-ASCII_Characters">Google Style Guide</a>. However, may be use ful for consuming non-ASCII data.</td>	918 <td>Non-UTF-8 text is banned by the <a href="https://google.github.io/styleguide /cppguide.html#Non-ASCII_Characters">Google Style Guide</a>. However, may be use ful for consuming non-ASCII data.</td>

927 </tr>	919 </tr>

928	920

929 </tbody>	921 </tbody>

930 </table>	922 </table>

931	923

932 </div>	924 </div>

933 </body>	925 </body>

934 </html>	926 </html>

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