<!DOCTYPE html>
<html>
<head>
</head>
<body>
<dl style="line-height: 1.5; margin-left: 2em">
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Author</dt>
<dd style="margin-left: 8.5em">Kouhei Sutou <kou****@clear*****></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Date</dt>
<dd style="margin-left: 8.5em">2012-03-16 10:02:21 +0900 (Fri, 16 Mar 2012)</dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">New Revision</dt>
<dd style="margin-left: 8.5em"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671">a9f322b78bd83ab895025c38d5208f467bc95671</a></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Log</dt>
<dd style="margin-left: 8.5em"><pre style="border: 1px solid #aaa; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; padding: 0.5em">doc coding-style: add about use intialize list</pre></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Modified files</dt>
<dd style="margin-left: 8.5em">
<ul>
<li><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#diff-0">doc/source/developer/coding_style.rst</a></li>
</ul>
</dd>
</dl>
<div class="diff-section" style="clear: both">
<table style="border-collapse: collapse; border: 1px solid #aaa">
<thead>
<tr class="diff-header" style="border: 1px solid #aaa">
<td colspan="3">
<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal"><span class="diff-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre"> Modified: doc/source/developer/coding_style.rst (+35 -0)</span>
<span class="diff-header-mark" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">===================================================================</span>
</pre>
</td>
</tr>
</thead>
<tbody>
<tr>
<th class="diff-line-number" style="border: 1px solid #aaa">
<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal"><span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0L484">...</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0L485">485</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0L486">486</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0L487">487</a></span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
<span class="diff-line-number-nothing" style="display: block; white-space: pre"> </span>
</pre>
</th>
<th class="diff-line-number" style="border: 1px solid #aaa">
<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal"><span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R484">...</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R485">485</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R486">486</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R487">487</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R488">488</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R489">489</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R490">490</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R491">491</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R492">492</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R493">493</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R494">494</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R495">495</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R496">496</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R497">497</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R498">498</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R499">499</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R500">500</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R501">501</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R502">502</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R503">503</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R504">504</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R505">505</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R506">506</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R507">507</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R508">508</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R509">509</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R510">510</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R511">511</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R512">512</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R513">513</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R514">514</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R515">515</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R516">516</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R517">517</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R518">518</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R519">519</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R520">520</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R521">521</a></span>
<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/mroonga/mroonga/commit/a9f322b78bd83ab895025c38d5208f467bc95671#L0R522">522</a></span>
</pre>
</th>
<td class="diff-content" style="border: 1px solid #aaa">
<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal"><span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -485,3 +485,38 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">C++では真偽値に ``bool`` を使うためこのような状況は発生し</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> if (!memcmp(value1, value2, value_size)) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> printf("same value!\n");</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+初期化</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+------</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+メンバー変数の初期化には初期化リストを用いる</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+無駄な処理を省くためにコンストラクターでのメンバー変数の初期化には初期化リストを用いる。初期化リストを用いないとコンストラクターの処理とコピーコンストラクター・代入処理が行われたりなど非効率である。（後述）</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+よい例:</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ class Table</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ Table(const char *name);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ std::string name_;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ Table::Table(const char *name) :</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ name_(name)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+悪い例（ ``std::string(name)`` のところでコンストラクターが動き、 ``name_ = ...`` のところで代入演算子が動いて2回初期化している）:</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ class Table</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ Table(const char *name);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ std::string name_;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ Table::Table(const char *name)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ name_ = std::string(name);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
</pre>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>