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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Clang-format should use UTF-8 character's width shown in editor rather than storage byte size."
   href="https://bugs.llvm.org/show_bug.cgi?id=47989">47989</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang-format should use UTF-8 character's width shown in editor rather than storage byte size.
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Formatter
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>panzhongxian@126.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When I input some UTF-8 character rather than simple ASCII, I find that
clang-format will take the character's length as how many bytes expressed,
rather than as the length show in terminal.

For example:

`测` is stored in 3 bytes, but it takes 2 ASCII space in vim or other editors.

The expected formatted code should be as follow:

#define test   \
  /* 测试 */   \
  "aa"         \
  "bb"         \
  "bb"

But what I really get is as follow:

#define test   \
  /* 测试 */ \
  "aa"         \
  "bb"         \
  "bb"

I have tryed both clang-format 11.0.0 and the newest 12.0.0.

I think the width on screen should be used instead of its storage byte size.(Or
is there any configuration to control this?)</pre>
        </div>
      </p>


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