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List: kwin
Subject: Re: Review Request 115125: Fix compilation with clang
From: "Commit Hook" <null () kde ! org>
Date: 2014-01-19 18:19:22
Message-ID: 20140119181922.13923.71795 () probe ! kde ! org
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This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/115125/#review47721
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This review has been submitted with commit e94d8a04f00f9a5c010470954a4831220088532f \
by Fabian Kosmale to branch master.
- Commit Hook
On Jan. 19, 2014, 4:47 p.m., Fabian Kosmale wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/115125/
> -----------------------------------------------------------
>
> (Updated Jan. 19, 2014, 4:47 p.m.)
>
>
> Review request for kwin and Martin Gräßlin.
>
>
> Repository: kde-workspace
>
>
> Description
> -------
>
> Without the patch, compilation (with clang 3.3) fails with
> error: return type 'const QString' must match previous return type 'QString' when \
> lambda expression has unspecified explicit return type
> For an explanation why this happens, see \
> https://www.mail-archive.com/llvmbugs@cs.uiuc.edu/msg22245.html. GCC seems to \
> simply remove the const. In the patch I'm using a const_cast<QString &> to make the \
> compiler happy, but maybe creating a new QString and returning that one would be \
> clearer? The QString copy ctor is invoked anyway, as the deduced return type is \
> QString, and the result of the cast is still a reference.
>
> Diffs
> -----
>
> kwin/rules.cpp d09548b
>
> Diff: https://git.reviewboard.kde.org/r/115125/diff/
>
>
> Testing
> -------
>
> It still compiles with GCC; though I couldn't run the unit tests so far.
>
>
> Thanks,
>
> Fabian Kosmale
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/115125/">https://git.reviewboard.kde.org/r/115125/</a>
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<br />
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This review has been \
submitted with commit e94d8a04f00f9a5c010470954a4831220088532f by Fabian Kosmale to \
branch master.</pre> <br />
<p>- Commit Hook</p>
<br />
<p>On January 19th, 2014, 4:47 p.m. UTC, Fabian Kosmale wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" \
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<div>Review request for kwin and Martin Gräßlin.</div>
<div>By Fabian Kosmale.</div>
<p style="color: grey;"><i>Updated Jan. 19, 2014, 4:47 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
kde-workspace
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Without the patch, compilation (with clang 3.3) fails \
with
error: return type 'const QString' must match previous return type \
'QString' when lambda expression has unspecified explicit return type
For an explanation why this happens, see \
https://www.mail-archive.com/llvmbugs@cs.uiuc.edu/msg22245.html. GCC seems to simply \
remove the const. In the patch I'm using a const_cast<QString &> to \
make the compiler happy, but maybe creating a new QString and returning that one \
would be clearer? The QString copy ctor is invoked anyway, as the deduced return type \
is QString, and the result of the cast is still a reference.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">It still compiles with GCC; though I couldn't run the unit tests so \
far.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kwin/rules.cpp <span style="color: grey">(d09548b)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/115125/diff/" style="margin-left: \
3em;">View Diff</a></p>
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