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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Formatter/ObjC] Line break between exclamation mark ! and method call if line length = ColumnLimit+1"
href="https://bugs.llvm.org/show_bug.cgi?id=37110">37110</a>
</td>
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<tr>
<th>Summary</th>
<td>[Formatter/ObjC] Line break between exclamation mark ! and method call if line length = ColumnLimit+1
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Formatter
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david@dzhang.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>Line breaking behavior for lines of length ColumnLimit+1 of the form ![obj
methodCall] chooses to break the line between the bang/not operator and the
method call, which is undesirable.
----------------------------------------
input.m:
- (void)test {
// these three with variables wrap as expected
if
(!someLongBooleanVariableNameUsedInAnIf01234567801234567801234567801234567890123456789)
return;
if (someLongBooleanVariableNameUsedInAnIf ||
!aDifferentLongBooleanVariable11)
return;
if (someLongBooleanVariableNameUsedInAnIf ||
!aDifferentLongBooleanVariable111)
return;
// these two with method calls wrap badly
if ([self someLongMethodThatReturnsBoolean] || ![self
aDifferentBooleanMethod])
return;
if (![self
someLongMethodThatReturnsBoolean0123456780123456780123456780123456])
return;
}
$ clang-format -style=llvm input.m
- (void)test {
// these three with variables wrap as expected
if
(!someLongBooleanVariableNameUsedInAnIf01234567801234567801234567801234567890123456789)
return;
if (someLongBooleanVariableNameUsedInAnIf ||
!aDifferentLongBooleanVariable11)
return;
if (someLongBooleanVariableNameUsedInAnIf ||
!aDifferentLongBooleanVariable111)
return;
// these two with method calls wrap badly
if ([self someLongMethodThatReturnsBoolean] || !
[self
aDifferentBooleanMethod])
return;
if (!
[self
someLongMethodThatReturnsBoolean0123456780123456780123456780123456])
return;
}
$ clang-format --version
clang-format version 7.0.0 (tags/google/stable/2018-01-11)
----------------------------------------
Notice that if I use variables, they wrap as expected when the lines are 80 and
81 chars long, but when using method calls ending at column 81, the formatter
causes bad line breaking.
I have not been able to find a combination of config options that avoids this
behavior.</pre>
</div>
</p>
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