<html>
<head>
<base href="http://llvm.org/bugs/" />
</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 --- - False-positive warnings about BOOL conversions in Obj-C with -Wconversion"
href="http://llvm.org/bugs/show_bug.cgi?id=17208">17208</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>False-positive warnings about BOOL conversions in Obj-C with -Wconversion
</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>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>fourdman@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>CLANG_REVISION=188423
Steps: compile the test file (see below)
Expected: no warnings
Actual: 3 false-positive warnings
%
/Volumes/CSTree/foor/chromium/trunk/src/third_party/llvm-build/Release+Asserts/bin/clang
-x objective-c -arch i386 -std=gnu99 -fobjc-arc -Wconversion -iframework
Foundation -fobjc-abi-version=2 -O0 -c test.mm -o test.o
test.mm:17:14: warning: implicit conversion loses integer precision: 'int' to
'BOOL' (aka 'signed char') [-Wconversion]
self.a = !b; // Error 1
~ ^~
test.mm:21:14: warning: implicit conversion loses integer precision: 'int' to
'BOOL' (aka 'signed char') [-Wconversion]
self.a = (x == y); // Error 2
~ ^~~~~~~~
test.mm:23:14: warning: implicit conversion loses integer precision: 'int' to
'BOOL' (aka 'signed char') [-Wconversion]
self.a = (a_ || b); // Error 3
~ ^~~~~~~~~
3 warnings generated.
% cat test.mm
#import <Foundation/Foundation.h>
@interface Foo : NSObject
@property(assign, nonatomic) BOOL a;
- (void)qux;
@end
@implementation Foo
@synthesize a = a_;
- (void)qux {
BOOL b = NO;
self.a = !b; // Error 1
int x = 5;
int y = 4;
self.a = (x == y); // Error 2
self.a = (a_ || b); // Error 3
}
@end</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>