http://llvm.org/bugs/show_bug.cgi?id=10898
Summary: extraneous parentheses warnings
Product: clang
Version: trunk
Platform: PC
OS/Version: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Just updated to Xcode 4.2 beta 7.
I have the following code.
int buf_plus_null = 3 + 3 + unicode() ? 2 : 0;
Produced the following warning:
warning: operator '?:' has lower
precedence than '+'; '+' will be evaluated first [-Wparentheses]
int buf_plus_null = 3 + 3 + unicode() ? 2 : 0;
~~~~~~~~~~~~~~~~~ ^
XYZ.h:925:47: note: place parentheses around the '+'
expression to silence this warning
int buf_plus_null = 3 + 3 + unicode() ? 2 : 0;
^
( )
XYZ.h:925:47: note: place parentheses around the '?:'
expression to evaluate it first
int buf_plus_null = 3 + 3 + unicode() ? 2 : 0;
^
( )
Updated the code to have the proper parentheses to the following (Suggestion
1):
int buf_plus_null = (3 + 3 + unicode()) ? 2 : 0;
The following warning is produced:
warning: operator '?:' has lower
precedence than '+'; '+' will be evaluated first [-Wparentheses]
int buf_plus_null = (3 + 3 + unicode()) ? 2 : 0;
~~~~~~~~~~~~~~~~~~~ ^
XYZ.h:925:49: note: place parentheses around the '+'
expression to silence this warning
int buf_plus_null = (3 + 3 + unicode()) ? 2 : 0;
^
( )
XYZ.h:925:49: note: place parentheses around the '?:'
expression to evaluate it first
int buf_plus_null = (3 + 3 + unicode()) ? 2 : 0;
^
( )
The 2nd suggestion is syntactically incorrect, and the 1st seems un-necessarily
verbose. Suggestion 1 also does not fix the warning.
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