http://llvm.org/bugs/show_bug.cgi?id=22197
Bug ID: 22197
Summary: False warning: unsequenced modification and access to
Product: clang
Version: 3.5
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 13667
--> http://llvm.org/bugs/attachment.cgi?id=13667&action=edit
Source code showing the false warning
When compiling the attached code with -Wunsequenced, clang issues a warning
that I believe is incorrect:
---
$ c++ -Wunsequenced -c test.cpp
test.cpp:5:12: warning: unsequenced modification and access to 'i'
[-Wunsequenced]
if ((i = f1(), true) && (j = f2(i))) {
^ ~
1 warning generated.
---
There should be sequence points between the operands of the comma-operator and
those of &&.
If you wonder about "true", the code is generated and the condition will not
always be constant true.
Interestingly, the same code does not issue a warning when compiled as C code.
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