https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64609
Bug ID: 64609
Summary: No -Wbool-compare warning on "(a = 0 && 0) <= 4"
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
This might not be a bug, but a feature request. There is no -Wbool-compare
warning for the following code.
$: cat s.c
int a;
void fn1() { ((a = 0 && 0) <= 4); }
$:
$: gcc-trunk -c s.c -Wbool-compare
$:
$: clang-trunk -c s.c -Wno-unused-value
s.c:2:28: warning: comparison of constant 4 with boolean expression is always
true [-Wtautological-constant-out-of-range-compare]
void fn1() { ((a = 0 && 0) <= 4); }
~~~~~~~~~~~~ ^ ~
1 warning generated.
$:
$:
