https://llvm.org/bugs/show_bug.cgi?id=31373
Bug ID: 31373
Summary: -Wunused-variable does not detect unused condition
variable
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: richard-l...@metafoo.co.uk
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
-Wunused-variable does not warn on this case:
bool f();
void g() {
if (bool b = f()) {
// ...
}
}
GCC's version of the warning does. Presumably we're marking the variable as
'used' in the condition handling code; while that's technically correct, it
doesn't lead to the right outcome here.
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