http://llvm.org/bugs/show_bug.cgi?id=10168
Summary: -Wunused gives multiple errors for unused variable in
template
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
template<typename T>
struct S {
void f() {
int a;
}
};
int main() {
S<int>().f();
S<double>().f();
}
tmp.cpp:4:9: warning: unused variable 'a' [-Wunused-variable]
int a;
^
tmp.cpp:4:9: warning: unused variable 'a' [-Wunused-variable]
tmp.cpp:9:12: note: in instantiation of member function 'S<int>::f' requested
here
S<int>().f();
^
tmp.cpp:4:9: warning: unused variable 'a' [-Wunused-variable]
int a;
^
tmp.cpp:10:15: note: in instantiation of member function 'S<double>::f'
requested here
S<double>().f();
^
One warning is produced for the template definition, and one more is produced
for each instantiation. Strangely, we don't get the first warning for a
dependently-typed unused variable.
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