Compiling the following program:
int printf(const char *fmt, ...);
class MyCompare {
public:
MyCompare() { }
bool operator() (const int a, const int b) const {
return a > b;
}
};
template<class Comp>
class Other {
public:
Other (const Comp &c) : c_(c) { }
void* doSomething();
private:
Comp c_;
};
template<class Comp>
void* Other<Comp>::doSomething() {
return &c_;
}
int main(int argc, char **argv) {
MyCompare c;
Other<MyCompare> other(c);
printf("%p\n", other.doSomething());
return 0;
}
yields the following warning:
test.cc: In function 'int main(int, char**)':
test.cc:14: warning: 'c' is used uninitialized in this function
test.cc:27: note: 'c' was declared here
when compiled with the following command line:
g++ -Wall -c -O2 test.cc
However, c is initialized by the no argument constructor (further class
MyCompare does not actually have any member variables to initialize).
--
Summary: Compiler warns about uninitialized variable that is an
object with a constructor
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: nvachhar at google dot com
GCC build triplet: i686-unknown-linux-gnu
GCC host triplet: i686-unknown-linux-gnu
GCC target triplet: i686-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38851
