https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65623
Bug ID: 65623
Summary: Incorrect location of error messages on calling copy
constructor of unique_ptr
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
When I was compiling a large class file, gcc emit an error that I called the
copy constructor of unique_ptr. It took me a while to figure out the cause of
the error. I find that clang pinpoints this error.
I think this error message can be improved with a precise location of the
error. The current location is just the end of the initializer list.
$: cat t.cc
#include <memory>
using namespace std;
class A {
const int a;
const unique_ptr<A> b;
const int c;
public:
A(const A& copy) : a(copy.a),
b(copy.b),
c(copy.c) {
}
};
$: g++-4.9 -std=c++11 -c t.cc
t.cc: In copy constructor ‘A::A(const A&)’:
t.cc:11:13: error: use of deleted function ‘std::unique_ptr<_Tp,
_Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = A; _Dp =
std::default_delete<A>]’
c(copy.c) {
^
In file included from /usr/local/gcc-4.9.0/include/c++/4.9.0/memory:81:0,
from t.cc:1:
/usr/local/gcc-4.9.0/include/c++/4.9.0/bits/unique_ptr.h:356:7: note: declared
here
unique_ptr(const unique_ptr&) = delete;
^
$: clang-trunk -std=c++11 -c t.cc
t.cc:10:5: error: call to deleted constructor of 'const unique_ptr<A>'
b(copy.b),
^ ~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/unique_ptr.h:273:7:
note: 'unique_ptr' has been explicitly marked deleted here
unique_ptr(const unique_ptr&) = delete;
^
1 error generated.
$:
