https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121348
Bug ID: 121348
Summary: `vector::resize(n, value)` incorrectly requires the
element type to be assignable
Product: gcc
Version: 14.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: iamsupermouse at mail dot ru
Target Milestone: ---
The following code doesn't compile, because `vector::resize(n, value)` for some
reason tries to call the assignment operator of the element type:
#include <vector>
struct A
{
A() {}
A(const A &) {}
A &operator=(const A &) = delete;
};
int main()
{
std::vector<A> v;
v.resize(42, A{});
}
This only happens with libstdc++, while libc++ and MSVC STL are happy with
this. Tested on libstdc++ 15 and trunk.
The single-argument `resize()` also works fine.
The standard requires the element type to be Cpp17CopyInsertable for this
method, and it seems that doesn't require assignability.
