1429. unordered_set constructor accepting an allocator as a single parameter should be explicit

Section: 23.5.6 [unord.set] Status: C++11 Submitter: Japan Opened: 2010-08-25 Last modified: 2016-01-28

Priority: Not Prioritized

View all issues with C++11 status.

Discussion:

Addresses JP-12

Constructor accepting an allocator as a single parameter should be qualified as explicit.

[ Resolved in Rapperswil by a motion to directly apply the words from the ballot comment in N3102. ]

Proposed resolution:

Add explicit.

namespace std {
template <class Key,
class Hash = hash<Key>,
class Pred = std::equal_to<Key>,
class Alloc = std::allocator<Key> >
class unordered_set
{
public:
...
explicit unordered_set(const Allocator&);