diff options
Diffstat (limited to 'absl/container/internal/common.h')
| -rw-r--r-- | absl/container/internal/common.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/absl/container/internal/common.h b/absl/container/internal/common.h index 5037d803..030e9d4a 100644 --- a/absl/container/internal/common.h +++ b/absl/container/internal/common.h @@ -138,6 +138,7 @@ class node_handle<Policy, PolicyTraits, Alloc, absl::void_t<typename Policy::mapped_type>> : public node_handle_base<PolicyTraits, Alloc> { using Base = node_handle_base<PolicyTraits, Alloc>; + using slot_type = typename PolicyTraits::slot_type; public: using key_type = typename Policy::key_type; @@ -145,8 +146,11 @@ class node_handle<Policy, PolicyTraits, Alloc, constexpr node_handle() {} - auto key() const -> decltype(PolicyTraits::key(this->slot())) { - return PolicyTraits::key(this->slot()); + // When C++17 is available, we can use std::launder to provide mutable + // access to the key. Otherwise, we provide const access. + auto key() const + -> decltype(PolicyTraits::mutable_key(std::declval<slot_type*>())) { + return PolicyTraits::mutable_key(this->slot()); } mapped_type& mapped() const { |