3.4 KiB
[flat.map.access]
23 Containers library [containers]
23.6 Container adaptors [container.adaptors]
23.6.8 Class template flat_map [flat.map]
23.6.8.6 Access [flat.map.access]
constexpr mapped_type& operator[](const key_type& x);
Effects: Equivalent to: return try_emplace(x).first->second;
constexpr mapped_type& operator[](key_type&& x);
Effects: Equivalent to: return try_emplace(std::move(x)).first->second;
template<class K> constexpr mapped_type& operator[](K&& x);
Constraints: The qualified-id Compare::is_transparent is valid and denotes a type.
Effects: Equivalent to: return try_emplace(std::forward(x)).first->second;
constexpr mapped_type& at(const key_type& x); constexpr const mapped_type& at(const key_type& x) const;
Returns: A reference to the mapped_type corresponding to x in *this.
Throws: An exception object of type out_of_range if no such element is present.
Complexity: Logarithmic.
template<class K> constexpr mapped_type& at(const K& x); template<class K> constexpr const mapped_type& at(const K& x) const;
Constraints: The qualified-id Compare::is_transparent is valid and denotes a type.
Preconditions: The expression find(x) is well-formed and has well-defined behavior.
Returns: A reference to the mapped_type corresponding tox in *this.
Throws: An exception object of type out_of_range if no such element is present.
Complexity: Logarithmic.