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]

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constexpr mapped_type& operator[](const key_type& x);
1
#
Effects: Equivalent to: return try_emplace(x).first->second;
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constexpr mapped_type& operator[](key_type&& x);
2
#
Effects: Equivalent to: return try_emplace(std​::​move(x)).first->second;
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template<class K> constexpr mapped_type& operator[](K&& x);
3
#
Constraints: The qualified-id Compare​::​is_transparent is valid and denotes a type.
4
#
Effects: Equivalent to: return try_emplace(std​::​forward<K>(x)).first->second;
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constexpr mapped_type& at(const key_type& x); constexpr const mapped_type& at(const key_type& x) const;
5
#
Returns: A reference to the mapped_type corresponding to x in *this.
6
#
Throws: An exception object of type out_of_range if no such element is present.
7
#
Complexity: Logarithmic.
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template<class K> constexpr mapped_type& at(const K& x); template<class K> constexpr const mapped_type& at(const K& x) const;
8
#
Constraints: The qualified-id Compare​::​is_transparent is valid and denotes a type.
9
#
Returns: A reference to the mapped_type corresponding to x in *this.
11
#
Throws: An exception object of type out_of_range if no such element is present.
12
#
Complexity: Logarithmic.

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