bsl::map::map

Create a map having the (value_type) values obtained from the specified range. Ignore those those objects having a key equivalent to that which appears earlier in the sequence. Optionally specify a comparator used to order key‐value pairs contained in this object. If comparator is not supplied, a default‐constructed object of the (template parameter) type COMPARATOR is used. Optionally specify a basicAllocator used to supply memory. If basicAllocator is not supplied, a default‐constructed object of the (template parameter) type ALLOCATOR is used. If the type ALLOCATOR is bsl::allocator (the default), then basicAllocator, if supplied, shall be convertible to bslma::Allocator *. If the type ALLOCATOR is bsl::allocator and basicAllocator is not supplied, the currently installed default allocator is used. If values obtained from `range are ordered according to comparator, then this operation has O[N] complexity, where N is the number of values in the range; otherwise, this operation has O[N * log(N)] complexity. Note that RANGE must meet the requirements of an input range and the values from range must have a type matching or convertible to value_type.

Synopsis

Declared in <bslstl_map.h>

template<class RANGE>
map(
    std::from_range_t,
    RANGE&& range,
    COMPARATOR const& comparator = COMPARATOR(),
    ALLOCATOR const& basicAllocator = ALLOCATOR());

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