[#nlohmann-ordered_map-2constructor-03]
= xref:nlohmann.adoc[nlohmann]::xref:nlohmann/ordered_map.adoc[ordered_map]::ordered_map
:relfileprefix: ../../
:mrdocs:

Constructors

== Synopses

Declared in `<nlohmann/ordered_map.hpp>`

constructs an empty ordered_map


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:nlohmann/ordered_map/2constructor-0d.adoc[ordered_map]() noexcept(noexcept(Container()));
----

[.small]#xref:nlohmann/ordered_map/2constructor-0d.adoc[_» more..._]#

copy constructor


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:nlohmann/ordered_map/2constructor-0f.adoc[ordered_map](xref:nlohmann/ordered_map.adoc[ordered_map] const& other) = default;
----

[.small]#xref:nlohmann/ordered_map/2constructor-0f.adoc[_» more..._]#

move constructor


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:nlohmann/ordered_map/2constructor-01.adoc[ordered_map](xref:nlohmann/ordered_map.adoc[ordered_map]&& other) noexcept(/* see-below */) = default;
----

[.small]#xref:nlohmann/ordered_map/2constructor-01.adoc[_» more..._]#

constructs an empty ordered_map using the given allocator


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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explicit
xref:nlohmann/ordered_map/2constructor-04.adoc[ordered_map](Allocator const& alloc) noexcept(noexcept(Container(alloc)));
----

[.small]#xref:nlohmann/ordered_map/2constructor-04.adoc[_» more..._]#

constructs an ordered_map from an initializer list of key‐value pairs


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:nlohmann/ordered_map/2constructor-09.adoc[ordered_map](
    std::initializer_list<value_type> init,
    Allocator const& alloc = Allocator());
----

[.small]#xref:nlohmann/ordered_map/2constructor-09.adoc[_» more..._]#

constructs an ordered_map with the elements in the range [first, last)]


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class It>
xref:nlohmann/ordered_map/2constructor-07.adoc[ordered_map](
    It first,
    It last,
    Allocator const& alloc = Allocator());
----

[.small]#xref:nlohmann/ordered_map/2constructor-07.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *other* [in]
| ordered_map to copy from
| *alloc* [in]
| allocator to use for the underlying container
| *init* [in]
| initializer list of key‐value pairs to insert
| *first* [in]
| iterator to the first element to insert
| *last* [in]
| iterator past the last element to insert
|===


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