[#BloombergLP-bdlb-TopologicalSortUtil_Helper-Links-2constructor-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/TopologicalSortUtil_Helper.adoc[TopologicalSortUtil&lowbar;Helper]::xref:BloombergLP/bdlb/TopologicalSortUtil_Helper.adoc[Links]::Links
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Create a `Links` which holds empty predecessor and successor information&period; Optionally, specify an `allocator` for needed memory&period; If `allocator` is 0, use the globally supply default allocator instead&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;topologicalsortutil&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
Links(xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* allocator = 0);
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