[#BloombergLP-bdlb-TopologicalSortUtil_Helper-sortImpl]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/TopologicalSortUtil_Helper.adoc[TopologicalSortUtil_Helper]::sortImpl
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Sort the input elements provided during construction in topological order and write the resulting linear ordered set into the specified `resultOutIter` and return `true`. If the sort is unsuccessful (the input is not an acyclic directed graph) write the nodes that have not been sorted to the specified `unsortedOutIter` output and return `false`. See `TopologicalSortUtil::sort` "iterators overload" for more detailed specification.

== Synopsis

Declared in `<bdlb_topologicalsortutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class OUTPUT_ITER,
    class UNSORTED_OUT_ITER>
bool
sortImpl(
    OUTPUT_ITER resultOutIter,
    UNSORTED_OUT_ITER unsortedOutIter);
----


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