[#llvm-idf_ext_begin]
= xref:llvm.adoc[llvm]::idf_ext_begin
:relfileprefix: ../
:mrdocs:

Return an external inverse depth‐first iterator at the entry of `G.`

== Synopsis

Declared in `<llvm/ADT/DepthFirstIterator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class T,
    class SetTy>
xref:llvm/idf_ext_iterator.adoc[idf_ext_iterator<T, SetTy>]
idf_ext_begin(
    T const& G,
    SetTy& S);
----

== Return Value

External inverse depth‐first iterator at the entry of `G.`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *G*
| Graph whose inverse edges are traversed.
| *S*
| Caller‐owned visited set.
|===


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