[#bsl-binary_compose-d_fn1]
= xref:bsl.adoc[bsl]::xref:bsl/binary_compose.adoc[binary_compose]::d_fn1
:relfileprefix: ../../
:mrdocs:

First functor `f` in the composition `f(g1(x), g2(x))`.

== Synopsis

Declared in `<bslstp_exfunctional.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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OPERATION1 d_fn1;
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