[#bitset_detail-operator_minus-0f]
= xref:bitset_detail.adoc[bitset_detail]::operator‐
:relfileprefix: ../
:mrdocs:

Return an object with the binary AND NOT between respective bits from a and b.

== Synopsis

Declared in `<util/bitset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:bitset_detail/IntBitSet.adoc[IntBitSet]
operator‐(
    xref:bitset_detail/IntBitSet.adoc[IntBitSet] const& a,
    xref:bitset_detail/IntBitSet.adoc[IntBitSet] const& b) noexcept;
----

[NOTE]
====
This function is a https://en.cppreference.com/w/cpp/language/friend[hidden friend] of xref:bitset_detail/IntBitSet.adoc[IntBitSet], declared only inside that class: it can be found only through argument-dependent lookup.
====

== Return Value

The set difference a minus b.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| The bitset to keep bits from.
| *b*
| The bitset whose set bits are removed.
|===


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