[#BloombergLP-bdlb-operator_eq-0da]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::operator==
:relfileprefix: ../../
:mrdocs:

Return whether the specified `lhs` and `rhs` have the same value.

== Synopsis

Declared in `<bdlb_nullablevalue.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class LHS_TYPE,
    class RHS_TYPE>
bool
operator==(
    xref:BloombergLP/bdlb/NullableValue.adoc[NullableValue<LHS_TYPE>] const& lhs,
    RHS_TYPE const& rhs)
requires (!NullableValue_DerivedFromOptional<RHS_TYPE>) &&
    requires { { *lhs == rhs } ‐> NullableValue_ConvertibleToBool; };
----

== Description

Return `true` if the specified `lhs` and `rhs` objects have the same value, and `false` otherwise. A nullable object and a value of some type have the same value if the nullable object is non‐null and its underlying value compares equal to the other value. Note that this function will fail to compile if `LHS_TYPE` and `RHS_TYPE` are not compatible.

== Return Value

`true` if the operands have the same value, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lhs*
| left‐hand operand
| *rhs*
| right‐hand operand
|===


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