[#BloombergLP-baljsn-Decoder_RequiredAttrsVisitor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/baljsn.adoc[baljsn]::Decoder_RequiredAttrsVisitor
:relfileprefix: ../../
:mrdocs:

This class provides a functor that finds and remembers all non‐optional sequence attributes.

== Synopsis

Declared in `<baljsn_decoder.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct Decoder_RequiredAttrsVisitor;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/baljsn/Decoder_RequiredAttrsVisitor/operator_call.adoc[`operator()`] 
| Record the specified `info` for the specified `value` if the attribute is required. Return 0 on success and a non‐zero value otherwise.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/baljsn/Decoder_RequiredAttrsVisitor/d_requiredAttributes_p.adoc[`d_requiredAttributes_p`] 
| Set of required attribute names collected by this visitor (not owned).
| xref:BloombergLP/baljsn/Decoder_RequiredAttrsVisitor/d_usesDefaultValueFlag.adoc[`d_usesDefaultValueFlag`] 
| Flag indicating whether default values are in use.
|===



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