[#BloombergLP-bslx-VersionFunctions_NonFundamentalImpl-0b-maxSupportedBdexVersion-0c]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslx.adoc[bslx]::xref:BloombergLP/bslx/VersionFunctions_NonFundamentalImpl-0b.adoc[VersionFunctions_NonFundamentalImpl]::maxSupportedBdexVersion
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Return the maximum valid BDEX format version, as indicated by the specified `versionSelector`, to be passed to the `bdexStreamOut` method while streaming an object of the (template parameter) type `TYPE`. Note that it is highly recommended that `versionSelector` be formatted as "YYYYMMDD", a date representation. Also note that `versionSelector` should be a _compile_‐time‐chosen value that selects a format version supported by both externalizer and unexternalizer. See the `bslx` package‐level documentation for more information on BDEX streaming of value‐semantic types and containers.

== Synopsis

Declared in `<bslx_versionfunctions.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
int
maxSupportedBdexVersion(int versionSelector);
----


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