[#BloombergLP-bdlde-Utf8Util-isValid-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlde.adoc[bdlde]::xref:BloombergLP/bdlde/Utf8Util.adoc[Utf8Util]::isValid
:relfileprefix: ../../../
:mrdocs:

Return whether `string` contains only valid UTF‐8 characters.

== Synopsis

Declared in `<bdlde_utf8util.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
isValid(
    char const** invalidString,
    std::string_view const& string);
----

== Description

Return `true` if the specified `string` contains only valid UTF‐8 characters, and `false` otherwise. If `string` contains invalid UTF‐8, load into the specified `invalidString` the address of the byte after the last valid code point traversed; `invalidString` is unaffected if `string` contains only valid UTF‐8. `string` need not be null‐terminated and can contain embedded null bytes.

== Return Value

`true` if `string` is valid UTF‐8, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *invalidString*
| if non‐null, set to after the last valid code point
| *string*
| UTF‐8 string view to validate
|===


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