[#HashVerifier]
= HashVerifier
:mrdocs:

Reads data from an underlying stream, while hashing the read data.

== Synopsis

Declared in `<hash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename Source>
class HashVerifier
    : public xref:HashWriter.adoc[HashWriter]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:HashWriter.adoc[HashWriter]`
| A writer stream (for serialization) that computes a 256‐bit hash.
|===

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:HashVerifier/2constructor.adoc[`HashVerifier`]         [.small]#[constructor]#
| Constructs a verifier that reads from and hashes an underlying source.
| xref:HashWriter/GetCheapHash.adoc[`GetCheapHash`] 
| Returns the first 64 bits from the resulting hash.
| xref:HashWriter/GetHash.adoc[`GetHash`] 
| Compute the double‐SHA256 hash of all data written to this object.
| xref:HashWriter/GetSHA256.adoc[`GetSHA256`] 
| Compute the SHA256 hash of all data written to this object.
| xref:HashVerifier/ignore.adoc[`ignore`] 
| Reads and hashes the given number of bytes without storing them.
| xref:HashVerifier/operator_rshift.adoc[`operator>>`] 
| Deserializes an object from the source, hashing the bytes read.
| xref:HashVerifier/read.adoc[`read`] 
| Reads bytes from the source and feeds them into the hash.
| xref:HashWriter/write.adoc[`write`] 
| Adds data to the running hash.
| xref:HashWriter/operator_lshift.adoc[`operator<<`] 
| Serializes an object into the running hash.
|===



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