[#subprocess-Buffer]
= xref:subprocess.adoc[subprocess]::Buffer
:relfileprefix: ../
:mrdocs:

class: Buffer This class is a very thin wrapper around std::vector<char> This is basically used to determine the length of the actual data stored inside the dynamically resized vector.

== Synopsis

Declared in `<util/subprocess.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class Buffer;
----

== Description

This is what is returned as the output to the communicate function, so, users must know about this class.

OutBuffer and ErrBuffer are just different typedefs to this class.

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:subprocess/Buffer/2constructor-0f.adoc[`Buffer`]         [.small]#[constructor]#
| Constructors
| xref:subprocess/Buffer/add_cap.adoc[`add_cap`] 
| Resizes the underlying storage to the given capacity.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:subprocess/Buffer/buf.adoc[`buf`] 
| Dynamically sized storage for the captured bytes.
| xref:subprocess/Buffer/length.adoc[`length`] 
| Number of valid bytes currently stored in buf.
|===



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