---
title: "+=(_:_:)"
framework: coremedia
role: symbol
role_heading: Operator
path: "coremedia/cmreadonlydatablockbuffer/+=(_:_:)-67kx8"
---

# +=(_:_:)

Appends the bytes of another block buffer without copying.

## Declaration

```swift
static func += (lhs: inout CMReadOnlyDataBlockBuffer, rhs: CMReadOnlyDataBlockBuffer)
```