string::operator+=

`string::operator+=`

Append characters from a string.

string&
operator+=(
    string_view sv); (1)

string&
operator+=(
    char ch); (2)

Appends {sv.begin(), sv.end()) to the end of the string.

Strong guarantee.

*this

Name Description

Name	Description
`sv`	The `string_view` to append.
`ch`	The character to append.

sv

The string_view to append.

ch

The character to append.

Type Thrown On

Type	Thrown On
`boost::system::system_error`	`size() + sv.size() > max_size()`.

boost::system::system_error

size() + sv.size() > max_size().