string::assign (1 of 7 overloads)

Assign characters to a string.

string&
assign(
    std::size_t count,
    char ch);

Replace the contents with count copies of character ch.

Linear in count.

Strong guarantee. Calls to memory_resource::allocate may throw.

*this

Name	Description
`count`	The size of the resulting string.
`ch`	The value to initialize characters of the string with.

Type	Thrown On
boost::system::system_error	`count > max_size()`.