string::subview (1 of 2 overloads)

Return a view.

string_view
subview(
    std::size_t pos,
    std::size_t count = npos) const;

Returns a view of a substring.

Strong guarantee.

this->subview().substr(pos, count)

Name	Description
`pos`	The index to being the substring at. The default argument for this parameter is `0`.
`count`	The length of the substring. The default argument for this parameter is `npos`.

Type	Thrown On
boost::system::system_error	`pos > size()`.