Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Append a character.

void
push_back(
    char ch);

Appends a character to the end of the string.

Strong guarantee.

Name	Description
`ch`	The character to append.

Type	Thrown On
boost::system::system_error	`size() + 1 > max_size()`.