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

This is the documentation for an old version of Boost. Click here to view this page for the latest version.

field::as_string (1 of 2 overloads)

Retrieves a reference to the underlying std::string value or throws an exception.

Synopsis

const std::string&
as_string() const;

Exception safety

Strong guarantee. Throws on type mismatch.

Exceptions

Type	Thrown On
`bad_field_access`	If `!this->is_string()`

Object lifetimes

The returned reference is valid as long as *this is alive and no function that invalidates references is called on *this.