Boost C++ Libraries 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 a snapshot of the master branch, built from commit 5002c2d6a2.

Struct key_not_found

boost::proto::key_not_found — The type of objects returned when a key-based lookup fails in a transform environment.


// In header: <boost/proto/transform/env.hpp>

struct key_not_found {