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 a snapshot of the develop branch, built from commit e60898da42.

Deferred Callable Object

Description

Callable Object types that work with ResultOf utility to determine the result of a call.

Refinement of

Callable Object

note Once C++ supports the decltype keyword, all models of Callable Object will also be models of Deferred Callable Object, because function objects won't need client-side support for result_of.

Notation

F: A possibly const qualified Deferred Callable Object type
A1 ...AN: Argument types
a1 ...aN: Objects or references to objects with types A1 ...AN
T1 ...TN: Ti is Ai & if ai is an LValue, same as Ai, otherwise

Expression requirements

Expression	Type
`boost::result_of< F(T1 ...TN) >::type`	Result of a call with `A1 ...AN`-typed arguments

Models

Polymorphic Function Object types
member (function or data) pointer types

Examples

& a_free_function
& a_class::a_static_member_function
& a_class::a_nonstatic_data_member
& a_class::a_nonstatic_member_function
std::less<int>()
// using namespace boost;
bind(std::less<int>(), _1, 5)
// Note: Boost.Lambda expressions don't work with __boost_result_of__
fusion::make_fused_function_object(std::less<int>())