result_of Class
The latest version of this topic can be found at result_of Class.
Determines the return type of the callable type that takes the specified argument types.
Syntax
template <class Fn, class... ArgTypes>
struct result_of<Fn(ArgTypes...)>;
Parameters
Fn
The callable type to query.
ArgTypes
The types of the argument list to the callable type to query.
Remarks
Use this template to determine at compile time the result type of Fn(ArgTypes), where Fn is a callable type invoked with an argument list of the types in ArgTypes. The type member of the template class names the result type of decltype(INVOKE(declval<Fn>(), declval<ArgTypes>()...)) if the unevaluated expression INVOKE(declval<Fn>(), declval<ArgTypes>()...) is well-formed. Otherwise, the template class has no member type. The type Fn and all types in the parameter pack ArgTypes must be complete types, void, or arrays of unknown bound.
Requirements
Header: <type_traits>
Namespace: std