asio C++ library

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system_context::has_service

Inherited from execution_context.

Determine if an execution_context contains a specified service type.

template<
    typename Service>
friend bool has_service(
    execution_context & e);

This function is used to determine whether the execution_context contains a service object corresponding to the given service type.

Parameters

e

The execution_context object that owns the service.

Return Value

A boolean indicating whether the execution_context contains the service.

Requirements

Header: asio/system_context.hpp

Convenience header: asio.hpp


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