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 86319a8e16.

Cancel all asynchronous operations associated with the file.

void cancel();
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void cancel(
    boost::system::error_code & ec);
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