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 master branch, built from commit 7789ef3d8d.
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Asserts

The MPL supplies a suite of static assertion macros that are specifically designed to generate maximally useful and informative error messages within the diagnostic capabilities of each compiler.

All assert macros can be used at class, function, or namespace scope.