Initial import of Lutok, version 0.2.

This is a required component of Kyua and its build will be guarded by
the MKKYUA knob. core@ has approved this import.

Description:

Lutok is a lightweight C+

Initial import of Lutok, version 0.2.

This is a required component of Kyua and its build will be guarded by
the MKKYUA knob. core@ has approved this import.

Description:

Lutok is a lightweight C++ API library for Lua.

Lutok provides thin C++ wrappers around the Lua C API to ease the
interaction between C++ and Lua. These wrappers make intensive use of
RAII to prevent resource leakage, expose C++-friendly data types, report
errors by means of exceptions and ensure that the Lua stack is always
left untouched in the face of errors. The library also provides a small
subset of miscellaneous utility functions built on top of the wrappers.

Lutok focuses on providing a clean and safe C++ interface; the drawback
is that it is not suitable for performance-critical environments. In
order to implement error-safe C++ wrappers on top of a Lua C binary
library, Lutok adds several layers or abstraction and error checking
that go against the original spirit of the Lua C API and thus degrade
performance.

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