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Lua Workshop 2016: IREP and Lua - Lee Busby (LLNL)

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Published on Dec 3, 2016

The Intermediate Representation (IREP) reads program input from Lua tables, and transfers the data into compiled structures whose layout is similar to the tables. The compiled structures are shareable between C/C++ and Fortran. IREP can handle most varieties of "Plain Old Data" and has mechanisms to extend it beyond POD. Structure templates are written using simple cpp(1) macros. No preprocessing nor metaprogramming is necessary. The Lua table reader is generic. No additional code beyond the structure template is normally required for IREP to read the matching Lua table. IREP uses only standard language features. Interestingly, this requires a couple of capabilities new in Fortran. Our next generation physics simulation code is embedding Lua as its configuration and steering language, and now includes IREP.

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