Certain Lua limits are reduced due to changed byte code structure.Upvalues cannot subvert the static typing of local variables (issue #26) when types are annotated.Values crossing from Lua to Ravi will be subjected to typechecks should these values be assigned to typed variables.However all types in Ravi can be passed to Lua functions operations on Ravi arrays within Lua code will be subject to restrictions as described in the section above on arrays. Programs using these features cannot be run by standard Lua. Ravi supports optional typing and enhanced types such as arrays (see the documentation).Ravi should be able to run all Lua 5.3 programs in interpreted mode, but following should be noted: For more detailed comparison please refer to the documentation links below. Ravi prioritizes ease of maintenance and support, language safety, and compatibility with Lua 5.3, Of course there is the fantastic LuaJIT implementation. I want to keep the language safe and therefore usable by non-expert programmers. Type information can be exploited by JIT compilation technology to improve performance. My motivation is somewhat different - I want to enhance the VM to support more efficient operations when types are The static typing is to aid programming in the large - the code is eventually translated to standard Lua The Typed Lua effort is very similar to the approach taken by Typescript in the JavaScript world. These efforts are mostly about adding static type checks in the language while leaving the VM unmodified. There are other attempts to add static typing to Lua - e.g. Optional and therefore Lua programs are also valid Ravi programs. Static typing for improved performance when JIT compilation is enabled. Lua is perfect as a small embeddable dynamic language so why a derivative? Ravi extends Lua with Static types Sol means the Sun in Portugese. Interestingly a precursor to Lua was Sol which had support for The name Ravi comes from the Sanskrit word for the Sun. Ravi is a dialect of Lua with limited optional static typing andįeatures a JIT compiler powered by MIR as well as experimental support for AOT compilation to native code.
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