Restructure and redesign the Lua compiler.

rbartlensky commented 5 years ago

Please review this PR first.

The Lua compiler has been redesigned and moved into its own crate. The new design includes:

Instructions that are encoded as 32 bit values where the first byte represents the opcode, and the next 3 bytes the first, second and third operands of the instruction.
Constant tables for integers, floats and strings. When a literal is compiled, it is placed into a constant table, which is also encoded into the bytecode. There are 3 constant tables, one for each type, but this is still experimental and might change in the future.
The bytecode can be serialized to a file, and and can be reconstructed from one. This is useful for the interpreter.

This commit also moves the interpreter into its own crate, but it is unusable at the moment.

ltratt commented 5 years ago

We seem to have quite a few test failures?

rbartlensky commented 5 years ago

Sorry about that, it should be fine now. I retriggered the travis task.

rbartlensky commented 5 years ago

Ready for re-review.

ltratt commented 5 years ago

For the next PR, let's use rustfmt (we tend to prefer the style in https://github.com/softdevteam/packedvec/blob/master/.rustfmt.toml, but it's not an absolute requirement).

rbartlensky commented 5 years ago

Sure, I'll make sure to include rustfmt with my next pr! This is ready for another review.

ltratt commented 5 years ago

Please squash.

[I'd suggest doing a PR that's just rustfmt: it'll touch a lot of code, so we can get it over and done with in a mechanical way before moving to something more useful.]

rbartlensky commented 5 years ago

Squashed!

rbartlensky / Lua-interpreter

Restructure and redesign the Lua compiler. #4