rubyx/lib/vool
Torsten Ruger 33ffcf1d88 move resolve_method code from word to mom
rather make resolve an instruction.
Since it was coded in risc anyway, we not only save the setup and call
But also makes the mom instruction flow clearer
The method really came from not wanting to code it in risc, but with
the Builder, that is now surprisingly painless
2018-04-08 18:55:17 +03:00
..
statements move resolve_method code from word to mom 2018-04-08 18:55:17 +03:00
README.md polish docs 2018-03-11 16:11:15 +05:30
ruby_compiler.rb introducing expressions and constants 2018-03-15 11:24:14 +05:30
statement.rb method tests working again 2018-03-16 10:32:11 +05:30
vool_compiler.rb get an elf written 2018-03-29 20:37:25 +03:00

VOOL

Virtual Object Oriented Language

in other words, ruby without the fluff.

Possibly later other languages can compile to this level and use rx-file as code definition.

Syntax tree

Vool is the layer of concrete syntax tree. The Parser gem is used to parse ruby. It creates an abstract syntax tree which is then transformed.

The next layer down is the Mom, Minimal object Machine, which uses an instruction tree. That is on the way down we create instructions, but stays in tree format. Only the next step down to the Risc layer moves to an instruction stream.

The nodes of the syntax tree are all the things one would expect from a language, if statements and the like. There is no context yet, and actual objects, representing classes and methods, will be created on the way down.

Fluff

Ruby has lots of duplication to help programmers to write less. An obvious example is the existence of until, which really means if not. Other examples, some more impactful are:

  • No implicit blocks, those get passed as normal arguments (the last)
  • No splats
  • no case
  • no elseif (no unless, no ternary operator)
  • no global variables.