Re: [ANN] LuacExplain

[Dirk Laurie <dirk.laurie@...>]

2015-10-06 12:03 GMT+02:00 Mooffie <mooffie@gmail.com>:
> 'luacexplain' is a small program that enhances the output of "luac
> -l", and especially of "luac -l -l":
>
>     https://github.com/mooffie/luacexplain
>
> It's intended for whoever wants to understand Lua VM's instructions
> (or "opcodes") better.
>
> After every VM instruction it prints a pseudo-code line describing the
> instruction, and a more friendly representation of the operands.
>
> Let's have an example.
>
> First, a plain vanilla luac invocation:
>
>     $ echo "local b,c; local a = b+c" | luac -l -l -p -
>     ...
>     1   [1]   ADD   2 0 1
>     ...
>
> And now with piping it through 'luacexplain':
>
>     $ echo "local b,c; local a = b+c" | luac -l -l -p - | luacexplain
>     ...
>     1   [1]   ADD   2 0 1
>                            ;; R(A) := RK(B) + RK(C)
>                            ;; 2<?a> 0<b> 1<c>
>
> The "R(A) := RK(B) + RK(C)" line is the pseudo-code (the README.md
> gives links to texts explaining its conventions). The "2<?a> 0<b>
> 1<c>" is simply "2 0 1" (the A-B-C operands) with the variable names
> printed in angle brackets after every operand.

Would not

;; a := b + c

also be possible, and even more friendly?