maurice/snix
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16 commits

Author SHA1 Message Date
Vincent Ambo
26ed836e1d feat(tazjin/rlox): Add support for scoped environments 
Adds scoped environments using a sophisticated structure known as an
SRPT, which stands for "shitty parent pointer tree".

Change-Id: I62f66aabe6eb32ea01c4cabcca5b03cfefcc28ee
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2301
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-31 15:33:08 +00:00
Vincent Ambo
48a54625ce refactor(tazjin/rlox): Separate assignment and definition 
So that:

> var a = 15;
> b = 12;
Error in program: Error { line: 0, kind: UndefinedVariable("b") }
> a = 12; print a;
Number(12.0)

Change-Id: I687e95ccc2d3084e39a71bd452656ae981c95191
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2300
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-31 14:32:03 +00:00
Vincent Ambo
cc958e6730 feat(tazjin/rlox): Implement mutable variable assignment 
Change-Id: I56db10a5ac26958ae27a8d4c8fa7b8f8285bc7e1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2299
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-31 14:32:03 +00:00
Vincent Ambo
8ab66f1689 refactor(tazjin/rlox): Retain interpreter state in REPL 
Change-Id: Id60760e241ad0e45871b48e499f58e9831d57316
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2298
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
 2020-12-31 11:19:42 +00:00
Vincent Ambo
78355d3c0b feat(tazjin/rlox): Add global variable support in interpreter 
Change-Id: I4134cf78dc3934a517ad0c848ae1d3729abaf882
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2297
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
 2020-12-31 11:19:42 +00:00
Vincent Ambo
0f9a7b3f86 feat(tazjin/rlox): Parse variable assignment & access 
Change-Id: I9894d76716d739e85a4757d9e658f884228e7f52
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2290
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-22 20:18:01 +00:00
Vincent Ambo
a104afa6ea refactor(tazjin/rlox): Introduce declarations in parser 
Change-Id: I873fdd53319ec36da18926d9477e809a69dbace7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2288
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-22 10:13:28 +00:00
Vincent Ambo
75ae25daa9 feat(tazjin/rlox): Add support for statements 
First part of
https://craftinginterpreters.com/statements-and-state.html

Supports print statements, as well as evaluation for the sake of
it (i.e. future side-effects).

Change-Id: Ic6653b568f98d6cfe3f297615b7113c0ba1d9a70
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2287
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-22 10:13:28 +00:00
Vincent Ambo
5ebe28cca2 feat(tazjin/rlox): Add runtime type error handling 
Change-Id: I0d52bc9ff5be6421cb4131265ed28ce1ea7d8ff3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2282
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-20 16:25:54 +00:00
Vincent Ambo
bc6775c318 feat(tazjin/rlox): Implement tree-walk interpreter of exprs 
This is only a subset of the Lox spec so far. It implements the
language up to the runtime error chapter on
https://craftinginterpreters.com/evaluating-expressions.html

Change-Id: I295dbf4b6544420d6fe80b6aaba661fb21acdea6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2281
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-20 16:25:54 +00:00
Vincent Ambo
42405bfa24 feat(tazjin/rlox): Synchronise parser state after errors 
This lets the parser collect multiple errors instead of returning
after the first one, with some optimistic synchronisation after
encountering something that looks wonky.

Change-Id: Ie9d0ce8de9dcc7a3d1e7aa2abe15f74cab0ab96b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2236
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-06 17:34:57 +00:00
Vincent Ambo
1835b2be99 feat(tazjin/rlox): Wire up parser to the REPL 
Change-Id: I940448c63ce105d53a0f281b6320ffb01378f207
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2235
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-12-06 14:58:39 +00:00
Vincent Ambo
36cf7bef24 refactor(tazjin/rlox): Thread through scanner errors 
... and show them to users, very crudely.

Change-Id: If4491b14db1124313f6ab7e5fbfdce9fea501d11
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2193
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-11-28 17:26:58 +00:00
Vincent Ambo
800d2ccde8 fix(tazjin/rlox): Clear previous line in REPL mode 
Change-Id: I8acc5b0d07b2c656f9bba76a6ddac6b9088ea563
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2189
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-11-28 16:33:32 +00:00
Vincent Ambo
46c6906aaa chore(tazjin/rlox): Wire scanner to interpreter to reduce warnings 
... they're just noisy at the moment. This isn't complete because it
doesn't thread through scanner errors.

Change-Id: I0f75d2b20fa3f57be1af5d1d8aa8059856855825
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2162
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-11-27 17:29:04 +00:00
Vincent Ambo
9d2b001c4c feat(tazjin/rlox): Add basic program structure 
... as well as a Nix derivation, because why not.

Change-Id: Iaf2591ab72676fe0732c3f807b3aa0cff13fb4ef
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2143
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
 2020-11-23 01:15:57 +00:00