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Author SHA1 Message Date
Alex Bethel 528de718dc Clean up eval_expr some more 
I keep going back and forth on how I want this block to look :P
Anyway, this is *probably* its final-ish form, until the parser gets
re-written.
 2021-06-02 18:41:20 -05:00
Alex Bethel ce02aebd91 Use impl Value rather than trait BfWriter 
It probably makes more sense to be writing values with
`Value::bf_write` than to go for the complexity of using a trait to
allow `Writer::write_value` (which also looks ambiguous because it's
not immediately clear that a generic name like "write_value" relates
to BF or AbleScript).
 2021-06-02 18:20:30 -05:00
Alex Bethel 326d0511e7 Add Brainfuck functio interpretation 
BF functios can now be declared and called from AbleScript code.
Function parameters supplied from AbleScript are serialized manually
into byte sequences using the `BfWriter` trait, and are available from
BF code using the input operator, `,`.

At the moment, BF functios simply write output to stdout, and are
therefore incapable of communicating results to the rest of the
program; this might change in the future if we can get something close
to pass-by-reference working.
 2021-06-02 15:29:31 -05:00
Alex Bethel 07195d4cf6 Fix panic on arithmetic error 
Divide by zero and add, subtract, or multiply with overflow are all
caught now and reported as an ArithmeticError, rather than causing the
interpreter to panic.
 2021-05-30 13:32:29 -05:00
Alex Bethel acfd81ead2 More thorough unit tests 2021-05-30 13:32:29 -05:00
Alex Bethel 344a11084e Add some unit tests to interpret.rs 
Currently `overflow_should_not_panic` and `variable_persistence` both
fail due to bugs in the interpreter.
 2021-05-30 13:32:29 -05:00
Alex Bethel 099b9e23d6 Make base-55 encoding & decoding match 
Changed "U"'s encoding to -210, so now when the README claims "U =
-210", it's actually accurate :)
 2021-05-29 14:24:46 -05:00
Alex Bethel 585bf2e19f Use single-letter identifiers as base-55 digits 2021-05-29 10:45:39 -05:00
Alex Bethel c906366e3f Improve name & documentation accuracy 
Renamed ControlFlow -> HaltStatus because that's what the enum really
is -- a status on why something halted. Also reviewed `interpret.rs`'s
documentation and fixed a few things that were out of date.
 2021-05-25 21:55:02 -05:00
Alexander Bethel ec81ead3ea Implement break and hopback statements 2021-05-25 21:22:38 -05:00
Alexander Bethel 669f379700 Better abstractions, implement scoping rules 2021-05-25 13:26:01 -05:00
Alexander Bethel 109c77eeb2 Implement more statements 
Added variable declaration, `if` statements, `loop` statements,
variable assignment, and variable banning to go along with
printing (which was already implemented). We still need function
declarations, brainfuck declarations, function calls, and the control
flow operators "break" and "hopback".
 2021-05-24 10:50:26 -05:00
Able c27837a807 Slightly more curse 2021-05-24 01:18:36 -05:00
Alexander Bethel b625a71711 Allow abool -> bool coercion 
The expression `sometimes & true` now evaluates to `true` 50% of the
time and false 50% of the time, rather than throwing a type error
because `sometimes` is not a bool.
 2021-05-21 12:25:37 -05:00
Alexander Bethel ea211fc3b0 Make ablescript -f run interpreter 
`ablescript -f foo.able` will now both parse and interpret `foo.able`,
rather than just parsing it.
 2021-05-20 18:24:18 -05:00
Alexander Bethel eccc00ff81 Implement basic interpreter 
Added code for interpreting parsed AbleScript expressions and
statements, and hooked it up to the REPL.
 2021-05-20 18:18:01 -05:00
tdark 1b195dc955 Added support for specifying a tape size limit 2021-05-15 18:39:49 +02:00
tdark 7b5ae34bfd Implemented brainfuck interpreter 2021-05-15 18:10:50 +02:00
able 87139c4448 consider using able brand products 2021-05-05 07:33:40 -05:00
able 9b7367353d Brain fuck work 2021-05-04 22:23:17 -05:00
able bdf27c83da Minor Changes 2021-05-03 19:33:21 -05:00
Erin 72cd540728 Tidy up 2021-05-03 23:02:19 +02:00
Erin 798c1807db Obeyed our paperclip overlord + fmt 2021-05-03 21:36:32 +02:00
Erin 30eedbc854 Fixed some incompatible old code 
- Added assignment support
- Reduced boilerplate
- Removed `else`
 2021-05-03 21:35:43 +02:00
Erin 29bf01935c Variable assignment implemented 2021-05-03 09:54:27 +02:00
Erin 8c6f415ac9 Fixed #13 2021-05-03 08:47:52 +02:00
Erin 051f6e781f Added tests and loop flow 2021-05-02 18:12:51 +02:00
Erin ecce080378 Added T-Dark block 
- obeyed clippy
 2021-05-02 17:38:12 +02:00
Erin 5a8dd5051f Parser production ready 
- TODO: T-Dark block
- cargo fmt
- Obeyed our clippy overlord
 2021-05-02 16:48:33 +02:00
Erin c90d242b0f Parser implements examples 
- Function call is now stmt (muhehe)
 2021-05-02 15:43:25 +02:00
Erin 18a1343e11 Added basic math operations 
- cargo fmt
 2021-05-02 00:39:08 +02:00
Erin 3794fd3c8f Divided token types 
- Item = Expr | Stmt
- Added REPL (AST dump)
- Removed operator parsing because it was horrible and I need to redo it
 2021-05-01 13:44:58 +02:00
Erin eef7ec16fa Tidy up 2021-04-29 19:19:35 +02:00
Erin ca60f818eb Implemented function calls 2021-04-29 18:50:51 +02:00
Erin 17a32a8df7 Bugfix: Peeking 
- Fixed `PeekableLexer` next to not-be passtrough to iterator
- Made error handling depend on state of Option
 2021-04-29 09:47:29 +02:00
Erin e45afeac5e Added Peekable Lexer 
- Added wrapper for Lexer with `peek()` method
- Renamed `token` module to `lexer` as it more describe it's function
- Started work on operator flow
 2021-04-28 22:52:19 +02:00
Erin f3779deeb5 Added parsing of conditionals 2021-04-27 13:48:56 +02:00
Erin 3f9e6b72cc Made parser to throw error when unexpected EOF 2021-04-27 11:57:11 +02:00
Erin 39a8bf6a54 Redone original parser 
= implemented original features
 2021-04-27 11:49:07 +02:00
Erin d2160a3a4a Added testing for base55, new identifier lexing 2021-04-27 11:09:19 +02:00
Erin 3b8ce34c2b Continue work on parser, improved lexer 
- Added literal parsing (improved lexing)
- Revised error handling
 2021-04-27 10:51:39 +02:00
Erin cc4ec803c4 Starting work on parser improvements 
- Parser should parse single expressions
 2021-04-26 10:44:42 +02:00
Erin e020fc4267 Implemented abool 
- Tidied up code
 2021-04-18 23:40:41 +02:00
Erin 7e0c881130 Added function/variable parsing 
- Added block support
- TODO: Tidy it up
 2021-04-18 22:33:55 +02:00
Erin 48dd930872 Initial parser work 2021-04-18 16:39:43 +02:00
able bc1eb42af4 variable things added 2021-04-13 18:01:19 -05:00
Erin 1db4bd74cf clippy + fmt 2021-04-13 17:43:54 +02:00
Erin 81ff84ad73 Improved Scanner 2021-04-13 17:40:20 +02:00
Erin 968a65b1fb Added tokenization 
- Added tokenization
- Modified `Token` definition for make it compatible with Logos
- And also obeyed our paperclip overlord and changed all names to be complaint with Rust conventions
 2021-04-12 20:20:45 +02:00
able 1abd802b58 Merge branch 'master' of https://github.com/AbleTheAbove/able-lang 
merge
 2021-04-11 22:40:32 -05:00