greg
|
f88f115567
|
Environment persistent across repl loop
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
08f1092b69
|
Variable lookup works
Note this introduces a panic - if the AST node inserted into the
environment is not reduced, it throws an error when trying to look it up
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
6ddea790c0
|
Beginning of variable lookup
everything is null
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
6897eb1283
|
Implemented variable binding
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
34fdf2be00
|
Add machinery for evaluation environments
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
4ef93fafb5
|
Cause tokenize error for unclosed strings
|
2017-09-19 22:10:53 -07:00 |
|
greg
|
d2108f0f97
|
First pass at evaluation
Very incomplete
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
2989ac338c
|
Implemented binop parsing
Uses Operator-precedence parsing algorithm, which I don't fully
understand.
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
8b6d54aec2
|
Fix let clause parsing
let a = x, x should be expression not just simple expression
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
cdb47bb3b9
|
Add paren parsing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
9d6dc5a5f2
|
Tokenize periods separately
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
71d2428e57
|
Update Grammar
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
8f9bfbc5bd
|
Rename rhs to simple_expression
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
c9fdd5e83c
|
Simplified statements-parsing
Still a little wonky wrt extraneous Separators, need to adjust grammar
to fix I think
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
30eddf7737
|
while statements
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
42719dc2f2
|
Change 'input' to 'tokens'
just to be consistent
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
8fcc850d77
|
Added else clause to if parsing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
f421918945
|
basic if expression
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
0e4469fa58
|
Filled out keyword tokenizing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
edf100b583
|
Starting to do if statement parsing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
169e662049
|
Collapse Separator tokens
only ever gonna be one in a row
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
46999beabf
|
Added skeleton of expression() parser
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
1342a76786
|
Added support for interpreter directives
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
05238bced3
|
rhs production
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
a97cce184c
|
Empty program is valid too
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
1ae61287c1
|
Editing Grammar
to indicate what portion of it is now parsed
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
329c521964
|
Parsing statement blocks works
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
bfa16fd6fb
|
Added Keyword lexical class
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
25f5188d8c
|
Move definition around
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
5213dd327f
|
Change type to peekable
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
cea29094cd
|
type alias for Tokens
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
67eafba97a
|
Put expect into early return macro
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
1059a88ee6
|
Separate parsing into module
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
429ace73bd
|
Move tokenizing into separate module
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
044e7a6a26
|
Rename ASTNode -> AST
saves typing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
dbdae42c1b
|
Add string to AST
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
fc3dcf792d
|
Start writing recursive descent parser
I think I get the idea now
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
02b34ca105
|
Wrote expect()
Hopefully correctly?
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
1e9cd551a6
|
Add grammar of language to repo
Preliminary, work in progress
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
9f4330889a
|
Starting parsing work
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
3058af4f05
|
Break on ctrl-D
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
4f17d5a0dc
|
Add number tokenizing
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
8e3774ffca
|
Comma as separate token
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
c6059ada7d
|
Separators and parens
Separator = ; or \n, they are equivalent
|
2017-09-19 22:10:52 -07:00 |
|
greg
|
b5ee45f639
|
null is also a keyword
|
2017-09-19 22:10:51 -07:00 |
|
greg
|
04f53b6beb
|
Added some grammar sketch ideas to the readme
|
2017-09-19 22:10:51 -07:00 |
|
greg
|
2aaa600d53
|
More tokenizer stuff
|
2017-09-19 22:10:51 -07:00 |
|
greg
|
c6a92728ee
|
Scaffolding for evaluation function
|
2017-09-19 22:10:51 -07:00 |
|
greg
|
b2e23bed86
|
Print tokens and parse
|
2017-09-19 22:10:51 -07:00 |
|
greg
|
3fdacf018e
|
Basic repl
|
2017-09-19 22:10:51 -07:00 |
|