Commit Graph

1075 Commits

Author SHA1 Message Date
greg
eb5ce2ef9e Don't print newline for empty REPL result 2017-09-19 22:10:53 -07:00
greg
b080ea7c81 Add if-statement evaluation 2017-09-19 22:10:53 -07:00
greg
dffab8ae94 Fixed arg list parsing 2017-09-19 22:10:53 -07:00
greg
48ee6c9a75 Add function name to parse 2017-09-19 22:10:53 -07:00
greg
58d399dace More function parsing 2017-09-19 22:10:53 -07:00
greg
57ea1bae30 Preliminary addition of function blocks 2017-09-19 22:10:53 -07:00
greg
e870d8172a Make = a keyword 2017-09-19 22:10:53 -07:00
greg
72b26755a7 Make ParseResult just a normal Result type
No reason for it to be different
2017-09-19 22:10:53 -07:00
greg
1416c9d444 Parse null as simple_expression 2017-09-19 22:10:53 -07:00
greg
5c79563e53 Reduce binop args before reducing full expr 2017-09-19 22:10:53 -07:00
greg
c27c900e7f Add operators % and **
semantics for these are hard with floats handle later
2017-09-19 22:10:53 -07:00
greg
50c5dbe96d Evaluate simple binops
Woo this is kind of a neat milestone! I can now compute with this
language!
2017-09-19 22:10:53 -07:00
greg
be8c8b3343 Add paren test 2017-09-19 22:10:53 -07:00
greg
b856023072 Fixed paren parsing
also made error reporting a bit nicer
2017-09-19 22:10:53 -07:00
greg
868373f409 use match syntax in simple_parse 2017-09-19 22:10:53 -07:00
greg
582a7fd6dc Make parse and tokens optional 2017-09-19 22:10:53 -07:00
greg
a947ec3cb2 Add simple parsing test 2017-09-19 22:10:53 -07:00
greg
79619025ea Add directive to print precedence chart 2017-09-19 22:10:53 -07:00
greg
56b338a6a8 Move to global precedence table 2017-09-19 22:10:53 -07:00
greg
7d6f946e22 Fill out a few more precedences 2017-09-19 22:10:53 -07:00
greg
0da7f7e3a1 Fully fixed binop parsing 2017-09-19 22:10:53 -07:00
greg
19a344fa77 Fixed precedent-less binop parsing 2017-09-19 22:10:53 -07:00
greg
626a7f3861 Working on binop parsing 2017-09-19 22:10:53 -07:00
greg
8e3a571d67 .env dirctive to display environment 2017-09-19 22:10:53 -07:00
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