Commit Graph

48 Commits

Author SHA1 Message Date
greg
f48451125e Parsing arithmetic expressions works
At the expense of an unnecessary move in lookahead()
2017-09-19 22:10:54 -07:00
greg
06c3999430 Add expect_identifier function
For utility
2017-09-19 22:10:54 -07:00
greg
1af1589550 Make Parser class internally use IntoIterator
And wrap the next() and peek() methods
2017-09-19 22:10:54 -07:00
greg
32a90b8103 write expect
and also make the ParseResult type more general so it can be used for
more things.
2017-09-19 22:10:54 -07:00
greg
186c900920 Implement expect macro
Seems like there's no way around passing in self manually
2017-09-19 22:10:54 -07:00
greg
509ab80b9c I can now parse one thing 2017-09-19 22:10:54 -07:00
greg
247638c4db Get parsing REPL working 2017-09-19 22:10:54 -07:00
greg
3af7e6a409 Refactoring Schala
Gonna work on Schala in earnest now! Using the simplerepl crate instead
of a build-in REPL, temporarily dropping parsing and evaluation code.
2017-09-19 22:10:53 -07:00
greg
ddb09b453d Implement booleans 2017-09-19 22:10:53 -07:00
greg
9a4760d44f Implement while-reduction 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
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
a947ec3cb2 Add simple parsing test 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
6ddea790c0 Beginning of variable lookup
everything is null
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
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
edf100b583 Starting to do if statement parsing 2017-09-19 22:10:52 -07:00
greg
46999beabf Added skeleton of expression() parser 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
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