greg
0999cbe28e
More parsing work
2017-09-19 22:10:55 -07:00
greg
674f70a428
Convert parsing to method-based
2017-09-19 22:10:54 -07:00
greg
b1b6672399
Implement function parsing
...
With a lot of dummy code, especially around expression parsing
2017-09-19 22:10:54 -07:00
greg
bd1c455dc8
Basic infrastructure parses
...
Also got rid of EOF, don't need it
2017-09-19 22:10:54 -07:00
greg
b62ef43f07
Add basic BNF grammar
2017-09-19 22:10:54 -07:00
greg
09b67dc3f7
Change error message
2017-09-19 22:10:54 -07:00
greg
a613fa73e5
Basic parsing framework
2017-09-19 22:10:54 -07:00
greg
8c473c554e
Fix bug
2017-09-19 22:10:54 -07:00
greg
3e04cbfa29
Add comma tokenization
2017-09-19 22:10:54 -07:00
greg
570650cbfa
Finish keyword tokenization
2017-09-19 22:10:54 -07:00
greg
49be163181
Add test to ignore
...
For better handing of user-defined operators, which I will do in the
future
2017-09-19 22:10:54 -07:00
greg
b4f93acbd8
Couple more tests
2017-09-19 22:10:54 -07:00
greg
8c65ae3214
Macro-ize token tests
2017-09-19 22:10:54 -07:00
greg
e436533638
Passing test
2017-09-19 22:10:54 -07:00
greg
4601a56867
Start working on tokenization tests
2017-09-19 22:10:54 -07:00
greg
2f7a1850db
Finish tokenizing
2017-09-19 22:10:54 -07:00
greg
71aef379d3
Tokenize number literals
...
TODO: expand this bit of code to handle 0x12, etc. syntax
2017-09-19 22:10:54 -07:00
greg
8662a3ba0e
Make tokenize error-able
2017-09-19 22:10:54 -07:00
greg
5ca98c7d77
Print tokeniziation
2017-09-19 22:10:54 -07:00
greg
13cde3106c
Start making tokenizer changes
...
Hopefully this time iron out all the bugs from the last implementation
2017-09-19 22:10:54 -07:00
greg
09d524c74a
Changing how parsing works again
...
Someone wrote a port of the LLVM kaleidoscope tutorial to rust, namely
https://github.com/jauhien/iron-kaleidoscope
I'm just gonna follow this along
2017-09-19 22:10:54 -07:00
greg
61c36c4def
Fix assign parsing
...
= is a keyword not an identifier
2017-09-19 22:10:54 -07:00
greg
bc4fbe4276
Start implementing definition
...
WIP, doesn't work
2017-09-19 22:10:54 -07:00
greg
fc11ee753d
Add block parsing
...
Right now evaluating a block reduces it to just the last AST in it, will
fix later with environments
2017-09-19 22:10:54 -07:00
greg
dd2b4893a4
Get rid of Separator token
...
Have separate newline and semicolon tokens
2017-09-19 22:10:54 -07:00
greg
51745fd800
Make convenience macro for parse errors
2017-09-19 22:10:54 -07:00
greg
8c0ac19fa8
Add full test
...
Test evaluate, tokenize, parser all at once
2017-09-19 22:10:54 -07:00
greg
971ab9ba21
Implement paren expressions
2017-09-19 22:10:54 -07:00
greg
819fb3f58f
Basic evaluator functionality
...
Interpreter now works for simple arithmetic expressions
2017-09-19 22:10:54 -07:00
greg
1c23329656
Add boilerplate for evaluation
...
Just wires everything up, doesn't actually evaluate yet
2017-09-19 22:10:54 -07:00
greg
6da20cbfaf
Address compiler warnings
2017-09-19 22:10:54 -07:00
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
be98f8387e
Add another test
2017-09-19 22:10:54 -07:00
greg
841b38d5b1
Add tokenization test
2017-09-19 22:10:53 -07:00
greg
16dfbb27d5
Use state features from simplerepl
2017-09-19 22:10:53 -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
123f388711
Rename language to "Schala"
2017-09-19 22:10:53 -07:00
greg
bb349cda5f
Fix newline tokenizing bug
...
Still need to fix <statements> parsing because of the final newline
2017-09-19 22:10:53 -07:00
greg
caa331ecdc
Read from file as well as repl
2017-09-19 22:10:53 -07:00
greg
ae3a030ad8
Use iterative semantics for reduction
...
Becuase if you try to make reduce() recursive you blow out the stack.
Incidentally, "let a = 0; while a < 999999; let a = a + 1 end" is a neat
thing to try at this stage of the game
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
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
