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215 Commits

Author SHA1 Message Date
greg
f8a521fc9b Start making function calls work 
This commit isn't fully done yet
 2017-09-19 22:10:56 -07:00
greg
77f72806be Add support for multiple frames 2017-09-19 22:10:56 -07:00
greg
dcde5d6018 Start function call reduction 
Move the varmap and funcmap functions to the Evaluator, to mkae it
easier to facilitate separate frames
 2017-09-19 22:10:56 -07:00
greg
6bb227d052 Rename methods 
make reduce() the entry point to evaluation
 2017-09-19 22:10:56 -07:00
greg
29d4cb53a4 Add infrastructure to do function evaluation 
Right now you can successfully evaluate a function definition (returning
Null), but cannot call a function
 2017-09-19 22:10:56 -07:00
greg
3915c1f035 Remove println from reduction 2017-09-19 22:10:56 -07:00
greg
b400796e4d Get rid of test variable input 2017-09-19 22:10:56 -07:00
greg
96e6a87f64 Add string concat 2017-09-19 22:10:56 -07:00
greg
b1f9e5cefc Fix variable lookup 2017-09-19 22:10:56 -07:00
greg
be36d4697d Pretty-print evaluated AST nodes 2017-09-19 22:10:56 -07:00
greg
ce8c511929 Evaluate additional operators 2017-09-19 22:10:55 -07:00
greg
a8cafa8c64 Move Evaluator state into interpreter state 2017-09-19 22:10:55 -07:00
greg
229e6ae733 More expression parsing work 2017-09-19 22:10:55 -07:00
greg
e9dd0d9ae8 Add concept of Null expression 
Finally, the null-only behavior is starting to manifest itself!
 2017-09-19 22:10:55 -07:00
greg
15d4317191 Add null expression 2017-09-19 22:10:55 -07:00
greg
7114e446a4 Adding, subtracting works 2017-09-19 22:10:55 -07:00
greg
044f534ac5 Start implementing variable lookup 2017-09-19 22:10:55 -07:00
greg
d3207ad890 Move evaluation logic back into methods 
They need to be able to access the environment which is stored in the
Evalator struct
 2017-09-19 22:10:55 -07:00
greg
19fffd5063 Variable binding infrastructure 2017-09-19 22:10:55 -07:00
greg
785c916ece Start reducing ASTs 
Start writing code to reduce AST nodes
q
 2017-09-19 22:10:55 -07:00
greg
5a9ebb188d Make Evaluable trait 2017-09-19 22:10:55 -07:00
greg
16e8d969be Add basic evaluation 2017-09-19 22:10:55 -07:00
greg
70bf68d9bd More concision in parser 2017-09-19 22:10:55 -07:00
greg
f53c14535b Made error! macro more programtic 
TODO implement Display on Token so we're not just displaying the debug
name of the token enum variants
 2017-09-19 22:10:55 -07:00
greg
4f96abd7d9 Changes to make the code more concise 2017-09-19 22:10:55 -07:00
greg
fdaf4c302c Fix all compiler warnings 2017-09-19 22:10:55 -07:00
greg
8ce53d7c72 Fix bind error 2017-09-19 22:10:55 -07:00
greg
428d560e2a Add tests for call expr parsing 2017-09-19 22:10:55 -07:00
greg
80bc7ec089 Proper call expression parsing 2017-09-19 22:10:55 -07:00
greg
e6591b80d9 Add paren test 2017-09-19 22:10:55 -07:00
greg
e099f713ad Add binop parsing test 2017-09-19 22:10:55 -07:00
greg
9b54256521 Import types for breivty 
and rename function to be explicit
 2017-09-19 22:10:55 -07:00
greg
087402ece6 Add more tests 
Need to use box patterns
 2017-09-19 22:10:55 -07:00
greg
252b6e8bd9 Okay, this strategy makes the test work 2017-09-19 22:10:55 -07:00
greg
b1163e2ae4 Operator-precedence parsing + tests 
The tests are crippled now, because it's hard to write a test macro that
can also match on Strings
 2017-09-19 22:10:55 -07:00
greg
032d01c9f5 Fix tokenization bug 2017-09-19 22:10:55 -07:00
greg
c4ab1ed105 Fix tokenizer tests 2017-09-19 22:10:55 -07:00
greg
9a257f08d7 Introduce Op type 
For operator parsing
 2017-09-19 22:10:55 -07:00
greg
47d56a7b44 fix operator parsing 2017-09-19 22:10:55 -07:00
greg
1f7ae2e30f Paren expression 2017-09-19 22:10:55 -07:00
greg
e3c8753a4d Expression parsing 2017-09-19 22:10:55 -07:00
greg
e1aa7ecb17 Finish tokenizing Op separately 2017-09-19 22:10:55 -07:00
greg
f09a6e14ba Tokenizer work to support operators 
work in progress but committing to transfer
 2017-09-19 22:10:55 -07:00
greg
31da25a66e Expression parsing work 2017-09-19 22:10:55 -07:00
greg
fff9cb7d25 Fix functin parsing 2017-09-19 22:10:55 -07:00
greg
db1e188fdb Move grammar to top of file 2017-09-19 22:10:55 -07:00
greg
935185ed92 more parsing 2017-09-19 22:10:55 -07:00
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
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