greg
2996198eff
lookup_binding only needs &str
2017-09-19 22:10:58 -07:00
greg
06771979df
Function bodies can contain statements now
2017-09-19 22:10:58 -07:00
greg
f158b6c712
Converted to multiple-evaluator logic
...
Now I have (basically) full single-step evaluation and it works fine
2017-09-19 22:10:58 -07:00
greg
872e9ce7ee
Make function binding a SideEffect
2017-09-19 22:10:58 -07:00
greg
edf342e65a
Add == operator
2017-09-19 22:10:58 -07:00
greg
6794d22f1d
Run rustfmt on eval.rs, parser.rs
2017-09-19 22:10:58 -07:00
greg
1858d26638
Add comparison operators
...
+ make operator evaluation more concise
2017-09-19 22:10:58 -07:00
greg
84fbe73cf6
Add Lambda type
...
And change name FuncNode -> FuncDefNode
Now function definition nodes reduce to a Lambda, which is not
reducible.
2017-09-19 22:10:58 -07:00
greg
82c52ede48
Finish evaluating conditionals
2017-09-19 22:10:57 -07:00
greg
7f52b20d97
Conditional eval partway implemented
...
Need to change the AST representation to support compound statements I
think
2017-09-19 22:10:57 -07:00
greg
12fee6158c
Vector'd expressions don't need to be boxed
2017-09-19 22:10:57 -07:00
greg
9cc9c5977d
Fixed evaluation of function calls
...
This bit still isn't quite small-step but maybe that's okay for
functions
2017-09-19 22:10:57 -07:00
greg
ed9d1312d1
Change representation of variables
2017-09-19 22:10:57 -07:00
greg
29d9e50311
All environment changes represented explicitly
...
Start the work of rewriting the evluator to be a true small-step
evaluator - that is, all state changes are represented explicitly as
SideEffect types, and not as methods called on the evaluator, except at
the very top of the evaluation loop
2017-09-19 22:10:57 -07:00
greg
af45004afa
Run rustfmt on some files
2017-09-19 22:10:57 -07:00
greg
db52f9b716
Package compilation context into one struct
2017-09-19 22:10:57 -07:00
greg
a01b6c874e
Small-step function arg evaluation
2017-09-19 22:10:57 -07:00
greg
907af38f44
Evaluate printing
2017-09-19 22:10:57 -07:00
greg
8528c912bd
Added side effect framework
2017-09-19 22:10:57 -07:00
greg
0e3aaa8b08
Add conditional expression support
2017-09-19 22:10:56 -07:00
greg
f33cfdadfe
Fix variable lookup order
...
Evaluator uses frames as a stack, so to find the most-recent variable
binding we have to iterate through it the reverse way. This fixes a bug
manifested by:
fn a(x)
x + 20
end
fn b(x)
a(x) + 20
end
2017-09-19 22:10:56 -07:00
greg
f014c1a9d9
Kill compiler warnings
2017-09-19 22:10:56 -07:00
greg
c36bc3377e
Fix lookup_binding in function call case
2017-09-19 22:10:56 -07:00
greg
5eba222679
Variable binding in fucntion call work
2017-09-19 22:10:56 -07:00
greg
dcf89aa429
Move lookup_function back onto Evaluator
...
THe problem was that we were borrowing the output of the inner HashMap,
if we clone it we don't borrow anything
2017-09-19 22:10:56 -07:00
greg
1ffbeb6472
Return last value out of function
2017-09-19 22:10:56 -07:00
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
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
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
