# aa

Scheme dialect for 9front, the only Plan 9 operating system that is
actually worth doing anything with.

This was originally a port of
[fe](https://github.com/rxi/fe), but is now moving in its own
direction (R7RS).

## What's up with the name?

- My name is _Parentheses_, for we are many. *AAAaaaaaAAaaaaa*.

## Notes

* all numbers are of `double` type
* C null-terminated string, so no binaries supported
* characters escaping isn't there
* no idea wth `let` is doing currently

## Implemented and somewhat tested

```
#f
#false
#t
#true
```

```
and
begin
car
cdr
cons
define
display
eval
if
lambda
list
max
min
newline
not
or
quote
set!
square
while
```

```
atom?
boolean?
defined?
eq?
equal?
finite?
infinite?
nan?
null?
number?
string?
```

`= < > <= >= + - * /`

## Things that need work/testing or not implemented at all

```
let
mac
setcar
setcdr
```

### Math (optional, see `aa_math.*`)

```
abs
acos
asin
atan
ceiling
cos
cosh
exp
expt
floor
log
log10
sin
sinh
sqrt
tan
tanh
truncate
```

## TODO

* read through R7RS and try not to have too big of a "religious experience"
* ports
* better exception and error handling in general
* tail call optimization
* bytecode vm?
* stop making stupid dad jokes