1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
use std::{
error::Error,
io::{self, Read, Write},
process::exit,
};
use chomp::{
chomp::{
ast::substitute::Reduce,
typed::{
context::Context,
lower::{Backend, GenerateCode},
TypeInfer,
},
visit::Visitable,
},
lower::RustBackend,
nibble::{
convert::{self, Convert},
Statement,
},
};
use proc_macro2::Span;
fn main() {
let mut input = String::new();
let res = io::stdin()
.read_to_string(&mut input)
.map_err(|e| Box::new(e) as Box<dyn Error>)
.and_then(|_| syn::parse_str(&input).map_err(|e| Box::new(e) as Box<dyn Error>))
.and_then(|nibble: Statement| {
nibble
.convert(&mut convert::Context::default())
.map_err(|e| Box::new(e) as Box<dyn Error>)
})
.and_then(|expr| {
expr.fold(&mut Reduce)
.map_err(|e| Box::new(e) as Box<dyn Error>)
})
.and_then(|term| {
let mut context = Context::default();
term.fold(&mut TypeInfer {
context: &mut context,
})
.map_err(|e| Box::new(e) as Box<dyn Error>)
})
.map(|typed| {
let mut backend = RustBackend::default();
let id = typed.gen(&mut backend);
backend.emit_code(None, Span::call_site(), id)
})
.and_then(|code| {
write!(io::stdout(), "{:#}", code).map_err(|e| Box::new(e) as Box<dyn Error>)
});
if let Err(e) = res {
eprintln!("{}", e);
exit(1)
}
}
|
