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|
use std::{
error::Error,
io::{self, Read, Write},
process::exit,
};
use chewed::{IterWrapper, Parser};
use chomp::{
chomp::{
ast::substitute::Reduce,
typed::{
context::Context,
lower::{Backend, GenerateCode},
TypeInfer,
},
visit::Visitable,
},
lower::RustBackend,
nibble::convert::{self, Convert},
};
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(|_| {
IterWrapper::new(input.chars())
.parse::<autonibble::Ast>()
.map_err(|e| Box::new(e) as Box<dyn Error>)
})
.and_then(|ast| {
ast.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)
}
}
|
