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|
use chomp::{
ast::{
convert::{Context, Convert},
typed::{FlastContext, Type},
},
nibble::Expression,
};
use proc_macro2::Span;
use std::process::exit;
use std::{
error::Error,
io::{self, Read, Write},
};
use syn::Ident;
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>))
.map(|nibble: Expression| {
nibble
.convert(&Context::new())
.well_typed(&mut FlastContext::new())
})
.map(|res| match res {
Ok((typed, _)) => typed.emit_code(Ident::new("Ast", Span::call_site())),
Err(e) => syn::Error::from(e).to_compile_error(),
})
.and_then(|code| {
write!(io::stdout(), "{:#}", code).map_err(|e| Box::new(e) as Box<dyn Error>)
});
if let Err(e) = res {
eprintln!("{}", e);
drop(e);
exit(1)
}
}
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