Witch of Git - ivy/blob - src/main.rs

   1 use ess::{self, parser::ParseError, Sexp};
   2 use std::io::{self, Read};
   3
   4 mod ast;
   5 mod trans;
   6
   7 use ast::Ast;
   8 use trans::translate;
   9
  10 fn parse(input: &str) -> Result<Sexp, ParseError> {
  11     let (sexp, rest) = ess::parse_one(input)?;
  12     if !rest.trim().is_empty() {
  13         return Err(ParseError::Unexpected('\0', sexp.get_loc().1));
  14     }
  15     Ok(sexp)
  16 }
  17
  18 static BUILTINS: &[&str] = &[
  19     "debug", "true", "false", "<", ">", "<=", ">=", "==", "!=", "+", "-", "*", "/", "%",
  20 ];
  21
  22 fn main() -> io::Result<()> {
  23     let stdin = std::io::stdin();
  24     let mut text = String::new();
  25     stdin.lock().read_to_string(&mut text)?;
  26     let sexp = match parse(&text) {
  27         Ok(item) => item,
  28         Err(err) => {
  29             println!("{:?}", err);
  30             std::process::exit(1);
  31         }
  32     };
  33     let (ast, builtins) = match Ast::parse(BUILTINS, &sexp) {
  34         Ok(ast) => ast,
  35         Err(err) => {
  36             println!("{}", err);
  37             std::process::exit(1);
  38         }
  39     };
  40     let code = match translate(&ast) {
  41         Ok(code) => code,
  42         Err(err) => {
  43             println!("{}", err);
  44             std::process::exit(1);
  45         }
  46     };
  47     println!("{:#?}", code);
  48     Ok(())
  49 }