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