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Parse error improvements #37

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Parse error improvements #37

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10 changes: 9 additions & 1 deletion src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,15 @@ fn main() {
Box::new(BufReader::new(io::stdin())) as Box<dyn BufRead>
};

let input_parsed = ParsedFormula::new(&mut reader).expect("Could not parse input file");
let input_parsed_result = ParsedFormula::new(&mut reader);

if input_parsed_result.is_err() {
eprintln!("Could not parse formula:");
eprintln!("{}", input_parsed_result.err().unwrap());
return;
}

let input_parsed = input_parsed_result.unwrap();

if let Some(parsetree_filename) = args.value_of("show_parsetree") {
let mut f = File::create(parsetree_filename).expect("Could not create parsetree dot file");
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