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Better error handling in REPL

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We have much better spanned expression support, so now we get to show
it off!
This commit is contained in:
Alex Bethel 2021-06-07 20:08:38 -05:00
parent a0c1f93392
commit dc5ef63fef
1 changed files with 18 additions and 20 deletions
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38
src/repl.rs
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@ -15,27 +15,25 @@ pub fn repl() {
break; break;
} }
let mut parser = Parser::new(&line); let mut parser = Parser::new(&line);
let ast = parser.init(); let value = parser.init().and_then(|ast| {
match ast { println!("{:?}", &ast);
Ok(ast) => { env.eval_stmts(&ast)
println!("{:?}", ast); });
println!("{:?}", env.eval_stmts(&ast));
}
Err(e) => {
println!(
"Error `{:?}` occurred at span: {:?} = `{:?}`",
e.kind,
e.span.clone(),
line.slice(e.span.clone())
);
println!(" | {}", line); if let Err(e) = value {
println!( println!(
" {}{}-- Here", "Error `{:?}` occurred at span: {:?} = `{:?}`",
" ".repeat(e.span.start), e.kind,
"^".repeat((e.span.end - e.span.start).max(1)) e.span.clone(),
); line.slice(e.span.clone())
} );
println!(" | {}", line);
println!(
" {}{}-- Here",
" ".repeat(e.span.start),
"^".repeat((e.span.end - e.span.start).max(1))
);
} }
} }
Err(rustyline::error::ReadlineError::Eof) => { Err(rustyline::error::ReadlineError::Eof) => {