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Fix printing negative signed literal in print_literal #18160

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Merged
merged 1 commit into from
Oct 20, 2014
Merged

Fix printing negative signed literal in print_literal #18160

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11 changes: 10 additions & 1 deletion src/libsyntax/print/pprust.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2680,8 +2680,9 @@ impl<'a> State<'a> {
ast_util::int_ty_to_string(st, Some(i as i64)).as_slice())
}
ast::SignedIntLit(st, ast::Minus) => {
let istr = ast_util::int_ty_to_string(st, Some(-(i as i64)));
word(&mut self.s,
ast_util::int_ty_to_string(st, Some(-(i as i64))).as_slice())
format!("-{}", istr).as_slice())
}
ast::UnsignedIntLit(ut) => {
word(&mut self.s, ast_util::uint_ty_to_string(ut, Some(i)).as_slice())
Expand Down Expand Up @@ -2930,4 +2931,12 @@ mod test {
let varstr = variant_to_string(&var);
assert_eq!(&varstr,&"pub principal_skinner".to_string());
}

#[test]
fn test_signed_int_to_string() {
let pos_int = ast::LitInt(42, ast::SignedIntLit(ast::TyI32, ast::Plus));
let neg_int = ast::LitInt((-42) as u64, ast::SignedIntLit(ast::TyI32, ast::Minus));
assert_eq!(format!("-{}", lit_to_string(&codemap::dummy_spanned(pos_int))),
lit_to_string(&codemap::dummy_spanned(neg_int)));
}
}