rust/tests/compile-fail/range.rs
Nathan Weston 23a38c4170 New lint: Range::step_by(0) (fixes #95)
Uses type information so it can detect non-literal ranges as well
(Range or RangeFrom -- the other range types don't have step_by).
2015-08-16 12:58:54 -04:00

25 lines
559 B
Rust

#![feature(step_by)]
#![feature(plugin)]
#![plugin(clippy)]
struct NotARange;
impl NotARange {
fn step_by(&self, _: u32) {}
}
#[deny(range_step_by_zero)]
fn main() {
(0..1).step_by(0); //~ERROR Range::step_by(0) produces an infinite iterator
// No warning for non-zero step
(0..1).step_by(1);
(1..).step_by(0); //~ERROR Range::step_by(0) produces an infinite iterator
let x = 0..1;
x.step_by(0); //~ERROR Range::step_by(0) produces an infinite iterator
// No error, not a range.
let y = NotARange;
y.step_by(0);
}