src/test/ui/pattern/usefulness/floats.rs

#![allow(illegal_floating_point_literal_pattern)]
#![deny(unreachable_patterns)]

fn main() {
    match 0.0 {
      0.0..=1.0 => {}
      _ => {} // ok
    }

    match 0.0 { //~ ERROR non-exhaustive patterns
      0.0..=1.0 => {}
    }

    match 1.0f64 {
      0.01f64 ..= 6.5f64 => {}
      0.02f64 => {} //~ ERROR unreachable pattern
      _ => {}
    };
}