src/test/ui/lint/type-overflow.rs

// check-pass
#![warn(overflowing_literals)]

fn main() {
    let error = 255i8; //~WARNING literal out of range for `i8`

    let ok = 0b1000_0001; // should be ok -> i32
    let ok = 0b0111_1111i8; // should be ok -> 127i8

    let fail = 0b1000_0001i8; //~WARNING literal out of range for i8

    let fail = 0x8000_0000_0000_0000i64; //~WARNING literal out of range for i64

    let fail = 0x1_FFFF_FFFFu32; //~WARNING literal out of range for u32

    let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000;
    //~^ WARNING literal out of range for i128

    let fail = 0x8FFF_FFFF_FFFF_FFFE; //~WARNING literal out of range for i32

    let fail = -0b1111_1111i8; //~WARNING literal out of range for i8
}