E0370 - Error codes index
Description: Book listing all Rust error codes

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# Error code E0370

The maximum value of an enum was reached, so it cannot be automatically set in the next enum value.

Erroneous code example:

    #![allow(unused)]
    fn main() {
    #[repr(i64)]
    enum Foo {
        X = 0x7fffffffffffffff,
        Y, // error: enum discriminant overflowed on value after
           //        9223372036854775807: i64; set explicitly via
           //        Y = -9223372036854775808 if that is desired outcome
    }
    }

To fix this, please set manually the next enum value or put the enum variant with the maximum value at the end of the enum. Examples:

    #![allow(unused)]
    fn main() {
    #[repr(i64)]
    enum Foo {
        X = 0x7fffffffffffffff,
        Y = 0, // ok!
    }
    }

Or:

    #![allow(unused)]
    fn main() {
    #[repr(i64)]
    enum Foo {
        Y = 0, // ok!
        X = 0x7fffffffffffffff,
    }
    }