Error code E0435
A non-constant value was used in a constant expression.
Erroneous code example:
#![allow(unused)] fn main() { let foo = 42; let a: [u8; foo]; // error: attempt to use a non-constant value in a constant }
'constant' means 'a compile-time value'.
More details can be found in the Variables and Mutability section of the book.
To fix this error, please replace the value with a constant. Example:
#![allow(unused)] fn main() { let a: [u8; 42]; // ok! }
Or:
#![allow(unused)] fn main() { const FOO: usize = 42; let a: [u8; FOO]; // ok! }